anvil/Anvil/Tools/Get.pm

package Anvil::Tools::Get;
# 
# This module contains methods used to handle access to frequently used data.
# 

use strict;
use warnings;
use Scalar::Util qw(weaken isweak);
use Data::Dumper;
use Encode;
use JSON;
use Net::Netmask;
use Text::Diff;
use UUID::Tiny qw(:std);

our $VERSION  = "3.0.0";
my $THIS_FILE = "Get.pm";

### Methods;
# anvil_name_from_uuid
# anvil_version
# available_resources
# bridges
# cgi
# date_and_time
# domain_name
# free_memory
# host_from_ip_address
# host_name
# host_name_from_uuid
# host_uuid_from_name
# host_type
# host_uuid
# kernel_release
# md5sum
# os_type
# server_uuid_from_name
# switches
# trusted_hosts
# uptime
# users_home
# uuid
# _salt
# _wrap_to

=pod

=encoding utf8

=head1 NAME

Anvil::Tools::Get

Provides all methods related to getting access to frequently used data.

=head1 SYNOPSIS

 use Anvil::Tools;

 # Get a common object handle on all Anvil::Tools modules.
 my $anvil = Anvil::Tools->new();
 
 # Access to methods using '$anvil->Get->X'. 
 # 
 # Example using 'date_and_time()';
 my $date = $anvil->Get->date_and_time({...});

=head1 METHODS

Methods in this module;

=cut
sub new
{
	my $class = shift;
	my $self  = {
		HOST	=>	{
			UUID	=>	"",
		},
	};
	
	bless $self, $class;
	
	return ($self);
}

# Get a handle on the Anvil::Tools object. I know that technically that is a sibling module, but it makes more 
# sense in this case to think of it as a parent.
sub parent
{
	my $self   = shift;
	my $parent = shift;
	
	$self->{HANDLE}{TOOLS} = $parent if $parent;
	
	# Defend against memory leads. See Scalar::Util'.
	if (not isweak($self->{HANDLE}{TOOLS}))
	{
		weaken($self->{HANDLE}{TOOLS});
	}
	
	return ($self->{HANDLE}{TOOLS});
}


#############################################################################################################
# Public methods                                                                                            #
#############################################################################################################


=head2 anvil_name_from_uuid

This takes a Anvil! UUID and returns the Anvil! name (as recorded in the C<< anvils >> table). If the entry is not found, an empty string is returned. If there is a problem, C<< !!error!! >> will be returned.

Parameters;

=head3 anvil_uuid (required)

This is the C<< anvils >> -> C<< anvil_uuid >> to translate into the Anvil! name.

=cut
sub anvil_name_from_uuid
{
	my $self      = shift;
	my $parameter = shift;
	my $anvil     = $self->parent;
	my $debug     = defined $parameter->{debug} ? $parameter->{debug} : 3;
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => $debug, key => "log_0125", variables => { method => "Get->anvil_name_from_uuid()" }});
	
	my $anvil_name = "";
	my $anvil_uuid = defined $parameter->{anvil_uuid} ? $parameter->{anvil_uuid} : "";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { anvil_uuid => $anvil_uuid }});
	
	if (not $anvil_uuid)
	{
		$anvil_uuid = $anvil->Cluster->get_anvil_uuid({debug => $debug});
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { anvil_uuid => $anvil_uuid }});
		
		if (not $anvil_uuid)
		{
			$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 0, priority => "err", key => "log_0020", variables => { method => "Get->anvil_name_from_uuid()", parameter => "server_name" }});
			return("!!error!!");
		}
	}
	
	my $query = "
SELECT 
    anvil_name 
FROM 
    anvils 
WHERE 
    anvil_uuid = ".$anvil->Database->quote($anvil_uuid).";
";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { query => $query }});
	my $results = $anvil->Database->query({query => $query, source => $THIS_FILE, line => __LINE__});
	my $count   = @{$results};
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
		results => $results, 
		count   => $count, 
	}});
	if ($count == 1)
	{
		# Found it
		$anvil_name = defined $results->[0]->[0] ? $results->[0]->[0] : "";
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { anvil_name => $anvil_name }});
	}
	
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { anvil_name => $anvil_name }});
	return($anvil_name);
}


=head2 anvil_version

This reads to C<< VERSION >> file of a local or remote machine. If the version file isn't found, C<< 0 >> is returned. 

This also reads the main C<< anvil.sql >> schema file and parses 

Parameters;

=head3 password (optional)

This is the password to use when connecting to a remote machine. If not set, but C<< target >> is, an attempt to connect without a password will be made.

=head3 port (optional)

This is the TCP port to use when connecting to a remote machine. If not set, but C<< target >> is, C<< 22 >> will be used.

=head3 remote_user (optional, default root)

If C<< target >> is set, this will be the user we connect to the remote machine as.

=head3 target (optional)

This is the IP or host name of the machine to read the version of. If this is not set, the local system's version is checked.

=cut
# NOTE: the version is set in anvil.spec by sed'ing the release and arch onto anvil.version in anvil-core's %post
sub anvil_version
{
	my $self      = shift;
	my $parameter = shift;
	my $anvil     = $self->parent;
	my $debug     = defined $parameter->{debug} ? $parameter->{debug} : 3;
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => $debug, key => "log_0125", variables => { method => "Get->anvil_version()" }});
	
	my $password    = defined $parameter->{password}    ? $parameter->{password}    : "";
	my $port        = defined $parameter->{port}        ? $parameter->{port}        : "";
	my $remote_user = defined $parameter->{remote_user} ? $parameter->{remote_user} : "root";
	my $target      = defined $parameter->{target}      ? $parameter->{target}      : "";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
		password    => $anvil->Log->is_secure($password),
		port        => $port, 
		remote_user => $remote_user, 
		target      => $target, 
	}});
	
	# The variables that will store the versions.
	my $anvil_version  = 0;
	my $schema_version = 0;
	my $schema_body    = "";
	
	# Is this a local call or a remote call?
	if ($anvil->Network->is_local({host => $target}))
	{
		# Local.
		$anvil_version = $anvil->Storage->read_file({file => $anvil->data->{path}{configs}{'anvil.version'}});
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { anvil_version => $anvil_version }});
		
		# Did we actually read a version?
		if ($anvil_version eq "!!error!!")
		{
			$anvil_version = 0;
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 1, list => { anvil_version => $anvil_version }});
		}
		
		# Now read in the SQL schema
		$schema_body = $anvil->Storage->read_file({file => $anvil->data->{path}{sql}{'anvil.sql'}});
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { anvil_version => $anvil_version }});
		
		# Did we actually read a version?
		if ($schema_body eq "!!error!!")
		{
			$schema_version = 0;
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 1, list => { schema_version => $schema_version }});
		}
	}
	else
	{
		# Remote call. If we're running as the apache user, we need to read the cached version for 
		# the peer. otherwise, after we read the version, will write the cached version.
		my $user              = getpwuid($<);
		my $anvil_cache_file  = $anvil->data->{path}{directories}{anvil}."/anvil.".$target.".version";
		my $schema_cache_file = $anvil->data->{path}{directories}{anvil}."/anvil.".$target.".schema";
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
			anvil_cache_file  => $anvil_cache_file, 
			schema_cache_file => $schema_cache_file, 
			user              => $user,
		}});
		if ($user eq "apache")
		{
			# Try to read the local cached version.
			if (-e $anvil_cache_file)
			{
				# Read it in.
				$anvil_version = $anvil->Storage->read_file({file => $anvil_cache_file});
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { anvil_version => $anvil_version }});
			}
			if (-e $schema_cache_file)
			{
				# Read it in.
				$schema_body = $anvil->Storage->read_file({file => $schema_cache_file});
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { anvil_version => $anvil_version }});
			}
		}
		else
		{
			foreach my $file ($anvil->data->{path}{configs}{'anvil.version'}, $anvil->data->{path}{sql}{'anvil.sql'})
			{
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { file => $file }});
				my $shell_call = "
if [ -e ".$file." ];
then
    cat ".$file.";
else
   echo 0;
fi;
";
				$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => $debug, key => "log_0166", variables => { shell_call => $shell_call, target => $target, remote_user => $remote_user }});
				my ($file_body, $error, $return_code) = $anvil->Remote->call({
					debug       => $debug, 
					shell_call  => $shell_call, 
					target      => $target,
					port        => $port, 
					password    => $password,
					remote_user => $remote_user, 
				});
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
					file_body => $file_body,
					error     => $error,
				}});
				
				if ($file eq $anvil->data->{path}{configs}{'anvil.version'})
				{
					$anvil_version = $file_body;
					$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { anvil_version => $anvil_version }});
				}
				else
				{
					$schema_body = $file_body;
					$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { schema_body => $schema_body }});
				}
				
				# Create/Update the cache file.
				if ($file_body)
				{
					my $update_cache  = 0;
					my $old_file_body = "";
					my $cache_file    = $file eq $anvil->data->{path}{configs}{'anvil.version'} ? $anvil_cache_file : $schema_cache_file;
					$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { cache_file => $cache_file }});
					if (-e $cache_file)
					{
						$old_file_body = $anvil->Storage->read_file({file => $cache_file});
						$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
							old_file_body => $old_file_body,
							file_body     => $file_body, 
						}});
						my $difference = diff \$old_file_body, \$file_body, { STYLE => 'Unified' };
						$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { difference => $difference }});
						if ($difference)
						{
							# update needed
							$update_cache = 1;
							$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { update_cache => $update_cache }});
						}
					}
					else
					{
						# Cache file needs to be created.
						$update_cache = 1;
						$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { update_cache => $update_cache }});
					}
					
					$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { update_cache => $update_cache }});
					if ($update_cache)
					{
						$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 1, key => "log_0437", variables => { 
							target => $target, 
							file   => $cache_file, 
						}});
						$anvil->Storage->write_file({
							debug     => $debug, 
							backup    => 0,
							file      => $cache_file, 
							body      => $file_body,
							mode      => "0666",
							overwrite => 1,
						});
					}
				}
			}
		}
	}
	
	# Clear off any newline.
	$anvil_version =~ s/\n//gs;
	
	# Pull the schema version out of the schema body.
	foreach my $line (split/\n/, $schema_body)
	{
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { line => $line }});
		if ($line =~ /-- SchemaVersion: (\d+\.\d+\.\d+)/)
		{
			$schema_version = $1; 
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { schema_version => $schema_version }});
			last;
		}
	}
	
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
		anvil_version  => $anvil_version, 
		schema_version => $schema_version,
	}});
	return($anvil_version, $schema_version);
}


=head2 available_resources

This method looks at the resource used and available on the nodes in a given Anvil! system. The DR's resources are also ready, but don't contribute to the "least available" values.

If either node has no data in the C<< scan_hardware >> table, this method will return with C<< !!no_data!! >>. Callers should abort on this value and remind the user that ScanCore needs to run on both nodes.

Data is store in the following hashes;

 anvil_resources::<anvil_uuid>::cpu::cores
 anvil_resources::<anvil_uuid>::cpu::threads
 anvil_resources::<anvil_uuid>::ram::available
 anvil_resources::<anvil_uuid>::ram::allocated
 anvil_resources::<anvil_uuid>::ram::hardware
 anvil_resources::<anvil_uuid>::bridges::<bridge_name>::on_nodes
 anvil_resources::<anvil_uuid>::bridges::<bridge_name>::on_dr
 anvil_resources::<anvil_uuid>::storage_group::<storage_group_uuid>::group_name
 anvil_resources::<anvil_uuid>::storage_group::<storage_group_uuid>::vg_size
 anvil_resources::<anvil_uuid>::storage_group::<storage_group_uuid>::free_size
 anvil_resources::<anvil_uuid>::storage_group::<storage_group_uuid>::vg_size_on_dr
 anvil_resources::<anvil_uuid>::storage_group::<storage_group_uuid>::available_on_dr

All sizes are stored in bytes.

Parameters;

=head3 anvil_uuid (required)

This is the Anvil! UUID for which we're getting available resources from.

=cut
sub available_resources
{
	my $self      = shift;
	my $parameter = shift;
	my $anvil     = $self->parent;
	my $debug     = defined $parameter->{debug} ? $parameter->{debug} : 3;
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => $debug, key => "log_0125", variables => { method => "Get->available_resources()" }});
	
	my $anvil_uuid = defined $parameter->{anvil_uuid} ? $parameter->{anvil_uuid} : "";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
		anvil_uuid=> $anvil_uuid,
	}});
	
	if (not $anvil_uuid)
	{
		$anvil_uuid = $anvil->Cluster->get_anvil_uuid({debug => $debug});
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { anvil_uuid => $anvil_uuid }});
		
		if (not $anvil_uuid)
		{
			$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 0, priority => "err", key => "log_0020", variables => { method => "Get->available_resources()", parameter => "anvil_uuid" }});
			return("!!error!!");
		}
	}
	
	if (exists $anvil->data->{anvil_resources}{$anvil_uuid})
	{
		delete $anvil->data->{anvil_resources}{$anvil_uuid};
	}
	
	# Get the node UUIDs for this anvil.
	my $query = "
SELECT 
    anvil_name, 
    anvil_node1_host_uuid, 
    anvil_node2_host_uuid, 
    anvil_dr1_host_uuid 
FROM 
    anvils 
WHERE 
    anvil_uuid = ".$anvil->Database->quote($anvil_uuid)."
;";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { query => $query }});
	my $results = $anvil->Database->query({query => $query, source => $THIS_FILE, line => __LINE__});
	my $count   = @{$results};
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
		results => $results, 
		count   => $count, 
	}});
	if (not $count)
	{
		# Not found.
		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 0, priority => "err", key => "error_0169", variables => { anvil_uuid => $anvil_uuid }});
		return("!!error!!");
	}
	
	# Get the details.
	my $anvil_name      =         $results->[0]->[0];
	my $node1_host_uuid =         $results->[0]->[1];
	my $node2_host_uuid =         $results->[0]->[2];
	my $dr1_host_uuid   = defined $results->[0]->[3] ? $results->[0]->[3] : "";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
		anvil_name      => $anvil_name,
		node1_host_uuid => $node1_host_uuid, 
		node2_host_uuid => $node2_host_uuid, 
		dr1_host_uuid   => $dr1_host_uuid, 
	}});
	
	$anvil->data->{anvil_resources}{$anvil_uuid}{has_dr} = $dr1_host_uuid ? 1 : 0;
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
		"anvil_resources::${anvil_uuid}::has_dr" => $anvil->data->{anvil_resources}{$anvil_uuid}{has_dr},
	}});
	
	# Load hosts and network bridges
	$anvil->Database->get_hosts({debug => $debug});
	$anvil->Database->get_bridges({debug => $debug});
	
	# This both loads storage group data and assembles ungrouped VGs into storage groups, when possible.
	$anvil->Cluster->assemble_storage_groups({
		debug      => $debug,
		anvil_uuid => $anvil_uuid, 
	});
	
	# This will store the available resources based on the least of the nodes.
	$anvil->data->{anvil_resources}{$anvil_uuid}{cpu}{cores}    = 0;
	$anvil->data->{anvil_resources}{$anvil_uuid}{cpu}{threads}  = 0;
	$anvil->data->{anvil_resources}{$anvil_uuid}{ram}{hardware} = 0;

	foreach my $host_uuid ($node1_host_uuid, $node2_host_uuid, $dr1_host_uuid)
	{
		# If DR isn't defined, it'll be blank.
		next if not $host_uuid;
		my $this_is = "node1";
		if ($host_uuid eq $node2_host_uuid)  { $this_is = "node2"; }
		elsif ($host_uuid eq $dr1_host_uuid) { $this_is = "dr1";   }
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { this_is => $this_is }});
		
		# Start collecting data.
		my $host_name = $anvil->data->{hosts}{host_uuid}{$host_uuid}{host_name};
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
			host_uuid => $host_uuid,
			host_name => $host_name, 
		}});
		
		# Gather bridge data.
		foreach my $bridge_name (sort {$a cmp $b} keys %{$anvil->data->{bridges}{bridge_host_uuid}{$host_uuid}{bridge_name}})
		{
			my $bridge_uuid = $anvil->data->{bridges}{bridge_host_uuid}{$host_uuid}{bridge_name}{$bridge_name}{bridge_uuid};
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
				bridge_uuid => $bridge_uuid,
				bridge_name => $bridge_name, 
			}});
			
			$anvil->data->{anvil_resources}{$anvil_uuid}{bridges}{$bridge_name}{on}{$host_uuid} = 1;
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
				"anvil_resources::${anvil_uuid}::bridges::${bridge_name}::on::${host_uuid}" => $bridge_name, 
			}});
		}
		
		# Get the CPU and RAM data 
		my $query = "
SELECT 
    scan_hardware_cpu_cores, 
    scan_hardware_cpu_threads, 
    scan_hardware_cpu_model, 
    scan_hardware_ram_total 
FROM 
    scan_hardware 
WHERE 
    scan_hardware_host_uuid = ".$anvil->Database->quote($host_uuid)."
;";
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { query => $query }});
		my $results = $anvil->Database->query({query => $query, source => $THIS_FILE, line => __LINE__});
		my $count   = @{$results};
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
			results => $results, 
			count   => $count, 
		}});
		
		if (not $count)
		{
			# Looks like scan-hardware hasn't run. We can't use this host yet.
			$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 0, priority => "err", key => "error_0236", variables => { host_name => $host_name }});
			return('!!no_data!!');
		}
		
		my $scan_hardware_cpu_cores   = $results->[0]->[0];
		my $scan_hardware_cpu_threads = $results->[0]->[1];
		my $scan_hardware_cpu_model   = $results->[0]->[2];
		my $scan_hardware_ram_total   = $results->[0]->[3];
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
			scan_hardware_cpu_cores   => $scan_hardware_cpu_cores,
			scan_hardware_cpu_threads => $scan_hardware_cpu_threads, 
			scan_hardware_cpu_model   => $scan_hardware_cpu_model, 
			scan_hardware_ram_total   => $scan_hardware_ram_total, 
		}});
		
		$anvil->data->{anvil_resources}{$anvil_uuid}{host_uuid}{$host_uuid}{cpu}{cores}     = $scan_hardware_cpu_cores;
		$anvil->data->{anvil_resources}{$anvil_uuid}{host_uuid}{$host_uuid}{cpu}{threads}   = $scan_hardware_cpu_threads;
		$anvil->data->{anvil_resources}{$anvil_uuid}{host_uuid}{$host_uuid}{cpu}{model}     = $scan_hardware_cpu_model;
		$anvil->data->{anvil_resources}{$anvil_uuid}{host_uuid}{$host_uuid}{ram}{hardware}  = $scan_hardware_ram_total;
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
			"anvil_resources::${anvil_uuid}::host_uuid::${host_uuid}::cpu::cores"     => $anvil->data->{anvil_resources}{$anvil_uuid}{host_uuid}{$host_uuid}{cpu}{cores},
			"anvil_resources::${anvil_uuid}::host_uuid::${host_uuid}::cpu::threads"   => $anvil->data->{anvil_resources}{$anvil_uuid}{host_uuid}{$host_uuid}{cpu}{threads},
			"anvil_resources::${anvil_uuid}::host_uuid::${host_uuid}::cpu::model"     => $anvil->data->{anvil_resources}{$anvil_uuid}{host_uuid}{$host_uuid}{cpu}{model},
			"anvil_resources::${anvil_uuid}::host_uuid::${host_uuid}::ram::hardware"  => $anvil->data->{anvil_resources}{$anvil_uuid}{host_uuid}{$host_uuid}{ram}{hardware}." (".$anvil->Convert->bytes_to_human_readable({'bytes' => $anvil->data->{anvil_resources}{$anvil_uuid}{host_uuid}{$host_uuid}{ram}{hardware}}).")",
		}});
		
		# For available resources, we only care about nodes.
		if ($this_is !~ /^dr/)
		{
			# How many cores?
			if ((not $anvil->data->{anvil_resources}{$anvil_uuid}{cpu}{cores}) or 
			    ($scan_hardware_cpu_cores < $anvil->data->{anvil_resources}{$anvil_uuid}{cpu}{cores}))
			{
				$anvil->data->{anvil_resources}{$anvil_uuid}{cpu}{cores} = $scan_hardware_cpu_cores;
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
					"anvil_resources::${anvil_uuid}::cpu::cores" => $anvil->data->{anvil_resources}{$anvil_uuid}{cpu}{cores},
				}});
			}
			if ((not $anvil->data->{anvil_resources}{$anvil_uuid}{cpu}{threads}) or 
			    ($scan_hardware_cpu_threads < $anvil->data->{anvil_resources}{$anvil_uuid}{cpu}{threads}))
			{
				$anvil->data->{anvil_resources}{$anvil_uuid}{cpu}{threads} = $scan_hardware_cpu_threads;
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
					"anvil_resources::${anvil_uuid}::cpu::threads" => $anvil->data->{anvil_resources}{$anvil_uuid}{cpu}{threads},
				}});
			}
			if ((not $anvil->data->{anvil_resources}{$anvil_uuid}{ram}{available}) or 
			    ($scan_hardware_ram_total < $anvil->data->{anvil_resources}{$anvil_uuid}{ram}{hardware}))
			{
				$anvil->data->{anvil_resources}{$anvil_uuid}{ram}{available} = $scan_hardware_ram_total;
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
					"anvil_resources::${anvil_uuid}::ram::available" => $anvil->data->{anvil_resources}{$anvil_uuid}{ram}{available}." (".$anvil->Convert->bytes_to_human_readable({'bytes' => $anvil->data->{anvil_resources}{$anvil_uuid}{ram}{available}}).")",
				}});
			}
		}
	}
	
	# Read in the amount of RAM allocated to servers and subtract it from the RAM available.
	$anvil->data->{anvil_resources}{$anvil_uuid}{ram}{allocated} =  0;
	$anvil->data->{anvil_resources}{$anvil_uuid}{ram}{hardware}  = $anvil->data->{anvil_resources}{$anvil_uuid}{ram}{available};
	
	$query = "
SELECT 
    server_name, 
    server_ram_in_use 
FROM 
    servers 
WHERE 
    server_anvil_uuid = ".$anvil->Database->quote($anvil_uuid)." 
ORDER BY 
    server_name ASC;";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { query => $query }});
	$results = $anvil->Database->query({query => $query, source => $THIS_FILE, line => __LINE__});
	$count   = @{$results};
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
		results => $results, 
		count   => $count, 
	}});
	foreach my $row (@{$results})
	{
		my $server_name = $row->[0];
		my $ram_in_use  = $row->[1];
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
			"s1:server_name" => $server_name,
			"s2:ram_in_use"  => $ram_in_use." (".$anvil->Convert->bytes_to_human_readable({'bytes' => $ram_in_use}).")",
		}});
		
		$anvil->data->{anvil_resources}{$anvil_uuid}{ram}{allocated} += $ram_in_use;
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
			"anvil_resources::${anvil_uuid}::ram::allocated" => $anvil->data->{anvil_resources}{$anvil_uuid}{ram}{allocated}." (".$anvil->Convert->bytes_to_human_readable({'bytes' => $anvil->data->{anvil_resources}{$anvil_uuid}{ram}{allocated}}).")",
		}});
	}

	# Take 4 GiB off the available RAM for the host
	$anvil->data->{anvil_resources}{$anvil_uuid}{ram}{reserved}  =  (4*(2**30));	# Reserve 4 GiB
	$anvil->data->{anvil_resources}{$anvil_uuid}{ram}{available} -= $anvil->data->{anvil_resources}{$anvil_uuid}{ram}{reserved};
	$anvil->data->{anvil_resources}{$anvil_uuid}{ram}{available} -= $anvil->data->{anvil_resources}{$anvil_uuid}{ram}{allocated};
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
		"anvil_resources::${anvil_uuid}::ram::allocated" => $anvil->data->{anvil_resources}{$anvil_uuid}{ram}{allocated}." (".$anvil->Convert->bytes_to_human_readable({'bytes' => $anvil->data->{anvil_resources}{$anvil_uuid}{ram}{allocated}}).")",
		"anvil_resources::${anvil_uuid}::ram::reserved"  => $anvil->data->{anvil_resources}{$anvil_uuid}{ram}{reserved}." (".$anvil->Convert->bytes_to_human_readable({'bytes' => $anvil->data->{anvil_resources}{$anvil_uuid}{ram}{reserved}}).")",
		"anvil_resources::${anvil_uuid}::ram::available" => $anvil->data->{anvil_resources}{$anvil_uuid}{ram}{available}." (".$anvil->Convert->bytes_to_human_readable({'bytes' => $anvil->data->{anvil_resources}{$anvil_uuid}{ram}{available}}).")",
	}});
	
	# process bridges now
	foreach my $bridge_name (sort {$a cmp $b} keys %{$anvil->data->{anvil_resources}{$anvil_uuid}{bridges}})
	{
		$anvil->data->{anvil_resources}{$anvil_uuid}{bridges}{$bridge_name}{on_nodes} = 0;
		$anvil->data->{anvil_resources}{$anvil_uuid}{bridges}{$bridge_name}{on_dr}    = 0;
		if (($anvil->data->{anvil_resources}{$anvil_uuid}{bridges}{$bridge_name}{on}{$node1_host_uuid}) && 
		    ($anvil->data->{anvil_resources}{$anvil_uuid}{bridges}{$bridge_name}{on}{$node2_host_uuid}))
		{
			$anvil->data->{anvil_resources}{$anvil_uuid}{bridges}{$bridge_name}{on_nodes} = 1;
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
				"anvil_resources::${anvil_uuid}::bridges::${bridge_name}::on_nodes" => $anvil->data->{anvil_resources}{$anvil_uuid}{bridges}{$bridge_name}{on_nodes},
			}});
		}
		if ($anvil->data->{anvil_resources}{$anvil_uuid}{bridges}{$bridge_name}{on}{$dr1_host_uuid})
		{
			$anvil->data->{anvil_resources}{$anvil_uuid}{bridges}{$bridge_name}{on_dr} = 1;
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
				"anvil_resources::${anvil_uuid}::bridges::${bridge_name}::on_dr" => $anvil->data->{anvil_resources}{$anvil_uuid}{bridges}{$bridge_name}{on_dr},
			}});
		}
	}
	
	foreach my $storage_group_uuid (keys %{$anvil->data->{storage_groups}{anvil_uuid}{$anvil_uuid}{storage_group_uuid}})
	{
		$anvil->data->{anvil_resources}{$anvil_uuid}{storage_group}{$storage_group_uuid}{group_name} = $anvil->data->{storage_groups}{anvil_uuid}{$anvil_uuid}{storage_group_uuid}{$storage_group_uuid}{group_name};
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
			"anvil_resources::${anvil_uuid}::storage_group::${storage_group_uuid}::group_name" => $anvil->data->{anvil_resources}{$anvil_uuid}{storage_group}{$storage_group_uuid}{group_name},
		}});
		
		my $node1_vg_size = 0;
		my $node1_vg_free = 0;
		my $node2_vg_size = 0;
		my $node2_vg_free = 0;
		my $dr1_vg_size = 0;
		my $dr1_vg_free = 0;
		if (exists $anvil->data->{storage_groups}{anvil_uuid}{$anvil_uuid}{storage_group_uuid}{$storage_group_uuid}{host_uuid}{$node1_host_uuid})
		{
			$node1_vg_size = $anvil->data->{storage_groups}{anvil_uuid}{$anvil_uuid}{storage_group_uuid}{$storage_group_uuid}{host_uuid}{$node1_host_uuid}{vg_size};
			$node1_vg_free = $anvil->data->{storage_groups}{anvil_uuid}{$anvil_uuid}{storage_group_uuid}{$storage_group_uuid}{host_uuid}{$node1_host_uuid}{vg_free};
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
				node1_vg_size => $node1_vg_size." (".$anvil->Convert->bytes_to_human_readable({'bytes' => $node1_vg_size}).")",
				node1_vg_free => $node1_vg_free." (".$anvil->Convert->bytes_to_human_readable({'bytes' => $node1_vg_free}).")",
			}});
		}
		if (exists $anvil->data->{storage_groups}{anvil_uuid}{$anvil_uuid}{storage_group_uuid}{$storage_group_uuid}{host_uuid}{$node2_host_uuid})
		{
			$node2_vg_size = $anvil->data->{storage_groups}{anvil_uuid}{$anvil_uuid}{storage_group_uuid}{$storage_group_uuid}{host_uuid}{$node2_host_uuid}{vg_size};
			$node2_vg_free = $anvil->data->{storage_groups}{anvil_uuid}{$anvil_uuid}{storage_group_uuid}{$storage_group_uuid}{host_uuid}{$node2_host_uuid}{vg_free};
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
				node2_vg_size => $node2_vg_size." (".$anvil->Convert->bytes_to_human_readable({'bytes' => $node2_vg_size}).")",
				node2_vg_free => $node2_vg_free." (".$anvil->Convert->bytes_to_human_readable({'bytes' => $node2_vg_free}).")",
			}});
		}
		if (exists $anvil->data->{storage_groups}{anvil_uuid}{$anvil_uuid}{storage_group_uuid}{$storage_group_uuid}{host_uuid}{$dr1_host_uuid})
		{
			$dr1_vg_size = $anvil->data->{storage_groups}{anvil_uuid}{$anvil_uuid}{storage_group_uuid}{$storage_group_uuid}{host_uuid}{$dr1_host_uuid}{vg_size};
			$dr1_vg_free = $anvil->data->{storage_groups}{anvil_uuid}{$anvil_uuid}{storage_group_uuid}{$storage_group_uuid}{host_uuid}{$dr1_host_uuid}{vg_free};
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
				dr1_vg_size => $dr1_vg_size." (".$anvil->Convert->bytes_to_human_readable({'bytes' => $dr1_vg_size}).")",
				dr1_vg_free => $dr1_vg_free." (".$anvil->Convert->bytes_to_human_readable({'bytes' => $dr1_vg_free}).")",
			}});
		}
		
		$anvil->data->{anvil_resources}{$anvil_uuid}{storage_group}{$storage_group_uuid}{vg_size}         = $node2_vg_size < $node1_vg_size ? $node2_vg_size : $node1_vg_size;
		$anvil->data->{anvil_resources}{$anvil_uuid}{storage_group}{$storage_group_uuid}{free_size}       = $node2_vg_free < $node1_vg_free ? $node2_vg_free : $node1_vg_free;
		$anvil->data->{anvil_resources}{$anvil_uuid}{storage_group}{$storage_group_uuid}{vg_size_on_dr}   = $dr1_vg_size;
		$anvil->data->{anvil_resources}{$anvil_uuid}{storage_group}{$storage_group_uuid}{available_on_dr} = $dr1_vg_free;
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
			"anvil_resources::${anvil_uuid}::storage_group::${storage_group_uuid}::vg_size"         => $anvil->data->{anvil_resources}{$anvil_uuid}{storage_group}{$storage_group_uuid}{vg_size}." (".$anvil->Convert->bytes_to_human_readable({'bytes' => $anvil->data->{anvil_resources}{$anvil_uuid}{storage_group}{$storage_group_uuid}{vg_size}}).")",
			"anvil_resources::${anvil_uuid}::storage_group::${storage_group_uuid}::free_size"       => $anvil->data->{anvil_resources}{$anvil_uuid}{storage_group}{$storage_group_uuid}{free_size}." (".$anvil->Convert->bytes_to_human_readable({'bytes' => $anvil->data->{anvil_resources}{$anvil_uuid}{storage_group}{$storage_group_uuid}{free_size}}).")",
			"anvil_resources::${anvil_uuid}::storage_group::${storage_group_uuid}::vg_size_on_dr"   => $anvil->data->{anvil_resources}{$anvil_uuid}{storage_group}{$storage_group_uuid}{vg_size_on_dr}." (".$anvil->Convert->bytes_to_human_readable({'bytes' => $anvil->data->{anvil_resources}{$anvil_uuid}{storage_group}{$storage_group_uuid}{vg_size_on_dr}}).")",
			"anvil_resources::${anvil_uuid}::storage_group::${storage_group_uuid}::available_on_dr" => $anvil->data->{anvil_resources}{$anvil_uuid}{storage_group}{$storage_group_uuid}{available_on_dr}." (".$anvil->Convert->bytes_to_human_readable({'bytes' => $anvil->data->{anvil_resources}{$anvil_uuid}{storage_group}{$storage_group_uuid}{available_on_dr}}).")",
		}});
		
		# Make it easy to sort by group name
		my $storage_group_name = $anvil->data->{anvil_resources}{$anvil_uuid}{storage_group}{$storage_group_uuid}{group_name};
		$anvil->data->{anvil_resources}{$anvil_uuid}{storage_group_name}{$storage_group_name}{storage_group_uuid} = $storage_group_uuid;
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
			"anvil_resources::${anvil_uuid}::storage_group_name::${storage_group_name}::storage_group_uuid" => $anvil->data->{anvil_resources}{$anvil_uuid}{storage_group_name}{$storage_group_name}{storage_group_uuid},
		}});
	}
	
	return(0);
}


=head2 bridges

This finds a list of bridges on the host. Bridges that are found are stored in;

* <host>::network::bridges::bridge::<bridge_name>::found                            = 1
* <host>::network::bridges::bridge::<bridge_name>::flags                            = [array of flags]
* <host>::network::bridges::bridge::<bridge_name>::connected_interface::<interface> = 1
* <host>::network::bridges::bridge::<bridge_name>::<variable>                       = [array reference or string variable]
* <host>::network::bridges::interface::<interface_name>::<variable>                 = [array reference or string variable]

Where 'host' is C<< Get->short_host_name() >>. 

This method takes no parameters.

=cut
sub bridges
{
	my $self      = shift;
	my $parameter = shift;
	my $anvil     = $self->parent;
	my $debug     = defined $parameter->{debug} ? $parameter->{debug} : 3;
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => $debug, key => "log_0125", variables => { method => "Get->bridges()" }});
	
	my ($output, $return_code) = $anvil->System->call({shell_call => $anvil->data->{path}{exe}{bridge}." -json -details link show"});
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
		output      => $output,
		return_code => $return_code, 
	}});
	
	# Delete any previously known data
	my $host = $anvil->Get->short_host_name();
	if (exists $anvil->data->{$host}{network}{bridges})
	{
		delete $anvil->data->{$host}{network}{bridges};
	};
	
	local $@;
	my $bridge_data = "";
	my $json        = JSON->new->allow_nonref;
	my $test        = eval { $bridge_data = $json->decode($output); };
	if (not $test)
	{
		# JSON parse failed.
		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 2, key => "error_0140", variables => { 
			json  => $output,
			error => $@,
		}});
		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 2, key => "log_0519"});
		
		# NOTE: This is not design to be normally used. It was created as a stop-gap while waiting 
		#       for resolution on: https://bugzilla.redhat.com/show_bug.cgi?id=1868467
		my ($output, $return_code) = $anvil->System->call({shell_call => $anvil->data->{path}{exe}{bridge}." -details link show"});
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
			output      => $output,
			return_code => $return_code, 
		}});
		my $interface = "";
		my $type      = "";
		foreach my $line (split/\n/, $output)
		{
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { line => $line }});
			if ($line =~ /^\d+:\s+(.*?):/)
			{
				$interface = $1;
				$type      = "";
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
					interface => $interface,
					type      => $type, 
				}});
				
				$anvil->data->{$host}{network}{bridges}{bridge}{$interface}{found} = 1;
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
					"${host}::network::bridges::bridge::${interface}::found" => $anvil->data->{$host}{network}{bridges}{bridge}{$interface}{found}, 
				}});
			}
			if ($interface)
			{
				if (($line =~ /master (.*?) /) or ($line =~ /master (.*?)$/))
				{
					my $master_bridge = $1;
					$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { master_bridge => $master_bridge }});
					
					if ($master_bridge eq $interface)
					{
						# This is the bridge
						$type = "bridge";
						$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { type => $type }});
					}
					else
					{
						# It's an interface, store it under the bridge.
						$type                                                                                            = "interface";
						$anvil->data->{$host}{network}{bridges}{bridge}{$master_bridge}{connected_interface}{$interface} = 1;
						$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
							type                                                                                     => $type,
							"${host}::network::bridges::bridge::${master_bridge}::connected_interface::${interface}" => $anvil->data->{$host}{network}{bridges}{bridge}{$master_bridge}{connected_interface}{$interface}, 
						}});
					}
				}
			}
			
			if (($interface) && ($type))
			{
				if ($line =~ /<(.*?)>/)
				{
					my $flags = $1;
					$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { flags => $flags }});
					
					my $i = 0;
					foreach my $flag (split/,/, $flags)
					{
						$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { flag => $flag }});
						push @{$anvil->data->{$host}{network}{bridges}{$type}{$interface}{flags}}, $flag;
					}
				}
			}
			if ($line =~ /^\s+(.*?)$interface/)
			{
				# Break out settings.
				my $values = $1;
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 'values' => $values }});
				
				my $variable = "";
				foreach my $word (split/ /, $values)
				{
					if (($variable) && (($word eq "on") or ($word eq "off")))
					{
						my $value = $word;
						$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { value => $value }});
						
						$anvil->data->{$host}{network}{bridges}{$type}{$interface}{$variable} = $value eq "on" ? "true" : "false";
						$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
							"${host}::network::bridges::${type}::${interface}::${variable}" => $anvil->data->{$host}{network}{bridges}{$type}{$interface}{$variable}, 
						}});
						$variable = "";
					}
					else
					{
						$variable = $word;
						$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { variable => $variable }});
					}
				}
			}
		}
	}
	else
	{
		foreach my $hash_ref (@{$bridge_data})
		{
			# If the ifname and master are the same, it's a bridge.
			my $type          = "interface";
			my $interface     = $hash_ref->{ifname};
			my $master_bridge = $hash_ref->{master};
			if ($interface eq $master_bridge)
			{
				$type = "bridge";
				$anvil->data->{$host}{network}{bridges}{bridge}{$interface}{found} = 1;
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
					"${host}::network::bridges::bridge::${interface}::found" => $anvil->data->{$host}{network}{bridges}{bridge}{$interface}{found}, 
				}});
			}
			else
			{
				# Store this interface under the bridge.
				$anvil->data->{$host}{network}{bridges}{bridge}{$master_bridge}{connected_interface}{$interface} = 1;
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
					"${host}::network::bridges::bridge::${master_bridge}::connected_interface::${interface}" => $anvil->data->{$host}{network}{bridges}{bridge}{$master_bridge}{connected_interface}{$interface}, 
				}});
			}
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
				interface     => $interface,
				master_bridge => $master_bridge, 
				type          => $type, 
			}});
			foreach my $key (sort {$a cmp $b} keys %{$hash_ref})
			{
				if (ref($hash_ref->{$key}) eq "ARRAY")
				{
					$anvil->data->{$host}{network}{bridges}{$type}{$interface}{$key} = [];
					foreach my $value (sort {$a cmp $b} @{$hash_ref->{$key}})
					{
						push @{$anvil->data->{$host}{network}{bridges}{$type}{$interface}{$key}}, $value;
					}
					for (my $i = 0; $i < @{$anvil->data->{$host}{network}{bridges}{$type}{$interface}{$key}}; $i++)
					{
						$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
							"${host}::network::bridges::${type}::${interface}::${key}->[$i]" => $anvil->data->{$host}{network}{bridges}{$type}{$interface}{$key}->[$i], 
						}});
					}
				}
				else
				{
					$anvil->data->{$host}{network}{bridges}{$type}{$interface}{$key} = $hash_ref->{$key};
					$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
						"${host}::network::bridges::${type}::${interface}::${key}" => $anvil->data->{$host}{network}{bridges}{$type}{$interface}{$key}, 
					}});
				}
			}
		}
	}
	
	# Summary of found bridges.
	foreach my $interface (sort {$a cmp $b} keys %{$anvil->data->{$host}{network}{bridges}{bridge}})
	{
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
			"${host}::network::bridges::bridge::${interface}::found" => $anvil->data->{$host}{network}{bridges}{bridge}{$interface}{found}, 
		}});
	}
	
	return(0);
}

=head2 cgi

This reads in the CGI variables passed in by a form or URL.

This method takes no parameters.

=cut
sub cgi
{
	my $self      = shift;
	my $parameter = shift;
	my $anvil     = $self->parent;
	my $debug     = defined $parameter->{debug} ? $parameter->{debug} : 3;
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => $debug, key => "log_0125", variables => { method => "Get->cgi()" }});
	
	# This will store all of the CGI variables.
	$anvil->data->{sys}{cgi_string} = "?";
	
	# Needed to read in passed CGI variables
	my $cgi = CGI->new();
	
	my $cgis      = [];
	my $cgi_count = 0;
	# Get the list of parameters coming in, if possible, 
	if (exists $cgi->{param})
	{
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 'cgi->{param}' => $cgi->{param} }});
		foreach my $variable (sort {$a cmp $b} keys %{$cgi->{param}})
		{
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { variable => $variable }});
			push @{$cgis}, $variable;
		}
	}
	
	$cgi_count = @{$cgis};
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { cgi_count => $cgi_count }});
	
	# If we don't have at least one variable, we're done.
	if ($cgi_count < 1)
	{
		return(0);
	}
	
	# NOTE: Later, we will have another array for handling file uploads.
	# Now read in the variables.
	foreach my $variable (sort {$a cmp $b} @{$cgis})
	{
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { variable => $variable }});
		
		$anvil->data->{cgi}{$variable}{value}       = "";
		$anvil->data->{cgi}{$variable}{mime_type}   = "string";
		$anvil->data->{cgi}{$variable}{file_handle} = "";
		$anvil->data->{cgi}{$variable}{file_name}   = "";
		$anvil->data->{cgi}{$variable}{alert}       = 0;	# This is set if a sanity check fails
		
		# This is a special CGI key for download files (upload from the user's perspective)
		if ($variable eq "upload_file")
		{
			if (not $cgi->upload('upload_file'))
			{
				# Empty file passed, looks like the user forgot to select a file to upload.
				$anvil->Log->entry({log_level => 2, message_key => "log_0242", file => $THIS_FILE, line => __LINE__});
			}
			else
			{
				   $anvil->data->{cgi}{upload_file}{file_handle} = $cgi->upload('upload_file');
				my $file                                         = $anvil->data->{cgi}{upload_file}{file_handle};
				   $anvil->data->{cgi}{upload_file}{file_name}   = $file;
				   $anvil->data->{cgi}{upload_file}{mime_type}   = $cgi->uploadInfo($file)->{'Content-Type'};
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
					variable                                => 'upload_file',
					"cgi::${variable}::file_handle"         => $anvil->data->{cgi}{upload_file}{file_handle},
					"cgi::${variable}::file_handle->handle" => $anvil->data->{cgi}{upload_file}{file_handle}->handle,
					"cgi::${variable}::file_name"           => $anvil->data->{cgi}{upload_file}{file_name},
					"cgi::${variable}::mime_type"           => $anvil->data->{cgi}{upload_file}{mime_type},
					"cgi->upload('upload_file')"            => $cgi->upload('upload_file'),
					"cgi->upload('upload_file')->handle"    => $cgi->upload('upload_file')->handle,
				}});
			}
		}
		
		if (defined $cgi->param($variable))
		{
			# Make this UTF8 if it isn't already.
			if (Encode::is_utf8($cgi->param($variable)))
			{
				$anvil->data->{cgi}{$variable}{value} = $cgi->param($variable);
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { "cgi::${variable}::value" => $anvil->data->{cgi}{$variable}{value} }});
			}
			else
			{
				$anvil->data->{cgi}{$variable}{value} = Encode::decode_utf8($cgi->param($variable));
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { "cgi::${variable}::value" => $anvil->data->{cgi}{$variable}{value} }});
			}
			
			# Append to 'sys::cgi_string', so long as the variable doesn't have 'passwd' or 'password' in it.
			if (($variable !~ /password/) && ($variable !~ /passwd/))
			{
				$anvil->data->{sys}{cgi_string} .= "$variable=".$anvil->data->{cgi}{$variable}{value}."&";
			}
		}
	}
	
	# This is a pretty way of displaying the passed-in CGI variables. It loops through all we've got and
	# sorts out the longest variable name. Then it loops again, appending '.' to shorter ones so that 
	# everything is lined up in the logs. This almost always prints, save for log level 0.
	if ($anvil->Log->level >= 1)
	{
		my $longest_variable = 0;
		foreach my $variable (sort {$a cmp $b} keys %{$anvil->data->{cgi}})
		{
			next if $anvil->data->{cgi}{$variable} eq "";
			if (length($variable) > $longest_variable)
			{
				$longest_variable = length($variable);
			}
		}
		
		# Now loop again.
		foreach my $variable (@{$cgis})
		{
			next if $anvil->data->{cgi}{$variable} eq "";
			my $difference   = $longest_variable - length($variable);
			my $say_value    = "value";
			if ($difference == 0)
			{
				# Do nothing
			}
			elsif ($difference == 1) 
			{
				$say_value .= " ";
			}
			elsif ($difference == 2) 
			{
				$say_value .= "  ";
			}
			else
			{
				my $dots      =  $difference - 2;
				   $say_value .= " ";
				for (1 .. $dots)
				{
					$say_value .= ".";
				}
				$say_value .= " ";
			}
			# This is always '1' as the passed-in variables are what we want to see.
			my $censored_value = $anvil->data->{cgi}{$variable}{value};
			if ((($variable =~ /passwd/) or ($variable =~ /password/)) && (not $anvil->Log->secure))
			{
				# This is a password and we're not logging sensitive data, obfuscate it.
				$censored_value = $anvil->Words->string({key => "log_0186"});
			}
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
				"cgi::${variable}::$say_value" => $censored_value,
			}});
		}
	}
	
	# Clear the last &
	$anvil->data->{sys}{cgi_string} =~ s/&$//;
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { "sys::cgi_string" => $anvil->data->{sys}{cgi_string} }});
	
	return(0);
}

=head2 date_and_time

This method returns the date and/or time using either the current time, or a specified unix time.

NOTE: This only returns times in 24-hour notation.

=head2 Parameters;

=head3 date_only (optional)

If set, only the date will be returned (in C<< yyyy/mm/dd >> format).

=head3 file_name (optional)

When set, the date and/or time returned in a string more useful in file names. Specifically, it will replace spaces with 'C<< _ >>' and 'C<< : >>' and 'C<< / >>' for 'C<< - >>'. This will result in a string in the format like 'C<< yyyy-mm-dd_hh-mm-ss >>'.

=head3 offset (optional)

If set to a signed number, it will add or subtract the number of seconds from the 'C<< use_time >>' before processing.

=head3 use_time (optional)

This can be set to a unix timestamp. If it is not set, the current time is used.

=head3 time_only (optional)

If set, only the time will be returned (in C<< hh:mm:ss >> format).

=head3 use_utc (optional)

If set, C<< gmtime >> is used instead of C<< localtime >>. The effect of this is that GMTime (greenwhich mean time, UTC-0) is used instead of the local system's time zone.

=cut
sub date_and_time
{
	my $self      = shift;
	my $parameter = shift;
	my $anvil     = $self->parent;
	my $debug     = defined $parameter->{debug} ? $parameter->{debug} : 3;
	
	my $offset    = defined $parameter->{offset}    ? $parameter->{offset}    : 0;
	my $use_time  = defined $parameter->{use_time}  ? $parameter->{use_time}  : time;
	my $use_utc   = defined $parameter->{use_utc}   ? $parameter->{use_utc}   : 0;
	my $file_name = defined $parameter->{file_name} ? $parameter->{file_name} : 0;
	my $time_only = defined $parameter->{time_only} ? $parameter->{time_only} : 0;
	my $date_only = defined $parameter->{date_only} ? $parameter->{date_only} : 0;
	
	### NOTE: This is used too early for normal error handling.
	# Are things sane?
	if ($use_time =~ /D/)
	{
		die "Get->date_and_time() was called with 'use_time' set to: [$use_time]. Only a unix timestamp is allowed.\n";
	}
	if ($offset =~ /D/)
	{
		die "Get->date_and_time() was called with 'offset' set to: [$offset]. Only real number is allowed.\n";
	}
	
	# Do my initial calculation.
	my $return_string = "";
	my $time          = {};
	my $adjusted_time = $use_time + $offset;
	#print $THIS_FILE." ".__LINE__."; [ Debug ] - adjusted_time: [$adjusted_time]\n";
	
	# Get the date and time pieces
	if ($use_utc)
	{
		($time->{sec}, $time->{min}, $time->{hour}, $time->{mday}, $time->{mon}, $time->{year}, $time->{wday}, $time->{yday}, $time->{isdst}) = gmtime($adjusted_time);
		#print $THIS_FILE." ".__LINE__."; [ Debug ] - time->{sec}: [".$time->{sec}."], time->{min}: [".$time->{min}."], time->{hour}: [".$time->{hour}."], time->{mday}: [".$time->{mday}."], time->{mon}: [".$time->{mon}."], time->{year}: [".$time->{year}."], time->{wday}: [".$time->{wday}."], time->{yday}: [".$time->{yday}."], time->{isdst}: [".$time->{isdst}."]\n";
	}
	else
	{
		($time->{sec}, $time->{min}, $time->{hour}, $time->{mday}, $time->{mon}, $time->{year}, $time->{wday}, $time->{yday}, $time->{isdst}) = localtime($adjusted_time);
		#print $THIS_FILE." ".__LINE__."; [ Debug ] - time->{sec}: [".$time->{sec}."], time->{min}: [".$time->{min}."], time->{hour}: [".$time->{hour}."], time->{mday}: [".$time->{mday}."], time->{mon}: [".$time->{mon}."], time->{year}: [".$time->{year}."], time->{wday}: [".$time->{wday}."], time->{yday}: [".$time->{yday}."], time->{isdst}: [".$time->{isdst}."]\n";
	}
	
	# Process the raw data
	$time->{pad_hour} = sprintf("%02d", $time->{hour});
	$time->{mon}++;
	$time->{pad_min}  = sprintf("%02d", $time->{min});
	$time->{pad_sec}  = sprintf("%02d", $time->{sec});
	$time->{year}     = ($time->{year} + 1900);
	$time->{pad_mon}  = sprintf("%02d", $time->{mon});
	$time->{pad_mday} = sprintf("%02d", $time->{mday});
	#print $THIS_FILE." ".__LINE__."; [ Debug ] - time->{pad_hour}: [".$time->{pad_hour}."], time->{pad_min}: [".$time->{pad_min}."], time->{pad_sec}: [".$time->{pad_sec}."], time->{year}: [".$time->{year}."], time->{pad_mon}: [".$time->{pad_mon}."], time->{pad_mday}: [".$time->{pad_mday}."], time->{mon}: [".$time->{mon}."]\n";
	
	# Now, the date and time separator depends on if 'file_name' is set.
	my $date_separator  = $file_name ? "-" : "/";
	my $time_separator  = $file_name ? "-" : ":";
	my $space_separator = $file_name ? "_" : " ";
	if ($time_only)
	{
		$return_string = $time->{pad_hour}.$time_separator.$time->{pad_min}.$time_separator.$time->{pad_sec};
		#print $THIS_FILE." ".__LINE__."; [ Debug ] - return_string: [$return_string]\n";
	}
	elsif ($date_only)
	{
		$return_string = $time->{year}.$date_separator.$time->{pad_mon}.$date_separator.$time->{pad_mday};
		#print $THIS_FILE." ".__LINE__."; [ Debug ] - return_string: [$return_string]\n";
	}
	else
	{
		$return_string = $time->{year}.$date_separator.$time->{pad_mon}.$date_separator.$time->{pad_mday}.$space_separator.$time->{pad_hour}.$time_separator.$time->{pad_min}.$time_separator.$time->{pad_sec};
		#print $THIS_FILE." ".__LINE__."; [ Debug ] - return_string: [$return_string]\n";
	}
	
	return($return_string);
}


=head2 domain_name

This returns the domain name portion of the local system's host name. That is to say, the host name after the first C<< . >>. If there is no domain portion, nothing is returned.

This method takes no parameters.

=cut
sub domain_name
{
	### NOTE: This method doesn't offer logging.
	my $self  = shift;
	my $anvil = $self->parent;
	
	my $domain_name =  $anvil->Get->host_name;
	   $domain_name =~ s/^.*?\.//;
	   $domain_name =  "" if not defined $domain_name;
	
	return($domain_name);
}


=head2 host_from_ip_address

This takes an IP address and looks for the host that has the IP. If the given IP is not in the database (or was but is deleted now), an empty string is returned. Otherwise, the host name and host UUID are returned.

 my ($host_uuid, $host_name) = $anvil->Get->host_from_ip_address({ip_address => "10.201.10.1"});

Parameters;

=head3 host_from_ip_address (required) 

This is the IP address being converted.

=cut
sub host_from_ip_address
{
	my $self      = shift;
	my $parameter = shift;
	my $anvil     = $self->parent;
	my $debug     = defined $parameter->{debug} ? $parameter->{debug} : 3;
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => $debug, key => "log_0125", variables => { method => "Get->host_from_ip_address()" }});
	
	my $host_uuid  = "";
	my $host_name  = "";
	my $ip_address = defined $parameter->{ip_address} ? $parameter->{ip_address} : "";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
		ip_address => $ip_address,
	}});
	
	if (not $ip_address)
	{
		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 0, priority => "err", key => "log_0020", variables => { method => "Get->host_from_ip_address()", parameter => "ip_address" }});
		return($host_uuid, $host_name);
	}
	if (not $anvil->Validate->ipv4({ip => $ip_address}))
	{
		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 0, priority => "err", key => "warning_0010", variables => { ip_address => $ip_address }});
		return($host_uuid, $host_name);
	}
	
	my $query = "
SELECT 
    a.host_uuid, 
    a.host_name 
FROM 
    hosts a, 
    ip_addresses b 
WHERE 
    a.host_uuid          =  b.ip_address_host_uuid 
AND 
    a.host_key           != 'DELETED' 
AND 
    b.ip_address_note    != 'DELETED' 
AND 
    b.ip_address_address =  ".$anvil->Database->quote($ip_address)."
;";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { query => $query }});
	my $results = $anvil->Database->query({query => $query, source => $THIS_FILE, line => __LINE__});
	my $count   = @{$results};
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
		results => $results, 
		count   => $count, 
	}});
	if ($count == 1)
	{
		# Found it
		$host_uuid = defined $results->[0]->[0] ? $results->[0]->[0] : "";
		$host_name = defined $results->[0]->[1] ? $results->[0]->[1] : "";
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
			host_uuid => $host_uuid,
			host_name => $host_name,
		}});
	}
	
	return($host_uuid, $host_name);
}


=head2 host_name

This returns the full host name for the local machine.

This method takes no parameters.

=cut
sub host_name
{
	### NOTE: This method doesn't offer logging.
	my $self  = shift;
	my $anvil = $self->parent;
	
	my $host_name = "";
	# NOTE: Don't use 'ENV{HOSTNAME}'! It lags behind changes made by 'hostnamectl'.
	if ($anvil->data->{sys}{host_name})
	{
		# We have an environment variable, so use it.
		$host_name = $anvil->data->{sys}{host_name};
	}
	else
	{
		# The environment variable isn't set. Call 'hostnamectl' on the command line.
		($host_name, my $return_code) = $anvil->System->call({debug => 9999, shell_call => $anvil->data->{path}{exe}{hostnamectl}." --static"});
		if ($return_code)
		{
			# We can't trust the hostname. This could be an error like "Could not get property: 
			# Refusing activation, D-Bus is shutting down.". Try reading in the '/etc/hostname'
			# file instead.
			$host_name = $anvil->Storage->read_file({debug => 9999, file => $anvil->data->{path}{configs}{hostname}});
			if ($host_name eq "!!error!!")
			{
				# Failed to read the file, too. What the hell? Exit out.
				print "Failed to query the hostname using 'hostnamectl --static' and failed to read the content of: [".$anvil->data->{path}{configs}{hostname}."]. Something is very wrong, exiting.\n";
			}
		}
		else
		{
			# Cache the answer
			$anvil->data->{sys}{host_name} = $host_name;
		}
	}
	
	return($host_name);
}


=head2 host_name_from_uuid

This takes a host UUID and returns the host name (as recorded in the C<< hosts >> table). If the entry is not found, an empty string is returned.

 my $host_name = $anvil->Get->host_name_from_uuid({host_uuid => "8da3d2fe-783a-4619-abb5-8ccae58f7bd6"});

Parameters;

=head3 host_uuid (required)

This is the C<< host_uuid >> to translate into a host name.

=cut
sub host_name_from_uuid
{
	my $self      = shift;
	my $parameter = shift;
	my $anvil     = $self->parent;
	my $debug     = defined $parameter->{debug} ? $parameter->{debug} : 3;
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => $debug, key => "log_0125", variables => { method => "Get->host_name_from_uuid()" }});
	
	my $host_name = "";
	my $host_uuid = defined $parameter->{host_uuid} ? $parameter->{host_uuid} : "";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { host_uuid => $host_uuid }});
	
	my $query = "
SELECT 
    host_name 
FROM 
    hosts 
WHERE 
    host_uuid = ".$anvil->Database->quote($host_uuid).";
";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { query => $query }});
	my $results = $anvil->Database->query({query => $query, source => $THIS_FILE, line => __LINE__});
	my $count   = @{$results};
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
		results => $results, 
		count   => $count, 
	}});
	if ($count == 1)
	{
		# Found it
		$host_name = defined $results->[0]->[0] ? $results->[0]->[0] : "";
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { host_name => $host_name }});
	}
	
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { host_name => $host_name }});
	return($host_name);
}


=head2 host_uuid_from_name

This takes a host name and looks for a UUID from the C<< hosts >> table). If the entry is not found, an empty string is returned.

 my $host_uuid = $anvil->Get->host_uuid_from_name({host_name => "an-a02n01.alteeve.com"});

Parameters;

=head3 host_name (required)

This is the host name to translate into a C<< host_uuid >>. If an exact match isn't found, the short host name will be used to try to find a match.

=cut
sub host_uuid_from_name
{
	my $self      = shift;
	my $parameter = shift;
	my $anvil     = $self->parent;
	my $debug     = defined $parameter->{debug} ? $parameter->{debug} : 3;
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => $debug, key => "log_0125", variables => { method => "Get->host_uuid_from_name()" }});
	
	my $host_uuid = "";
	my $host_name = defined $parameter->{host_name} ? $parameter->{host_name} : "";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { host_name => $host_name }});
	
	my $short_host_name =  $host_name;
	   $short_host_name =~ s/\..*$//;
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { short_host_name => $short_host_name }});
	
	# We use Database->get_hosts(), first looping for an exact match. If that fails, we'll loop again, 
	# reducing all host names to short version.
	$anvil->Database->get_hosts({debug => 2});
	
	if (exists $anvil->data->{sys}{hosts}{by_name}{$host_name})
	{
		$host_uuid = $anvil->data->{sys}{hosts}{by_name}{$host_name};
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { host_uuid => $host_uuid }});
	}
	else
	{
		foreach my $this_host_uuid (keys %{$anvil->data->{hosts}{host_uuid}})
		{
			my $this_host_name       = $anvil->data->{hosts}{host_uuid}{$this_host_uuid}{host_name};
			my $this_short_host_name = $this_host_name;
			   $this_short_host_name =~ s/\..*$//;
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
				this_host_name       => $this_host_name,
				this_short_host_name => $this_short_host_name, 
			}});
			
			if ($host_name eq $this_host_name)
			{
				# Found it.
				$host_uuid = $this_host_uuid;
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { host_uuid => $host_uuid }});
				last;
			}
			elsif ($short_host_name eq $this_short_host_name)
			{
				# This is probably it, but we'll keep looping to be sure.
				$host_uuid = $this_host_uuid;
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { host_uuid => $host_uuid }});
			}
		}
	}
	
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { host_uuid => $host_uuid }});
	return($host_uuid);
}


=head2 free_memory

This returns, in bytes, host much free memory is available on the local system.

=cut
### TODO: Make this work on remote systems.
sub free_memory
{
	my $self      = shift;
	my $parameter = shift;
	my $anvil     = $self->parent;
	my $debug     = defined $parameter->{debug} ? $parameter->{debug} : 3;
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => $debug, key => "log_0125", variables => { method => "Get->free_memory()" }});
	
	my $available               = 0;
	my ($free_output, $free_rc) = $anvil->System->call({shell_call =>  $anvil->data->{path}{exe}{free}." --bytes"});
	foreach my $line (split/\n/, $free_output)
	{
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { line => $line }});
		if ($line =~ /Mem:\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)$/)
		{
			my $total     = $1;
			my $used      = $2;
			my $free      = $3;
			my $shared    = $4;
			my $cache     = $5;
			   $available = $6;
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
				total     => $total." (".$anvil->Convert->bytes_to_human_readable({'bytes' => $total})."})", 
				used      => $used." (".$anvil->Convert->bytes_to_human_readable({'bytes' => $used})."})",
				free      => $free." (".$anvil->Convert->bytes_to_human_readable({'bytes' => $free})."})", 
				shared    => $shared." (".$anvil->Convert->bytes_to_human_readable({'bytes' => $shared})."})", 
				cache     => $cache." (".$anvil->Convert->bytes_to_human_readable({'bytes' => $cache})."})", 
				available => $available." (".$anvil->Convert->bytes_to_human_readable({'bytes' => $available})."})", 
			}});
		}
	}
	
	return($available);
}

=head2 host_type

This method tries to determine the host type and returns a value suitable for use is the C<< hosts >> table. Returned values are;

 striker - Striker dashboards
 node    - Anvil! nodes (active protection of VMs)
 dr      - DR Hosts (passive DR host targets)

 my $type = $anvil->Get->host_type();

First, it looks to see if C<< sys::host_type >> is set and, if so, uses that string as it is. 

If that isn't set, it then looks to see if the file C<< /etc/anvil/type.X >> exists, where C<< X >> is C<< node >>, C<< striker >> or C<< dr >>. If found, the appropriate type is returned.

If that file doesn't exist, then it then checks to see which C<< anvil-<type> >> rpm is installed. In order, it looks for C<< anvil-striker >>, then C<< anvil-node >> and finally C<< anvil-dr >>. If one of them is found, the appropriate C<< /etc/anvil/type.X >> is created.

=cut
sub host_type
{
	my $self      = shift;
	my $parameter = shift;
	my $anvil     = $self->parent;
	my $debug     = defined $parameter->{debug} ? $parameter->{debug} : 3;
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => $debug, key => "log_0125", variables => { method => "Get->host_type()" }});
	
	my $host_type = "";
	my $host_name = $anvil->Get->short_host_name;
	   $host_type = "unknown";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
		host_type        => $host_type,
		host_name        => $host_name,
		"sys::host_type" => $anvil->data->{sys}{host_type},
	}});

	if ($anvil->data->{sys}{host_type})
	{
		$host_type = $anvil->data->{sys}{host_type};
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { host_type => $host_type }});
	}
	else
	{
		# Can I determine it by seeing a file?
		if (-e $anvil->data->{path}{configs}{'type.node'})
		{
			$host_type = "node";
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { host_type => $host_type }});
		}
		elsif (-e $anvil->data->{path}{configs}{'type.striker'})
		{
			$host_type = "striker";
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { host_type => $host_type }});
		}
		elsif (-e $anvil->data->{path}{configs}{'type.dr'})
		{
			$host_type = "dr";
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { host_type => $host_type }});
		}
		else
		{
			# Last gasp here is to use 'rpm' to see which RPMs are installed. If we find one, 
			# we'll touch 'type.X' file
			my $check_types = {
				'striker' => 1,
				'node'    => 1,
				'dr'      => 1,
			};
			foreach my $rpm ("anvil-striker", "anvil-node", "anvil-dr")
			{
				my ($output, $return_code) = $anvil->System->call({
					debug      => $debug, 
					shell_call => $anvil->data->{path}{exe}{rpm}." -q ".$rpm,
				});
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { output => $output, return_code => $return_code }});
				if ($return_code eq "0")
				{
					# Found out what we are.
					if ($output =~ /anvil-(.*?)-/)
					{
						$host_type = $1;
						$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { host_type => $host_type }});
						
						$check_types->{$host_type} = 0;
						$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { "check_types->{$host_type}" => $check_types->{$host_type} }});
					}
					
					my $key  = "type.".$host_type;
					my $file = $anvil->data->{path}{configs}{$key};
					$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
						key  => $key,
						file => $file, 
					}});
					# If we have a file and we're root, touch to the file.
					if (($< == 0) or ($> == 0))
					{
						foreach my $test_type (sort {$a cmp $b} keys %{$check_types})
						{
							my $test_key  = "type.".$test_type;
							my $test_file = $anvil->data->{path}{configs}{$test_key};
							$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
								"check_types->{$test_type}" => $check_types->{$test_type},
								test_file                   => $test_file,
							}});
							
							if (($check_types->{$test_type}) && (-e $test_file))
							{
								# Remove the old type.
								$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 1, key => "log_0497", variables => { file => $test_file }});
								unlink $test_file;
							}
						}
						if ($file)
						{
							my $error = $anvil->Storage->write_file({
								debug => $debug,
								body  => "",
								file  => $file,
							});
							$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { error => $error }});
						}
					}
					last;
				}
			}
		}
	}
	
	return($host_type);
}

=head2 host_uuid

This returns the local host's system UUID (as reported by 'dmidecode'). If the host UUID isn't available, and the program is not running with root priviledges, C<< #!error!# >> is returned.

 print "This host's UUID: [".$anvil->Get->host_uuid."]\n";

It is possible to override the local UUID, though it is not recommended.

 $anvil->Get->host_uuid({set => "720a0509-533d-406b-8fc1-03aca3e75fa7"})

=cut
sub host_uuid
{
	my $self      = shift;
	my $parameter = shift;
	my $anvil     = $self->parent;
	my $debug     = defined $parameter->{debug} ? $parameter->{debug} : 3;
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => $debug, key => "log_0125", variables => { method => "Get->host_uuid()" }});
	
	my $set = defined $parameter->{set} ? $parameter->{set} : "";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
		set          => $set,
		'HOST::UUID' => $anvil->{HOST}{UUID}, 
	}});
	
	if ($set)
	{
		$anvil->{HOST}{UUID} = $set;
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { "HOST::UUID" => $anvil->{HOST}{UUID} }});
	}
	elsif (not $anvil->{HOST}{UUID})
	{
		# Read /etc/anvil/host.uuid if it exists. If not, and if we're root, we'll create that file 
		# using the UUID from dmidecode.
		my $uuid = "";
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
			'$<'                    => $<, 
			'$>'                    => $>,
			'path::data::host_uuid' => $anvil->data->{path}{data}{host_uuid}, 
		}});
		if (-e $anvil->data->{path}{data}{host_uuid})
		{
			# Read the UUID in
			$uuid = $anvil->Storage->read_file({debug => $debug, file => $anvil->data->{path}{data}{host_uuid}});
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { uuid => $uuid }});
		}
		elsif (($< == 0) or ($> == 0))
		{
			# Create the UUID file.
			($uuid, my $return_code) = $anvil->System->call({debug => $debug, shell_call => $anvil->data->{path}{exe}{dmidecode}." --string system-uuid"});
			$uuid = lc($uuid);
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
				uuid        => $uuid, 
				return_code => $return_code,
			}});
		}
		else
		{
			# Host UUID file doesn't exist and I'm Not running as root, I'm done.
			# We're done.
			$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 0, priority => "err", key => "log_0187"});
			return("#!error!#");
		}
		
		if ($anvil->Validate->uuid({uuid => $uuid}))
		{
			$anvil->{HOST}{UUID} = $uuid;
			if (not -e $anvil->data->{path}{data}{host_uuid})
			{
				### TODO: This will need to set the proper SELinux context.
				# Apache run scripts can't call the system UUID, so we'll write it to a text
				# file.
				$anvil->Storage->write_file({
					debug     => $debug, 
					file      => $anvil->data->{path}{data}{host_uuid}, 
					body      => $uuid,
					user      => "apache", 
					group     => "apache",
					mode      => "0666",
					overwrite => 0,
				});
				$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 1, key => "message_0011", variables => { file => $anvil->data->{path}{data}{host_uuid} }});
			}
		}
		else
		{
			# Bad UUID.
			$anvil->{HOST}{UUID} = "";
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { "HOST::UUID" => $anvil->{HOST}{UUID} }});
			
			$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 0, priority => "err", key => "log_0134", variables => { uuid => $uuid }});
			return("#!error!#");
		}
	}
	
	# We'll also store the host UUID in a variable.
	if ((not $anvil->data->{sys}{host_uuid}) && ($anvil->{HOST}{UUID}))
	{
		$anvil->data->{sys}{host_uuid} = $anvil->{HOST}{UUID};
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { "sys::host_uuid" => $anvil->data->{sys}{host_uuid} }});
	}
	
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { "HOST::UUID" => $anvil->{HOST}{UUID} }});
	return($anvil->{HOST}{UUID});
}


=head2 kernel_release

This returns the kernel release (same output as C<<uname -r>>) on the local or remote host. If there is a problem, C<< !!error!! >> is returned.

Parameters;

=head3 password (optional)

This is the password to use when connecting to a remote machine. If not set, but C<< target >> is, an attempt to connect without a password will be made.

=head3 port (optional)

This is the TCP port to use when connecting to a remote machine. If not set, but C<< target >> is, C<< 22 >> will be used.

=head3 remote_user (optional, default root)

If C<< target >> is set, this will be the user we connect to the remote machine as.

=head3 target (optional)

This is the IP or host name of the machine to read the kernel release. If this is not set, the local system's kernel release is checked.

=cut
sub kernel_release
{
	my $self      = shift;
	my $parameter = shift;
	my $anvil     = $self->parent;
	my $debug     = defined $parameter->{debug} ? $parameter->{debug} : 3;
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => $debug, key => "log_0125", variables => { method => "System->kernel_release()" }});
	
	my $password    = defined $parameter->{password}    ? $parameter->{password}    : "";
	my $port        = defined $parameter->{port}        ? $parameter->{port}        : "";
	my $remote_user = defined $parameter->{remote_user} ? $parameter->{remote_user} : "root";
	my $target      = defined $parameter->{target}      ? $parameter->{target}      : "";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
		target      => $target, 
		port        => $port, 
		remote_user => $remote_user, 
		password    => $anvil->Log->is_secure($password), 
	}});
	
	my $kernel_release = "";
	my $return_code    = "";
	my $shell_call     = $anvil->data->{path}{exe}{uname}." --kernel-release";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { shell_call => $shell_call }});
	if ($anvil->Network->is_local({host => $target}))
	{
		# Local call
		($kernel_release, $return_code) = $anvil->System->call({debug => $debug, shell_call => $shell_call});
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
			kernel_release => $kernel_release, 
			return_code    => $return_code,
		}});
	}
	else
	{
		# Remote call
		($kernel_release, my $error, $return_code) = $anvil->Remote->call({
			debug       => $debug, 
			shell_call  => $shell_call, 
			target      => $target,
			port        => $port, 
			password    => $password,
			remote_user => $remote_user, 
		});
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
			kernel_release => $kernel_release, 
			error          => $error,
			return_code    => $return_code,
		}});
		
		if ($return_code)
		{
			$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 1, priority => "err", key => "error_0356", variables => {
				target      => $target, 
				output      => $kernel_release, 
				return_code => $return_code,
			}});
			$kernel_release = "!!error!!";
		}
	}
	
	return($kernel_release);
}


=head2 md5sum

This returns the C<< md5sum >> of a given file.

Parameters;

=head3 file

This is the full or relative path to the file. If the file doesn't exist, an empty string is returned.

=cut
sub md5sum
{
	my $self      = shift;
	my $parameter = shift;
	my $anvil     = $self->parent;
	my $debug     = defined $parameter->{debug} ? $parameter->{debug} : 3;
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => $debug, key => "log_0125", variables => { method => "Get->md5sum()" }});
	
	my $sum = "";
	my $file = defined $parameter->{file} ? $parameter->{file} : "";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { file => $file }});
	
	if (-e $file)
	{
		my $shell_call = $anvil->data->{path}{exe}{md5sum}." ".$file;
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { shell_call => $shell_call }});
		
		my ($return, $return_code) = $anvil->System->call({debug => $debug, shell_call => $shell_call});
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 'return' => $return, return_code => $return_code }});
		
		# split the sum off.
		$sum = ($return =~ /^(.*?)\s+$file$/)[0];
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { sum => $sum }});
	}
	
	return($sum);
}

=head2 os_type

This returns the operating system type and the system architecture as two separate string variables. This can be called on the local system, or against a remote system.

 # Run on RHEL 8, on a 64-bit system
 my ($os_type, $os_arch) = $anvil->Get->os_type();
 
 # '$os_type' holds 'rhel8'  ('rhel' or 'centos' + release version) 
 # '$os_arch' holds 'x86_64' (specifically, 'uname --hardware-platform')

If either can not be determined, C<< unknown >> will be returned.

Paramters;

=head3 password (optional)

If C<< target >> is set, this is the password used to log into the remote system as the C<< remote_user >>. If it is not set, an attempt to connect without a password will be made (though this will usually fail).

=head3 port (optional, default 22)

If C<< target >> is set, this is the TCP port number used to connect to the remote machine.

=head3 remote_user (optional, default 'root')

If C<< target >> is set, this is the user account that will be used when connecting to the remote system.

=head3 target (optional)

If set, the os type of the target machine is determined. This must be either an IP address or a resolvable host name. 

If not set, the local system's OS type is checked.

=cut
sub os_type
{
	my $self      = shift;
	my $parameter = shift;
	my $anvil     = $self->parent;
	my $debug     = defined $parameter->{debug} ? $parameter->{debug} : 3;
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => $debug, key => "log_0125", variables => { method => "Get->os_type()" }});
	
	my $os_type = "unknown";
	my $os_arch = "unknown";
	
	my $password    = defined $parameter->{password}    ? $parameter->{password}    : "";
	my $port        = defined $parameter->{port}        ? $parameter->{port}        : 22;
	my $remote_user = defined $parameter->{remote_user} ? $parameter->{remote_user} : "root";
	my $target      = defined $parameter->{target}      ? $parameter->{target}      : "";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
		password    => $anvil->Log->is_secure($password), 
		port        => $port, 
		remote_user => $remote_user, 
		target      => $target,
	}});
	
	### NOTE: Examples;
	# Red Hat Enterprise Linux release 8.0 Beta (Ootpa)
	# CentOS Stream release 8
	my $release = "";
	if ($target)
	{
		### NOTE: This can be called before 'rsync' is called, so we use 'cat'
		# Read in the /etc/redhat-release file
		($release, my $error, my $return_code) = $anvil->Remote->call({
			debug       => $debug, 
			shell_call  => $anvil->data->{path}{exe}{cat}." ".$anvil->data->{path}{data}{'redhat-release'}, 
			port        => $port, 
			password    => $password, 
			remote_user => $remote_user, 
			target      => $target,
		});
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
			release     => $release,
			error       => $error,
			return_code => $return_code, 
		}});
	}
	else
	{
		# Local call.
		$release = $anvil->Storage->read_file({debug => $debug, file => $anvil->data->{path}{data}{'redhat-release'}});
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { release => $release }});
	}
	if ($release =~ /Red Hat Enterprise Linux .* (\d+)\./)
	{
		# RHEL, with the major version number appended
		$os_type = "rhel".$1;
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { os_type => $os_type }});
	}
	elsif ($release =~ /CentOS Stream .*? (\d+)/)
	{
		$os_type = "centos-stream".$1;
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { os_type => $os_type }});
	}
	elsif ($release =~ /CentOS .*? (\d+)\./)
	{
		# CentOS, with the major version number appended
		$os_type = "centos".$1;
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { os_type => $os_type }});
	}
	
	my ($output, $return_code) = $anvil->System->call({shell_call => $anvil->data->{path}{exe}{uname}." --hardware-platform"});
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { output => $output, return_code => $return_code }});
	if ($output)
	{
		$os_arch = $output;
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { os_arch => $os_arch }});
	}
	
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
		os_type => $os_type, 
		os_arch => $os_arch,
	}});
	return($os_type, $os_arch);
}


=head2 server_uuid_from_name

This takes a server name and returns the server's uuid (as recorded in the C<< servers >> table). If the entry is not found, an empty string is returned. If there is a problem, C<< !!error!! >> will be returned.

Parameters;

=head3 anvil_uuid (optional)

If defined, only servers associated with the referenced Anvil! will be searched. This can help prevent situations where the same server name was used on different Anvil! systems.

=head3 server_name (required)

This is the C<< servers >> -> C<< server_name >> to translate into the server UUID.

=cut
sub server_uuid_from_name
{
	my $self      = shift;
	my $parameter = shift;
	my $anvil     = $self->parent;
	my $debug     = defined $parameter->{debug} ? $parameter->{debug} : 3;
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => $debug, key => "log_0125", variables => { method => "Get->server_uuid_from_name()" }});
	
	my $server_uuid = "";
	my $anvil_uuid  = defined $parameter->{anvil_uuid}  ? $parameter->{anvil_uuid}  : "";
	my $server_name = defined $parameter->{server_name} ? $parameter->{server_name} : "";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
		anvil_uuid  => $anvil_uuid,
		server_name => $server_name, 
	}});
	
	if (not $server_name)
	{
		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 0, priority => "err", key => "log_0020", variables => { method => "Get->server_uuid_from_name()", parameter => "server_name" }});
		return("!!error!!");
	}
	if ($anvil_uuid)
	{
		# Make sure the Anvil! UUID is valid. 
		my $anvil_name = $anvil->Get->anvil_name_from_uuid({debug => $debug, anvil_uuid => $anvil_uuid});
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { anvil_name => $anvil_name }});
		if ((not $anvil_name) or ($anvil_name eq "!!error!!"))
		{
			# Invalid anvil_uuid
			$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 0, priority => "err", key => "error_0162", variables => { anvil_uuid => $anvil_uuid }});
			return("!!error!!");
		}
	}
	
	my $query = "
SELECT 
    server_uuid 
FROM 
    servers 
WHERE 
    server_name = ".$anvil->Database->quote($server_name)." ";
	if ($anvil_uuid)
	{
		$query .= "
AND 
    server_anvil_uuid = ".$anvil->Database->quote($anvil_uuid)." ";
	}
	$query .= "
;";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { query => $query }});
	my $results = $anvil->Database->query({query => $query, source => $THIS_FILE, line => __LINE__});
	my $count   = @{$results};
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
		results => $results, 
		count   => $count, 
	}});
	if ($count == 1)
	{
		# Found it
		$server_uuid = defined $results->[0]->[0] ? $results->[0]->[0] : "";
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { server_uuid => $server_uuid }});
	}
	
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { server_uuid => $server_uuid }});
	return($server_uuid);
}


=head2 short_host_name

This returns the short host name for the machine this is running on. That is to say, the host name up to the first C<< . >>.

The method takes no parameters.

=cut
sub short_host_name
{
	### NOTE: This method doesn't offer logging.
	my $self  = shift;
	my $anvil = $self->parent;
	
	my $short_host_name =  $anvil->Get->host_name;
	   $short_host_name =~ s/\..*$//;
	
	return($short_host_name);
}


=head2 switches

This reads in the command line switches used to invoke the parent program. 

It takes no arguments, and data is stored in 'C<< $anvil->data->{switches}{x} >>', where 'x' is the switch used.

Switches in the form 'C<< -x >>' and 'C<< --x >>' are treated the same and the corresponding 'C<< $anvil->data->{switches}{x} >>' will contain '#!set!#'. 

Switches in the form 'C<< -x foo >>', 'C<< --x foo >>', 'C<< -x=foo >>' and 'C<< --x=foo >>' are treated the same and the corresponding 'C<< $anvil->data->{switches}{x} >>' will contain 'foo'. 

The switches 'C<< -v >>', 'C<< -vv >>', 'C<< -vvv >>' and 'C<< -vvvv >>' will cause the active log level to automatically change to 1, 2, 3 or 4 respectively. Passing 'C<< -V >>' will set the log level to '0'.

Anything after 'C<< -- >>' is treated as a raw string and is not processed. 

=cut
### TODO: This doesn't handle quoted values, System->parse_arguments() does. Switch to using it. Note that 
###       we'll still need to process '--raw' here (or make it work there)
sub switches
{
	my $self      = shift;
	my $parameter = shift;
	my $anvil     = $self->parent;
	my $debug     = defined $parameter->{debug} ? $parameter->{debug} : 3;
	
	my $last_argument = "";
	foreach my $argument (@ARGV)
	{
		if ($last_argument eq "raw")
		{
			# Don't process anything.
			$anvil->data->{switches}{raw} .= " $argument";
		}
		elsif ($argument =~ /^-/)
		{
			# If the argument is just '--', appeand everything after it to 'raw'.
			if ($argument eq "--")
			{
				$last_argument                = "raw";
				$anvil->data->{switches}{raw} = "";
			}
			else
			{
				($last_argument) = ($argument =~ /^-{1,2}(.*)/)[0];
				if ($last_argument =~ /=/)
				{
					# Break up the variable/value.
					($last_argument, my $value) = (split /=/, $last_argument, 2);
					$anvil->data->{switches}{$last_argument} = $value;
				}
				else
				{
					$anvil->data->{switches}{$last_argument} = "#!SET!#";
				}
			}
		}
		else
		{
			if ($last_argument)
			{
				$anvil->data->{switches}{$last_argument} = $argument;
				$last_argument                           = "";
			}
			else
			{
				# Got a value without an argument, so just record it as '#!SET!#'.
				$anvil->data->{switches}{$argument} = "#!SET!#";
			}
		}
	}
	
	# Clean up the initial space added to 'raw'.
	if ($anvil->data->{switches}{raw})
	{
		$anvil->data->{switches}{raw} =~ s/^ //;
	}
	
	# Adjust the log level if requested.
	$anvil->Log->_adjust_log_level();
	
	return(0);
}

=head2 trusted_hosts

This returns an array reference containing host UUIDs of hosts this machine should trust. Specifically, any Striker dashboards this host uses, and if this host is in an Anvil!, the peers. The array will include this host's UUID as well.

This method takes no parameters

=cut
sub trusted_hosts
{
	my $self      = shift;
	my $parameter = shift;
	my $anvil     = $self->parent;
	my $debug     = defined $parameter->{debug} ? $parameter->{debug} : 3;
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => $debug, key => "log_0125", variables => { method => "Get->trusted_hosts()" }});
	
	my $local_host_uuid    = $anvil->Get->host_uuid;
	my $in_anvil           = $anvil->data->{hosts}{host_uuid}{$local_host_uuid}{anvil_name};
	my $trusted_host_uuids = [$local_host_uuid];
	foreach my $host_uuid (keys %{$anvil->data->{hosts}{host_uuid}})
	{
		# Skip ourselves.
		next if $host_uuid eq $anvil->Get->host_uuid;
		
		my $host_name  = $anvil->data->{hosts}{host_uuid}{$host_uuid}{host_name};
		my $host_type  = $anvil->data->{hosts}{host_uuid}{$host_uuid}{host_type};
		my $host_key   = $anvil->data->{hosts}{host_uuid}{$host_uuid}{host_key};
		my $anvil_name = $anvil->data->{hosts}{host_uuid}{$host_uuid}{anvil_name};
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
			's1:host_uuid'  => $host_uuid, 
			's2:host_name'  => $host_name, 
			's3:host_type'  => $host_type, 
			's4:host_key'   => $host_key, 
			's5:anvil_name' => $anvil_name, 
		}});
		
		# Skip if the host_key is 'DELETED'.
		next if $host_key eq "DELETED";
		
		if ($anvil->Get->host_type eq "striker")
		{
			# Add all known machines
			push @{$trusted_host_uuids}, $host_uuid;
		}
		elsif ((($in_anvil) && ($anvil_name eq $in_anvil)) or (exists $anvil->data->{database}{$host_uuid}))
		{
			# Add dashboards we use and peers
			push @{$trusted_host_uuids}, $host_uuid;
		}
	}
	
	return($trusted_host_uuids)
}

=head2 uptime

This returns, in seconds, how long the host has been up and running for. 

This method takes no parameters.

=cut
### TODO: Make this work on remote hosts
sub uptime
{
	my $self      = shift;
	my $parameter = shift;
	my $anvil     = $self->parent;
	my $debug     = defined $parameter->{debug} ? $parameter->{debug} : 3;
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => $debug, key => "log_0125", variables => { method => "Get->uptime()" }});
	
	my $uptime = $anvil->Storage->read_file({
		force_read => 1,
		cache      => 0,
		file       => $anvil->data->{path}{proc}{uptime},
	});
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { uptime => $uptime }});
	
	# Clean it up. We'll have gotten two numbers, the uptime in seconds (to two decimal places) and the 
	# total idle time. We only care about the int number.
	$uptime =~ s/^(\d+)\..*$/$1/;
	$uptime =~ s/\n//gs;
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { uptime => $uptime }});
	
	return($uptime);
}

=head2 users_home

This method takes a user's name and returns the user's home directory. If the home directory isn't found, C<< 0 >> is returned.

Parameters;

=head3 user (optional, default is the user name of the real UID (as stored in '$<'))

This is the user whose home directory you are looking for.

=cut
sub users_home
{
	my $self      = shift;
	my $parameter = shift;
	my $anvil     = $self->parent;
	my $debug     = defined $parameter->{debug} ? $parameter->{debug} : 3;
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => $debug, key => "log_0125", variables => { method => "Get->users_home()" }});
	
	my $home_directory = 0;
	
	my $user = defined $parameter->{user} ? $parameter->{user} : getpwuid($<);
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { user => $user }});
	
	# Make sure the user is only one digit. Sometimes $< (and others) will return multiple IDs.
	if ($user =~ /^\d+ \d$/)
	{
		$user =~ s/^(\d+)\s.*$/$1/;
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { user => $user }});
	}
	
	# If the user is numerical, convert it to a name.
	if ($user =~ /^\d+$/)
	{
		$user = getpwuid($user);
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { user => $user }});
	}
	
	# Still don't have a name? fail...
	if ($user eq "")
	{
		# No user? No bueno...
		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 0, priority => "err", key => "log_0020", variables => { method => "Get->users_home()", parameter => "user" }});
		return($home_directory);
	}
	
	my $body = $anvil->Storage->read_file({file => $anvil->data->{path}{data}{passwd}});
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { body => $body }});
	foreach my $line (split /\n/, $body)
	{
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { line => $line }});
		if ($line =~ /^$user:/)
		{
			$home_directory = (split/:/, $line)[5];
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { home_directory => $home_directory }});
			last;
		}
	}
	
	# Do I have the a user's $HOME now?
	if (not $home_directory)
	{
		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 0, priority => "err", key => "log_0061", variables => { user => $user }});
	}
	
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { home_directory => $home_directory }});
	return($home_directory);
}

=head2 uuid

This method returns a new v4 UUID (using 'UUID::Tiny').

Parameters;

=head3 short (optional, default '0')

This returns just the first 8 bytes of the uuid. For example, if the generated UUID is C<< 9e4b3f7c-5a98-40b6-9c34-84fdb24ddd30 >>, only C<< 9e4b3f7c >> is returned.

=cut
sub uuid
{
	my $self      = shift;
	my $parameter = shift;
	my $anvil     = $self->parent;
	my $debug     = defined $parameter->{debug} ? $parameter->{debug} : 3;
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => $debug, key => "log_0125", variables => { method => "Get->uuid()" }});
	
	my $short = defined $parameter->{short} ? $parameter->{short} : 0;
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
		short => $short,
	}});
	
	my $uuid = create_uuid_as_string(UUID_RANDOM);
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { uuid => $uuid }});
	
	if ($short)
	{
		$uuid =~ s/^(\w+?)-.*$/$1/;
	}
	
	return($uuid);
}

# =head3
# 
# Private Functions;
# 
# =cut

#############################################################################################################
# Private functions                                                                                         #
#############################################################################################################

=head2 _salt

This generates a random salt string for use with internal Striker passwords.

=cut
sub _salt
{
	my $self      = shift;
	my $parameter = shift;
	my $anvil     = $self->parent;
	my $debug     = defined $parameter->{debug} ? $parameter->{debug} : 3;
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => $debug, key => "log_0125", variables => { method => "Get->_salt()" }});

	my $salt        = "";
	my $salt_length = $anvil->data->{sys}{password}{salt_length} =~ /^\d+$/ ? $anvil->data->{sys}{password}{salt_length} : 16;
	my @seed        = (" ", "~", "`", "!", "#", "^", "&", "*", "(", ")", "-", "_", "+", "=", "{", "[", "}", "]", "|", ":", ";", "'", ",", "<", ".", ">", "/");
	my @alpha       = ("a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z");
	my $seed_count  = @seed;
	my $alpha_count = @alpha;

	my $skip_count = 0;
	for (1..$salt_length)
	{
		# We want to have a little randomness in the salt length, but not skip tooooo many times.
		if ((int(rand(20)) == 2) && ($skip_count <= 3))
		{
			$skip_count++;
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { skip_count => $skip_count }});
			next;
		}
		
		# What character will this string be?
		my $this_integer = int(rand(3));
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { this_integer => $this_integer }});
		if ($this_integer == 0)
		{
			# Inject a random digit
			$salt .= int(rand(10));
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { salt => $salt }});
		}
		elsif ($this_integer == 1)
		{
			# Inject a random letter
			$salt .= $alpha[int(rand($alpha_count))];
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { salt => $salt }});
		}
		else
		{
			# Inject a random character
			$salt .= $seed[int(rand($seed_count))];
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { salt => $salt }});
		}
	}

	return($salt);
}


=head2 _wrap_to

This determines how wide the user's terminal currently is and returns that width, as well as store it in C<< sys::terminal::columns >>.

This takes no parameters. If there is a problem reading the column width, C<< 0 >> will be returned.

=cut
sub _wrap_to
{
	my $self      = shift;
	my $parameter = shift;
	my $anvil     = $self->parent;
	my $debug     = defined $parameter->{debug} ? $parameter->{debug} : 3;
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => $debug, key => "log_0125", variables => { method => "Get->_wrap_to()" }});
	
	# Get the column width
	my ($columns, $return_code) = $anvil->System->call({debug => $debug, redirect_stderr => 0, shell_call => $anvil->data->{path}{exe}{tput}." cols" });
	if ((not defined $columns) or ($columns !~ /^\d+$/))
	{
		# Set 0.
		$columns = 0;
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { columns => $columns }});
	}
	else
	{
		# Got a good value
		$anvil->data->{sys}{terminal}{columns} = $columns;
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 'sys::terminal::columns' => $anvil->data->{sys}{terminal}{columns} }});
	}

	return($columns);
}

1;