#!/usr/bin/perl
# 
# This program will collect data from all accessible machines and compile it into a common tarball. This is
# designed to make it easier to diagnose faults.
# 
# Exit codes;
# 0 = Normal exit.
# 1 = No database connection.
# 
# TODO: 
# 
# USAGE:
# 

use strict;
use warnings;
use Anvil::Tools;
require POSIX;
use Term::Cap;
use Text::Diff;
use Data::Dumper;

my $THIS_FILE           =  ($0 =~ /^.*\/(.*)$/)[0];
my $running_directory   =  ($0 =~ /^(.*?)\/$THIS_FILE$/)[0];
if (($running_directory =~ /^\./) && ($ENV{PWD}))
{
	$running_directory =~ s/^\./$ENV{PWD}/;
}

# Turn off buffering so that the pinwheel will display while waiting for the SSH call(s) to complete.
$| = 1;

my $anvil = Anvil::Tools->new();

# Read switches (target ([user@]host[:port]) and the file with the target's password.
$anvil->Get->switches({list => [
	"anvil", 
	"hosts",
	"output-file"], man => $THIS_FILE});
$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => $anvil->data->{switches}});
$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 2, key => "log_0115", variables => { program => $THIS_FILE }});

# Connect to the database(s). If we have no connections, we'll proceed anyway as one of the 'run_once' tasks
# is to setup the database server.
$anvil->Database->connect();
$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 3, secure => 0, key => "log_0132"});
if (not $anvil->data->{sys}{database}{connections})
{
	# No databases, update the job, sleep for a bit and then exit. The daemon will pick it up and try 
	# again after we exit.
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 0, priority => "err", key => "error_0305"});
	sleep 10;
	$anvil->nice_exit({exit_code => 1});
}

# Make sure we're running as 'root'
# $< == real UID, $> == effective UID
if (($< != 0) && ($> != 0))
{
	# Not root
	print $anvil->Words->string({key => "error_0005"})."\n";
	$anvil->nice_exit({exit_code => 1});
}

# Make sure we're a striker.
if ($anvil->Get->host_type ne "striker")
{
	print "This has to be run on a Striker dashboard.\n";
	$anvil->nice_exit({exit_code => 1});
}

# Make sure the collection directory exists.
$anvil->data->{sys}{date_and_time}     = $anvil->Get->date_and_time({file_name => 1});
$anvil->data->{sys}{compile_directory} = "/tmp/anvil-debug_".$anvil->data->{sys}{date_and_time};
$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
	"sys::date_and_time"     => $anvil->data->{sys}{date_and_time},
	"sys::compile_directory" => $anvil->data->{sys}{compile_directory},
}});

print "Data collection has begun. This will take a while!\n\n";

# Get the directory portion of the output path and make sure it exists.
my $tarball = process_output($anvil);
$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { tarball => $tarball }});

process_switches($anvil);

collect_data($anvil);

# Create the tarball now.
print "\nData collection complete\n";
print "- Creating the tarball now. PLEASE BE PATIENT!... ";
my $shell_call = $anvil->data->{path}{exe}{tar}." -cvjf ".$tarball." ".$anvil->data->{sys}{compile_directory};
$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
	's1:tarball'    => $tarball,
	's2:shell_call' => $shell_call,
}});

my ($output, $return_code) = $anvil->System->call({shell_call => $shell_call});
$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
	output      => $output, 
	return_code => $return_code, 
}});
print "Done!\n";

print "\n[ Complete ] - The debug data collected here: [".$tarball."]\n";
print "[ Warning  ] - The collected data and logs likely include sensitive information! Share it carefully!\n";

$anvil->nice_exit({exit_code => 0});


#############################################################################################################
# Functions                                                                                                 #
#############################################################################################################

sub process_output
{
	my ($anvil) = @_;
	
	my $tarball = "/root/anvil-debug_".$anvil->data->{sys}{date_and_time}.".tar.bz2";
	if ($anvil->data->{switches}{'output-file'})
	{
		my $new_directory = $anvil->data->{switches}{'output-file'};
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { new_directory => $new_directory }});
		if ($new_directory !~ /^\//)
		{
			print "[ Error ] - The output path needs to be a path.\n";
			$anvil->nice_exit({exit_code => 1});
		}
		else
		{
			# Append .tar.bz2.
			$tarball = $new_directory;
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { tarball => $tarball }});
		}
	}
	
	# Break the directory off and make sure the output directory exists.
	my $output_file      = ($tarball =~ /^.*\/(.*)$/)[0];
	my $output_directory = ($tarball =~ /^(.*?)\/$output_file$/)[0];
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
		output_file      => $output_file,
		output_directory => $output_directory, 
	}});
	
	if (not $output_file)
	{
		$output_file = "anvil-debug_".$anvil->data->{sys}{date_and_time}.".tar.bz2";
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { output_file => $output_file }});
	}
	elsif ($output_file !~ /\.tar\.bz2/)
	{
		$output_file .= ".tar.bz2";
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { output_file => $output_file }});
	}
	
	if ($output_directory ne "/")
	{
		print "Preparing local machine\n";
		if (! -d $output_directory) {
			print "- Creating the output directory: [".$output_directory."]... ";
			my $failed = $anvil->Storage->make_directory({directory => $output_directory});
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { failed => $failed }});
			if ($failed)
			{
				print "Failed!\nUnable to create the directory: [".$anvil->data->{sys}{compile_directory}."]. The error should be logged.\n";
				$anvil->nice_exit({exit_code => 1});
			}
			print "Done!\n";
		}
		else
		{
			print "- Output directory [".$output_directory."] already exists.\n";
		}
	}
	
	$tarball = $output_directory."/".$output_file;
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { tarball => $tarball }});
	
	return($tarball);
}

sub collect_data
{
	my ($anvil) = @_;
	
	print "- Creating temporary data dir [".$anvil->data->{sys}{compile_directory}."]... ";
	my $failed = $anvil->Storage->make_directory({directory => $anvil->data->{sys}{compile_directory}});
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { failed => $failed }});
	if ($failed)
	{
		print "Failed to create the directory: [".$anvil->data->{sys}{compile_directory}."]. The error should be logged.\n";
		$anvil->nice_exit({exit_code => 1});
	}
	print "Done!\n";
	
	my $hosts = @{$anvil->data->{collect_from}};
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { hosts => $hosts }});
	foreach my $host_type ("striker", "node", "dr")
	{
		foreach my $host_name (sort {$a cmp $b} keys %{$anvil->data->{sys}{hosts}{by_name}})
		{
			my $host_uuid       = $anvil->data->{sys}{hosts}{by_name}{$host_name};
			my $short_host_name = $anvil->data->{hosts}{host_uuid}{$host_uuid}{short_host_name};
			my $this_host_type  = $anvil->data->{hosts}{host_uuid}{$host_uuid}{host_type};
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
				's1:host_name'       => $host_name, 
				's2:host_uuid'       => $host_uuid,
				's3:short_host_name' => $short_host_name, 
				's4:this_host_type'  => $this_host_type, 
			}});
			next if $host_type ne $this_host_type;
			
			# Are we collecting from a subset only?
			if ($hosts)
			{
				# Yes, is this host one of them?
				my $found = 0;
				foreach my $this_host_uuid (@{$anvil->data->{collect_from}})
				{
					$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
						host_uuid      => $host_uuid, 
						this_host_uuid => $this_host_uuid,
					}});
					if ($this_host_uuid eq $host_uuid)
					{
						$found = 1;
						$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { found => $found }});
						last;
					}
				}
				next if not $found;
			}
			
			# Make sure there's a directory for this host.
			my $target_directory = $anvil->data->{sys}{compile_directory}."/".$short_host_name;
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { target_directory => $target_directory }});
			if (not -d $target_directory)
			{
				my $failed = $anvil->Storage->make_directory({
					directory => $target_directory,
					mode      => "777",
				});
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { failed => $failed }});
				if ($failed)
				{
					print "Failed to create the directory: [".$target_directory."]. The error should be logged.\n";
					$anvil->nice_exit({exit_code => 1});
				}
			}
			
			# Is this the local host or a remote one?
			if ($host_uuid eq $anvil->Get->host_uuid)
			{
				### Collecting local data.
				collect_local_data($anvil, $target_directory);
			}
			else
			{
				# Collecting data from a remote machine
				my $problem = collect_remote_data($anvil, $host_uuid, $target_directory);
				if ($problem)
				{
					# Create a file saying we couldn't access this machine.
					my $body = "No access to: [".$host_name."] found.\n";
					my $file = $target_directory."/no_access.txt";
					$anvil->Storage->write_file({
						file      => $file, 
						body      => $body,
						overwrite => 1,
						backup    => 0,
					});
				}
			}
		}
	}
	
	return(0);
}

sub collect_remote_data
{
	my ($anvil, $host_uuid, $target_directory) = @_;
	
	my $host_name       = $anvil->data->{hosts}{host_uuid}{$host_uuid}{host_name};
	my $short_host_name = $anvil->data->{hosts}{host_uuid}{$host_uuid}{short_host_name};
	my $this_host_type  = $anvil->data->{hosts}{host_uuid}{$host_uuid}{host_type};
	my $failed_body     = "File not copied from: [".$host_name."].\n";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
		's1:host_name'        => $host_name, 
		's2:host_uuid'        => $host_uuid,
		's3:short_host_name'  => $short_host_name, 
		's4:this_host_type'   => $this_host_type, 
		's5:target_directory' => $target_directory, 
	}});
	
	# Dump the previous boot logs to a file.
	print "\nGrabbing logs and data from the remote system: [".$short_host_name."].\n";
	print "- Testing access...\n";
	my $matches = $anvil->Network->find_access({
		debug  => 2,
		target => $host_name, 
	});
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { matches => $matches }});
	$anvil->data->{peer}{$short_host_name}{access}{ip}      = "";
	$anvil->data->{peer}{$short_host_name}{access}{network} = "";
	foreach my $preferred_network ("bcn", "mn", "ifn", "sn", "any")
	{
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { preferred_network => $preferred_network }});
		foreach my $network_name (sort {$a cmp $b} keys %{$anvil->data->{network_access}})
		{
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { network_name => $network_name }});
			if (($network_name !~ /^$preferred_network/) && ($preferred_network ne "any"))
			{
				next;
			}
			
			next if $network_name !~ /^$preferred_network/;
			my $target_ip   = $anvil->data->{network_access}{$network_name}{target_ip_address};
			my $test_access = $anvil->Remote->test_access({target => $target_ip});
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
				's1:network_name' => $network_name, 
				's2:target_ip'    => $target_ip, 
				's3:test_access'  => $test_access, 
			}});
			
			if ($test_access)
			{
				# We're good.
				print "- Found access over the network: [".$network_name."] using the target IP: [".$target_ip."]\n";
				$anvil->data->{peer}{$short_host_name}{access}{ip}      = $target_ip;
				$anvil->data->{peer}{$short_host_name}{access}{network} = $network_name;
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
					"s1:peer::${short_host_name}::access::ip"      => $anvil->data->{peer}{$short_host_name}{access}{ip}, 
					"s2:peer::${short_host_name}::access::network" => $anvil->data->{peer}{$short_host_name}{access}{network}, 
				}});
			}
		}
	}
	
	if (not $anvil->data->{peer}{$short_host_name}{access}{ip})
	{
		print "No access!!\n";
		print "- Not able to collect data from this host, skipping.\n";
		return(1);
	}
	
	print "- Writing out system logs from the previous boot... ";
	my $shell_call = $anvil->data->{path}{exe}{journalctl}." -b -1 > /tmp/journalctl-previous-boot.log";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { shell_call => $shell_call }});
	my ($output, $error, $return_code) = $anvil->Remote->call({
		shell_call => $shell_call, 
		target     => $anvil->data->{peer}{$short_host_name}{access}{ip},
	});
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
		output      => $output, 
		error       => $error,
		return_code => $return_code,
	}});
	
	# Copying the file
	print "Done! Copying to here... ";
	$anvil->Storage->rsync({
		debug       => 2,
		source      => "root\@".$anvil->data->{peer}{$short_host_name}{access}{ip}.":/tmp/journalctl-previous-boot.log",
		destination => $target_directory."/",
	});
	my $test_file = $target_directory."/journalctl-previous-boot.log";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { test_file => $test_file }});
	if (-e $test_file)
	{
		print "Done.\n";
	}
	else
	{
		print "Failed!\n";
		print " - [ Warning ] - For some reason, this file was not collected.\n";
		$anvil->Storage->write_file({
			file      => $test_file, 
			body      => $failed_body,
			overwrite => 1,
			backup    => 0,
		});
	}
	
	# Dump the current boot logs
	print "- Grabbing system logs from this boot... ";
	$shell_call = $anvil->data->{path}{exe}{journalctl}." -b 0 > /tmp/journalctl-current-boot.log";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { shell_call => $shell_call }});
	
	($output, $error, $return_code) = $anvil->Remote->call({
		shell_call => $shell_call, 
		target     => $anvil->data->{peer}{$short_host_name}{access}{ip},
	});
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
		output      => $output, 
		error       => $error,
		return_code => $return_code,
	}});
	
	# Copying the file
	print "Done! Copying to here... ";
	$anvil->Storage->rsync({
		debug       => 2,
		source      => "root\@".$anvil->data->{peer}{$short_host_name}{access}{ip}.":/tmp/journalctl-current-boot.log",
		destination => $target_directory."/",
	});
	$test_file = $target_directory."/journalctl-current-boot.log";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { test_file => $test_file }});
	if (-e $test_file)
	{
		print "Done.\n";
	}
	else
	{
		print "Failed!\n";
		print "- For some reason, this file was not collected.\n";
		$anvil->Storage->write_file({
			file      => $test_file, 
			body      => $failed_body,
			overwrite => 1,
			backup    => 0,
		});
	}
	
	# Grab cloud-init data, if it exists.
	$shell_call = "if [ -e /var/log/cloud-init.log ]; then echo 1; else echo 0; fi";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { shell_call => $shell_call }});
	
	($output, $error, $return_code) = $anvil->Remote->call({
		shell_call => $shell_call, 
		target     => $anvil->data->{peer}{$short_host_name}{access}{ip},
	});
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
		output      => $output, 
		error       => $error,
		return_code => $return_code,
	}});
	
	if ($output eq "1")
	{
		print "- Grabbing cloud-init logs... ";
		$anvil->Storage->rsync({
			debug       => 2,
			source      => "root\@".$anvil->data->{peer}{$short_host_name}{access}{ip}.":/var/log/cloud-init*",
			destination => $target_directory."/",
		});
		$test_file = $target_directory."/cloud-init.log";
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { test_file => $test_file }});
		if (-e $test_file)
		{
			print "Done.\n";
		}
		else
		{
			print "Failed!\n";
			print "- For some reason, these files were not collected.\n";
			$anvil->Storage->write_file({
				file      => $test_file, 
				body      => $failed_body,
				overwrite => 1,
				backup    => 0,
			});
		}
	}
	
	# If we're a striker, dump the database also.
	if ($this_host_type eq "striker")
	{
		# What's the password and address?
		if (not exists $anvil->data->{database}{$host_uuid})
		{
			# The remote striker isn't known
			print "- The host is a Striker, but we don't have database access info, skipping DB dump.\n";
		}
		else
		{
			print "- Dumping and compressing remote database data, PLEASE BE PATIENT!... ";
			my $pg_file = "/root/.pgpass";
			my $pg_body = "*:*:*:admin:".$anvil->data->{database}{$host_uuid}{password};
			$anvil->Storage->write_file({
				file      => $pg_file, 
				body      => $pg_body,
				mode      => "600",
				overwrite => 0,
				backup    => 0,
			});
			my $shell_call = $anvil->data->{path}{exe}{pg_dump}." -h ".$anvil->data->{peer}{$short_host_name}{access}{ip}." -U admin anvil > ".$target_directory."/anvil.out.bz2";
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { shell_call => $shell_call }});
			
			my ($output, $return_code) = $anvil->System->call({shell_call => $shell_call});
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
				output      => $output, 
				return_code => $return_code, 
			}});
			if ($return_code)
			{
				# Failed
				print "Failed!\n";
				print "Expected the return code '0', but got: [".$return_code."]. The error, if any, was:\n";
				print "========\n";
				print $output."\n";
				print "========\n";
				$anvil->nice_exit({exit_code => 1});
			}
			unlink $pg_file;
			print "Done!\n";
		}
	}
	
	print "- Grabbing hosts file... ";
	$anvil->Storage->rsync({
		debug       => 2,
		source      => "root\@".$anvil->data->{peer}{$short_host_name}{access}{ip}.":/etc/hosts",
		destination => $target_directory."/",
	});
	$test_file = $target_directory."/hosts";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { test_file => $test_file }});
	if (-e $test_file)
	{
		print "Done.\n";
	}
	else
	{
		print "Failed!\n";
		print "- For some reason, this file was not collected.\n";
		$anvil->Storage->write_file({
			file      => $test_file, 
			body      => $failed_body,
			overwrite => 1,
			backup    => 0,
		});
	}
	
	print "- Grabbing Anvil! log... ";
	$anvil->Storage->rsync({
		debug       => 2,
		source      => "root\@".$anvil->data->{peer}{$short_host_name}{access}{ip}.":/var/log/anvil.log",
		destination => $target_directory."/",
	});
	$test_file = $target_directory."/anvil.log";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { test_file => $test_file }});
	if (-e $test_file)
	{
		print "Done.\n";
	}
	else
	{
		print "Failed!\n";
		print "- For some reason, this file was not collected.\n";
		$anvil->Storage->write_file({
			file      => $test_file, 
			body      => $failed_body,
			overwrite => 1,
			backup    => 0,
		});
	}
	
	# If this is a node, grab the shared files.
	if ($this_host_type eq "node")
	{
		### NOTE: The pcs wrapper was timing out when dumping the CIB, hence statically calling pcs below.
		print "- Collecting the cluster information base (CIB)... ";
		$shell_call = $anvil->data->{path}{exe}{pcs_direct}." cluster cib > /tmp/cib.xml";
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { shell_call => $shell_call }});
		
		($output, $error, $return_code) = $anvil->Remote->call({
			shell_call => $shell_call,
			target     => $anvil->data->{peer}{$short_host_name}{access}{ip},
		});
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
			output      => $output, 
			return_code => $return_code, 
		}});
		
		# Copying the file
		print "Done! Copying to here... ";
		$anvil->Storage->rsync({
			debug       => 2,
			source      => "root\@".$anvil->data->{peer}{$short_host_name}{access}{ip}.":/tmp/cib.xml",
			destination => $target_directory."/",
		});
		my $test_file = $target_directory."/cib.xml";
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { test_file => $test_file }});
		if (-e $test_file)
		{
			print "Done.\n";
		}
		else
		{
			print "Failed!\n";
			print "- For some reason, this file was not collected.\n";
			$anvil->Storage->write_file({
				file      => $test_file, 
				body      => $failed_body,
				overwrite => 1,
				backup    => 0,
			});
		}
	}
	
	# If this is not a striker, collect definition files.
	if ($this_host_type ne "striker")
	{
		print "- Collecting server definitions... ";
		$anvil->Storage->rsync({
			debug       => 2,
			source      => "root\@".$anvil->data->{peer}{$short_host_name}{access}{ip}.":/mnt/shared/definitions",
			destination => $target_directory."/",
		});
		print "Done!\n";
		
		print "- Collecting replicated storage config... ";
		$anvil->Storage->rsync({
			debug       => 2,
			source      => "root\@".$anvil->data->{peer}{$short_host_name}{access}{ip}.":/etc/drbd.d",
			destination => $target_directory."/",
		});
		print "Done!\n";
	}
	
	return(0);
}

sub collect_local_data
{
	my ($anvil, $target_directory) = @_;
	
	my $host_uuid      = $anvil->Get->host_uuid();
	my $this_host_type = $anvil->data->{hosts}{host_uuid}{$host_uuid}{host_type};
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
		's1:target_directory' => $target_directory, 
		's2:host_uuid'        => $host_uuid, 
		's3:this_host_type'   => $this_host_type, 
	}});
	
	# Dump the previous boot logs to a file.
	print "\nGrabbing logs and data from the local system.\n";
	print "- Grabbing system logs from the previous boot... ";
	my $shell_call = $anvil->data->{path}{exe}{journalctl}." -b -1 > ".$target_directory."/journalctl-previous-boot.log";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { shell_call => $shell_call }});
	
	my ($output, $return_code) = $anvil->System->call({shell_call => $shell_call});
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
		output      => $output, 
		return_code => $return_code, 
	}});
	print "Done!\n";
	
	# Dump the current boot logs
	print "- Grabbing system logs from this boot... ";
	$shell_call = $anvil->data->{path}{exe}{journalctl}." -b 0 > ".$target_directory."/journalctl-current-boot.log";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { shell_call => $shell_call }});
	
	($output, $return_code) = $anvil->System->call({shell_call => $shell_call});
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
		output      => $output, 
		return_code => $return_code, 
	}});
	print "Done!\n";
	
	# If we're a striker, dump the database also.
	if ($this_host_type eq "striker")
	{
		print "- Dumping and compressing database data, PLEASE BE PATIENT!... ";
		my $shell_call = $anvil->data->{path}{exe}{su}." postgres -c \"".$anvil->data->{path}{exe}{pg_dump}." anvil\" 2>/dev/null | ".$anvil->data->{path}{exe}{bzip2}." --stdout > ".$target_directory."/anvil.out.bz2";
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { shell_call => $shell_call }});
		
		my ($output, $return_code) = $anvil->System->call({shell_call => $shell_call});
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
			output      => $output, 
			return_code => $return_code, 
		}});
		if ($return_code)
		{
			# Failed
			print "Failed!\n";
			print "Expected the return code '0', but got: [".$return_code."]. The error, if any, was:\n";
			print "========\n";
			print $output."\n";
			print "========\n";
			$anvil->nice_exit({exit_code => 1});
		}
		print "Done!\n";
		
		# Grab screenshots.
		print "- Collecting server screenshots... ";
		if (-d $anvil->data->{path}{directories}{screenshots})
		{
			$shell_call = $anvil->data->{path}{exe}{tar}." -cvjf ".$target_directory."/server-screenshots.bz2 ".$anvil->data->{path}{directories}{screenshots};
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { shell_call => $shell_call }});
			
			($output, $return_code) = $anvil->System->call({shell_call => $shell_call});
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
				output      => $output, 
				return_code => $return_code, 
			}});
			if ($return_code)
			{
				# Failed
				print "Failed!\n";
				print "Expected the return code '0', but got: [".$return_code."]. The error, if any, was:\n";
				print "========\n";
				print $output."\n";
				print "========\n";
				$anvil->nice_exit({exit_code => 1});
			}
			print "Done!\n";
		}
		else
		{
			print "Failed!\nScreenshot directory: [".$anvil->data->{path}{directories}{screenshots}."] doesn't exist, skipping.\n";
		}
	}
	
	print "- Grabbing hosts file... ";
	$shell_call = $anvil->data->{path}{exe}{cp}." /etc/hosts ".$target_directory."/";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { shell_call => $shell_call }});
	
	($output, $return_code) = $anvil->System->call({shell_call => $shell_call});
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
		output      => $output, 
		return_code => $return_code, 
	}});
	print "Done!\n";
	
	print "- Grabbing Anvil! log... ";
	$shell_call = $anvil->data->{path}{exe}{cp}." /var/log/anvil.log ".$target_directory."/";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { shell_call => $shell_call }});
	
	($output, $return_code) = $anvil->System->call({shell_call => $shell_call});
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
		output      => $output, 
		return_code => $return_code, 
	}});
	print "Done!\n";
	
	if (-e "/var/log/cloud-init.log")
	{
		print "- Grabbing cloud-init logs... ";
		$shell_call = $anvil->data->{path}{exe}{cp}." /var/log/cloud-init* ".$target_directory."/";
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { shell_call => $shell_call }});
		
		($output, $return_code) = $anvil->System->call({shell_call => $shell_call});
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
			output      => $output, 
			return_code => $return_code, 
		}});
		print "Done!\n";
	}
	
	# If this is a node, grab the shared files.
	if ($this_host_type eq "node")
	{
		print "- Collecting the cluster information base (CIB)... ";
		$shell_call = $anvil->data->{path}{exe}{pcs_direct}." cluster cib > ".$target_directory."/cib.xml";
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { shell_call => $shell_call }});
		
		($output, $return_code) = $anvil->System->call({shell_call => $shell_call});
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
			output      => $output, 
			return_code => $return_code, 
		}});
		print "Done!\n";
	}
	
	# If this is not a striker, collect definition files.
	if ($this_host_type ne "striker")
	{
		print "- Collecting server definitions... ";
		$shell_call = $anvil->data->{path}{exe}{rsync}." -av /mnt/shared/definitions ".$target_directory."/";
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { shell_call => $shell_call }});
		
		($output, $return_code) = $anvil->System->call({shell_call => $shell_call});
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
			output      => $output, 
			return_code => $return_code, 
		}});
		print "Done!\n";
	}
	
	return(0);
}

sub process_switches
{
	my ($anvil) = @_;
	
	$anvil->data->{collect_from} = [];
	$anvil->Database->get_hosts();

	if ($anvil->data->{switches}{anvil})
	{
		if ($anvil->data->{switches}{anvil} eq "#!SET!#")
		{
			# Show a list of Anvil! systems.
			print "Available Anvil! systems. Use '--anvil <name or UUID>' to collect data from a specific Anvil! node.\n";
			foreach my $anvil_name (sort {$a cmp $b} keys %{$anvil->data->{anvils}{anvil_name}})
			{
				print "- Name: [".$anvil_name."], UUID: [".$anvil->data->{anvils}{anvil_name}{$anvil_name}{anvil_uuid}."]\n";
			}
			$anvil->nice_exit({exit_code => 0});
		}
		
		# Make sure the anvil is valid.
		my ($anvil_name, $anvil_uuid) = $anvil->Get->anvil_from_switch({
			debug => 2, 
			anvil => $anvil->data->{switches}{anvil},
		});
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
			's1:anvil_name' => $anvil_name, 
			's2:anvil_uuid' => $anvil_uuid, 
		}});
		
		if (not $anvil_name)
		{
			# Bad name.
			print "[ Error ] - Unable to get the Anvil! name and UUID from the string: [".$anvil->data->{switches}{anvil}."]\n";
			$anvil->nice_exit({exit_code => 1});
		}
		
		# Add the host_uuids to the collect_from array.
		push @{$anvil->data->{collect_from}}, $anvil->data->{anvils}{anvil_uuid}{$anvil_uuid}{anvil_node1_host_uuid};
		push @{$anvil->data->{collect_from}}, $anvil->data->{anvils}{anvil_uuid}{$anvil_uuid}{anvil_node2_host_uuid};
	}

	if ($anvil->data->{switches}{hosts})
	{
		if ($anvil->data->{switches}{hosts} eq "#!SET!#")
		{
			# Show a list of all machines.
			print "Available Anvil! cluster systems. Use '--host <comma-separated list of names or UUIDs>' to collect data from specific hosts.\n";
			foreach my $host_type ("striker", "node", "dr")
			{
				print "- Striker Dashboards:\n" if $host_type eq "striker";
				print "\n- Anvil! sub-nodes:\n" if $host_type eq "node";
				print "\n- Disaster recovery hosts:\n" if $host_type eq "dr";
				foreach my $host_name (sort {$a cmp $b} keys %{$anvil->data->{sys}{hosts}{by_name}})
				{
					my $host_uuid      = $anvil->data->{sys}{hosts}{by_name}{$host_name};
					my $this_host_type = $anvil->data->{hosts}{host_uuid}{$host_uuid}{host_type};
					$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
						's1:host_name'      => $host_name, 
						's2:host_uuid'      => $host_uuid,
						's3:this_host_type' => $this_host_type, 
					}});
					next if $host_type ne $this_host_type;
					
					print " - Host: [".$host_name."], UUID: [".$host_uuid."]\n";
				}
			}
			
			$anvil->nice_exit({exit_code => 0});
		}
		
		foreach my $host (split/,/, $anvil->data->{switches}{hosts})
		{
			# Make sure this host is valid.
			my ($host_uuid) = $anvil->Database->get_host_uuid_from_string({string => $host});
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
				's1:host'      => $host, 
				's2:host_uuid' => $host_uuid,
			}});
			if (not $host_uuid)
			{
				print "[ Error ] - Unable to get the host UUID from the host string: [".$host."]\n";
				$anvil->nice_exit({exit_code => 1});
			}
			push @{$anvil->data->{collect_from}}, $host_uuid;
		}
	}

	# If we were restricted to an anvil or host, make sure we've added the Strikers.
	if (($anvil->data->{switches}{anvil}) or ($anvil->data->{switches}{hosts}))
	{
		foreach my $host_name (sort {$a cmp $b} keys %{$anvil->data->{sys}{hosts}{by_name}})
		{
			my $host_uuid      = $anvil->data->{sys}{hosts}{by_name}{$host_name};
			my $this_host_type = $anvil->data->{hosts}{host_uuid}{$host_uuid}{host_type};
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
				's1:host_name'      => $host_name, 
				's2:host_uuid'      => $host_uuid,
				's3:this_host_type' => $this_host_type, 
			}});
			next if $this_host_type ne "striker";
			
			my $seen = 0;
			foreach my $this_host_uuid (@{$anvil->data->{collect_from}})
			{
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
					's1:this_host_uuid' => $this_host_uuid, 
					's2:host_uuid'      => $host_uuid,
				}});
				if ($this_host_uuid eq $host_uuid)
				{
					$seen = 1;
					$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { seen => $seen }});
					last;
				}
			}
			
			if (not $seen)
			{
				push @{$anvil->data->{collect_from}}, $host_uuid;
			}
		}
	}
	
	return(0);
}