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* Made Get->switches take a bare word as a valid switch.

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* Framed up the new ocf:alteeve:server agent. It only handles metadata at this point, but its a start.

Signed-off-by: Digimer <digimer@alteeve.ca>
main
Digimer 7 years ago
parent 14763136f2
commit 4dcaa524c5
2 changed files with 352 additions and 4 deletions
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  1. 4
      Anvil/Tools/Get.pm
  2. 352
      ocf/alteeve/server

4
Anvil/Tools/Get.pm
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@ -663,8 +663,8 @@ sub switches
} }
else else
{ {
# Got a value without an argument. # Got a value without an argument, so just record it as '#!SET!#'.
$anvil->data->{switches}{error} = 1; $anvil->data->{switches}{$argument} = "#!SET!#";
} }
} }
} }

352
ocf/alteeve/server
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@ -1,12 +1,360 @@
#!/usr/bin/perl #!/usr/bin/perl
# #
# This is the resource agent used to manage servers on the Anvil! Intelligent Availability platform. # This is the resource agent used to manage servers on the Anvil! Intelligent Availability platform.
#
# License: GNU General Public License (GPL) v2+
# (c) 1997-2018 - Alteeve's Niche! Inc.
#
# WARNING: This is a pretty purpose-specific resource agent. No effort was made to test this on an rgmanager
# cluster or on any configuration outside how the Anvil! m3 uses it. If you plan to adapt it to
# another purpose, let us know and we'll try to help.
# #
# Based on: https://github.com/ClusterLabs/resource-agents/blob/master/doc/dev-guides/ra-dev-guide.asc # Based on: https://github.com/ClusterLabs/resource-agents/blob/master/doc/dev-guides/ra-dev-guide.asc
# #
# Error types from pacemaker's perspective;
#
# - Soft Error - Unless specifically configured otherwise, pacemaker will attempt to recover a resource
# in-place - usually by restarting the resource on the same node.
# - Hard Error - Unless specifically configured otherwise, pacemaker will attempt to recover a resource
# which failed with this error by restarting the resource on a different node.
# - Fatal Error - This is a cluster-wide error, it would make no sense to recover such a resource on a
# different node, let alone in-place. When a resource fails with this error, Pacemaker will
# attempt to shut down the resource, and wait for administrator intervention.
#
# Exit codes;
# 0 - OCF_SUCCESS
# - The action completed successfully. This is the expected return code for any successful start, stop,
# migrate_to, meta_data, help, and usage action.
# - For monitor, however, a modified convention applies:
# - If the server is running we return, OCF_SUCCESS. If not running and gracefully stopped or migrated
# off, return OCF_NOT_RUNNING.
#
# 1 - OCF_ERR_GENERIC
# - The action returned a generic error. This is used only when none of the more specific error codes,
# defined below, accurately describes the problem.
# - Pacemaker interprets this exit code as a soft error.
#
# 2 - OCF_ERR_ARGS
# - The resource’s configuration is not valid on this machine. This can happen if the serve fails to boot
# because of a missing bridge, for example.
#
# 3 - OCF_ERR_UNIMPLEMENTED
# - The resource agent was instructed to execute an action that we do not implement.
# - Not all resource agent actions are mandatory. We don't implement 'promote' or 'demote'. We do implement
# 'migrate_to', 'migrate_from', and 'notify'. If we're misconfigured as a master/slave resource, for
# example, then will alert the user about this misconfiguration by returning OCF_ERR_UNIMPLEMENTED.
#
# 4 - OCF_ERR_PERM
# - The action failed due to insufficient permissions. This may be due to a node not being able to open a
# definition file or resource config.
# - Pacemaker interprets this exit code as a hard error.
#
# 5 - OCF_ERR_INSTALLED
# - The action failed because a required component is missing on the node where the action was executed.
# This may be due to a required binary not being executable, or a the DRBD resource config file not
# existing.
# - Pacemaker interprets this exit code as a hard error.
#
# 6 - OCF_ERR_CONFIGURED
# - The action failed because the user misconfigured the resource in pacemaker. For example, the user may
# have configured an alphanumeric string for a parameter that really should be an integer.
# - Pacemaker interprets this exit code as a fatal error.
#
# 7 - OCF_NOT_RUNNING
# - The resource was found not to be running. This is an exit code that may be returned by the monitor
# action exclusively. Note that this implies that the resource has either gracefully shut down, or has
# never been started.
#
# 8 - OCF_RUNNING_MASTER
# 9 - OCF_FAILED_MASTER
# - These OCF exit codes are not used here.
#
# NOTE: We don't use Anvil::Tools to keep overhead low and to keep this agent independent as possible.
use strict; use strict;
use warnings; use warnings;
use XML::Simple;
use Data::Dumper;
# Turn off buffering so that the pinwheel will display while waiting for the SSH call(s) to complete.
$| = 1;
my $THIS_FILE = ($0 =~ /^.*\/(.*)$/)[0];
my $running_directory = ($0 =~ /^(.*?)\/$THIS_FILE$/)[0];
if (($running_directory =~ /^\./) && ($ENV{PWD}))
{
$running_directory =~ s/^\./$ENV{PWD}/;
}
my $conf = {
'log' => {
facility => "local0",
level => 2,
line_numbers => 1,
tag => $THIS_FILE,
},
# If a program isn't at the defined path, $ENV{PATH} will be searched.
path => {
exe => {
cibadmin => "/usr/sbin/cibadmin",
crm_error => "/usr/sbin/crm_error",
drbdadm => "/usr/sbin/drbdadm",
echo => "/usr/bin/echo",
getent => "/usr/bin/getent",
logger => "/usr/bin/logger",
stonith_admin => "/usr/sbin/stonith_admin",
},
},
environment => {
# The name of the server we care about.
OCF_RESKEY_name => "",
},
};
# Find executables.
find_executables($conf);
# Get any command line switches.
get_switches($conf);
if (($conf->{switches}{metadaata}) or ($conf->{switches}{'meta-data'}))
{
show_metadata($conf);
}
# Something for the logs
to_log($conf, {message => "ocf:alteeve:server invoked.", 'line' => __LINE__});
# If we hit here, something very wrong happened.
exit(255);
#############################################################################################################
# Functions #
#############################################################################################################
# This prints out the metadata and exits.
sub show_metadata
{
my ($conf) = @_;
# This is a pretty simple agent, by design. We only take a server name for now.
print '<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="ocs:alteeve:server">
<version>0.1</version>
<longdesc lang="en">
This resource agent manages KVM+qemu virtual servers on an Anvil! m3 Intelligent Availability™ system.
It manages underlying components like DRBD 9 storage resources, brodge connections and so forth.
</longdesc>
<shortdesc lang="en">Anvil! m3 server resource agent</shortdesc>
<parameters>
<parameter name="name" unique="1" required="1">
<longdesc lang="en">
This is the name of the server as reported by virsh.
</longdesc>
<shortdesc lang="en">Server name</shortdesc>
<content type="string"/>
</parameter>
</parameters>
<actions>
<action name="start" timeout="30" />
<action name="stop" timeout="600" />
<action name="monitor" timeout="10" interval="10" depth="0" />
<action name="notify" timeout="20" />
<action name="migrate_to" timeout="600" />
<action name="migrate_from" timeout="600" />
<action name="meta-data" timeout="5" />
<action name="validate-all" timeout="20" />
</actions>
</resource-agent>
';
exit(0);
}
# This gathers command line switches and stores them in 'swithes::<foo>'.
sub get_switches
{
my ($conf) = @_;
my $last_argument = "";
foreach my $argument (@ARGV)
{
if ($last_argument eq "raw")
{
# Don't process anything.
$conf->{switches}{raw} .= " $argument";
}
elsif ($argument =~ /^-/)
{
# If the argument is just '--', appeand everything after it to 'raw'.
if ($argument eq "--")
{
$last_argument = "raw";
$conf->{switches}{raw} = "";
}
else
{
($last_argument) = ($argument =~ /^-{1,2}(.*)/)[0];
if ($last_argument =~ /=/)
{
# Break up the variable/value.
($last_argument, my $value) = (split /=/, $last_argument, 2);
$conf->{switches}{$last_argument} = $value;
}
else
{
$conf->{switches}{$last_argument} = "#!SET!#";
}
}
}
else
{
if ($last_argument)
{
$conf->{switches}{$last_argument} = $argument;
$last_argument = "";
}
else
{
# Got a value without an argument. That's OK.
$conf->{switches}{$argument} = "#!SET!#";
}
}
}
# Clean up the initial space added to 'raw'.
if ($conf->{switches}{raw})
{
$conf->{switches}{raw} =~ s/^ //;
}
return(0);
}
# Log file entries
sub to_log
{
my ($conf, $parameters) = @_;
my $facility = defined $parameters->{facility} ? $parameters->{facility} : $conf->{'log'}{facility};
my $level = defined $parameters->{level} ? $parameters->{level} : 1;
my $line = defined $parameters->{'line'} ? $parameters->{'line'} : 0;
my $message = defined $parameters->{message} ? $parameters->{message} : "";
my $priority = defined $parameters->{priority} ? $parameters->{priority} : "";
# Leave if we don't care about this message
return if $level > $conf->{'log'}{level};
return if not $message;
# Build the message. We log the line
if (($conf->{'log'}{line_numbers}) && ($line))
{
$message = $line."; ".$message;
}
my $priority_string = $facility;
if ($priority)
{
$priority_string .= ".".$priority;
}
elsif ($level eq "0")
{
$priority_string .= ".notice";
}
elsif (($level eq "1") or ($level eq "2"))
{
$priority_string .= ".info";
}
else
{
$priority_string .= ".debug";
}
# Clean up the string for bash
$message =~ s/"/\\\"/gs;
#$message =~ s/\(/\\\(/gs;
my $shell_call = $conf->{path}{exe}{logger}." --priority ".$priority_string." --tag ".$conf->{'log'}{tag}." -- \"".$message."\"";
open (my $file_handle, $shell_call." 2>&1 |") or die "Failed to call: [".$shell_call."]. The error was: $!\n";
while(<$file_handle>)
{
# This should not generate output.
chomp;
my $line = $_;
print "Unexpected logging output: [".$line."]\n";
}
close $file_handle;
return(0);
}
# This checks the given paths and, if something isn't found, it searches PATH trying to find it.
sub find_executables
{
my ($conf) = @_;
# Variables.
my $check = "";
my $bad = 0;
# Log entries can only happen if I've found 'logger', so an extra check will be made on 'to_log'
# calls.
my @dirs = split/:/, $ENV{PATH};
foreach my $exe (sort {$b cmp $a} keys %{$conf->{path}{exe}})
{
if ( not -e $conf->{path}{exe}{$exe} )
{
to_log($conf, {message => "The program: [$exe] is not at: [".$conf->{path}{exe}{$exe}."]. Looking for it now...", 'line' => __LINE__, level => 1});
foreach my $path (@dirs)
{
$check = "$path/$exe";
$check =~ s/\/\//\//g;
to_log($conf, {message => "Checking: [$check]", 'line' => __LINE__, level => 2});
if ( -e $check )
{
if (-e $conf->{path}{exe}{logger})
{
to_log($conf, {message => "Found it! Changed path for: [$exe] from: [".$conf->{path}{exe}{$exe}."] to: [$check]", 'line' => __LINE__, level => 1});
}
else
{
warn "DEBUG: Found it! Changed path for: [$exe] from: [".$conf->{path}{exe}{$exe}."] to: [$check]\n";
}
$conf->{path}{exe}{$exe} = $check;
}
else
{
to_log($conf, {message => "Not found.", 'line' => __LINE__, level => 2});
}
}
}
else
{
to_log($conf, {message => "Found!", 'line' => __LINE__, level => 3});
next;
}
# Make sure it exists now.
to_log($conf, {message => "Checking again if: [$exe] is at: [".$conf->{path}{exe}{$exe}."].", 'line' => __LINE__, level => 3});
if (not -e $conf->{path}{exe}{$exe})
{
$bad = 1;
if (-e $conf->{path}{exe}{logger})
{
to_log($conf, {message => "Failed to find executable: [$exe]. Unable to proceed.", 'line' => __LINE__, level => 0});
}
else
{
warn "Failed to find executable: [$exe]. Unable to proceed.\n";
}
}
}
if ($bad)
{
exit(1);
}
exit(0); return(0);
}

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