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# Simple? gluster module by James
# Copyright (C) 2010-2012 James Shubin
# Written by James Shubin <james@shubin.ca>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
define gluster::volume(
$bricks = [],
$transport = 'tcp',
$replica = 1,
$stripe = 1,
$start = undef # start volume ? true, false (stop it) or undef
) {
# TODO: if using rdma, maybe we should pull in the rdma package... ?
$valid_transport = $transport ? {
'rdma' => 'rdma',
'tcp,rdma' => 'tcp,rdma',
default => 'tcp',
}
$valid_replica = $replica ? {
'1' => '',
default => "replica ${replica} ",
}
$valid_stripe = $stripe ? {
'1' => '',
default => "stripe ${stripe} ",
}
#Gluster::Brick[$bricks] -> Gluster::Volume[$name] # volume requires bricks
# get the bricks that match our fqdn, and append /$name to their path.
# return only these paths, which can be used to build the volume dirs.
$volume_dirs = split(inline_template("<%= bricks.find_all{|x| x.split(':')[0] == '${fqdn}' }.collect {|y| y.split(':')[1].chomp('/')+'/${name}' }.join(' ') %>"), ' ')
file { $volume_dirs:
ensure => directory, # make sure this is a directory
recurse => false, # don't recurse into directory
purge => false, # don't purge unmanaged files
force => false, # don't purge subdirs and links
before => Exec["gluster-volume-create-${name}"],
require => Gluster::Brick[$bricks],
}
# add /${name} to the end of each: brick:/path entry
$brick_spec = inline_template("<%= bricks.collect {|x| ''+x.chomp('/')+'/${name}' }.join(' ') %>")
# EXAMPLE: gluster volume create test replica 2 transport tcp annex1.example.com:/storage1a/test annex2.example.com:/storage2a/test annex3.example.com:/storage3b/test annex4.example.com:/storage4b/test annex1.example.com:/storage1c/test annex2.example.com:/storage2c/test annex3.example.com:/storage3d/test annex4.example.com:/storage4d/test
# NOTE: this should only happen on one host
# FIXME: there might be a theoretical race condition if this runs at
# exactly the same time time on more than one host.
# FIXME: this should probably fail on at least N-1 nodes before it
# succeeds because it probably shouldn't work until all the bricks are
# available, which per node will happen right before this runs.
exec { "/usr/sbin/gluster volume create ${name} ${valid_replica}${valid_stripe}transport ${valid_transport} ${brick_spec}":
logoutput => on_failure,
unless => "/usr/sbin/gluster volume list | /bin/grep -qxF '${name}' -", # add volume if it doesn't exist
#before => TODO?,
#require => Gluster::Brick[$bricks],
alias => "gluster-volume-create-${name}",
}
# TODO:
#if $shorewall {
# shorewall::rule { 'gluster-TODO':
# rule => "
# ACCEPT ${zone} $FW tcp 24009:${endport}
# ",
# comment => 'TODO',
# before => Service['glusterd'],
# }
#}
if $start == true {
# try to start volume if stopped
exec { "/usr/sbin/gluster volume start ${name}":
logoutput => on_failure,
unless => "/usr/sbin/gluster volume status ${name}", # returns false if stopped
require => Exec["gluster-volume-create-${name}"],
alias => "gluster-volume-start-${name}",
}
} elsif ( $start == false ) {
# try to stop volume if running
# NOTE: this will still succeed even if a client is mounted
# NOTE: This uses `yes` to workaround the: Stopping volume will
# make its data inaccessible. Do you want to continue? (y/n)
# TODO: http://community.gluster.org/q/how-can-i-make-automatic-scripts/
# TODO: gluster --mode=script volume stop ...
exec { "/usr/bin/yes | /usr/sbin/gluster volume stop ${name}":
logoutput => on_failure,
onlyif => "/usr/sbin/gluster volume status ${name}", # returns true if started
require => Exec["gluster-volume-create-${name}"],
alias => "gluster-volume-stop-${name}",
}
} else {
# don't manage volume run state
}
}
# vim: ts=8
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