178 lines
6.2 KiB
Puppet
178 lines
6.2 KiB
Puppet
# A system to construct files using fragments from other files or templates.
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#
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# This requires at least puppet 0.25 to work correctly as we use some
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# enhancements in recursive directory management and regular expressions
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# to do the work here.
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#
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# USAGE:
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# The basic use case is as below:
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#
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# concat{"/etc/named.conf":
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# notify => Service["named"]
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# }
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#
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# concat::fragment{"foo.com_config":
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# target => "/etc/named.conf",
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# order => 10,
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# content => template("named_conf_zone.erb")
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# }
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#
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# # add a fragment not managed by puppet so local users
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# # can add content to managed file
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# concat::fragment{"foo.com_user_config":
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# target => "/etc/named.conf",
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# order => 12,
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# ensure => "/etc/named.conf.local"
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# }
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#
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# This will use the template named_conf_zone.erb to build a single
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# bit of config up and put it into the fragments dir. The file
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# will have an number prefix of 10, you can use the order option
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# to control that and thus control the order the final file gets built in.
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#
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# SETUP:
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# The class concat::setup uses the fact concat_basedir to define the variable
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# $concatdir, where all the temporary files and fragments will be
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# durably stored. The fact concat_basedir will be set up on the client to
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# <Puppet[:vardir]>/concat, so you will be able to run different setup/flavours
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# of puppet clients.
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# However, since this requires the file lib/facter/concat_basedir.rb to be
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# deployed on the clients, so you will have to set "pluginsync = true" on
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# both the master and client, at least for the first run.
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#
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# There's some regular expression magic to figure out the puppet version but
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# if you're on an older 0.24 version just set $puppetversion = 24
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#
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# Before you can use any of the concat features you should include the
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# class concat::setup somewhere on your node first.
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#
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# DETAIL:
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# We use a helper shell script called concatfragments.sh that gets placed
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# in <Puppet[:vardir]>/concat/bin to do the concatenation. While this might
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# seem more complex than some of the one-liner alternatives you might find on
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# the net we do a lot of error checking and safety checks in the script to avoid
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# problems that might be caused by complex escaping errors etc.
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#
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# LICENSE:
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# Apache Version 2
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#
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# LATEST:
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# http://github.com/ripienaar/puppet-concat/
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#
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# CONTACT:
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# R.I.Pienaar <rip@devco.net>
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# Volcane on freenode
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# @ripienaar on twitter
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# www.devco.net
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# Sets up so that you can use fragments to build a final config file,
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#
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# OPTIONS:
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# - mode The mode of the final file
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# - owner Who will own the file
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# - group Who will own the file
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# - force Enables creating empty files if no fragments are present
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# - warn Adds a normal shell style comment top of the file indicating
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# that it is built by puppet
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# - backup Controls the filebucketing behavior of the final file and
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# see File type reference for its use. Defaults to 'puppet'
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#
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# ACTIONS:
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# - Creates fragment directories if it didn't exist already
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# - Executes the concatfragments.sh script to build the final file, this script will create
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# directory/fragments.concat. Execution happens only when:
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# * The directory changes
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# * fragments.concat != final destination, this means rebuilds will happen whenever
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# someone changes or deletes the final file. Checking is done using /usr/bin/cmp.
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# * The Exec gets notified by something else - like the concat::fragment define
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# - Copies the file over to the final destination using a file resource
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#
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# ALIASES:
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# - The exec can notified using Exec["concat_/path/to/file"] or Exec["concat_/path/to/directory"]
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# - The final file can be referened as File["/path/to/file"] or File["concat_/path/to/file"]
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define concat($mode = '0644', $owner = $::id, $group = $concat::setup::root_group, $warn = false, $force = false, $backup = 'puppet', $gnu = undef, $order='alpha') {
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$safe_name = regsubst($name, '/', '_', 'G')
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$concatdir = $concat::setup::concatdir
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$version = $concat::setup::majorversion
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$fragdir = "${concatdir}/${safe_name}"
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$concat_name = 'fragments.concat.out'
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$default_warn_message = '# This file is managed by Puppet. DO NOT EDIT.'
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case $warn {
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'true',true,yes,on: { $warnmsg = $default_warn_message }
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'false',false,no,off: { $warnmsg = '' }
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default: { $warnmsg = $warn }
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}
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$warnmsg_escaped = regsubst($warnmsg, "'", "'\\\\''", 'G')
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$warnflag = $warnmsg_escaped ? {
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'' => '',
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default => "-w '${warnmsg_escaped}'"
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}
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case $force {
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'true',true,yes,on: { $forceflag = '-f' }
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'false',false,no,off: { $forceflag = '' }
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default: { fail("Improper 'force' value given to concat: ${force}") }
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}
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case $order {
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numeric: { $orderflag = '-n' }
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alpha: { $orderflag = '' }
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default: { fail("Improper 'order' value given to concat: ${order}") }
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}
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File{
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owner => $::id,
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group => $group,
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mode => $mode,
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backup => $backup
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}
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file{$fragdir:
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ensure => directory;
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"${fragdir}/fragments":
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ensure => directory,
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recurse => true,
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purge => true,
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force => true,
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ignore => ['.svn', '.git', '.gitignore'],
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source => $version ? {
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24 => 'puppet:///concat/null',
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default => undef,
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},
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notify => Exec["concat_${name}"];
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"${fragdir}/fragments.concat":
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ensure => present;
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"${fragdir}/${concat_name}":
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ensure => present;
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$name:
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ensure => present,
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source => "${fragdir}/${concat_name}",
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owner => $owner,
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group => $group,
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checksum => md5,
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mode => $mode,
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alias => "concat_${name}";
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}
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exec{"concat_${name}":
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notify => File[$name],
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subscribe => File[$fragdir],
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alias => "concat_${fragdir}",
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require => [ File[$fragdir], File["${fragdir}/fragments"], File["${fragdir}/fragments.concat"] ],
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unless => "${concat::setup::concatdir}/bin/concatfragments.sh -o ${fragdir}/${concat_name} -d ${fragdir} -t ${warnflag} ${forceflag} ${orderflag}",
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command => "${concat::setup::concatdir}/bin/concatfragments.sh -o ${fragdir}/${concat_name} -d ${fragdir} ${warnflag} ${forceflag} ${orderflag}",
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}
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if $::id == 'root' {
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Exec["concat_${name}"]{
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user => root,
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group => $group,
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}
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}
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}
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