I''m trying to use a puppet manifest to set up a series of backup jobs
on
servers which are each running a variety of mysql databases. My manifest
currently looks something like this, which almost works:
class backups () {
Cron {
ensure => present,
user => root,
}
$remote_dest =
[''zx2:/data/src/backups'',''zx3:/data/backups'']
if $hostname == "www" {
$databases =
[''phpbb3'',''wikidb'',''rt4'',''wordpress'']
$bkp_dest = "/data/backup"
elsif...
:
}
cron { $databses:
command => "mysqldump --user admin $databases | gzip >
mysql-$databases-`date +%Y%m%d`.gz",
hour => 1,
minute => 20,
}
cron { $remote_dest:
command => "rsync -arzv $bkp_dest $remote_dest",
hour => 4,
minute => 40,
}
}
I get the right number of cron jobs built, but when the array variables are
quoted, I get the contents all concatenated together. What I''d like is
to
simulate a "for x in array" kind of construct. Is that possible using
puppet? I''d rather not have to build this and specify each job by hand,
which seems really clunky given the elegance of the tool. I''m sure
I''m just
not seeing something.
Thanks!
Bret
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For completeness, I solved this myself by using a template instead of
trying to do this all within a manifest:
#!/bin/sh
<% databases.each do |db| -%>
<%= "mysqldump --user admin #{db} | gzip > mysql-#{db}-`date
+%Y%m%d`.gz" %>
<% end -%>
<% remote_dest.each do |rd| -%>
<%= "rsync -arzv #{bkp_dest} #{rd}" %>
<% end -%>
And the manifest then simplifies to:
file { "backup-script":
ensure => present,
path => $mysql-backup-script,
content => template(''backups/backup-mysql.erb''),
mode => 744,
owner => "root",
group => "root",
}
cron { "backup-mysql":
command => $mysql-backup-script,
hour => 1,
minute => 20,
require => File[''backup-script''],
}
On Tuesday, July 23, 2013 1:32:43 PM UTC-4, Bret Wortman
wrote:>
> I''m trying to use a puppet manifest to set up a series of backup
jobs on
> servers which are each running a variety of mysql databases. My manifest
> currently looks something like this, which almost works:
>
> class backups () {
>
> Cron {
> ensure => present,
> user => root,
> }
>
> $remote_dest =
[''zx2:/data/src/backups'',''zx3:/data/backups'']
>
> if $hostname == "www" {
> $databases =
[''phpbb3'',''wikidb'',''rt4'',''wordpress'']
> $bkp_dest = "/data/backup"
> elsif...
> :
> }
>
> cron { $databses:
> command => "mysqldump --user admin $databases | gzip >
> mysql-$databases-`date +%Y%m%d`.gz",
> hour => 1,
> minute => 20,
> }
>
> cron { $remote_dest:
> command => "rsync -arzv $bkp_dest $remote_dest",
> hour => 4,
> minute => 40,
> }
> }
>
> I get the right number of cron jobs built, but when the array variables
> are quoted, I get the contents all concatenated together. What I''d
like is
> to simulate a "for x in array" kind of construct. Is that
possible using
> puppet? I''d rather not have to build this and specify each job by
hand,
> which seems really clunky given the elegance of the tool. I''m sure
I''m just
> not seeing something.
>
> Thanks!
>
>
> Bret
>
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On Tuesday, July 23, 2013 12:32:43 PM UTC-5, Bret Wortman wrote:> > I''m trying to use a puppet manifest to set up a series of backup jobs on > servers which are each running a variety of mysql databases. My manifest > currently looks something like this, which almost works: > > class backups () { > > Cron { > ensure => present, > user => root, > } > > $remote_dest = [''zx2:/data/src/backups'',''zx3:/data/backups''] > > if $hostname == "www" { > $databases = [''phpbb3'',''wikidb'',''rt4'',''wordpress''] > $bkp_dest = "/data/backup" > elsif... > : > } > > cron { $databses: > command => "mysqldump --user admin $databases | gzip > > mysql-$databases-`date +%Y%m%d`.gz", > hour => 1, > minute => 20, > } > > cron { $remote_dest: > command => "rsync -arzv $bkp_dest $remote_dest", > hour => 4, > minute => 40, > } > } > > I get the right number of cron jobs built, but when the array variables > are quoted, I get the contents all concatenated together. >Yes, that is what you get when you convert an array to a string.> What I''d like is to simulate a "for x in array" kind of construct. Is that > possible using puppet? I''d rather not have to build this and specify each > job by hand, which seems really clunky given the elegance of the tool. I''m > sure I''m just not seeing something. >There is the template approach you discovered, when it is applicable. The more general approach is to use a defined type in conjunction with Puppet''s shorthand for declaring multiple resources based on an array of their titles. You''re example code is heading in the right direction. Here''s how a working version might look: define backups::database () { cron { "backup_database_${title}": ensure => present, user => root, command => "mysqldump --user admin ${title} | gzip > mysql-${title}-`date +%Y%m%d`.gz", hour => 4, minute => 40, } } define backups::remote () { cron { "backup_remote_dest_${title}": ensure => present, user => root, command => "rsync -arzv ${backups::bkp_dest} ${title}", hour => 1, minute => 20, } } class backups { # ... # Set variables, including $databases, $bkp_dest, and $remote_dest # ... backups::database { $databases: } backups::remote { $remote_dest: } } Note the use of the automatic $title variable inside the definitions to refer to the title of the defined type instance. You can declare other parameters to the definition, too, but as used in the example, all instances would get the same values for those parameters. There are ways to be cleverer about that sort of thing, once you have a hold of what''s going on. John -- You received this message because you are subscribed to the Google Groups "Puppet Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to puppet-users+unsubscribe@googlegroups.com. To post to this group, send email to puppet-users@googlegroups.com. Visit this group at http://groups.google.com/group/puppet-users. For more options, visit https://groups.google.com/groups/opt_out.
Bret Wortman
2013-Jul-29 18:25 UTC
Re: [Puppet Users] Re: Array use as loop-type construct?
Oooooh. I''ve never really grokked the defined type stuff. I can see now I need to dig in and make sense of it. Thanks, John! * * *Bret Wortman* <http://damascusgrp.com/> http://damascusgrp.com/ <http://bretwortman.com/> http://about.me/wortmanbret On Mon, Jul 29, 2013 at 1:19 PM, jcbollinger <John.Bollinger@stjude.org>wrote:> > > On Tuesday, July 23, 2013 12:32:43 PM UTC-5, Bret Wortman wrote: >> >> I''m trying to use a puppet manifest to set up a series of backup jobs on >> servers which are each running a variety of mysql databases. My manifest >> currently looks something like this, which almost works: >> >> class backups () { >> >> Cron { >> ensure => present, >> user => root, >> } >> >> $remote_dest = [''zx2:/data/src/backups'',''zx3:**/data/backups''] >> >> if $hostname == "www" { >> $databases = [''phpbb3'',''wikidb'',''rt4'',''**wordpress''] >> $bkp_dest = "/data/backup" >> elsif... >> : >> } >> >> cron { $databses: >> command => "mysqldump --user admin $databases | gzip > >> mysql-$databases-`date +%Y%m%d`.gz", >> hour => 1, >> minute => 20, >> } >> >> cron { $remote_dest: >> command => "rsync -arzv $bkp_dest $remote_dest", >> hour => 4, >> minute => 40, >> } >> } >> >> I get the right number of cron jobs built, but when the array variables >> are quoted, I get the contents all concatenated together. >> > > > Yes, that is what you get when you convert an array to a string. > > > >> What I''d like is to simulate a "for x in array" kind of construct. Is >> that possible using puppet? I''d rather not have to build this and specify >> each job by hand, which seems really clunky given the elegance of the tool. >> I''m sure I''m just not seeing something. >> > > > There is the template approach you discovered, when it is applicable. The > more general approach is to use a defined type in conjunction with Puppet''s > shorthand for declaring multiple resources based on an array of their > titles. You''re example code is heading in the right direction. Here''s how > a working version might look: > > define backups::database () { > cron { "backup_database_${title}": > > ensure => present, > user => root, > command => "mysqldump --user admin ${title} | gzip > > mysql-${title}-`date +%Y%m%d`.gz", > hour => 4, > minute => 40, > } > } > > define backups::remote () { > cron { "backup_remote_dest_${title}": > > ensure => present, > user => root, > command => "rsync -arzv ${backups::bkp_dest} ${title}", > hour => 1, > minute => 20, > } > } > > class backups { > # ... > # Set variables, including $databases, $bkp_dest, and $remote_dest > # ... > > backups::database { $databases: } > backups::remote { $remote_dest: } > } > > Note the use of the automatic $title variable inside the definitions to > refer to the title of the defined type instance. You can declare other > parameters to the definition, too, but as used in the example, all > instances would get the same values for those parameters. There are ways > to be cleverer about that sort of thing, once you have a hold of what''s > going on. > > > John > > -- > You received this message because you are subscribed to a topic in the > Google Groups "Puppet Users" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/puppet-users/rm1wx3s4ZiE/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > puppet-users+unsubscribe@googlegroups.com. > To post to this group, send email to puppet-users@googlegroups.com. > Visit this group at http://groups.google.com/group/puppet-users. > For more options, visit https://groups.google.com/groups/opt_out. > > >-- You received this message because you are subscribed to the Google Groups "Puppet Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to puppet-users+unsubscribe@googlegroups.com. To post to this group, send email to puppet-users@googlegroups.com. Visit this group at http://groups.google.com/group/puppet-users. For more options, visit https://groups.google.com/groups/opt_out.