Puppet ethpad-lite DB backups.

Puppet will now add a cron job and configure logrotate to backup
etherpad-lite's MySQL DB daily and keep a months worth of backups.
These are the defaults and are slightly configurable through the
etherpad_lite::backup class.

Also configure log rotation for etherpad-lite's error.log and
access.log.

Change-Id: I30e0a4c8ee852e6621ee74744968d85696658608

doc/puppet_modules.rst

@@ -374,8 +374,9 @@ MySQL
 ^^^^^
 
 MySQL is configured by the Puppet module to allow user ``eplite`` to use
-database ``etherpad-lite``. This module does not configure backups for the
-``etherpad-lite`` database.
+database ``etherpad-lite``. If you want backups for the ``etherpad-lite``
+database you can include ``etherpad_lite::backup``. By default this will backup
+the ``etherpad-lite`` DB daily and keep a rotation of 30 days of backups.
 
 .. rubric:: Footnotes
 .. [1] `Lodgeit homepage <http://www.pocoo.org/projects/lodgeit/>`_

manifests/site.pp

@@ -396,6 +396,7 @@ node 'etherpadlite.openstack.org' {
   }
   include etherpad_lite::site
   include etherpad_lite::mysql
+  include etherpad_lite::backup
 }
 
 # A bare machine, but with a jenkins user

modules/etherpad_lite/manifests/backup.pp

@@ -0,0 +1,26 @@
+class etherpad_lite::backup (
+  $minute      = '0',
+  $hour        = '0',
+  $day         = '*',
+  $dest        = "${etherpad_lite::base_log_dir}/${etherpad_lite::ep_user}/db.sql.gz",
+  $rotation    = 'daily',
+  $num_backups = '30'
+) {
+
+  cron { eplitedbbackup:
+    ensure  => present,
+    command => "/usr/bin/mysqldump --defaults-file=/etc/mysql/debian.cnf --opt etherpad-lite | gzip -9 > ${dest}",
+    minute  => $minute,
+    hour    => $hour,
+    weekday => $day,
+    require => Package['mysql-server']
+  }
+
+  include logrotate
+  logrotate::file { 'eplitedb':
+    log     => $dest,
+    options => ['nocompress', 'missingok', "rotate ${num_backups}", $rotation],
+    require => Cron['eplitedbbackup']
+  }
+
+}

modules/etherpad_lite/manifests/site.pp

@@ -38,4 +38,17 @@ class etherpad_lite::site (
     require => Class['etherpad_lite']
   }
 
+  include logrotate
+  logrotate::file { 'epliteerror':
+    log     => "${etherpad_lite::base_log_dir}/${etherpad_lite::ep_user}/error.log",
+    options => ['compress', 'delaycompress', 'missingok', 'rotate 7', 'daily', 'notifempty'],
+    require => Service['etherpad-lite']
+  }
+
+  logrotate::file { 'epliteaccess':
+    log     => "${etherpad_lite::base_log_dir}/${etherpad_lite::ep_user}/access.log",
+    options => ['compress', 'delaycompress', 'missingok', 'rotate 7', 'daily', 'notifempty'],
+    require => Service['etherpad-lite']
+  }
+
 }