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#
# General backup conventions and definitions according to
# http://padrao.sarava.org/trac/wiki/Backups/Convencoes
#
# This module is distributed under the GNU Affero General Public License:
# 
# Backup module for puppet
# Copyright (C) 2009 Sarava Group
# 
# 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 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/>.

# backup folder
$backupdir        = "/var/backups"
$backupdir_remote = "$backupdir/remote"

# for data that's going to be encrypted and signed
$backup_include_unencrypted = [ "/etc", "/var", "/home", ]
$backup_exclude_unencrypted = [ "$backupdir_remote", "$backupdir/duplicity", "$backupdir/restore", "/var/cache", "/var/log", "/var/vservers", "/var/chroot", "/root/.cache", "/var/lib/dpkg", "/var/lib/apt", "/var/lib/aptitude/" ]

# for data that were previously encrypted and signed
$backup_include_encrypted = [ "$backupdir/duplicity", ]
$backup_exclude_encrypted = [ "$backupdir/duplicity/.ssh", ]

class backup {

  include backupninja::server
  include backupninja::client::duplicity
  include backupninja::client::rdiff_backup

  package { "debconf-utils": ensure => installed, }
  package { "hwinfo":        ensure => installed, }

  case $backup_when {
    '': { $backup_when = 'everyday at 01:00' }
  }

  backupninja::config { "conf":
  	loglvl    => 4,
  	usecolors => false,
    when      => $backup_when,
  }

  file { "$backupdir_remote":
    ensure => directory,
    owner  => root,
    group  => root,
    mode   => 0755,
  }

  file { "/var/log/backup":
    ensure => directory,
    owner  => root,
    group  => root,
    mode   => 0755,
  }

  file { "/etc/logrotate.d/backup":
    ensure => present,
    owner  => root,
    group  => root,
    mode   => 0644,
    source => "puppet://$server/modules/backup/logrotate.d/backup",
  }

  # rdiff-check script
  file { "/usr/local/sbin/rdiff-check":
    content => template('backup/rdiff-check.sh.erb'),
    owner   => root,
    group   => root,
    mode    => 0755,
    ensure  => present,
  }

  # check rdiff-backups once a week
  cron { "rdiff_check":
    command  => "/usr/local/sbin/rdiff-check",
    user     => root,
    hour     => "0",
    minute   => "0",
    weekday  => "0",
    ensure   => present,
    require  => File['/usr/local/sbin/rdiff-check'],
  }

  # rsync-check script
  file { "/usr/local/sbin/rsync-check":
    content => template('backup/rsync-check.sh.erb'),
    owner   => root,
    group   => root,
    mode    => 0755,
    ensure  => present,
  }

  # check rsync-backups once a week
  cron { "rsync_check":
    command  => "/usr/local/sbin/rsync-check",
    user     => root,
    hour     => "0",
    minute   => "0",
    weekday  => "0",
    ensure   => present,
    require  => File['/usr/local/sbin/rsync-check'],
  }

  # we have to keep that as we have custom changes that
  # might not be merged and released in backupninja
  file { "/usr/share/backupninja/rsync":
    ensure  => present,
    owner   => "root",
    group   => "root",
    mode    => 0644,
    source  => "puppet://$server/modules/backup/handlers/rsync",
  }

  # sync-backups script
  file { "/usr/local/sbin/sync-backups":
    owner   => root,
    group   => root,
    mode    => 0755,
    ensure  => present,
    source  => "puppet://$server/modules/backup/sync-backups",
  }

  # default backupninja::rdiff configuration
  define rdiff($port = '22', $ensure = present, $installkey = true) {
    backupninja::rdiff { "rdiff-$title.$domain":
      ensure         => $ensure,
      options        => "--remote-schema 'ssh -p $port -C %s rdiff-backup --server'",
      # [source]
      keep           => "10",
      include        => $backup_include_encrypted,
      exclude        => $backup_exclude_encrypted,
      # [dest]
      type           => "remote",
      host           => "$title.$domain",
      home           => "$backupdir/remote/$fqdn",
      subfolder      => "rdiff",
      user           => "$hostname",
      sshoptions     => "-p $port",
      installkey     => $installkey,
      backupkeytype  => "rsa",
      backupkeystore => "puppet:///modules/site-keys",
    }
  }

  define rsync($port = '22', $ensure = present, $installkey = true, $bandwidthlimit = false) {
    backupninja::rsync { "rsync-$title.$domain":
      # [general]
      ensure         => $ensure,
      installkey     => $installkey,
      home           => "$backupdir/remote/$fqdn",
      backupdir      => "$backupdir/remote/$fqdn/rsync",
      backupkeytype  => "rsa",
      id_file        => "/root/.ssh/id_rsa",
      backupkeystore => "puppet:///modules/site-keys",
      keepdaily      => '4',
      keepweekly     => '2',
      keepmonthly    => '2',
      format         => 'long',
      log            => "/var/log/backup/rsync-$title.$domain.log",
      lockfile       => "/var/lock/rsync-$title.$domain.lock",
      # [source]
      include        => $backup_include_encrypted,
      exclude        => $backup_exclude_encrypted,
      # [dest]
      user           => "$hostname",
      host           => "$title.$domain",
      port           => $port,
      bandwidthlimit => $bandwidthlimit,
      compress       => '1',
      testconnect    => 'yes',
    }
  }

  # local backups using duplicity
  define duplicity($encryptkey = false,
                   $password = false,
                   $order = 50,
                   $ensure = present,
                   $full_if_older_than = "1M",
                   $remove_older_than = "45D",
                   $remove_all_but_n_full = "1",
                   $periodic_check = absent,
                   $directory = "${backupdir}/duplicity") {

    case $encryptkey { false: { err("need to define a key!") } }
    case $password { false: { err("need to define password!") } }

    include backupninja::client

    # backup dest folder
    file { "$backupdir/duplicity":
      ensure  => directory,
      owner   => "root",
      group   => "root",
    }

    # the backupninja rule for this duplicity backup
    file { "${backupninja::client::defaults::configdir}/${order}_duplicity-${title}.sh":
      ensure  => $ensure,
      content => template('backup/dup.conf.erb'),
      owner   => root,
      group   => root,
      mode    => 0600,
      require => File["${backupninja::client::defaults::configdir}"],
    }

    # check duplicity backups once a week
    cron { "duplicity_check-$title.$domain":
      command  => "/bin/bash ${backupninja::client::defaults::configdir}/${order}_duplicity-${title}.sh --check",
      user     => root,
      hour     => "0",
      minute   => "0",
      weekday  => "0",
      ensure   => $periodic_check,
    }
  }
}