# Keepalived installer.
# Only supports one VRRP instance per server currently
# (Although keepalived supports multiple)

# Requires module: https://github.com/arioch/puppet-keepalived

# Settings for the vrrp instance.

# Note a vrrp instance refers to the behavior between two servers
# that allows the floating IP to be moved around.

# The ID to use for vrrp instance.
# Only need to change this if running more than
# one failover IP on the same network.
# Should be different for each failover IP on the same network,
# but the same for every server with the same IP.
# "1" is used by our core routers, so best to avoid it.
$vrrp_id = '10'

# What interface the instance runs on.
# (currently used for both the floating address and control multicast)
# Note multicast must be enabled on this interface!
$interface = 'eth1'

# The floating IP/CIDR to use for failvover.
$ip = '192.168.232.97/24'

# This should be MASTER on one server and BACKUP on the other.
# Unless you are running nopreempt, in which case both shoulde be BACKUP.
#$state = 'MASTER'
$state = 'BACKUP'

# This should usually be 101 on the MASTER and 100 on BACKUP
$priority = '101'
#$priority = '100'

# Set this true if the failback process is disruptive to applications
# and should be done manually.
# Probably should be true for databases.
# Should be false if there is some reason to prefer a specific machine be active.
# To failback, just restart keepalived on the machine with the IP.
# See: http://article.gmane.org/gmane.linux.keepalived.devel/1537%22
$nopreempt = true

# This should be set to a random password.
# It needs to be the same on every instance with the same $vrrp_id.
$password = 'RANDOM_PASSWORD'

# A simple bash command to check of the process that will use
# the floating IP is running.
# If this goes down, the IP should go to the other server in
# the same vrrp isntance.
$check_command = 'kill -0 `cat /var/run/mysqld/mysqld.pid`'



# end of config #
# There are lots of advanced settings if you want to muck around.
# See: https://github.com/arioch/puppet-keepalived


include keepalived

keepalived::vrrp::instance { "VRID_${vrrp_id}":
  interface         => $interface,
  state             => $state,
  virtual_router_id => $vrrp_id,
  priority          => $priority,
  auth_type         => 'PASS',
  auth_pass         => $password,
  virtual_ipaddress => [ $ip ],
  #track_interface   => ['eth1','tun0'], # optional, monitor these interfaces.
  track_script      => "VRID_${vrrp_id}_check",
}


keepalived::vrrp::script { "VRID_${vrrp_id}_check":
    script => $check_command,
}



# For RHEL, redhat makes it difficult to install keepalived.
# The package is burried in a paid add-on, so we use a 3rd party repo.
# CentOS is fine.
if($operatingsystem == 'RedHat' and $operatingsystemmajrelease == 6) {
  package { 'powerstack-release':
    ensure   => 'latest',
    provider => 'rpm',
    source   => 'http://powerstack.org/powerstack-release.rpm',
  }

  # Ignore: "Warning: Augeas[powerstack-repo-augeas](provider=augeas): Loading failed for one or more files, see debug for /augeas//error output"
  # The warning is fixed in puppet 3.5.0.
  # https://tickets.puppetlabs.com/browse/PUP-1158
  augeas { 'powerstack-repo-augeas':
    require => Package['powerstack-release'],
    before  => Package['keepalived'],
    context => '/files/etc/yum.repos.d/powerstack.repo',
    changes => [
      # This will eventually break.  See: https://fedorahosted.org/augeas/ticket/275
      'set powerstack/includepkgs keepalived',
      'set powerstack/baseurl http://download.powerstack.org/6/$basearch/',
    ],
  }
}

#package { 'keepalived': ensure => 'latest' }