puppet-tripleo/manifests/pacemaker/haproxy_with_vip.pp

# Copyright 2016 Red Hat, Inc.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#
# == Define: tripleo::pacemaker::haproxy_with_vip
#
# Configure the vip with the haproxy under pacemaker
#
# === Parameters:
#
# [*vip_name*]
#  (String) Logical name of the vip (control, public, storage ...)
#  Required
#
# [*ip_address*]
#  (String) IP address on which HAProxy is colocated
#  Required
#
# [*location_rule*]
#  (optional) Add a location constraint before actually enabling
#  the resource. Must be a hash like the following example:
#  location_rule => {
#    resource_discovery => 'exclusive',    # optional
#    role               => 'master|slave', # optional
#    score              => 0,              # optional
#    score_attribute    => foo,            # optional
#    # Multiple expressions can be used
#    expression         => ['opsrole eq controller']
#  }
#  Defaults to undef
#
# [*pcs_tries*]
#   (Optional) The number of times pcs commands should be retried.
#   Defaults to 1
#
# [*ensure*]
#  (Boolean) Create the all the resources only if true.  False won't
#  destroy the resource, it will just not create them.
#  Default to true
#
define tripleo::pacemaker::haproxy_with_vip(
  $vip_name,
  $ip_address,
  $location_rule = undef,
  $pcs_tries     = 1,
  $ensure        = true)
{
  if($ensure) {
    if !is_ip_addresses($ip_address) {
      fail("Haproxy VIP: ${ip_address} is not a proper IP address.")
    }
    # NB: Until the IPaddr2 RA has a fix for https://bugzilla.redhat.com/show_bug.cgi?id=1445628
    # we need to specify the nic when creating the ipv6 vip.
    if is_ipv6_address($ip_address) {
      $netmask        = '128'
      $nic            = interface_for_ip($ip_address)
      $ipv6_addrlabel = '99'
    } else {
      $netmask        = '32'
      $nic            = ''
      $ipv6_addrlabel = ''
    }

    $haproxy_in_container = hiera('haproxy_docker', false)
    $constraint_target_name = $haproxy_in_container ? {
      true => 'haproxy-bundle',
      default => 'haproxy-clone'
    }

    pacemaker::resource::ip { "${vip_name}_vip":
      ip_address     => $ip_address,
      cidr_netmask   => $netmask,
      nic            => $nic,
      ipv6_addrlabel => $ipv6_addrlabel,
      meta_params    => 'resource-stickiness=INFINITY',
      location_rule  => $location_rule,
      tries          => $pcs_tries,
    }

    pacemaker::constraint::order { "${vip_name}_vip-then-haproxy":
      first_resource    => "ip-${ip_address}",
      second_resource   => $constraint_target_name,
      first_action      => 'start',
      second_action     => 'start',
      constraint_params => 'kind=Optional',
      tries             => $pcs_tries,
    }
    pacemaker::constraint::colocation { "${vip_name}_vip-with-haproxy":
      source => "ip-${ip_address}",
      target => $constraint_target_name,
      score  => 'INFINITY',
      tries  => $pcs_tries,
    }

    $service_resource = $haproxy_in_container ? {
      true => Pacemaker::Resource::Bundle['haproxy-bundle'],
      default => Pacemaker::Resource::Service['haproxy']
    }

    Pacemaker::Resource::Ip["${vip_name}_vip"]
      -> $service_resource
        -> Pacemaker::Constraint::Order["${vip_name}_vip-then-haproxy"]
          -> Pacemaker::Constraint::Colocation["${vip_name}_vip-with-haproxy"]
  }
}