Role for configuring Highly Available LVM (HA-LVM) in rgmanager/pacemaker cluster

RHEL: It is expected that machines will already be registered and subscribed for access to 'High Availability' or 'Resilient storage' channels. CentOS 5.xx: requires installation of python-simplejson.x86_64 package prior to ansible run.

• path to device shared between nodes, the path must be same on both nodes

  shared_drive: '/dev/disk/by-path/ip-192.168.34.153:3260-iscsi-iqn.1994-05.com.redhat:target-lun-0'
  

• name of VG that will be clustered between nodes

  cluster_vg_name: "cluster_vg"
  

• type of HA-LVM, possible options are 'tagging' or 'clvm'. Default is 'tagging'

  HALVMtype: "tagging"
  

• list of VGs enclosed in '"' and separated by ','. This will become part of 'volume_list' variable in /etc/lvm/lvm.conf and must end with ','!. NOTE: this setting is ignored whe the HALVMtype is 'clvm' as the 'volume_list' gets commented out.

  local_volume_list: '"c6vg",'
  

• (EL6 with tagging) type of running cluster is required to determine correct volume_list. Only 2 possible options are 'pacemaker' and 'rgmanager'. Default is unset.

  cluster_type: 'rgmanager'
  

• (RHEL only) enable the repositories containint packages needed

  enable_repos: true
  

• (RHEL only) enable the extended update (EUS) repositories containint packages needed

  enable_eus_repos: false
  

Example playbook for tagging HA-LVM with VG name 'cluster_vg' and with single local VG named 'c6vg'.

- hosts: servers
  roles:
     - { role: "OndrejHome.ha-cluster-lvm", HALVMtype: "tagging", local_volume_list: '"c6vg"', cluster_vg_name: "cluster_vg", shared_drive: '/dev/disk/by-path/ip-192.168.34.153:3260-iscsi-iqn.1994-05.com.redhat:target-lun-0' } 

Example playbook for clvm variant of HA-LVM.

- hosts: servers
  roles:
     - { role: "OndrejHome.ha-cluster-lvm", HALVMtype: "clvm", cluster_vg_name: "cluster_vg", shared_drive: '/dev/disk/by-path/ip-192.168.34.153:3260-iscsi-iqn.1994-05.com.redhat:target-lun-0' }

GPLv3

WARNING: this is alpha-version quality proof-of-concept role that still needs some polishing. This is suitable for testing purposes only.

To get in touch with author you can use email [email protected] or create a issue on github when requesting some feature.