ha_cluster_lvm_rgmanager

Role for enabling Highly Available LVM (HA-LVM) configuration in rgmanager cluster. This role can also create LVs and VGs for both tagging and clvm variant, check the examples to see how.

This role is aimed at (this moment pretty old) rgmanager clusters only. For pacemaker cluster role check out the ondrejhome.ha-cluster-lvm role instead.

Requirements

RHEL: It is expected that machines will already be registered and subscribed for access to 'High Availability' or 'Resilient storage' channels.

Role Variables

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

  HALVMtype: 'tagging'
  

• (optional) - this is applied only when 'tagging' mode is selected. List of VGs that should be included in 'volume_list' additionally to VG on which root filesystem resides. By default this list is empty, below example shows how to specify the list of VGs.

  local_vg_list: [ 'vg1', 'vg2' ]
  

• (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

Example playbook for tagging HA-LVM. No LV creation.

- hosts: servers
  roles:
     - { role: 'ondrejhome.ha_cluster_lvm_rgmanager' }

Example playbook for tagging HA-LVM with extra local VG names 'vg_local'. No LV creation.

- hosts: servers
  roles:
     - { role: 'ondrejhome.ha_cluster_lvm_rgmanager', local_vg_list: [ 'vg_local' ] }

Example playbook for clvm variant of HA-LVM. No LV creation.

- hosts: servers
  roles:
     - { role: 'ondrejhome.ha_cluster_lvm_rgmanager', HALVMtype: 'clvm' }

Example of playbook for tagged variant with one VG and one LV on shared VG.

- hosts: servers
  vars:
    tagging_vgs:
      - name: 'vg_shared'
        pvs: '/dev/sdb'
        lvs:
          - name: 'lv_name1'
            size: '200M'
  roles:
     - { role: 'ondrejhome.ha_cluster_lvm_rgmanager' }

Example of playbook for clvm variant with one VG and one LV on shared VG. IMPORTANT: shared clvm VG must be included in the 'local_vg_list' list, otherwise it won't be possible to create LVs on it.

- hosts: servers
  vars:
    local_vg_list:
      - 'vg_clvm'
    clvm_vgs:
      - name: 'vg_clvm'
        pvs: '/dev/sdb'
        lvs:
          - name: 'lv_name2'
            size: '200M'
  roles:
     - { role: 'ondrejhome.ha_cluster_lvm_rgmanager', HALVMtype: 'clvm' }

Example playbook for clvm variant combined with tagging variant and creation of VGs/LVs for both clustered and tagging VGs.

- hosts: servers
  vars:
    local_vg_list:
      - 'vg_clvm'
    clvm_vgs:
      - name: 'vg_clvm'
        pvs: '/dev/sdb'
        lvs:
          - name: 'lv_name3'
            size: '200M'
          - name: 'lv_name4'
            size: '100M'
    tagging_vgs:
      - name: 'vg_shared'
        pvs: '/dev/sdc'
        lvs:
          - name: 'lv_name5'
            size: '200M'
          - name: 'lv_name6'
            size: '100M'
  roles:
     - { role: 'ondrejhome.ha_cluster_lvm_rgmanager', HALVMtype: 'clvm' }

License

GPLv3

Author Information

• 2022-09: role was tested with all examples from this README on CentOS 6.10 and RHEL 6.10.

To get in touch with author you can use email ondrej-xa2iel8u@famera.cz or create a issue on github when requesting some feature.