mk-ansible-roles.disk-init

disk-init

This role is used to add new disks to LVM Groups (Logical Volume Management). It is designed to avoid adding the same disk multiple times. However, it doesn't remove disks from a disk group or clean up disks that already have a valid LVM signature (made by the command pvcreate).

Requirements

It has been tested on RHEL EL7 but should work on CentOS 6, 7, EL7, and Fedora. The system needs to be properly subscribed to install the necessary disk management packages (gdisk, sg3_utils, lvm2).

Role Variables

To set up disks on a system, you need to define the following variables in your playbook:

disks:
  <devicepath1> : <volumegroup>
  <devicepath2> : <volumegroup>
  ...

logvols:
   <logical_volume_name1>:
         size: <size>
         vol: <volumegroup>
         mountpoint: <mountpoint>
         pvs: <devicepath> (optional, if you want to specify the location of the volume)
         fstype: xfs (optional, defaults to xfs)
         opts: -b 4096 (optional parameters for mounting)
    <logical_volume_name2>:
         size: <size>
         vol: <volumegroup>
         mountpoint: <mountpoint>
         pvs: <devicepath> (optional, if you want to specify the location of the volume)
         fstype: xfs (optional, defaults to xfs)
         opts: -b 4096 (optional parameters for mounting)
    ....

Example Playbook

This is an example playbook that adds two disks to the volume group vg00 and adds another one to the existing root volume group:

- hosts: servers
  remote_user: root

  vars:
      disks:
              /dev/vdc: vg00
              /dev/vdb: vg00
              /dev/vdd: root_vg

      logvols:
              hana_shared:
                      size: 24G
                      vol: vg00
                      mountpoint: /hana/shared
              hana_data:
                      size: 24G
                      vol: vg00
                      mountpoint: /hana/data
              hana_logs:
                      size: 12G
                      vol: vg00
                      mountpoint: /hana/logs
                      pvs: /dev/vdc
              usr_sap:
                      size: 49G
                      vol: vg00
                      mountpoint: /usr/sap
                      fstype: xfs
                      opts: -b4096
              install:
                      size: 100G
                      vol: root_vg
                      mountpoint: /install
                      fstype: ext4

  roles:
     - { role: mk-ansible-roles.disk-init }