Enable LVM block storage

Available since MOSK 21.3 TechPreview

Note

Consider this section as part of Deploy an OpenStack cluster.

This section instructs you on how to configure LVM as a back end for the OpenStack Block Storage service.

To enable LVM block storage:

1. Open BareMetalHostProfile for editing.

2. In the spec:volumeGroups section, specify the following data for the OpenStack compute nodes. In the following example, we deploy a Cinder volume with LVM on compute nodes. However, you can use dedicated nodes for this purpose.

   spec:
     devices:
       - device:
           byName: /dev/nvme0n1
           minSizeGiB: 30
           wipe: true
         partitions:
           - name: lvm_cinder_vol
             sizeGiB: 0
             wipe: true
     volumeGroups:
       - devices:
         - partition: lvm_cinder_vol
         name: cinder-vol
     logicalVolumes:
       - name: cinder-fake
         vg: cinder-vol
         sizeGiB: 0.1
     fileSystems:
       - fileSystem: ext4
         logicalVolume: cinder-fake
         mountPoint: /cinder-fake
   

   Note

   Due to a limitation, volume groups cannot be created without logical volumes and formatted partitions. Therefore, set the logicalVolumes:name, fileSystems:logicalVolume, and fileSystems:mountPoint parameters to cinder-fake.

   For details about BareMetalHostProfile, see Mirantis Container Cloud Operations Guide: Create a custom bare metal host profile.

3. Configure the OpenStackDeployment CR to deploy OpenStack with LVM block storage. For example:

   spec:
     nodes:
       openstack-compute-node::enabled:
         features:
           cinder:
             volume:
               backends:
                 lvm:
                   lvm:
                     volume_group: "cinder-vol"