Paul Bastide

odf: Disk type is not compatible with the selected backing storage

Written by

Paul Bastide

in

Here is how I worked around Disk type is not compatible with the selected backing storage:

  1. Encoded the queue/rotational = 0
cat << EOF | base64 -w0
ACTION=="add|change", SUBSYSTEM=="block", KERNEL=="dm-[1,3]",  ATTR{queue/rotational}="0"
EOF

Encoded

QUNUSU9OPT0iYWRkfGNoYW5nZSIsIFNVQlNZU1RFTT09ImJsb2NrIiwgS0VSTkVMPT0iZG0tWzEsM10iLCAgQVRUUntxdWV1ZS9yb3RhdGlvbmFsfT0iMCIK
  1. Create the MachineConfig – 99-worker-udev-non-rotational
cat << EOF > ./99-worker-udev-configuration.yaml
apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: worker
  name: 99-worker-udev-non-rotational
spec:
  config:
    ignition:
      version: 3.2.0  
    storage:
      files:
      - contents:
          source: data:text/plain;charset=utf-8;base64,QUNUSU9OPT0iYWRkfGNoYW5nZSIsIFNVQlNZU1RFTT09ImJsb2NrIiwgS0VSTkVMPT0iZG0tWzEsM10iLCAgQVRUUntxdWV1ZS9yb3RhdGlvbmFsfT0iMCIK
          verification: {}
        filesystem: root
        mode: 420
        path: /etc/udev/rules.d/99-worker-udev-non-rotational.rules
EOF
oc apply -f 99-worker-udev-configuration.yaml

Check the MachineConfigPool/worker, and then proceeded with the setup.

Yamls

Here are the YAMLs:

apiVersion: local.storage.openshift.io/v1alpha1
kind: LocalVolumeDiscovery
metadata:
  name: auto-discover-devices
  namespace: openshift-local-storage
spec:
  nodeSelector:
    nodeSelectorTerms:
      - matchExpressions:
          - key: kubernetes.io/hostname
            operator: In
            values:
              - worker1.removed
              - worker2.removed
              - worker3.removed

apiVersion: local.storage.openshift.io/v1alpha1
kind: LocalVolumeSet
metadata:
  name: lvs-san-x
  namespace: openshift-local-storage
spec:
  deviceInclusionSpec:
    deviceTypes:
      - disk
      - part
      - mpath
    minSize: 1Gi
  nodeSelector:
    nodeSelectorTerms:
      - matchExpressions:
          - key: kubernetes.io/hostname
            operator: In
            values:
              - worker1.removed
              - worker2.removed
              - worker3.removed
  storageClassName: lvs-san-x
  volumeMode: Block

References

1. Override device rotational flag in OCS/ODF environments https://access.redhat.com/articles/6547891

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