Verify Ceph cluster state

To verify the state of a Ceph cluster, Ceph Controller provides special sections in KaaSCephCluster.status. The resource contains information about the state of the Ceph cluster components, their health, and potentially problematic components.

To verify the Ceph cluster state from a managed cluster:

  1. Obtain kubeconfig of a managed cluster and provide it as an environment variable:

    export KUBECONFIG=<pathToManagedKubeconfig>
    
  2. Obtain the MiraCeph resource in YAML format:

    kubectl -n ceph-lcm-mirantis get miraceph -o yaml
    

    Information from MiraCeph.status is passed to the miraCephInfo section of the KaaSCephCluster CR. For details, see KaaSCephCluster.status miraCephInfo specification.

  3. Obtain the MiraCephLog resource in YAML format:

    kubectl -n ceph-lcm-mirantis get miracephlog -o yaml
    

    Information from MiraCephLog is passed to the fullClusterInfo and shortClusterInfo sections of the KaaSCephCluster CR. For details, see KaaSCephCluster.status shortClusterInfo specification and KaaSCephCluster.status fullClusterInfo specification.

To verify the Ceph cluster state from a management cluster:

Ceph changes in Container Cloud 2.20

  • Since Container Cloud 2.20.0, the Ceph cluster does not deploy on management and regional clusters to reduce resource consumption.

  • Ceph cluster is automatically removed from existing management and regional clusters during the Container Cloud update to 2.20.0.

  • Managed clusters continue using Ceph as a distributed storage system.

  1. Obtain the KaaSCephCluster resource in the YAML format:

    kubectl -n <projectName> get kaascephcluster -o yaml
    

    Substitute <projectName> with the project name of the managed or management cluster to which the required Ceph cluster belongs.

  2. Verify the state of the required component using KaaSCephCluster.status description.