Verify Ceph cluster state

Caution

This feature is available starting from the Container Cloud release 2.11.0.

Warning

This document describes how to verify the Ceph cluster state for Container Cloud version 2.11.0. For earlier Container Cloud versions, refer to Verify Ceph cluster state prior to Container Cloud 2.11.0 instead.

To verify the state of a Ceph cluster, Ceph controller provides special sections in KaaSCephCluster.status on a management cluster. 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 management cluster:

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

    export KUBECONFIG=<pathToMgmtKubeconfig>
    
  2. Obtain the KaaSCephCluster resource in YAML format:

    kubectl -n <projectName> get kaascephcluster -o yaml
    

    Substitute <projectName> with the project name of the managed or management cluster where the required Ceph cluster is placed.

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

To verify the Ceph cluster 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.