okd/roles/openshift_metrics/tasks/migrate_cassandra_pvcs.yaml

---
- name: Check to see if PVC exists in an old namespace
  oc_obj:
    state: list
    kind: pvc
    name: "{{ openshift_metrics_cassandra_pvc_prefix }}-{{ metrics_pvc_index }}"
    namespace: "{{openshift_metrics_old_project}}"
  register: openshift_metrics_cassandra_old_pvc

- name: Set PVC vars
  set_fact:
    pvc_name: "{{ openshift_metrics_cassandra_pvc_prefix }}-{{ metrics_pvc_index }}"
    pvc_exists: "{{ openshift_metrics_cassandra_old_pvc.results.results[0] | length > 0 }}"

- name: Set fact if we need to move to another namespace
  set_fact:
    openshift_metrics_migrate_namespace: "{{ pvc_exists and openshift_metrics_cassandra_old_pvc.results.results[0]['metadata']['name'] == pvc_name }}"

- name: Migrate cassandra PV and PVC to another namespace
  when: openshift_metrics_migrate_namespace
  block:
    - name: Get PV name attached to cassandra PVC
      set_fact:
        openshift_metrics_pv_name: "{{ openshift_metrics_cassandra_old_pvc['results']['results'][0]['spec']['volumeName'] }}"

    - name: Get PV object attached to cassandra PVC.
      oc_obj:
        state: list
        kind: pv
        name: "{{ openshift_metrics_pv_name }}"
        namespace: "{{ openshift_metrics_old_project }}"
      register: metrics_pv

    - name: Get PV persistent policy attached to cassandra PVC.
      set_fact:
        openshift_metrics_cassandra_pvc_persistent_policy: "{{ metrics_pv['results']['results'][0]['spec']['persistentVolumeReclaimPolicy'] }}"

    - name: Set PV persistent volume reclaim policy to Retain
      command: >
       {{ openshift_client_binary }} -n {{ openshift_metrics_old_project }}
        --config={{ mktemp.stdout }}/admin.kubeconfig
        patch pv {{ openshift_metrics_pv_name }} -p '{"spec": {"persistentVolumeReclaimPolicy": "Retain"}}'

    - name: Generate persistent volume claim templates for namespace {{ openshift_metrics_project }}
      template:
        src: pvc.j2
        dest: "{{ mktemp.stdout }}/templates/hawkular-cassandra-pvc{{ metrics_pvc_index }}.yaml"
      vars:
        obj_name: "{{ openshift_metrics_cassandra_pvc_prefix }}-{{ metrics_pvc_index }}"
        labels:
          metrics-infra: hawkular-cassandra
        access_modes: "{{ openshift_metrics_cassandra_pvc_access | list }}"
        size: "{{ openshift_metrics_cassandra_pvc_size }}"
        pv_selector: "{{ openshift_metrics_cassandra_pv_selector }}"
        storage_class_name: "{{ openshift_metrics_cassanda_pvc_storage_class_name | default('', true) }}"
        volume_name: "{{ openshift_metrics_pv_name }}"

    - name: Create PVC persistent volume claim {{ openshift_metrics_cassandra_pvc_prefix }}-{{ metrics_pvc_index }} for {{ openshift_metrics_project }}
      oc_obj:
        state: present
        name: "{{ openshift_metrics_cassandra_pvc_prefix }}-{{ metrics_pvc_index }}"
        namespace: "{{ openshift_metrics_project }}"
        kind: persistentvolumeclaim
        files:
          - "{{ mktemp.stdout }}/templates/hawkular-cassandra-pvc{{ metrics_pvc_index }}.yaml"
        delete_after: true

    - name: Wait for Cassandra persistent volume claim to be created on {{ openshift_metrics_project }}
      oc_obj:
        state: list
        kind: pvc
        name: "{{ openshift_metrics_cassandra_pvc_prefix }}-{{ metrics_pvc_index }}"
        namespace: "{{openshift_metrics_project}}"
      register: openshift_metrics_new_pvc
      until: openshift_metrics_new_pvc.results.results[0] | length > 0

    - set_fact:
        openshift_metrics_pvc_uuid: "{{openshift_metrics_new_pvc['results']['results'][0]['metadata']['uid']}}"

    - name: Attach PV to the new PVC
      command: >
       {{ openshift_client_binary }} -n {{ openshift_metrics_project }}
        --config={{ mktemp.stdout }}/admin.kubeconfig
        patch pv {{ openshift_metrics_pv_name }} -p '{"spec": {"claimRef": { "namespace": "{{ openshift_metrics_project }}", "name": "{{ openshift_metrics_cassandra_pvc_prefix }}-{{ metrics_pvc_index }}", "uid": "{{ openshift_metrics_pvc_uuid }}" }}}'

    - name: Wait until the PV is attached to new PVC
      oc_obj:
        state: list
        kind: pvc
        name: "{{ openshift_metrics_cassandra_pvc_prefix }}-{{ metrics_pvc_index }}"
        namespace: "{{openshift_metrics_project}}"
      register: openshift_metrics_new_pvc
      until: openshift_metrics_new_pvc.results.results[0].spec.volumeName == openshift_metrics_pv_name

    - name: Restore persistent volume reclaim policy
      command: >
       {{ openshift_client_binary }} -n {{ openshift_metrics_old_project }}
        --config={{ mktemp.stdout }}/admin.kubeconfig
        patch pv {{ openshift_metrics_pv_name }} -p '{"spec": {"persistentVolumeReclaimPolicy": "{{openshift_metrics_cassandra_pvc_persistent_policy}}"}}'