okd/roles/openshift_logging_elasticsearch/tasks/restart_cluster.yml

---
## get all pods for the cluster
- command: >
    oc get pod -l component={{ _cluster_component }},provider=openshift -n {{ openshift_logging_elasticsearch_namespace }} -o jsonpath={.items[*].metadata.name}
  register: _cluster_pods

- name: "Disable shard balancing for logging-{{ _cluster_component }} cluster"
  command: >
    oc exec {{ _cluster_pods.stdout.split(' ')[0] }} -c elasticsearch -n {{ openshift_logging_elasticsearch_namespace }} -- {{ __es_local_curl }} -XPUT 'https://localhost:9200/_cluster/settings' -d '{ "transient": { "cluster.routing.allocation.enable" : "none" } }'
  register: _disable_output
  changed_when: "'\"acknowledged\":true' in _disable_output.stdout"
  when: _cluster_pods.stdout_lines | count > 0

- command: >
    oc get dc -l component={{ _cluster_component }},provider=openshift -n {{ openshift_logging_elasticsearch_namespace }} -o jsonpath={.items[*].metadata.name}
  register: _cluster_dcs

## restart the node if it's dc is in the list of nodes to restart?
- name: "Restart ES node {{ _es_node }}"
  include_tasks: restart_es_node.yml
  with_items: "{{ _restart_logging_nodes }}"
  loop_control:
    loop_var: _es_node
  when: _es_node in _cluster_dcs.stdout

## we may need a new first pod to run against -- fetch them all again
- command: >
    oc get pod -l component={{ _cluster_component }},provider=openshift -n {{ openshift_logging_elasticsearch_namespace }} -o jsonpath={.items[*].metadata.name}
  register: _cluster_pods

- name: "Enable shard balancing for logging-{{ _cluster_component }} cluster"
  command: >
    oc exec {{ _cluster_pods.stdout.split(' ')[0] }} -c elasticsearch -n {{ openshift_logging_elasticsearch_namespace }} -- {{ __es_local_curl }} -XPUT 'https://localhost:9200/_cluster/settings' -d '{ "transient": { "cluster.routing.allocation.enable" : "all" } }'
  register: _enable_output
  changed_when: "'\"acknowledged\":true' in _enable_output.stdout"