Verified on 4.5
Already on project "openshift-logging" on server "https://api.ocp-edge08-0.qe.lab.redhat.com:6443".
+ echo '-->1. check Elasticsearch Cluster Status  --< '
-->1. check Elasticsearch Cluster Status  --< 
+ oc exec -c elasticsearch elasticsearch-cdm-2cegfoxd-1-6667b86ffc-2ggcp -- es_cluster_health
{
  "cluster_name" : "elasticsearch",
  "status" : "green",
  "timed_out" : false,
  "number_of_nodes" : 3,
  "number_of_data_nodes" : 3,
  "active_primary_shards" : 2,
  "active_shards" : 4,
  "relocating_shards" : 0,
  "initializing_shards" : 0,
  "unassigned_shards" : 0,
  "delayed_unassigned_shards" : 0,
  "number_of_pending_tasks" : 0,
  "number_of_in_flight_fetch" : 0,
  "task_max_waiting_in_queue_millis" : 0,
  "active_shards_percent_as_number" : 100.0
}
+ echo '-->2. List Shards status'
-->2. List Shards status
+ es_run _cat/shards
+ es_run_util _cat/shards
+ oc exec -c elasticsearch elasticsearch-cdm-2cegfoxd-1-6667b86ffc-2ggcp -- es_util --query=_cat/shards
.kibana_1 0 r STARTED 0   230b fd01::1:f42c:a6ff:fe00:9b elasticsearch-cdm-2cegfoxd-2
.kibana_1 0 p STARTED 0   230b fd01::3:f42c:a6ff:fe00:9c elasticsearch-cdm-2cegfoxd-3
.security 0 p STARTED 5 30.5kb fd01::1:f42c:a6ff:fe00:9b elasticsearch-cdm-2cegfoxd-2
.security 0 r STARTED 5 30.5kb fd01::2:f42c:a6ff:fe00:83 elasticsearch-cdm-2cegfoxd-1

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2020:2409