Chapter 4. RHOSO memcached clusters

You can use the following command to monitor the memcached startup, which displays the startup state in the MESSAGE column and the service availability in the READY column:

$ oc get memcached
NAME        READY   MESSAGE
memcached   True	Setup complete

In this example, because the READY column is True, the memcached service is ready, which means that its associated pods are started and ready to accept traffic.

You can use the following command to determine the status of the memcached pods:

$ oc get pods -l memcached/name=memcached
NAME      	READY   STATUS	RESTARTS   AGE
memcached-0   1/1 	Running   0      	2d4h
memcached-1   1/1 	Running   0      	15m
memcached-2   1/1 	Running   0      	15m

You can use the following command to describe the type of the memcached service and which ports are open:

$ oc get service memcached
NAME        TYPE        CLUSTER-IP   EXTERNAL-IP     PORT(S)           	  AGE
memcached   ClusterIP   None     	    <none>          11211/TCP,11212/TCP   2d4h

The CLUSTER-IP column entry is None because the memcached pods are accessed directly by name through the Red Hat OpenStack Services on OpenShift (RHOSO) components. The memcached service is used only to maintain a list of DNS records for each memcached pod.