Mastering Kubernetes - Second Edition

Verifying the etcd cluster

Once the etcd cluster is up and running, you can access the etcdctl tool to check on the cluster status and health. Kubernetes lets you execute commands directly inside pods or container through the exec command (similar to Docker exec).

Here is how to check whether the cluster is healthy:

> k exec etcd-cluster-0000 etcdctl cluster-health
member 898a228a043c6ef0 is healthy: got healthy result from http://etcd-cluster-0001.etcd-cluster.default.svc:2379
member 89e2f85069640541 is healthy: got healthy result from http://etcd-cluster-0002.etcd-cluster.default.svc:2379
member 963265fbd20597c6 is healthy: got healthy result from http://etcd-cluster-0000.etcd-cluster.default.svc:2379
cluster is healthy  

Here is to how ...