Etcd basic

https://www.krenger.ch/blog/exploring-the-openshift-etcd-with-etcdctl/

Get all keys

etcdctl get / --prefix --keys-only --write-out=simple

watch a key

etcdctl --write-out=json watch /openshift.io/project/test-etcd

get a key

etcdctl --write-out=json get /openshift.io/project/test-etcd

put a key

etcdctl --write-out=json put /openshift.io/project/test-etcd

del a key

etcdctl --write-out=json del /openshift.io/project/test-etcd