Connect to etcd on OpenShift.sh

# fetch etcd client credentials

FILES='
/etc/kubernetes/static-pod-resources/configmaps/etcd-serving-ca/ca-bundle.crt
/etc/kubernetes/static-pod-resources/secrets/etcd-client/tls.crt
/etc/kubernetes/static-pod-resources/secrets/etcd-client/tls.key
'

APISERVER_POD=$(oc get pod --namespace openshift-kube-apiserver --selector apiserver=true --output jsonpath='{.items[0].metadata.name}')

for FILE in $FILES; do
  oc cp openshift-kube-apiserver/$APISERVER_POD:$FILE $(basename $FILE)
done

# connect to etcd

etcdctl \
  --cacert ca-bundle.crt \
  --cert tls.crt \
  --key tls.key \
  --endpoints https://etcd.openshift-etcd.svc.cluster.local:2379 \
  member list -w table
  
 # alternative way to connect to etcd
 
export ETCDCTL_ENDPOINTS=https://etcd.openshift-etcd.svc.cluster.local:2379
export ETCDCTL_CACERT=ca-bundle.crt
export ETCDCTL_KEY=tls.key
export ETCDCTL_CERT=tls.crt

etcdctl member list -w table

# list all keys
etcdctl get --keys-only --prefix /

# get key value
etcdctl get /kubernetes.io/config.openshift.io/clusterversions/version

# get a json value and pretty-print it
etcdctl get /kubernetes.io/config.openshift.io/clusterversions/version | jq -R 'fromjson?'

# watch etcd updates
etcdctl watch --prefix /