ETCD

ETCD is key value pair storage system used for kubernetes cluster data storage. ETCDCTL version 2 supports the following commands to interact with ETCD:

• etcdctl backup
• etcdctl cluster-health
• etcdctl mk
• etcdctl mkdir
• etcdctl set

Version 3 supports command as below -

• etcdctl snapshot save
• etcdctl endpoint health
• etcdctl get
• etcdctl put

Final command to configure - kubectl exec etcd-master -n kube-system -- sh -c "ETCDCTL_API=3 etcdctl get / --prefix --keys-only --limit=10 --cacert /etc/kubernetes/pki/etcd/ca.crt --cert /etc/kubernetes/pki/etcd/server.crt --key /etc/kubernetes/pki/etcd/server.key"