How to Verify if the ETCD Secrets Are Encrypted or Not?

Problem

• How to verify if ETCD secrets are actually encrypted after configuring ETCD secret encryption?

Environment

• Platform9 Managed Kubernetes - v5.2 and above
• Kubernetes v1.20 and above
• Docker or Containerd

Answer

• ETCD secret encryption can be verified with the help of etcdctl command line utility.
• ETCD secrets are stored at the path /registry/secrets/$namespace/$secret on the master node.
• The below command can be used to verify if the particular ETCD secret is encrypted or not.

Docker

# ETCDCTL_API=3 etcdctl get /registry/secrets/default/secret1 [...] | hexdump -C
{% endtab %}
{% tab language="bash" title="Containerd" %}
# /opt/pf9/pf9-kube/bin/etcdctl --cacert=/etc/pf9/kube.d/certs/etcdctl/etcd/ca.crt --cert=/etc/pf9/kube.d/certs/etcdctl/etcd/request.crt --key=/etc/pf9/kube.d/certs/etcdctl/etcd/request.key  get /registry/secrets/default/secret1 [...] | hexdump -C