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View Certificate Details

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In this section, we will take a look how to view certificates in a kubernetes cluster.

View Certs

• To view the details of the certificate

  $ openssl x509 -in /etc/kubernetes/pki/apiserver.crt -text -noout
  

  

Follow the same procedure to identify information about of all the other certificates

Inspect Server Logs - Hardware setup

• Inspect server logs using journalctl

  $ journalctl -u etcd.service -l
  

  

Inspect Server Logs - kubeadm setup

• View logs using kubectl

  $ kubectl logs etcd-master
  

  

• View logs using docker ps and docker logs

  $ docker ps -a
  $ docker logs <container-id>
  

  

K8s Reference Docs

• https://kubernetes.io/docs/setup/best-practices/certificates/#certificate-paths