TLS Certificate Expire Date

TLS Certificate Expire Date

1. Kubernetes Secret(kubernetes.io/tls)의 인증서 만료 날짜 확인

     $ k get secrets -n <namespace> <secret_name> -o "jsonpath={.data['tls\.crt']}" | base64 -d | openssl x509 -enddate -noout
    notAfter=May 26 23:59:59 2023 GMT
   

2. Subject CN 확인

     $ kubectl get secret -n <namespace> <secret_name> -o json | jq -r '.data."tls.crt"' | base64 -d | openssl x509 -noout -text | grep "Subject: CN = " | sed -E 's/\s+Subject: CN = ([^ ]*)/\1/g'
    www.example.com