Common Kubernetes commands

kubectl is a helpful command-line tool for investigating the state of a Kubernetes cluster. Get familiar with their reference documentation. Here are some commands you may use frequently.

The first thing you should do is get the status of all containers in a cluster and ensure the whole cluster is running. The status column will all be ‘Running’ when the entire cluster is up and operational. Example:

% kubectl get pods -n dcone 
NAME                                     READY   STATUS    RESTARTS   AGE
account-6d4f9fb589-lbp66                 1/1     Running   1          2d2h
certificate-authority-578cfdc6b5-pf4nm   1/1     Running   1          2d2h
enterprise-85b8f96f4d-9hkfk              1/1     Running   2          2d2h
extauth-74f85f9d5d-l87kp                 1/1     Running   1          2d2h
imauth-74c846b75-w9zfk                   1/1     Running   1          2d2h
iot-5bccb5d6f6-kpbsm                     1/1     Running   1          2d2h
keycloak-0                               1/1     Running   1          2d2h
mailhog-7b6c97f894-dqzlm                 1/1     Running   0          2d2h
mariadb-mariadb-0                        1/1     Running   0          2d2h  

To view the real-time system logs for the DigiCert​​®​​ Trust Lifecycle Manager application:

kubectl logs -f service/enterprise -n dcone

To view the real-time system logs for DigiCert​​®​​ IoT Trust Manager:

kubectl logs -f service/iot -n dcone

To view the real-time system logs for Account Manager:

kubectl logs -f service/account -n dcone

To view the real-time system logs for CA Manager:

kubectl logs -f service/certificate-authority -n dcone