Docker & KubernetesCác lệnh cơ bản: xem Pod, describe events, logs container, exec vào container nếu có shell, xem rollout và endpoints Service. Thứ tự tốt là kiểm status, events, logs, config, network, resource.
Ví dụ:
bash
kubectl get pods -n app
kubectl describe pod api-123 -n app
kubectl logs api-123 -n app --previous
kubectl get endpoints api -n app--previous hữu ích khi container restart.
Nếu image tối giản không có shell, dùng ephemeral debug container khi policy cho phép.
Basic commands: list Pods, describe events, inspect container logs, exec into a container if it has a shell, check rollout and Service endpoints. A good order is status, events, logs, config, network and resources.
Example:
bash
kubectl get pods -n app
kubectl describe pod api-123 -n app
kubectl logs api-123 -n app --previous
kubectl get endpoints api -n app--previous helps when a container restarts.
If the image is minimal and has no shell, use an ephemeral debug container when policy allows.