Which is the correct kubectl command to display logs in real time?
A
kubectl logs -p test-container-1
B
kubectl logs -c test-container-1
C
kubectl logs -l test-container-1
D
kubectl logs -f test-container-1
Correta
Explicação Oficial / Explicações da Comunidade
The correct command to display logs in real time is kubectl logs -f test-container-1. The -f flag (short for --follow) streams the logs continuously, similar to tail -f.
How it Works
kubectl logs retrieves logs from a pod or container. The -f flag keeps the connection open and outputs new log lines as they are written. This is essential for debugging and monitoring live applications.
Why the Correct Value is Right
The -f flag is specifically designed for real-time log streaming. It is the standard way to follow logs in Kubernetes, analogous to tail -f in Linux.
Why the Incorrect Values are Wrong
The -p flag (short for --previous) prints logs from the previous instance of a container (e.g., after a restart), not real-time streaming.
The -c flag (short for --container) specifies a container name within a pod when multiple containers exist; it does not enable real-time output.
The -l flag (short for --selector) filters pods by label; it does not stream logs in real time.
