kubernetes: pod重啓前的日誌查看

背景：
pod重啓會殺掉容器，如果要追蹤問題原因， kuberctl logs 看到的是當前的容器日誌，那怎麼查看殺掉前的容器日誌呢？
知識點：
我們看一下 logs字命令

[root@myserver ~]# kubectl  logs -h
Print the logs for a container in a pod or specified resource. If the pod has only one container, the container name is
optional.

Examples:
  # Return snapshot logs from pod nginx with only one container
  kubectl logs nginx
  
  # Return snapshot logs from pod nginx with multi containers
  kubectl logs nginx --all-containers=true
  
  # Return snapshot logs from all containers in pods defined by label app=nginx
  kubectl logs -lapp=nginx --all-containers=true
  
  # Return snapshot of previous terminated ruby container logs from pod web-1
  kubectl logs -p -c ruby web-1
  
  # Begin streaming the logs of the ruby container in pod web-1
  kubectl logs -f -c ruby web-1
  
  # Begin streaming the logs from all containers in pods defined by label app=nginx
  kubectl logs -f -lapp=nginx --all-containers=true
  
  # Display only the most recent 20 lines of output in pod nginx
  kubectl logs --tail=20 nginx
  
  # Show all logs from pod nginx written in the last hour
  kubectl logs --since=1h nginx
  
  # Return snapshot logs from first container of a job named hello
  kubectl logs job/hello
  
  # Return snapshot logs from container nginx-1 of a deployment named nginx
  kubectl logs deployment/nginx -c nginx-1

Options:
      --all-containers=false: Get all containers' logs in the pod(s).
  -c, --container='': Print the logs of this container
  -f, --follow=false: Specify if the logs should be streamed.
      --ignore-errors=false: If watching / following pod logs, allow for any errors that occur to be non-fatal
      --limit-bytes=0: Maximum bytes of logs to return. Defaults to no limit.
      --max-log-requests=5: Specify maximum number of concurrent logs to follow when using by a selector. Defaults to 5.
      --pod-running-timeout=20s: The length of time (like 5s, 2m, or 3h, higher than zero) to wait until at least one
pod is running
  -p, --previous=false: If true, print the logs for the previous instance of the container in a pod if it exists.
  -l, --selector='': Selector (label query) to filter on.
      --since=0s: Only return logs newer than a relative duration like 5s, 2m, or 3h. Defaults to all logs. Only one of
since-time / since may be used.
      --since-time='': Only return logs after a specific date (RFC3339). Defaults to all logs. Only one of since-time /
since may be used.
      --tail=-1: Lines of recent log file to display. Defaults to -1 with no selector, showing all log lines otherwise
10, if a selector is provided.
      --timestamps=false: Include timestamps on each line in the log output

Usage:
  kubectl logs [-f] [-p] (POD | TYPE/NAME) [-c CONTAINER] [options]

Use "kubectl options" for a list of global command-line options (applies to all commands).
[root@myserver ~]# 

從上面我們那可以看到，-p參數可以查看前一個容器的日誌信息
或者可以使用 --previous=true