题目主干

Task
通过 pod label name=cpu-loader，找到运行时占用大量 CPU 的 pod，
并将占用 CPU 最高的 pod 名称写入文件 /opt/KUTR000401/KUTR00401.txt（已存在）。

参考说明

通过帮助命令查看相关参数

  1. student@master01:~$ kubectl top pod -h 
  2. Display resource (CPU/memory) usage of pods.
  4.  The 'top pod' command allows you to see the resource consumption of pods.
  6.  Due to the metrics pipeline delay, they may be unavailable for a few minutes since pod creation.
  8. Aliases:
  9. pod, pods, po
  11. Examples:
  12.   # Show metrics for all pods in the default namespace
  13.   kubectl top pod
  15.   # Show metrics for all pods in the given namespace
  16.   kubectl top pod --namespace=NAMESPACE
  18.   # Show metrics for a given pod and its containers
  19.   kubectl top pod POD_NAME --containers
  21.   # Show metrics for the pods defined by label name=myLabel
  22.   kubectl top pod -l name=myLabel
  24. Options:
  25.   -A, --all-namespaces=false: If present, list the requested object(s) across all namespaces. Namespace in current
  26. context is ignored even if specified with --namespace.
  27.       --containers=false: If present, print usage of containers within a pod.
  28.       --field-selector='': Selector (field query) to filter on, supports '=', '==', and '!='.(e.g. --field-selector
  29. key1=value1,key2=value2). The server only supports a limited number of field queries per type.
  30.       --no-headers=false: If present, print output without headers.
  31.   -l, --selector='': Selector (label query) to filter on, supports '=', '==', and '!='.(e.g. -l key1=value1,key2=value2)
  32.       --sort-by='': If non-empty, sort pods list using specified field. The field can be either 'cpu' or 'memory'.
  33.       --use-protocol-buffers=true: Enables using protocol-buffers to access Metrics API.
  35. Usage:
  36.   kubectl top pod [NAME | -l label] [options]
  38. Use "kubectl options" for a list of global command-line options (applies to all commands).
  39. student@master01:~$

题目解答

  1. student@master01:~$ kubectl top pod -l name=cpu-loader --sort-by=cpu -A
  2. NAMESPACE   NAME         CPU(cores)   MEMORY(bytes)   
  3. cpu-top     redis-test   2m           3Mi             
  4. cpu-top     nginx-host   0m           4Mi             
  5. cpu-top     test0        0m           8Mi             
  6. student@master01:~$ sudo  mkdir -p /opt/KUTR000401/
  7. student@master01:~$ sudo touch /opt/KUTR000401/KUTR00401.txt
  8. student@master01:~$ sudo echo "redis-test" > /opt/KUTR000401/KUTR00401.txt
  9. student@master01:~$ cat /opt/KUTR000401/KUTR00401.txt