---
vssueId: 170
# layout: StepLayout
sharingTitle: CKA备考打卡 - 每日一题 - Day 12
description: CKA备考打卡 - 每日一题 - Day 12
meta:
- name: keywords
content: Kubernetes,K8S,CKA,Certified Kubernetes Administrator
---
# CKA每日一题 --- Day 12
::: tip 考题
```sh
Set configuration context $ kubectl config use-context wk8s
configure the kubelet systemed managed service, on the node labelled with name=wk8s-node-1,to launch a pod containing a single container of image nginx named myservice automatically.
Any spec file requried should be placed in the /etc/kuberneteds/mainfests directory on the node
Hints:
You can ssh to the failed node using $ ssh wk8s-node-0
You can assume elevated privileges on the node with the following command $ sudo -i
```
> 请给出操作步骤。
:::
答案及解析
## 答案
切换至wk8s上下文:
```sh
kubectl config use-context wk8s
```
查看有label`name=wk8s-node-1`的node的信息
```sh
kubectl get nodes -l name=wk8s-node-1 -o wide
```
登录指定的机器,并获得操作权限。
```sh
ssh wk8s-node-0
sudo -i
```
查看kubelet服务启动参数--config
```sh
systemctl status kubelet -l
```
在--config指定的文件中,找到staticPodPath文件目录
```sh
# cat /var/lib/kubelet/config.yaml|grep staticPodPath
staticPodPath: /etc/kubernetes/manifests
```
在静态pod目录下创建yaml,使用下面命令生成符合要求的myservice.yaml,等待kubelet自动拉起静态pod
```sh
kubectl run myservice --image=nginx --generator=run-pod/v1 --dry-run -o yaml > myservice.yaml
```
## 解析
**context相关操作官方命令指南:**
https://kubernetes.io/docs/reference/generated/kubectl/kubectl-commands#config
**Create static Pods说明:**
https://kubernetes.io/docs/tasks/configure-pod-container/static-pod/
本题主要考kubelet的配置,以及Static Pod的创建。
可以通过`systemctl status kubelet -l`查看kubelet进程的配置文件路径。

以及通过配置文件`config.yaml`找到`staticPodPath`。

有时候,情况可能会不一样,`systemctl status kubelet -l`查到的`10-kubeadm.conf`中没有`config.yaml`配置:

而是将其直接用`--pod-manifest-path`传入,所以这种情况就需要修改`10-kubeadm.conf`中的配置路径(如果路径不是期望路径)
``` sh
--pod-manifest-path=/etc/kubernetes/manifests
```
修改后需要重启kubelet:
``` sh
systemctl start kubelet
```
> CKA 考试每日一题系列,全部内容由 [我的小碗汤](https://mp.weixin.qq.com/s/5tYgb_eSzHz_TMsi0U32gw) 创作,本站仅做转载