CKA 模拟真题 Killer.sh | Question 2 | Schedule Pod on Controlplane Node

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Task weight: 3%

Use context: kubectl config use-context k8s-c1-H

Create a single Pod of image httpd:2.4.41-alpine in Namespace default . The Pod should be named pod1 and the container should be named pod1-container . This Pod should only be scheduled on a controlplane node, do not add new labels any nodes.

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译文

在namespace default 中创建一个 httpd:2.4.41-alpine 的Pod。这个Pod应该被命名为 pod1 ，容器应该被命名为 pod1-container 。这个Pod应该只被安排在控制平面节点上，不要在任何节点上添加新的标签。

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解答

切换集群环境

kubectl config use-context k8s-c1-H

首先，我们找到控制平面节点和它们的污点

k get node #找到controlplane节点
k describe node cluster1-controlplane1 | grep -i taints -A1 #查看节点污点
k get node cluster1-controlplane1 --show-labels #查看节点标签

创建一个pod模板

k run pod1 --image=httpd:2.4.41-alpine $do > 2.yaml
vim 2.yaml

2.yaml

# 2.yaml
apiVersion: v1
kind: Pod
metadata:
  creationTimestamp: null
  labels:
    run: pod1
  name: pod1
spec:
  containers:
  - image: httpd:2.4.41-alpine
    name: pod1-container                       # change
    resources: {}
  dnsPolicy: ClusterFirst
  restartPolicy: Always
  tolerations:                                 # add
  - effect: NoSchedule                         # add
    key: node-role.kubernetes.io/control-plane # add
  nodeSelector:                                # add
    node-role.kubernetes.io/control-plane: ""  # add
status: {}

创建pod

k -f 2.yaml create