K8s中污点实验--NoExecute

院长技术

发布于 2020-12-17 10:17:38

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发布于 2020-12-17 10:17:38

文章被收录于专栏：院长运维开发

查看Pod的信息

[root@k8s-master pv]# kubectl get pods -o wide

NAME                              READY   STATUS      RESTARTS   AGE     IP             NODE        NOMINATED NODE   READINESS GATES
affinity-hard-soft                1/1     Running     0          13h     10.244.1.26    k8s-node1   <none>           <none>
affinity-in                       1/1     Running     0          17h     10.244.1.25    k8s-node1   <none>           <none>
affinity-notin                    1/1     Running     0          17h     10.244.2.159   k8s-node3   <none>           <none>
affinity-soft-strategy-in         1/1     Running     0          13h     10.244.3.2     k8s-node2   <none>           <none>
dapi-test-pod                     0/1     Completed   0          6d19h   10.244.3.236   k8s-node2   <none>           <none>
dapi-test-pod1                    0/1     Completed   0          6d18h   10.244.3.237   k8s-node2   <none>           <none>
dapi-test-pod2                    0/1     Completed   0          6d17h   10.244.3.239   k8s-node2   <none>           <none>
emptydir-test-pod                 2/2     Running     69         4d19h   10.244.3.247   k8s-node2   <none>           <none>
frontend-454dm                    1/1     Running     0          10d     10.244.1.16    k8s-node1   <none>           <none>
frontend-8h79l                    1/1     Running     0          10d     10.244.1.20    k8s-node1   <none>           <none>
frontend-bsbbc                    1/1     Running     1          10d     10.244.2.137   k8s-node3   <none>           <none>
frontend-n8tb4                    1/1     Running     0          10d     10.244.3.225   k8s-node2   <none>           <none>
frontend-pg595                    1/1     Running     1          10d     10.244.2.131   k8s-node3   <none>           <none>
frontend-q66ql                    1/1     Running     0          10d     10.244.1.15    k8s-node1   <none>           <none>
my-nginx-7c6668789d-7hjjd         1/1     Running     0          6d17h   10.244.3.240   k8s-node2   <none>           <none>
pod-1                             1/1     Running     0          12h     10.244.2.161   k8s-node3   <none>           <none>
pod-2                             1/1     Running     0          12h     10.244.3.3     k8s-node2   <none>           <none>
pod-deployment-58b58949b9-2s8b8   1/1     Running     1          5d19h   10.244.2.138   k8s-node3   <none>           <none>
pod-deployment-58b58949b9-rrhqk   1/1     Running     0          5d19h   10.244.3.242   k8s-node2   <none>           <none>
secret-pod                        1/1     Running     0          5d22h   10.244.3.241   k8s-node2   <none>           <none>
test-hostpath-pod                 1/1     Running     0          4d18h   10.244.2.145   k8s-node3   <none>           <none>
yz-pod                            1/1     Running     0          5d15h   10.244.2.144   k8s-node3   <none>           <none>

设置k8s-node2节点为NoExecute（不允许将Pod调度到此节点，并将该节点上的Pod进行驱逐）

key为：check，value为：yuanzhang，effect为：NoExecute，key和value可以自定设置，我设置的意思就是yuanzhang检查

[root@k8s-master pv]# kubectl taint nodes k8s-node2 check=yuanzhang:NoExecute

node/k8s-node2 tainted

再次查看Pod的信息，可以Deployment控制器下的Pod重新创建到其他节点上，不受控制器管理的Pod会被删除

[root@k8s-master ~]# kubectl get pods -o wide

NAME                              READY   STATUS    RESTARTS   AGE     IP             NODE        NOMINATED NODE   READINESS GATES
affinity-hard-soft                1/1     Running   0          13h     10.244.1.26    k8s-node1   <none>           <none>
affinity-in                       1/1     Running   0          17h     10.244.1.25    k8s-node1   <none>           <none>
affinity-notin                    1/1     Running   0          17h     10.244.2.159   k8s-node3   <none>           <none>
frontend-454dm                    1/1     Running   0          10d     10.244.1.16    k8s-node1   <none>           <none>
frontend-8h79l                    1/1     Running   0          10d     10.244.1.20    k8s-node1   <none>           <none>
frontend-bsbbc                    1/1     Running   1          10d     10.244.2.137   k8s-node3   <none>           <none>
frontend-pg595                    1/1     Running   1          10d     10.244.2.131   k8s-node3   <none>           <none>
frontend-q66ql                    1/1     Running   0          10d     10.244.1.15    k8s-node1   <none>           <none>
frontend-sk684                    1/1     Running   0          2m2s    10.244.2.164   k8s-node3   <none>           <none>
my-nginx-7c6668789d-f9zqh         1/1     Running   0          2m2s    10.244.2.165   k8s-node3   <none>           <none>
pod-1                             1/1     Running   0          12h     10.244.2.161   k8s-node3   <none>           <none>
pod-deployment-58b58949b9-2s8b8   1/1     Running   1          5d20h   10.244.2.138   k8s-node3   <none>           <none>
pod-deployment-58b58949b9-xnlsv   1/1     Running   0          2m2s    10.244.2.168   k8s-node3   <none>           <none>
test-hostpath-pod                 1/1     Running   0          4d18h   10.244.2.145   k8s-node3   <none>           <none>
yz-pod                            1/1     Running   0          5d15h   10.244.2.144   k8s-node3   <none>           <none>

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