创建pod一直处于Pending

创建pod一直处于Pending

故障现象：

[root@master01 12:37:23]:/root/k8s #kubectl get pods,svc NAME READY STATUS RESTARTS AGE pod/mypod 1/1 Running 2 12h pod/nginx-7697996758-5rtnw 1/1 Running 3 37h pod/nginx-7697996758-rvzsh 1/1 Running 3 25h pod/nginx-7697996758-zxfbp 1/1 Running 3 37h pod/tomcat-749f7974b6-cw98w 0/1 Pending 0 89s pod/tomcat-749f7974b6-plr6b 0/1 Pending 0 89s pod/tomcat-749f7974b6-qrs9l 0/1 Pending 0 89s [root@master01 12:37:25]:/root/k8s #kubectl describe pod tomcat-749f7974b6-qrs9l Name: tomcat-749f7974b6-qrs9l Namespace: default Priority: 0 PriorityClassName: Node: Labels: app=tomcat pod-template-hash=749f7974b6 Annotations: Status: Pending IP: Controlled By: ReplicaSet/tomcat-749f7974b6 Containers: tomcat: Image: tomcat:latest Port: 8080/TCP Host Port: 0/TCP Environment: Mounts: /var/run/secrets/kubernetes.io/serviceaccount from default-token-sxx8q (ro) Conditions: Type Status PodScheduled False Volumes: default-token-sxx8q: Type: Secret (a volume populated by a Secret) SecretName: default-token-sxx8q Optional: false QoS Class: BestEffort Node-Selectors: Tolerations: node.kubernetes.io/not-ready:NoExecute for 300s node.kubernetes.io/unreachable:NoExecute for 300s Events: Type Reason Age From Message ---- ------ ---- ---- ------- #故障报错 Warning FailedScheduling 118s (x2 over 118s) default-scheduler 0/2 nodes are available: 2 node(s) had taints that the pod didn't tolerate. #发现该节点是不可调度的 [root@master01 12:37:54]:/root/k8s #kubectl get no -o yaml | grep taint -A 5 taints: - effect: NoSchedule key: node.kubernetes.io/unreachable timeAdded: 2020-04-23T03:38:16Z status: addresses: -- taints: - effect: NoSchedule key: node.kubernetes.io/unreachable timeAdded: 2020-04-23T03:38:16Z status: addresses:

故障原因：pod连接master网络异常，恢复即可因为kubernetes出于安全考虑默认情况下无法在master节点上部署pod

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