自己学习通过kubernetes binary手工搭建集群时遇到的问题。
测试集群时，运行pod。
[root@k8s01 work]# kubectl run my-nginx --image=nginx:1.7.9 --replicas=2 kubectl run --generator=deployment/apps.v1 is DEPRECATED and will be removed in a future version. Use kubectl run --generator=run-pod/v1 or kubectl create instead. deployment.apps/my-nginx created检查pod状态，发现pod的状态一直在创建过程中，而不是running状态。
[root@k8s01 work]# kubectl get pod NAME READY STATUS RESTARTS AGE my-nginx-5c777454cd-pf89v 0/1 ContainerCreating 0 10s my-nginx-5c777454cd-q4bl9 0/1 ContainerCreating 0 10s查看pod的详细信息。
[root@k8s01 work]# kubectl describe pod my-nginx Name: my-nginx-5c777454cd-pf89v Namespace: default Priority: 0 Node: k8s01/192.168.115.191 Start Time: Fri, 03 Jul 2020 11:56:29 +0800 Labels: pod-template-hash=5c777454cd run=my-nginx Annotations: <none> Status: Pending IP: IPs: <none> Controlled By: ReplicaSet/my-nginx-5c777454cd Containers: my-nginx: Container ID: Image: nginx:1.7.9 Image ID: Port: <none> Host Port: <none> State: Waiting Reason: ContainerCreating Ready: False Restart Count: 0 Environment: <none> Mounts: /var/run/secrets/kubernetes.io/serviceaccount from default-token-hq4cn (ro) Conditions: Type Status Initialized True Ready False ContainersReady False PodScheduled True Volumes: default-token-hq4cn: Type: Secret (a volume populated by a Secret) SecretName: default-token-hq4cn Optional: false QoS Class: BestEffort Node-Selectors: <none> Tolerations: node.kubernetes.io/not-ready:NoExecute for 360s node.kubernetes.io/unreachable:NoExecute for 360s Events: Type Reason Age From Message ---- ------ ---- ---- ------- Normal Scheduled <unknown> default-scheduler Successfully assigned default/my-nginx-5c777454cd-pf89v to k8s01 Warning FailedCreatePodSandBox 32s kubelet, k8s01 Failed create pod sandbox: rpc error: code = Unknown desc = failed pulling image "k8s.gcr.io/pause:3.1": Error response from daemon: Get https://k8s.gcr.io/v2/: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)看到后面最后一行：
Warning FailedCreatePodSandBox 32s kubelet, k8s01 Failed create pod sandbox: rpc error: code = Unknown desc = failed pulling image "k8s.gcr.io/pause:3.1": Error response from daemon: Get https://k8s.gcr.io/v2/: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
是由于k8s.gcr.io/pause:3.1无法下载导致。
我的电脑不能上网，nginx:1.7.9是事先导入的。
通过下载k8s.gcr.io/pause:3.1镜像，然后导入集群主机。
docker load -i /opt/k8s/work/k8s.gcr.io_pause.3.1.tar再检查pod的状态，状态为running了。
[root@k8s01 work]# kubectl get pod NAME READY STATUS RESTARTS AGE my-nginx-5c777454cd-pf89v 1/1 Running 0 15m my-nginx-5c777454cd-q4bl9 1/1 Running 0 15m
