自己學習通過kubernetes binary手工搭建集羣時遇到的問題。
測試集羣時，運行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
檢查pod狀態，發現pod的狀態一直在創建過程中，而不是running狀態。
[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的詳細信息。
[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)
看到後面最後一行：
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)
是由於k8s.gcr.io/pause:3.1無法下載導致。
我的電腦不能上網，nginx:1.7.9是事先導入的。
通過下載k8s.gcr.io/pause:3.1鏡像，然後導入集羣主機。
docker load -i /opt/k8s/work/k8s.gcr.io_pause.3.1.tar
再檢查pod的狀態，狀態爲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