最近刚刚入手研究kubernetes，运行容器的时候，发现一直处于ContainerCreating状态，悲了个催，刚入手就遇到了点麻烦，下面来讲讲如何查找问题及解决的

运行容器命令：

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[root@master-149 ~]# kubectl run my-alpine --image=alpine --replicas=2 ping www.baidu.com
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查看pods状态

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[root@master-149 ~]# kubectl get pods
NAME READY STATUS RESTARTS AGE
my-alpine-2150523991-knzcx 0/1 ContainerCreating 0 6m
my-alpine-2150523991-lmvv5 0/1 ContainerCreating 0 6m
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一直处于ContainerCreating状态，开始查找原因

执行如下命令:

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[root@master-149 ~]# kubectl describe pod my-alpine
Name: my-alpine-2150523991-knzcx
Namespace: default
Node: node-150/192.168.10.150
Start Time: Sat, 19 Nov 2016 18:20:52 +0800
Labels: pod-template-hash=2150523991,run=my-alpine
Status: Pending
IP:
Controllers: ReplicaSet/my-alpine-2150523991
Containers:
my-alpine:
Container ID:
Image: alpine
Image ID:
Port:
Args:
ping
www.baidu.com
QoS Tier:
cpu: BestEffort
memory: BestEffort
State: Waiting
Reason: ContainerCreating
Ready: False
Restart Count: 0
Environment Variables:
Conditions:
Type Status
Ready False
No volumes.
Events:
FirstSeen LastSeen Count From SubobjectPath Type Reason Message

7m 7m 1 {default-scheduler } Normal Scheduled Successfully assigned my-alpine-2150523991-knzcx to node-150
6m 6m 1 {kubelet node-150} Warning FailedSync Error syncing pod, skipping: failed to "StartContainer" for "POD" with ErrImagePull: "image pull failed for gcr.io/google_containers/pause:2.0, this may be because there are no credentials on this request. details: (unable to ping registry endpoint https://gcr.io/v0/\nv2 ping attempt failed with error: Get https://gcr.io/v2/: dial tcp 64.233.189.82:443: getsockopt: connection refused\n v1 ping attempt failed with error: Get https://gcr.io/v1/_ping: dial tcp 64.233.189.82:443: getsockopt: connection refused)"
4m 47s 3 {kubelet node-150} Warning FailedSync Error syncing pod, skipping: failed to "StartContainer" for "POD" with ErrImagePull: "image pull failed for gcr.io/google_containers/pause:2.0, this may be because there are no credentials on this request. details: (unable to ping registry endpoint https://gcr.io/v0/\nv2 ping attempt failed with error: Get https://gcr.io/v2/: dial tcp 74.125.204.82:443: getsockopt: connection refused\n v1 ping attempt failed with error: Get https://gcr.io/v1/_ping: dial tcp 74.125.204.82:443: getsockopt: connection refused)"
4m 8s 6 {kubelet node-150} Warning FailedSync Error syncing pod, skipping: failed to "StartContainer" for "POD" with ImagePullBackOff: "Back-off pulling image \"gcr.io/google_containers/pause:2.0\""
Name: my-alpine-2150523991-lmvv5
Namespace: default
Node: node-150/192.168.10.150
Start Time: Sat, 19 Nov 2016 18:20:52 +0800
Labels: pod-template-hash=2150523991,run=my-alpine
Status: Pending
IP:
Controllers: ReplicaSet/my-alpine-2150523991
Containers:
my-alpine:
Container ID:
Image: alpine
Image ID:
Port:
Args:
ping
www.baidu.com
QoS Tier:
cpu: BestEffort
memory: BestEffort
State: Waiting
Reason: ContainerCreating
Ready: False
Restart Count: 0
Environment Variables:
Conditions:
Type Status
Ready False
No volumes.
Events:
FirstSeen LastSeen Count From SubobjectPath Type Reason Message

7m 7m 1 {default-scheduler } Normal Scheduled Successfully assigned my-alpine-2150523991-lmvv5 to node-150
5m 1m 3 {kubelet node-150} Warning FailedSync Error syncing pod, skipping: failed to "StartContainer" for "POD" with ErrImagePull: "image pull failed for gcr.io/google_containers/pause:2.0, this may be because there are no credentials on this request. details: (unable to ping registry endpoint https://gcr.io/v0/\nv2 ping attempt failed with error: Get https://gcr.io/v2/: dial tcp 74.125.204.82:443: getsockopt: connection refused\n v1 ping attempt failed with error: Get https://gcr.io/v1/_ping: dial tcp 74.125.204.82:443: getsockopt: connection refused)"
3m 1m 4 {kubelet node-150} Warning FailedSync Error syncing pod, skipping: failed to "StartContainer" for "POD" with ImagePullBackOff: "Back-off pulling image \"gcr.io/google_containers/pause:2.0\""

[/sourcecode]

其中：

[sourcecode language="plain"]
Error syncing pod, skipping: failed to "StartContainer" for "POD" with ErrImagePull: "image pull failed for gcr.io/google_containers/pause:2.0, this may be because there are no credentials on this request. details: (unable to ping registry endpoint https://gcr.io/v0/\nv2 ping attempt failed with error: Get https://gcr.io/v2/: dial tcp 74.125.204.82:443: getsockopt: connection refused\n v1 ping attempt failed with error: Get https://gcr.io/v1/_ping: dial tcp 74.125.204.82:443: getsockopt: connection refused)
[/sourcecode]

不难看出，无法访问到gcr.io

有如下解决办法：

翻墙

修改hosts文件（这里我用的是"61.91.161.217 gcr.io"，但是可能会失效）

从其他源下载容器"pause:2.0"，然后打tag为"gcr.io/google_containers/pause:2.0"