kubernetes - 如何基于状态为ImagePullBackOff的kubectl和滤镜查看 pods ？

Question

我想做一个kubectl get pods并过滤pod处于ImagePullBackOff状态的地方。

我已经尝试过kubectl get pods --field-selector=status.phase=waiting和kubectl get pods --field-selector=status.phase=ImagePullBackOff，但是没有返回结果。

我看了一下-o json的JSON输出:

...
            {
                "image": "zzzzzzzzzzzzzzzz",
                "imageID": "",
                "lastState": {},
                "name": "nginx",
                "ready": false,
                "restartCount": 0,
                "state": {
                    "waiting": {
                        "message": "Back-off pulling image \"zzzzzzzzzzzzzzzz\"",
                        "reason": "ImagePullBackOff"
                    }
                }
            }
...

如果我尝试将该值作为目标:

kubectl get pods --field-selector=state.waiting=ImagePullBackOff 
Error from server (BadRequest): Unable to find "/v1, Resource=pods" that match label selector "", field selector "state.waiting=ImagePullBackOff": field label not supported: state.waiting

Answer 1

使用json输出并通过jq传递:

kubectl get pod -o=json | jq '.items[]|select(any( .status.containerStatuses[]; .state.waiting.reason=="ImagePullBackOff"))|.metadata.name'

最后一块 |.metadata.name意味着它将列出pod名称，而不是整个结构。