Kubernetes / kubectl - "A container name must be specified" 但似乎是这样？

Question

我正在调试 kubectl 的日志输出，其中指出：

Error from server (BadRequest): a container name must be specified for pod postgres-operator-49202276-bjtf4, choose one of: [apiserver postgres-operator]

好的，这是一条解释性错误消息，但查看我的 JSON 模板，它应该只创建指定的两个容器，对吗？我错过了什么？（请原谅我的无知。）

我仅使用标准的 kubectl create -f 命令在 shell 脚本中创建 JSON 文件。 JSON部署文件如下：

{
    "apiVersion": "extensions/v1beta1",
    "kind": "Deployment",
    "metadata": {
        "name": "postgres-operator"
    },
    "spec": {
        "replicas": 1,
        "template": {
            "metadata": {
                "labels": {
                    "name": "postgres-operator"
                }
            },
            "spec": {
                "containers": [{
                    "name": "apiserver",
                    "image": "$CCP_IMAGE_PREFIX/apiserver:$CO_IMAGE_TAG",
                    "imagePullPolicy": "IfNotPresent",
                    "env": [{
                        "name": "DEBUG",
                        "value": "true"
                    }],
                    "volumeMounts": [{
                        "mountPath": "/config",
                        "name": "apiserver-conf",
                        "readOnly": true
                    }, {
                        "mountPath": "/operator-conf",
                        "name": "operator-conf",
                        "readOnly": true
                    }]
                }, {
                    "name": "postgres-operator",
                    "image": "$CCP_IMAGE_PREFIX/postgres-operator:$CO_IMAGE_TAG",
                    "imagePullPolicy": "IfNotPresent",
                    "env": [{
                        "name": "DEBUG",
                        "value": "true"
                    }, {
                        "name": "NAMESPACE",
                        "valueFrom": {
                            "fieldRef": {
                                "fieldPath": "metadata.namespace"
                            }
                        }
                    }, {
                        "name": "MY_POD_NAME",
                        "valueFrom": {
                            "fieldRef": {
                                "fieldPath": "metadata.name"
                            }
                        }
                    }],
                    "volumeMounts": [{
                        "mountPath": "/operator-conf",
                        "name": "operator-conf",
                        "readOnly": true
                    }]
                }],
                "volumes": [{
                    "name": "operator-conf",
                    "configMap": {
                        "name": "operator-conf"
                    }
                }, {
                    "name": "apiserver-conf",
                    "configMap": {
                        "name": "apiserver-conf"
                    }
                }]
            }
        }
    }
}

Answer 1

如果一个 pod 有超过 1 个容器，那么您需要提供特定容器的名称。

在您的情况下，有一个 pod (postgres-operator-49202276-bjtf4)，它有 2 个容器（apiserver 和 postgres-operator）。以下命令将为特定容器提供日志

kubectl logs deployment/postgres-operator -c apiserver


kubectl logs deployment/postgres-operator -c postgres-operator

Answer 2

如果 pod 有多个容器（如上述答案所述），则必须给出容器名称。

要知道 pod 中的所有容器，我们可以使用：

kubectl -n <NAMESPACE> get pods <POD_NAME> -o jsonpath="{..image}"

Kubernetes / kubectl - "A container name must be specified" 但似乎是这样？

Kubernetes / kubectl - "A container name must be specified" but seems like it is?

json

kubernetes

kubectl