Kubernetes / kubectl -“必须指定容器名称”，但看起来是这样吗？

Question

我正在调试kubectl的日志输出，它表明：

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

好的，这是一个解释性的错误消息，但是看看我的JSON模板，它应该只创建指定的两个容器，对吗？我遗漏了什么？(请原谅我的无知。)

我只使用了一个标准的kubectl create JSON命令来在-f脚本中创建JSON文件。JSON部署文件如下所示：

{
    "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1个以上的容器，那么您需要提供特定容器的名称。

在您的示例中，有一个pod ( postgres-operator -49202276-bjtf4)，它有两个容器(apiserver和postgres-operator )。以下命令将提供特定容器的日志

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，则必须提供容器名称(如上面的答案所述)。

要了解一个pod中的所有容器，我们可以使用：

kubectl -n get pods -o jsonpath="{..image}“