Windows 10 上的 MiniKube 端口转发不工作

Question

我正在我的笔记本电脑 (Windows 10 OS) 上设置 kubernetes 以处理容器及其编排。 我使用以下命令创建了 Minikube VM，它成功了。

minikube start --vm-driver hyperv --hyperv-virtual-switch "Primary Virtual Switch"

我能够启动 Kubernetes，也能够启动 Minikube 仪表板

我启动了 Kubernetes 集群并将 nginx 应用程序部署到集群中。以下是命令。

kubectl run hello-nginx --image=nginx --port=8020
kubectl expose deployment hello-nginx --type=NodePort --port=8020 --target-port=8020

我可以使用以下命令查看 PODs 和服务。

kubectl get pods
kubectl get services

到这里都可以正常工作。我能够在 Minikube 仪表板中查看部署、PODs 和服务信息。

当我运行以下命令在浏览器中启动应用程序时，浏览器会抛出一条消息"Resource Not Found"，但我能够在 MiniKube 仪表板中查看 POD 和服务信息。

minikube service hello-nginx

URL: http://192.168.43.20:32087/

在浏览器中出现异常

This website could not be found.
Error Code: INET_E_RESOURCE_NOT_FOUND

下面给出了部署 YAML 文件，

{
  "kind": "Deployment",
  "apiVersion": "extensions/v1beta1",
  "metadata": {
    "name": "hello-nginx",
    "namespace": "default",
    "selfLink": "/apis/extensions/v1beta1/namespaces/default/deployments/hello-nginx",
    "uid": "5629038e-93e5-11e9-ad2e-00155d162e0e",
    "resourceVersion": "49313",
    "generation": 1,
    "creationTimestamp": "2019-06-21T05:28:01Z",
    "labels": {
      "run": "hello-nginx"
    },
    "annotations": {
      "deployment.kubernetes.io/revision": "1"
    }
  },
  "spec": {
    "replicas": 1,
    "selector": {
      "matchLabels": {
        "run": "hello-nginx"
      }
    },
    "template": {
      "metadata": {
        "creationTimestamp": null,
        "labels": {
          "run": "hello-nginx"
        }
      },
      "spec": {
        "containers": [
          {
            "name": "hello-nginx",
            "image": "nginx",
            "ports": [
              {
                "containerPort": 8020,
                "protocol": "TCP"
              }
            ],
            "resources": {},
            "terminationMessagePath": "/dev/termination-log",
            "terminationMessagePolicy": "File",
            "imagePullPolicy": "Always"
          }
        ],
        "restartPolicy": "Always",
        "terminationGracePeriodSeconds": 30,
        "dnsPolicy": "ClusterFirst",
        "securityContext": {},
        "schedulerName": "default-scheduler"
      }
    },
    "strategy": {
      "type": "RollingUpdate",
      "rollingUpdate": {
        "maxUnavailable": 1,
        "maxSurge": 1
      }
    },
    "revisionHistoryLimit": 2147483647,
    "progressDeadlineSeconds": 2147483647
  },
  "status": {
    "observedGeneration": 1,
    "replicas": 1,
    "updatedReplicas": 1,
    "readyReplicas": 1,
    "availableReplicas": 1,
    "conditions": [
      {
        "type": "Available",
        "status": "True",
        "lastUpdateTime": "2019-06-21T05:28:01Z",
        "lastTransitionTime": "2019-06-21T05:28:01Z",
        "reason": "MinimumReplicasAvailable",
        "message": "Deployment has minimum availability."
      }
    ]
  }
}

下面给出了副本集 YAML 文件信息，

{
  "kind": "ReplicaSet",
  "apiVersion": "extensions/v1beta1",
  "metadata": {
    "name": "hello-nginx-76696c698f",
    "namespace": "default",
    "selfLink": "/apis/extensions/v1beta1/namespaces/default/replicasets/hello-nginx-76696c698f",
    "uid": "562be1e8-93e5-11e9-ad2e-00155d162e0e",
    "resourceVersion": "49310",
    "generation": 3,
    "creationTimestamp": "2019-06-21T05:28:01Z",
    "labels": {
      "pod-template-hash": "76696c698f",
      "run": "hello-nginx"
    },
    "annotations": {
      "deployment.kubernetes.io/desired-replicas": "1",
      "deployment.kubernetes.io/max-replicas": "2",
      "deployment.kubernetes.io/revision": "1"
    },
    "ownerReferences": [
      {
        "apiVersion": "apps/v1",
        "kind": "Deployment",
        "name": "hello-nginx",
        "uid": "5629038e-93e5-11e9-ad2e-00155d162e0e",
        "controller": true,
        "blockOwnerDeletion": true
      }
    ]
  },
  "spec": {
    "replicas": 1,
    "selector": {
      "matchLabels": {
        "pod-template-hash": "76696c698f",
        "run": "hello-nginx"
      }
    },
    "template": {
      "metadata": {
        "creationTimestamp": null,
        "labels": {
          "pod-template-hash": "76696c698f",
          "run": "hello-nginx"
        }
      },
      "spec": {
        "containers": [
          {
            "name": "hello-nginx",
            "image": "nginx",
            "ports": [
              {
                "containerPort": 8020,
                "protocol": "TCP"
              }
            ],
            "resources": {},
            "terminationMessagePath": "/dev/termination-log",
            "terminationMessagePolicy": "File",
            "imagePullPolicy": "Always"
          }
        ],
        "restartPolicy": "Always",
        "terminationGracePeriodSeconds": 30,
        "dnsPolicy": "ClusterFirst",
        "securityContext": {},
        "schedulerName": "default-scheduler"
      }
    }
  },
  "status": {
    "replicas": 1,
    "fullyLabeledReplicas": 1,
    "readyReplicas": 1,
    "availableReplicas": 1,
    "observedGeneration": 3
  }
}

现在我正在尝试将请求路由到 POD 的端口转发选项，但它不起作用。

kubectl port-forward deployment/hello-nginx 8020:8020

当我尝试访问 URL“http://127.0.0.1:8020”

时出现以下异常

Handling connection for 8020
E0622 01:07:06.306320   18888 portforward.go:331] an error occurred forwarding 8020 -> 8020: error forwarding port 8020 to pod c54d6faaa545992dce02f58490a26154134843eb7426a51e78df2cda172b514c, uid : exit status 1: 2019/06/21 08:01:18 socat[4535] E connect(5, AF=2 127.0.0.1:8020, 16): Connection refused

我已经阅读了很多这方面的文章，但找不到这个问题的根本原因。我在这里遗漏了什么重要的东西吗？

感谢您的提前帮助。

Answer 1

您的问题实际上与Minikube或端口转发无关。您公开端口 8020，但应用程序 hello-nginx 使用 80。所以你应该到处使用 80 而不是 8020。例如：

kubectl run hello-nginx --image=nginx --port=80

也就是说，使用 Minikube 并不是 Windows 的最佳选择。更好的是使用 Docker Desktop，然后你运行在 Kubernetes 上的所有东西都可以在你的 localhost.

上使用

Windows 10 上的 MiniKube 端口转发不工作

Port Forward Not Working in MiniKube on Windows 10

kubernetes

minikube