我想通过本地主机使用kubectl port-forward命令访问我的应用程序。但是当我运行kubectl port-forward road-dashboard-dev-5cdc465475-jwwgz 8082:8080时，我收到了以下错误。
> Forwarding from 127.0.0.1:8082 -> 8080 Forwarding from [::1]:8082 ->
> 8080 Handling connection for 8082 Handling connection for 8082 E0124
> 14:15:27.173395 4376 portforward.go:400] an error occurred
> forwarding 8082 -> 8080: error forwarding port 8080 to pod
> 09a76f6936b313e438bbf5a84bd886b3b3db8f499b5081b66cddc390021556d5, uid
> : exit status 1: 2020/01/24 11:15:27 socat[9064] E connect(6, AF=2
> 127.0.0.1:8080, 16): Connection refused
我还尝试通过exec -it连接集群中的pod，但它也没有工作。我忽略的缺失点可能是什么？
node@road-dashboard-dev-5cdc465475-jwwgz:/usr/src/app$ curl -v localhost:8080
* Rebuilt URL to: localhost:8080/
* Trying ::1...
* TCP_NODELAY set
* connect to ::1 port 8080 failed: Connection refused
* Trying 127.0.0.1...
* TCP_NODELAY set
* connect to 127.0.0.1 port 8080 failed: Connection refused
* Failed to connect to localhost port 8080: Connection refused
* Closing connection 0
curl: (7) Failed to connect to localhost port 8080: Connection refused
Kubectl 全力以赴在下面。我确定容器端口值设置为 8080。
NAME READY STATUS RESTARTS AGE
pod/road-dashboard-dev-5cdc465475-jwwgz 1/1 Running 0 34m
pod/road-dashboard-dev-5cdc465475-rdk7g 1/1 Running 0 34m
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/road-dashboard-dev NodePort 10.254.61.225 <none> 80:41599/TCP 18h
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/road-dashboard-dev 2/2 2 2 18h
NAME DESIRED CURRENT READY AGE
replicaset.apps/road-dashboard-dev-5cdc465475 2 2 2 34m
Name: road-dashboard-dev-5cdc465475-jwwgz
Namespace: dev
Priority: 0
PriorityClassName: <none>
Node: c123
Containers:
road-dashboard:
Port: 8080/TCP
Host Port: 0/TCP
State: Running
Started: Fri, 24 Jan 2020 13:42:39 +0300
Ready: True
Restart Count: 0
Environment: <none>
要调试您的问题，您应该让端口转发命令在前台调整并从第二个终端卷曲，并查看您在端口转发提示符上获得的输出。
$ kubectl get all -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
pod/nginx 1/1 Running 2 112m 10.244.3.43 k8s-node-3 <none> <none>
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
service/kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 11d <none>
service/nginx NodePort 10.96.130.207 <none> 80:31316/TCP 20m run=nginx
例：
$ kubectl port-forward nginx 31000:80
Forwarding from 127.0.0.1:31000 -> 80
Forwarding from [::1]:31000 -> 80
从第二个终端窗口卷曲，将您拥有的端口向前卷曲。
$ curl localhost:31000
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
body {
width: 35em;
margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif;
}
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
您应该看到，在第一个终端上，端口转发 promt 列表显示它正在处理如下所示的连接，请注意新行Handling connection for 31000
$ kubectl port-forward nginx 31000:80
Forwarding from 127.0.0.1:31000 -> 80
Forwarding from [::1]:31000 -> 80
Handling connection for 31000
因此，如果像我有错误的端口转发，如下所示(请注意，我已将nginx容器的端口8080模式为暴露端口80(
$ kubectl port-forward nginx 31000:8080
Forwarding from 127.0.0.1:31000 -> 8080
Forwarding from [::1]:31000 -> 8080
curl 将在端口转发提示符上导致明显错误，指示在到达端口 8080 时拒绝来自容器的连接，因为它不正确。 我们得到一个空的回复。
$ curl -v localhost:31000
* Rebuilt URL to: localhost:31000/
* Trying 127.0.0.1...
* Connected to localhost (127.0.0.1) port 31000 (#0)
> GET / HTTP/1.1
> Host: localhost:31000
> User-Agent: curl/7.47.0
> Accept: */*
>
* Empty reply from server
* Connection #0 to host localhost left intact
curl: (52) Empty reply from server
$ kubectl port-forward nginx 31000:8080
Forwarding from 127.0.0.1:31000 -> 8080
Forwarding from [::1]:31000 -> 8080
Handling connection for 31000
E0124 11:35:53.390711 10791 portforward.go:400] an error occurred forwarding 31000 -> 8080: error forwarding port 8080 to pod 88e4de4aba522b0beff95c3b632eca654a5c34b0216320a29247bb8574ef0f6b, uid : exit status 1: 2020/01/24 11:35:57 socat[15334] E connect(5, AF=2 127.0.0.1:8080, 16): Connection refused