minikube start

Posted on 2021-08-20 Views:

如果需要访问 Kubernetes 上部署的应用，可以创建类型为 NodePort 或 LoadBalancer 的服务。下面的echoserver服务的类型是NodePort，可以通过 minikube service 命令得到访问该服务的地址。

Deploy applications

Create a sample deployment and expose it on port 8080:

1 2	kubectl create deployment hello-minikube --image=cilium/echoserver:latest kubectl expose deployment hello-minikube --type=NodePort --port=8080

It may take a moment, but your deployment will soon show up when you run:

$ kubectl get deployment -o wide -n default
NAME             READY   UP-TO-DATE   AVAILABLE   AGE   CONTAINERS   IMAGES                      SELECTOR
hello-minikube   1/1     1            1           34m   echoserver   cilium/echoserver:latest   app=hello-minikube
$ kubectl get services hello-minikube
NAME             TYPE       CLUSTER-IP      EXTERNAL-IP   PORT(S)          AGE
hello-minikube   NodePort   10.104.103.50   <none>        8080:30565/TCP   34m
$ kubectl get pod -o wide -n default
NAME                              READY   STATUS    RESTARTS   AGE   IP           NODE       NOMINATED NODE   READINESS GATES
hello-minikube-6ddfcc9757-tcd2m   1/1     Running   0          36m   172.17.0.5   minikube   <none>           <none>

The easiest way to access this service is to let minikube launch a web browser for you，加上–url可以显示服务ip。

$ minikube service hello-minikube
|-----------|----------------|-------------|---------------------------|
| NAMESPACE |      NAME      | TARGET PORT |            URL            |
|-----------|----------------|-------------|---------------------------|
| default   | hello-minikube |        8080 | http://192.168.49.2:30565 |
|-----------|----------------|-------------|---------------------------|
🏃  Starting tunnel for service hello-minikube.
|-----------|----------------|-------------|------------------------|
| NAMESPACE |      NAME      | TARGET PORT |          URL           |
|-----------|----------------|-------------|------------------------|
| default   | hello-minikube |             | http://127.0.0.1:64877 |
|-----------|----------------|-------------|------------------------|
🎉  Opening service default/hello-minikube in default browser...
❗  Because you are using a Docker driver on darwin, the terminal needs to be open to run it.

Alternatively, use kubectl to forward the port:

1	kubectl port-forward service/hello-minikube 7080:8080

Tada! Your application is now available at http://localhost:7080/

Delete service, deployment and pod

$ kubectl delete service hello-minikube -n default
# service "hello-minikube", "balanced" deleted
$ kubectl delete deployment hello-minikube -n default
# deployment.apps "hello-minikube", "balanced" deleted

LoadBalancer deployments

对于 LoadBalancer 类型的服务，则要稍微复杂一点。 Here is an example deployment:

1 2	kubectl create deployment hello-minikube --image=cilium/echoserver:latest kubectl expose deployment hello-minikube --type=LoadBalancer --port=8080

当服务创建之后，它的外部地址的状态会是 Pending，表示处理中:

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$ kubectl get services hello-minikube
NAME             TYPE           CLUSTER-IP      EXTERNAL-IP   PORT(S)          AGE
hello-minikube   LoadBalancer   10.104.16.253   <pending>     8080:31137/TCP   12m

这时候我是无法访问这个应用的，这个时候需要使用 minikube tunnel 命令来打开一个通道。

1	$ minikube tunnel

通道打开之后不要关闭，再查看服务，就可以看到访问的地址了。To find the routable IP, run this command and examine the EXTERNAL-IP column:

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$ kubectl get services hello-minikube
NAME       TYPE           CLUSTER-IP       EXTERNAL-IP   PORT(S)          AGE
hello-minikube   LoadBalancer   10.103.181.236   127.0.0.1     8080:30322/TCP   2m24s

Your deployment is now available at :8080

Delete service, deployment and pod

$ kubectl delete service hello-minikube -n default
# service "hello-minikube", "balanced" deleted
$ kubectl delete deployment hello-minikube -n default
# deployment.apps "hello-minikube", "balanced" deleted

When you delete deployment the pod will be terminated and deleted.

Stop Minikube