Minikube-tutorial

liudongdong1 收录于 Storage

2022-05-02 约 464 字预计阅读 1 分钟 - 次阅读

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Minikube 是一种轻量化的 Kubernetes 集群，是 Kubernetes 社区为了帮助开发者和学习者能够更好学习和体验 k8s 功能而推出的，借助个人 PC 的虚拟化环境就可以实现 Kubernetes 的快速构建启动。

1. Minikube 和 Kubernetes 的区别

2. Minikube 基础操作

$ minikube start  #启动并运访问 minikube 中的 k8s dashboard行一个集群
$ minikube dashboard  #访问 minikube 中的 k8s dashboard

$kubectl create deployment hello-node --image=k8s.gcr.io/echoserver:1.4 #创建一个deployment

$ kubectl expose deployment hello-node --type=LoadBalancer --port=8080  #创建一个service
$ minikube service hello-node

$ minikube addons list   #List the currently supported addons
$ minikube addons enable metrics-server #Enable an addon, for example, metrics-server
$ minikube addons disable metrics-server

$ kubectl delete service hello-node
$ kubectl delete deployment hello-node
$ minikube stop          #停止一个集群
$ minikube delete      #删除一个集群
$ minikube delete --all   #删除本地所有集群和配置

3. kubernetes 基本操作

.1. create a cluster

$ minikube start
$ minikube version
$ kubectl version
$ kubectl cluster-info
$ kubectl get nodes

.2. Deploying an app

$ kubectl create deployment hello-minikube1 --image=registry.cn-hangzhou.aliyuncs.com/google_containers/echoserver:1.10

$ kubectl get deployments

$ kubectl expose deployment hello-minikube1 --type=LoadBalancer --port=8080 #创建 LB 服务，将服务暴露出来
$ kubectl get svc #查看外部访问 IP

$ kubectl proxy  # use proxy to direct access to the api
curl http://localhost:8001/version

export POD_NAME=$(kubectl get pods -o go-template --template '{{range.items}} {{.metadata.name}}{{"\n"}}{{end}}')

$ curl http://localhost:8001/api/v1/namespaces/default/pods/$POD_NAME/proxy/

$ kubectl logs $POD_NAME

$ kubectl exec $POD_NAMES -- env  #查看环境变量
$ kubectl exec -ti $POD_NAME -- bash

.3. exploring the app

$ kubectl describe pods  # 查看pods 详细信息

$ kubectl logs $POD_NAME

$ kubectl exec $POD_NAMES -- env  #查看环境变量
$ kubectl exec -ti $POD_NAME -- bash

.4. Expose your app

$ kubectl get services

$ kubectl expose deployment/kubernetes-bootcamp --type="NodePort" --port 8080

$ export NODE_PORT=$(kubectl get services/kubernetes-bootcamp -o go-template='{{(index .spec.ports O).nodePort}}')  #32457

$ kubectl delete service -l app=kubernetes-bootcamp

.5. Scale the app

$ kubectl scale deployments/kubernetes-bootcamp --replicas=4

.6. update the app

$ kubectl set image deployments/kubernetes-bootcamp kubernetes-bootcamp=jocatalin/kubernetes-bootcamp:v2

$ kubectl rollout undo deployments/kubernetes-bootcamp  # roll back to the last working version