106 lines
3.8 KiB
Markdown
106 lines
3.8 KiB
Markdown
# Minikube
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相比Docker一个二进制文件解决所有问题，Kubernetes则为不同的服务提供了不同的二进制文件，并将一些服务放到了addons中。故而，Kubernetes的部署相对要麻烦的多。借助[minikube](https://github.com/kubernetes/minikube)项目，现在可以很方便的在本机快速启动一个单节点的Kubernetes集群。
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## 安装minikube
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minikube最新release版本为v0.15.0，支持Kubernetes v1.3.0到v1.5.1的各个版本，默认启动Kubernetes v1.5.1。
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OSX
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```
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curl -Lo minikube https://storage.googleapis.com/minikube/releases/v0.15.0/minikube-darwin-amd64 && chmod +x minikube && sudo mv minikube /usr/local/bin/
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```
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Linux
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```
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curl -Lo minikube https://storage.googleapis.com/minikube/releases/v0.15.0/minikube-linux-amd64 && chmod +x minikube && sudo mv minikube /usr/local/bin/
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```
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Windows
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```
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下载https://storage.googleapis.com/minikube/releases/v0.15.0/minikube-windows-amd64.exe，并重命名为minikube.exe
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```
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minikube支持xhyve(on OSX)、VirtualBox、VMWare Fusion等多种不同的driver，这些driver也需要单独安装，比如在OSX上安装xhyve driver:
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```sh
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brew install docker-machine-driver-xhyve
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# docker-machine-driver-xhyve need root owner and uid
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sudo chown root:wheel $(brew --prefix)/opt/docker-machine-driver-xhyve/bin/docker-machine-driver-xhyve
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sudo chmod u+s $(brew --prefix)/opt/docker-machine-driver-xhyve/bin/docker-machine-driver-xhyve
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```
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另外，还需要安装一个`kubectl`客户端，用来跟kubernetes交互：
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```
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gcloud components install kubectl
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```
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## 启动Kubernetes Cluster
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启动Kubernetes Cluster就非常简单了，一个命令即可：
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```
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$ minikube start
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Starting local Kubernetes cluster...
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Kubectl is now configured to use the cluster.
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```
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当然了，国内环境下，最好加上代理：
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```
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minikube start --docker-env HTTP_PROXY=http://proxy-ip:port --docker-env HTTPS_PROXY=http://proxy-ip:port
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```
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然后就可以通过kubectl来玩Kubernetes了，比如启动一个简单的nginx服务：
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```
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$ kubectl run nginx --image=nginx --port=80
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deployment "nginx" created
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$ kubectl expose deployment nginx --port=80 --type=NodePort --name=nginx-http
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service "nginx-http" exposed
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$ kubectl get pods
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NAME READY STATUS RESTARTS AGE
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nginx-2032906785-81t56 1/1 Running 0 2m
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$ kubectl get services
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NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE
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kubernetes 10.0.0.1 <none> 443/TCP 20m
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nginx-http 10.0.0.146 <none> 80/TCP 2m
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$ minikube service nginx-http --url
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http://192.168.64.10:30569
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```
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这样就可以通过`http://192.168.64.10:30569`来直接访问nginx服务。
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minikube默认还部署了最新的dashboard，可以通过`minikube dashboard`命令在默认浏览器中打开：
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更多的玩法可以参考minikube的帮助文档：
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```
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Usage:
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minikube [command]
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Available Commands:
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dashboard Opens/displays the kubernetes dashboard URL for your local cluster
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delete Deletes a local kubernetes cluster.
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docker-env sets up docker env variables; similar to '$(docker-machine env)'
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get-k8s-versions Gets the list of available kubernetes versions available for minikube.
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ip Retrieve the IP address of the running cluster.
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logs Gets the logs of the running localkube instance, used for debugging minikube, not user code.
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service Gets the kubernetes URL for the specified service in your local cluster
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ssh Log into or run a command on a machine with SSH; similar to 'docker-machine ssh'
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start Starts a local kubernetes cluster.
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status Gets the status of a local kubernetes cluster.
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stop Stops a running local kubernetes cluster.
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version Print the version of minikube.
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```
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更多请参考https://github.com/kubernetes/minikube。
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