Minikube的下载和安装

Minikube是一个快速搭建单节点Kubenetes集群的工具，大家可以把它和docker Machine进行类比。

1. 安装Minikube可执行程序

MAC

brew cask install minikub

Linux

curl -Lo minikube https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64 && chmod +x minikube && sudo mv minikube /usr/local/bin/

Windows

从下载重命名成minikube.exe,然后把这个文件的所在目录添加到系统环境变量PATH里。

安装完以后，我们可以通过minikube version 查看系统版本

~ minikube versionminikube version: v0.25.0  ~

2.安装kubectl

参考

Mac

$ curl -LO https://storage.googleapis.com/kubernetes-release/release/`curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt`/bin/darwin/amd64/kubectl$ chmod +x ./kubectl$ sudo mv ./kubectl /usr/local/bin/kubectl

Linux

$ curl -LO https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectl$ chmod +x ./kubectl$ sudo mv ./kubectl /usr/local/bin/kubectl

Windows

下载exe

然后添加到系统PATH环境变量里

安装完以后可以查看版本（我们会看到它有一个报错，因为连不上k8s api server，这个很正常，因为k8s节点还创建呢）

~ kubectl versionClient Version: version.Info{Major:"1", Minor:"9", GitVersion:"v1.9.3", GitCommit:"d2835416544f298c919e2ead3be3d0864b52323b", GitTreeState:"clean", BuildDate:"2018-02-07T12:22:21Z", GoVersion:"go1.9.2", Compiler:"gc", Platform:"darwin/amd64"}The connection to the server localhost:8080 was refused - did you specify the right host or port?

3.安装Virtualbox

因为minikube创建K8S虚机是通过Virtualbox来做的（当然还有其它driver，比如KVM，vmware这里就不介绍了）

根据自己的操作系统下载安装

3. 运行minikube程序创建k8s

通过 minikube starat 去创建k8s环境。如下所示。速度根据个人网速而不同，因为需要下载东西。

~ minikube startStarting local Kubernetes v1.9.0 cluster...Starting VM...Downloading Minikube ISO 142.22 MB / 142.22 MB [============================================] 100.00% 0sGetting VM IP address...Moving files into cluster...Downloading localkube binary 162.41 MB / 162.41 MB [============================================] 100.00% 0s 0 B / 65 B [----------------------------------------------------------]   0.00% 65 B / 65 B [======================================================] 100.00% 0sSetting up certs...Connecting to cluster...Setting up kubeconfig...Starting cluster components...Kubectl is now configured to use the cluster.Loading cached images from config file.

执行结束以后呢，我们可以通过kubectl cluster-info 去连一下k8s api server.

~ kubectl cluster-infoKubernetes master is running at https://192.168.99.100:8443To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.  ~

但是，但是，此时并不代表，整个k8s集群搭建好了，因为k8s里的服务还需要起，比如API server，scheduler，kubelet等等，他们都是以容器的方式在后台启动。

那怎么判断成功了呢？

我们可以通过minikube ssh进到虚机里，然后看看是否有一些container运行起来了

~ minikube ssh                         _             _            _         _ ( )           ( )  ___ ___  (_)  ___  (_)| |/')  _   _ | |_      __/' _ ` _ `\| |/' _ `\| || , <  ( ) ( )| '_`\  /'__`\| ( ) ( ) || || ( ) || || |\`\ | (_) || |_) )(  ___/(_) (_) (_)(_)(_) (_)(_)(_) (_)`\___/'(_,__/'`\____)$ docker psCONTAINER ID        IMAGE                                      COMMAND                  CREATED             STATUS              PORTS               NAMESc1aec3464788        gcr.io/k8s-minikube/storage-provisioner    "/storage-provisioner"   8 minutes ago       Up 8 minutes                            k8s_storage-provisioner_storage-provisioner_kube-system_05db116c-236a-11e8-985b-08002709a6e3_0f36a4455bc73        fed89e8b4248                               "/sidecar --v=2 --..."   8 minutes ago       Up 8 minutes                            k8s_sidecar_kube-dns-54cccfbdf8-c7k5b_kube-system_0649fdef-236a-11e8-985b-08002709a6e3_0e49e279c5717        459944ce8cc4                               "/dnsmasq-nanny -v..."   8 minutes ago       Up 8 minutes                            k8s_dnsmasq_kube-dns-54cccfbdf8-c7k5b_kube-system_0649fdef-236a-11e8-985b-08002709a6e3_01ec9842ec31d        512cd7425a73                               "/kube-dns --domai..."   8 minutes ago       Up 8 minutes                            k8s_kubedns_kube-dns-54cccfbdf8-c7k5b_kube-system_0649fdef-236a-11e8-985b-08002709a6e3_0805346db62f0        e94d2f21bc0c                               "/dashboard --inse..."   8 minutes ago       Up 8 minutes                            k8s_kubernetes-dashboard_kubernetes-dashboard-77d8b98585-ghb5p_kube-system_0630dbdf-236a-11e8-985b-08002709a6e3_02c3edf77349e        gcr.io/google_containers/pause-amd64:3.0   "/pause"                 8 minutes ago       Up 8 minutes                            k8s_POD_kube-dns-54cccfbdf8-c7k5b_kube-system_0649fdef-236a-11e8-985b-08002709a6e3_019313f1076da        gcr.io/google_containers/pause-amd64:3.0   "/pause"                 8 minutes ago       Up 8 minutes                            k8s_POD_kubernetes-dashboard-77d8b98585-ghb5p_kube-system_0630dbdf-236a-11e8-985b-08002709a6e3_0a340e072f095        gcr.io/google_containers/pause-amd64:3.0   "/pause"                 8 minutes ago       Up 8 minutes                            k8s_POD_storage-provisioner_kube-system_05db116c-236a-11e8-985b-08002709a6e3_0dab3d03f880b        d166ffa9201a                               "/opt/kube-addons.sh"    8 minutes ago       Up 8 minutes                            k8s_kube-addon-manager_kube-addon-manager-minikube_kube-system_c4c3188325a93a2d7fb1714e1abf1259_075c8fe4570a1        gcr.io/google_containers/pause-amd64:3.0   "/pause"                 8 minutes ago       Up 8 minutes                            k8s_POD_kube-addon-manager-minikube_kube-system_c4c3188325a93a2d7fb1714e1abf1259_0

然后退出来，在本地运行minikube dashboard 会在本地弹出浏览器，就是Kubernetes的dashboard，那基本上恭喜您，安装成功了。

~ minikube dashboardOpening kubernetes dashboard in default browser...  ~