Install Minikube（centos7）

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Install Minikube（centos7）

Install Minikube（centos7）

  1. 安装前要求
    1. 机器开启虚拟化VT-x or AMD-v。
      • linux系统检查是否开启虚拟机化功能
        egrep "(vmx|svm)" /proc/cpuinfo
    2. 安装docker （参考前面blog）
      systemctl status docker
# 如果安装docker启动遇到问题，请注意docker-ce版本 
# yum install docker-ce-17.06.1.ce
    3. 关闭虚拟内存
      swapoff -a 
# 或者注销/etc/fstab 相关行
  2. 安装 虚拟机管理器Hypervisor (虚拟机形式运行) ： virtbox
    1. 下载安装VirtualBox
      wget https://download.virtualbox.org/virtualbox/5.2.22/VirtualBox-5.2-5.2.22_126460_el7-1.x86_64.rpm
rpm -i VirtualBox-5.2-5.2.22_126460_el7-1.x86_64.rpm
# 提示缺少lib插件libSDL-1.2.so.0()(64bit)
# yum install SDL
    2. 下载安装VirtualBox证书
      wget https://www.virtualbox.org/download/oracle_vbox.asc
   rpm --import oracle_vbox.as
  3. 安装kubectl 
    curl -Lo kubectl https://storage.googleapis.com/kubernetes-release/release/v1.11.3/bin/linux/amd64/kubectl && chmod +x ./kubectl 
&& mv ./kubectl /usr/local/bin/kubectl

  4. 安装minikube

    curl -Lo minikube https://storage.googleapis.com/minikube/releases/v0.31.0/minikube-linux-amd64 && chmod +x minikube && sudo cp minikube /usr/local/bin/ && rm minikube

  5. 启动minikube前准备

    1. 下载相关镜像( 关键点 ，这些镜像都是需要下载到minikube虚拟机中，不是在物理机中，所以很多人还是选择了代理方式安装，或者是阿里云镜像，Minikube - Kubernetes本地实验环境 ). 其中，据我分析日志发现，下面是明确需要的镜像：
      k8s.gcr.io/kube-apiserver-amd64:v1.11.3 
k8s.gcr.io/kube-controller-manager-amd64:v1.11.3 
k8s.gcr.io/kube-scheduler-amd64:v1.11.3 
k8s.gcr.io/kube-proxy-amd64:v1.11.3 
k8s.gcr.io/pause:3.1 etcd-amd64:3.2.18 
k8s.gcr.io/coredns:1.1.3 kube-addon-manager:v8.6 
k8s.gcr.io/kubernetes-dashboard-amd64:v1.10.0 
gcr.io/k8s-minikube/storage-provisioner:v1.8.1
      以下的是我参考别人文章自行添加的，以备不时之需：
      k8s.gcr.io/k8s-dns-sidecar-amd64:1.14.8  
k8s.gcr.io/8s-dns-dnsmasq-nanny-amd64:1.14.8  
k8s.gcr.io/k8s-dns-kube-dns-amd64:1.14.8
quay.io/coreos/flannel:v0.9.1-amd64
我写成了自动安装docker pull images的代码，很抱歉没有写成一个完整的代码。

  ```
  vim imagespull.sh 
  #!/bin/bash
  apilist="kube-apiserver-amd64:v1.11.3 kube-controller-manager-amd64:v1.11.3 kube-scheduler-amd64:v1.11.3 kube-proxy-amd64:v1.11.3 pause:3.1 etcd-amd64:3.2.18 coredns:1.1.3 kube-addon-manager:v8.6 kubernetes-dashboard-amd64:v1.10.0 k8s-dns-sidecar-amd64:1.14.8  k8s-dns-dnsmasq-nanny-amd64:1.14.8  k8s-dns-kube-dns-amd64:1.14.8"
  mirror=k8s.gcr.io/
  newmirror=anjia0532/google-containers.
  for i in $apilist
  do
    docker pull $newmirror$i 
    docker tag $newmirror$i  $mirror$i
  done

  chmod +x imagespull.sh
  ./imagespull.sh
   docker pull  anjia0532/k8s-minikube.storage-provisioner:v1.8.1
   docker tag   anjia0532/k8s-minikube.storage-provisioner:v1.8.1  gcr.io/k8s-minikube/storage-provisioner:v1.8.1
  docker pull quay.io/coreos/flannel:v0.9.1-amd64
  ```
  1. 启动minikube，很关键一个地方。这个时候需要同时打开两个终端，使用另一个终端进行minikube ssh 操作，如果能连接进minikube虚拟机，切换到第一个终端进行Crtl +Z操作（如果稍晚暂停的话，大概率可能部署失败），然后在minikube虚拟机中（minikube ssh），执行我写的下载镜像的命令，镜像下载完毕之后。切换到第一个终端，执行fg，直至完成。
    minikube start  --kubernetes-version v1.11.3

  2. 下面是一个报错截图日志截图。显示了缺少gcr镜像文件。可以通过minikube logs查看。

    E1214 10:47:28.634110    8089 start.go:342] Error starting cluster:  kubeadm init error 
sudo /usr/bin/kubeadm init --config /var/lib/kubeadm.yaml --ignore-preflight-errors=DirAvailable--etc-kubernetes-manifests --ignore-preflight-errors=DirAvailable--data-minikube --ignore-preflight-errors=Port-10250 --ignore-preflight-errors=FileAvailable--etc-kubernetes-manifests-kube-scheduler.yaml --ignore-preflight-errors=FileAvailable--etc-kubernetes-manifests-kube-apiserver.yaml --ignore-preflight-errors=FileAvailable--etc-kubernetes-manifests-kube-controller-manager.yaml --ignore-preflight-errors=FileAvailable--etc-kubernetes-manifests-etcd.yaml --ignore-preflight-errors=Swap --ignore-preflight-errors=CRI 
 running command: : running command: 
sudo /usr/bin/kubeadm init --config /var/lib/kubeadm.yaml --ignore-preflight-errors=DirAvailable--etc-kubernetes-manifests --ignore-preflight-errors=DirAvailable--data-minikube --ignore-preflight-errors=Port-10250 --ignore-preflight-errors=FileAvailable--etc-kubernetes-manifests-kube-scheduler.yaml --ignore-preflight-errors=FileAvailable--etc-kubernetes-manifests-kube-apiserver.yaml --ignore-preflight-errors=FileAvailable--etc-kubernetes-manifests-kube-controller-manager.yaml --ignore-preflight-errors=FileAvailable--etc-kubernetes-manifests-etcd.yaml --ignore-preflight-errors=Swap --ignore-preflight-errors=CRI 

, output: [init] using Kubernetes version: v1.11.3
[preflight] running pre-flight checks
 [WARNING Swap]: running with swap on is not supported. Please disable swap
I1214 02:45:48.560337    2760 kernel_validator.go:81] Validating kernel version
I1214 02:45:48.560481    2760 kernel_validator.go:96] Validating kernel config
 [WARNING SystemVerification]: docker version is greater than the most recently validated version. Docker version: 18.06.1-ce. Max validated version: 17.03
[preflight/images] Pulling images required for setting up a Kubernetes cluster
[preflight/images] This might take a minute or two, depending on the speed of your internet connection
[preflight/images] You can also perform this action in beforehand using 'kubeadm config images pull'
[preflight] Some fatal errors occurred:
 [ERROR ImagePull]: failed to pull image [k8s.gcr.io/kube-apiserver-amd64:v1.11.3]: exit status 1
 [ERROR ImagePull]: failed to pull image [k8s.gcr.io/kube-controller-manager-amd64:v1.11.3]: exit status 1
 [ERROR ImagePull]: failed to pull image [k8s.gcr.io/kube-scheduler-amd64:v1.11.3]: exit status 1
 [ERROR ImagePull]: failed to pull image [k8s.gcr.io/kube-proxy-amd64:v1.11.3]: exit status 1
 [ERROR ImagePull]: failed to pull image [k8s.gcr.io/pause:3.1]: exit status 1
 [ERROR ImagePull]: failed to pull image [k8s.gcr.io/etcd-amd64:3.2.18]: exit status 1
 [ERROR ImagePull]: failed to pull image [k8s.gcr.io/coredns:1.1.3]: exit status 1
[preflight] If you know what you are doing, you can make a check non-fatal with `--ignore-preflight-errors=...`
: Process exited with status 2
================================================================================
An error has occurred. Would you like to opt in to sending anonymized crash
information to minikube to help prevent future errors?
To opt out of these messages, run the command:
 minikube config set WantReportErrorPrompt false

  3. 有一些常用命令的命令： 查看kubernetes 相应版本所需镜像

    kubeadm --kubernetes-version=1.11.0 config images list

    下载kubernetes 响应版本的镜像(当然需要翻墙)

    kubeadm  config images pull

    删除minikube，重新安装

    minikube delete
rm -rf ~/.minikube
minikube start

    执行执行minikube ISO (可以在minikube start --help 中的--iso-url 中查看,自己下载到本地)

    minikube start --iso-url xx

    本来是想把家里面的破电脑利用起来做rook实验，原以为三两下安装一个minikube没问题，谁曾想安装过程这么坑爹。花了很长时间，但是没关系至少有所收获，对你们也有一定的参考作用。 废话不多说了，继续加油吧。

    参考链接：

    Minikube - Kubernetes本地实验环境

    kubernets/minikube

    Running Kubernetes Locally via Minikube

    Minikube releases

    Install VirtualBox