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# 为中国用户在 Docker for Mac/Windows 中开启 Kubernetes
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中文 | [English](README_en.md)
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说明:
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* 需安装 Docker for Mac或者Docker for Windows,如果没有请下载[下载 Docker CE最新版本](https://store.docker.com/search?type=edition&offering=community)
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* 当前 master 分支已经在 Docker for Mac/Windows 18.09.1 (包含 Kubernetes 1.13.0) 版本测试通过
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* 如果你希望使用 18.09/18.06 版本(包含 Kubernetes 1.10.3) , 请使用下面命令切换 18.09 分支 ```git checkout 18.09```
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* 如果你希望使用 18.03 版本, 请使用下面命令切换 18.03 分支 ```git checkout 18.03```
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### Docker for Mac 开启 Kubernetes
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为 Docker daemon 配置 Docker Hub 的中国官方镜像加速 ```https://registry.docker-cn.com```
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![mirror](images/mirror.png)
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可选操作: 为 Kubernetes 配置 CPU 和 内存资源,建议分配 4GB 或更多内存。
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![resource](images/resource.png)
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预先从阿里云Docker镜像服务下载 Kubernetes 所需要的镜像, 可以通过修改 ```images.properties``` 文件加载你自己需要的镜像
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```bash
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./load_images.sh
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```
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开启 Kubernetes,并等待 Kubernetes 开始运行
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![k8s](images/k8s.png)
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### Docker for Windows 开启 Kubernetes
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为 Docker daemon 配置 Docker Hub 的中国官方镜像加速 ```https://registry.docker-cn.com```
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![mirror](images/mirror_win.png)
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可选操作: 为 Kubernetes 配置 CPU 和 内存资源,建议分配 4GB 或更多内存。
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![resource](images/resource_win.png)
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预先从阿里云Docker镜像服务下载 Kubernetes 所需要的镜像, 可以通过修改 ```images.properties``` 文件加载你自己需要的镜像
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使用 Bash shell
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```bash
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./load_images.sh
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```
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使用 PowerShell
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```powershell
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.\load_images.ps1
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```
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说明: 如果因为安全策略无法执行 PowerShell 脚本,请在 “以管理员身份运行” 的 PowerShell 中执行 ```Set-ExecutionPolicy RemoteSigned``` 命令。
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开启 Kubernetes,并等待 Kubernetes 开始运行
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![k8s](images/k8s_win.png)
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### 配置 Kubernetes
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可选操作: 切换Kubernetes运行上下文至 docker-for-desktop
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```shell
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kubectl config use-context docker-for-desktop
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```
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验证 Kubernetes 集群状态
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```shell
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kubectl cluster-info
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kubectl get nodes
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```
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部署 Kubernetes dashboard
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```shell
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kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v1.10.1/src/deploy/recommended/kubernetes-dashboard.yaml
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```
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或
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```shell
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kubectl create -f kubernetes-dashboard.yaml
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```
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开启 API Server 访问代理
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```shell
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kubectl proxy
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```
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通过如下 URL 访问 Kubernetes dashboard
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http://localhost:8001/api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy/#!/overview?namespace=default
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### 配置 kubeconfig (可跳过)
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对于Mac环境
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```shell
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$ TOKEN=$(kubectl -n kube-system describe secret default| awk '$1=="token:"{print $2}')
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kubectl config set-credentials docker-for-desktop --token="${TOKEN}"
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```
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对于Windows环境
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```shell
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$TOKEN=((kubectl -n kube-system describe secret default | Select-String "token:") -split " +")[1]
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kubectl config set-credentials docker-for-desktop --token="${TOKEN}"
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```
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#### 登录dashboard的时候选择 kubeconfig 文件
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![resource](images/k8s_credentials.png)
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选择 kubeconfig 文件,路径如下:
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```
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Mac: $HOME/.kube/config
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Win: %UserProfile%\.kube\config
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```
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点击登陆,进入Kubernetes Dashboard
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### 配置 Ingress
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说明:如果测试 Istio,不需要安装 Ingress
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#### 安装 Ingress
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```shell
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kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/mandatory.yaml
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kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/provider/cloud-generic.yaml
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```
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验证
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```shell
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kubectl get pods --all-namespaces -l app.kubernetes.io/name=ingress-nginx
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```
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#### 测试示例应用
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部署测试应用,详情参见[社区文章](https://matthewpalmer.net/kubernetes-app-developer/articles/kubernetes-ingress-guide-nginx-example.html)
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```shell
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kubectl create -f sample/apple.yaml
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kubectl create -f sample/banana.yaml
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kubectl create -f sample/ingress.yaml
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```
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测试示例应用
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```bash
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$ curl -kL http://localhost/apple
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apple
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$ curl -kL http://localhost/banana
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banana
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```
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删除示例应用
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```shell
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kubectl delete -f sample/apple.yaml
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kubectl delete -f sample/banana.yaml
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kubectl delete -f sample/ingress.yaml
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```
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#### 删除 Ingress
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```shell
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kubectl delete -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/provider/cloud-generic.yaml
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kubectl delete -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/mandatory.yaml
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```
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### 安装 Helm
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可以根据文档安装 helm https://github.com/helm/helm/blob/master/docs/install.md
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#### 在 Mac OS 上安装
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```shell
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# Use homebrew on Mac
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brew install kubernetes-helm
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# Install Tiller into your Kubernetes cluster
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helm init --upgrade -i registry.cn-hangzhou.aliyuncs.com/google_containers/tiller:v2.11.0 --skip-refresh
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# update charts repo (Optional)
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helm repo update
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```
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#### 在Windows上安装
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```shell
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# Use Chocolatey on Windows
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# 注:安装的时候需要保证网络能够访问googleapis这个域名
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choco install kubernetes-helm
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# Install Tiller into your Kubernetes cluster
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helm init --upgrade -i registry.cn-hangzhou.aliyuncs.com/google_containers/tiller:v2.11.0 --skip-refresh
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# update charts repo (Optional)
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helm repo update
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```
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### 配置 Istio
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说明:Istio Ingress Gateway和Ingress缺省的端口冲突,请移除Ingress并进行下面测试
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可以根据文档安装 Istio https://istio.io/docs/setup/kubernetes/
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#### 下载 Istio 1.0.4 并安装 CLI
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```bash
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curl -L https://git.io/getLatestIstio | sh -
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cd istio-1.0.4/
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export PATH=$PWD/bin:$PATH
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```
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在Windows上,您可以手工下载Istio安装包,或者把```getLatestIstio.ps1```拷贝到你希望下载 Istio 的目录,并执行 - 说明:根据社区提供的[安装脚本](https://gist.github.com/kameshsampath/796060a806da15b39aa9569c8f8e6bcf)修改而来
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```powershell
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.\getLatestIstio.ps1
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```
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#### 通过 Helm chart 安装 Istio
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```shell
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helm install install/kubernetes/helm/istio --name istio --namespace istio-system
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```
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#### 查看 istio 发布状态
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```shell
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helm status istio
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```
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#### 为 ```default``` 名空间开启自动 sidecar 注入
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```shell
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kubectl label namespace default istio-injection=enabled
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kubectl get namespace -L istio-injection
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```
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#### 安装 Book Info 示例
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```shell
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kubectl apply -f samples/bookinfo/platform/kube/bookinfo.yaml
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kubectl apply -f samples/bookinfo/networking/bookinfo-gateway.yaml
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```
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确认示例应用在运行中
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```bash
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export GATEWAY_URL=localhost:80
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curl -o /dev/null -s -w "%{http_code}\n" http://${GATEWAY_URL}/productpage
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```
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可以通过浏览器访问
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http://localhost/productpage
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说明:如果当前80端口已经被占用或保留,我们可以编辑 ```install/kubernetes/helm/istio/values.yaml``` 文件中
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Gateway 端口进行调整,比如将 80 端口替换为 8888 端口
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```
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## You can add custom gateway ports
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- port: 8888 # Changed from 80
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targetPort: 80
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name: http2
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nodePort: 31380
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```
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然后执行如下命令并生效
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```shell
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kubectl delete service istio-ingressgateway -n istio-system
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helm upgrade istio install/kubernetes/helm/istio
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```
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#### 删除实例应用
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```bash
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samples/bookinfo/platform/kube/cleanup.sh
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```
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### 卸载 Istio
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```shell
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helm del --purge istio
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kubectl delete -f install/kubernetes/helm/istio/templates/crds.yaml -n istio-system
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```
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