269 lines
4.9 KiB
Markdown
269 lines
4.9 KiB
Markdown
> 本文作者：丁辉
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# Kubeasz部署Kubernetes集群
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[Github官方文档](https://github.com/easzlab/kubeasz)
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[Github安装文档](https://github.com/easzlab/kubeasz/blob/master/docs/setup/quickStart.md)
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| 节点名称 | IP | Kubernetes角色 |
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| :----------------------: | :----------: | :--------------: |
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| k8s-master-1,Kubeasz管理 | 192.168.1.10 | master,etcd,node |
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| k8s-master-2 | 192.168.1.20 | master,etcd,node |
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| k8s-master-3 | 192.168.1.30 | master,etcd,node |
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## 环境准备
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1. 配置免密
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```bash
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ssh-keygen -t rsa -N "" -f ~/.ssh/id_rsa -q
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```
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2. 配置免密登录
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```bash
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ssh-copy-id root@192.168.1.10
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ssh-copy-id root@192.168.1.20
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ssh-copy-id root@192.168.1.30
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```
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3. 更改主机名
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- 192.168.1.10
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```bash
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hostnamectl set-hostname k8s-master-1 && bash
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```
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- 192.168.1.20
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```bash
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hostnamectl set-hostname k8s-master-2 && bash
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```
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- 192.168.1.30
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```bash
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hostnamectl set-hostname k8s-master-3 && bash
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```
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4. 编辑 /etc/hosts 文件
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```bash
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vi /etc/hosts
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```
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添加如下内容
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```bash
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192.168.1.10 k8s-master-1
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192.168.1.20 k8s-master-2
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192.168.1.30 k8s-master-3
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```
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## 开始部署 Kubeasz
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[Github Releases](https://github.com/easzlab/kubeasz/releases)
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1. 下载 ezdown
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```bash
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wget https://github.com/easzlab/kubeasz/releases/download/3.6.2/ezdown && chmod 777 ezdown
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```
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> 下载支持 Docker 的版本
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>
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> ```bash
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> wget https://github.com/easzlab/kubeasz/releases/download/3.2.0/ezdown && chmod 777 ezdown
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> ```
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2. 下载kubeasz代码、二进制、默认容器镜像
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- 国内环境
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```bash
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./ezdown -D
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```
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> 下载 flannel 镜像
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>
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> ```bash
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> ./ezdown -X flannel
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> ```
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- 海外环境
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```bash
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./ezdown -D -m standard
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```
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> 下载 flannel 镜像
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>
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> ```bash
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> ./ezdown -D -m standard -X flannel
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> ```
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3. 运行 Kubeasz
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```bash
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./ezdown -S
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```
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> 配置快捷命令
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>
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> ```bash
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> echo "alias dk='docker exec -it kubeasz'" >> ~/.bashrc
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> source ~/.bashrc
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> ```
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>
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> 配置后执行 `dk` 即可
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4. 创建新集群
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```bash
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dk ezctl new k8s-01
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```
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5. 编辑 hosts 文件
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```bash
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vi /etc/kubeasz/clusters/k8s-01/hosts
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```
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内容如下
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```bash
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# 'etcd' cluster should have odd member(s) (1,3,5,...)
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[etcd]
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192.168.1.10
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192.168.1.20
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192.168.1.30
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# master node(s)
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[kube_master]
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192.168.1.10 k8s_nodename='k8s-master-1'
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192.168.1.20 k8s_nodename='k8s-master-2'
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192.168.1.30 k8s_nodename='k8s-master-3'
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# work node(s)
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[kube_node]
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192.168.1.10 k8s_nodename='k8s-master-1'
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192.168.1.20 k8s_nodename='k8s-master-2'
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192.168.1.30 k8s_nodename='k8s-master-3'
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# VIP
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[ex_lb]
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192.168.1.10 LB_ROLE=master EX_APISERVER_VIP=192.168.1.100 EX_APISERVER_PORT=8443
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192.168.1.20 LB_ROLE=backup EX_APISERVER_VIP=192.168.1.100 EX_APISERVER_PORT=8443
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192.168.1.30 LB_ROLE=backup EX_APISERVER_VIP=192.168.1.100 EX_APISERVER_PORT=8443
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...#此处省略
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# Cluster container-runtime supported: docker, containerd
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CONTAINER_RUNTIME="containerd"
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# Network plugins supported: calico, flannel, kube-router, cilium, kube-ovn
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CLUSTER_NETWORK="flannel"
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...#此处省略
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```
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6. 修改 config.yml 文件
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```bash
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vi /etc/kubeasz/clusters/k8s-01/config.yml
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```
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内容如下
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```yml
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############################
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# role:kube-master
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############################
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# k8s 集群 master 节点证书配置，可以添加多个ip和域名（比如增加公网ip和域名）尽量预留一些IP使用
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MASTER_CERT_HOSTS:
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- "192.168.1.10"
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- "192.168.1.20"
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- "192.168.1.30"
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- "192.168.1.100"
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```
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## 开始安装 Kubernetes
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1. 安装
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```bash
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dk ezctl setup k8s-01 all
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```
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> 或一步一步安装
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>
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> ```bash
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> # 初始化集群配置
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> dk ezctl setup k8s-01 01
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> # 安装 etcd
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> dk ezctl setup k8s-01 02
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> ...#此处省略
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> ```
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2. 加载新配置
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```bash
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source ~/.bashrc
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```
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3. 查看节点状态
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```bash
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kubectl get node
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```
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## 添加节点
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[官方文档](https://github.com/easzlab/kubeasz/blob/master/docs/op/op-node.md)
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- 添加 worker
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```bash
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dk ezctl add-node k8s-01 192.168.1.40 k8s_nodename='k8s-master-4'
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```
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> SSH 非 22 端口
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>
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> ```bash
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> dk ezctl add-node k8s-01 192.168.1.40 k8s_nodename='k8s-master-4' ansible_ssh_port=10022
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> ```
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- 添加 master
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```bash
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dk ezctl add-master k8s-01 192.168.1.40 k8s_nodename='k8s-master-4'
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```
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- 添加 etcd
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```bash
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dk ezctl add-etcd k8s-01 192.168.1.40
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```
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### 删除节点
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- 删除 worker
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```bash
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dk ezctl del-node k8s-01 192.168.1.40
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```
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- 删除 master
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```bash
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dk ezctl del-master k8s-01 192.168.1.40
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```
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- 删除 etcd
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```bash
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dk ezctl del-etcd k8s-01 192.168.1.40
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```
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