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本文作者：丁辉

Kubeasz部署Kubernetes集群

Github官方文档

Github安装文档

节点名称	IP	Kubernetes角色
k8s-master-1,Kubeasz管理	192.168.1.10	master,etcd,node
k8s-master-2	192.168.1.20	master,etcd,node
k8s-master-3	192.168.1.30	master,etcd,node

环境准备

配置免密

ssh-keygen -t rsa -N "" -f ~/.ssh/id_rsa -q

配置免密登录

ssh-copy-id root@192.168.1.10
ssh-copy-id root@192.168.1.20
ssh-copy-id root@192.168.1.30

更改主机名

192.168.1.10

hostnamectl set-hostname k8s-master-1 && bash

192.168.1.20

hostnamectl set-hostname k8s-master-2 && bash

192.168.1.30

hostnamectl set-hostname k8s-master-3 && bash

编辑 /etc/hosts 文件

vi /etc/hosts

添加如下内容

192.168.1.10 k8s-master-1
192.168.1.20 k8s-master-2
192.168.1.30 k8s-master-3

开始部署 Kubeasz

Github Releases

下载 ezdown

wget https://github.com/easzlab/kubeasz/releases/download/3.6.2/ezdown && chmod 777 ezdown

下载支持 Docker 的版本

wget https://github.com/easzlab/kubeasz/releases/download/3.2.0/ezdown && chmod 777 ezdown

下载kubeasz代码、二进制、默认容器镜像
- 国内环境
```
./ezdown -D
```
  下载 flannel 镜像
```
./ezdown -X flannel
```
- 海外环境
```
./ezdown -D -m standard
```
  下载 flannel 镜像
```
./ezdown -D -m standard -X flannel
```

运行 Kubeasz

./ezdown -S

配置快捷命令
echo "alias dk='docker exec -it kubeasz'" >> ~/.bashrc
source ~/.bashrc
配置后执行 dk 即可

创建新集群
```
dk ezctl new k8s-01
```

编辑 hosts 文件

vi /etc/kubeasz/clusters/k8s-01/hosts

内容如下

# 'etcd' cluster should have odd member(s) (1,3,5,...)
[etcd]
192.168.1.10
192.168.1.20
192.168.1.30

# master node(s)
[kube_master]
192.168.1.10 k8s_nodename='k8s-master-1'
192.168.1.20 k8s_nodename='k8s-master-2'
192.168.1.30 k8s_nodename='k8s-master-3'

# work node(s)
[kube_node]
192.168.1.10 k8s_nodename='k8s-master-1'
192.168.1.20 k8s_nodename='k8s-master-2'
192.168.1.30 k8s_nodename='k8s-master-3'

# VIP
[ex_lb]
192.168.1.10 LB_ROLE=master EX_APISERVER_VIP=192.168.1.100 EX_APISERVER_PORT=8443
192.168.1.20 LB_ROLE=backup EX_APISERVER_VIP=192.168.1.100 EX_APISERVER_PORT=8443
192.168.1.30 LB_ROLE=backup EX_APISERVER_VIP=192.168.1.100 EX_APISERVER_PORT=8443

...#此处省略
# Cluster container-runtime supported: docker, containerd
CONTAINER_RUNTIME="containerd"

# Network plugins supported: calico, flannel, kube-router, cilium, kube-ovn
CLUSTER_NETWORK="flannel"

...#此处省略

修改 config.yml 文件

vi /etc/kubeasz/clusters/k8s-01/config.yml

内容如下

############################
# role:kube-master
############################
# 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
MASTER_CERT_HOSTS:
  - "192.168.1.10"
  - "192.168.1.20"
  - "192.168.1.30"
  - "192.168.1.100"

开始安装 Kubernetes

安装

dk ezctl setup k8s-01 all

或一步一步安装

# 初始化集群配置
dk ezctl setup k8s-01 01
# 安装 etcd
dk ezctl setup k8s-01 02
...#此处省略

加载新配置
```
source ~/.bashrc
```
查看节点状态
```
kubectl get node
```

添加节点

官方文档

添加 worker

dk ezctl add-node k8s-01 192.168.1.40 k8s_nodename='k8s-master-4'

SSH 非 22 端口

dk ezctl add-node k8s-01 192.168.1.40 k8s_nodename='k8s-master-4' ansible_ssh_port=10022

添加 master

dk ezctl add-master k8s-01 192.168.1.40 k8s_nodename='k8s-master-4'

添加 etcd
```
dk ezctl add-etcd k8s-01 192.168.1.40
```

删除节点

删除 worker
```
dk ezctl del-node k8s-01 192.168.1.40
```

删除 master

dk ezctl del-master k8s-01 192.168.1.40

删除 etcd
```
dk ezctl del-etcd k8s-01 192.168.1.40
```

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