mirror of https://github.com/easzlab/kubeasz.git
76 lines
2.6 KiB
Markdown
76 lines
2.6 KiB
Markdown
|
## 增加 kube-master 节点
|
|||
|
|
|
|||
|
|
注意：目前仅支持按照本项目`多主模式`(hosts.m-masters.example)部署的`k8s`集群增加`master`节点
|
|||
|
|
|
|||
|
|
新增`kube-master`节点大致流程为：
|
|||
|
- LB节点重新配置 haproxy并重启 haproxy服务
|
|||
|
|
- 新节点预处理 prepare
|
|||
|
|
- 新节点安装 docker 服务
|
|||
|
|
- 新节点安装 kube-master 服务
|
|||
|
|
- 新节点安装 kube-node 服务
|
|||
|
|
- 新节点安装网络插件相关
|
|||
|
|
- 禁止业务 pod调度到新master节点
|
|||
|
|
|
|||
|
|
### 操作步骤
|
|||
|
|
|
|||
|
|
按照本项目说明，首先确保deploy节点能够ssh免密码登陆新增节点，然后在**deploy**节点执行三步：
|
|||
|
|
|
|||
|
|
- 修改ansible hosts 文件，在 [new-master] 组添加新增的节点；在[lb] 组添加新增master 节点，举例如下：
|
|||
|
|
|
|||
|
|
``` bash
|
|||
|
|
[lb]
|
|||
|
|
192.168.1.1 LB_IF="ens3" LB_ROLE=backup
|
|||
|
|
192.168.1.2 LB_IF="ens3" LB_ROLE=master
|
|||
|
|
[lb:vars]
|
|||
|
|
master1="192.168.1.1:6443"
|
|||
|
|
master2="192.168.1.2:6443"
|
|||
|
|
master3="192.168.1.5:6443" # 新增 master节点
|
|||
|
|
...
|
|||
|
|
[new-master]
|
|||
|
|
192.168.1.5 NODE_IP="192.168.1.5" # 新增 master节点
|
|||
|
|
|
|||
|
|
```
|
|||
|
|
- 修改roles/lb/templates/haproxy.cfg.j2 文件，增加新增的master节点，举例如下：
|
|||
|
|
|
|||
|
|
``` bash
|
|||
|
|
listen kube-master
|
|||
|
|
bind 0.0.0.0:{{ KUBE_APISERVER.split(':')[2] }}
|
|||
|
|
mode tcp
|
|||
|
|
option tcplog
|
|||
|
|
balance source
|
|||
|
|
server s1 {{ master1 }} check inter 10000 fall 2 rise 2 weight 1
|
|||
|
|
server s2 {{ master2 }} check inter 10000 fall 2 rise 2 weight 1
|
|||
|
|
server s3 {{ master3 }} check inter 10000 fall 2 rise 2 weight 1 # 新增 master节点
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
- 执行安装脚本
|
|||
|
|
|
|||
|
|
``` bash
|
|||
|
|
$ cd /etc/ansible && ansible-playbook 21.addmaster.yml
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
### 验证
|
|||
|
|
|
|||
|
|
``` bash
|
|||
|
|
# 在新节点master 服务状态
|
|||
|
|
$ systemctl status kube-apiserver
|
|||
|
|
$ systemctl status kube-controller-manager
|
|||
|
|
$ systemctl status kube-scheduler
|
|||
|
|
|
|||
|
|
# 查看新master的服务日志
|
|||
|
|
$ journalctl -u kube-apiserver -f
|
|||
|
|
|
|||
|
|
# 查看集群节点，可以看到新 master节点 Ready, 并且禁止了POD 调度功能
|
|||
|
|
$ kubectl get node
|
|||
|
|
NAME STATUS ROLES AGE VERSION
|
|||
|
|
192.168.1.1 Ready,SchedulingDisabled <none> 3h v1.9.3
|
|||
|
|
192.168.1.2 Ready,SchedulingDisabled <none> 3h v1.9.3
|
|||
|
|
192.168.1.3 Ready <none> 3h v1.9.3
|
|||
|
|
192.168.1.4 Ready <none> 3h v1.9.3
|
|||
|
|
192.168.1.5 Ready,SchedulingDisabled <none> 2h v1.9.3 # 新增 master节点
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
### 后续
|
|||
|
|
|
|||
|
|
上述步骤验证成功，确认新节点工作正常后，为了方便后续再次添加节点，在ansible hosts文件中，把 [new-master] 组下的节点全部复制到 [kube-master] 组下，并清空 [new-master] 组中的节点。
|