kubeasz部署高可用kubernetes集群

kubeasz部署高可用kubernetes集群

环境信息

角色	IP地址	系统版本	配置
kubeasz管理节点	192.168.121.20	centos7.8	2核4G
master1(etcd1)	192.168.121.11	centos7.8	2核4G
master2(etcd2)	192.168.121.12	centos7.8	2核4G
master3(etcd3)	192.168.121.13	centos7.8	2核4G
node1	192.168.121.14	centos7.8	2核4G
node2	192.168.121.15	centos7.8	2核4G

一、下载kubeasz(kubeasz管理节点执行)

1、下载easzup

curl -C- -fLO --retry 3 https://github.com/easzlab/kubeasz/releases/download/2.2.1/easzup
chmod a+x easzup
mv  easzup /usr.local/bin/
easzup -D

2、配置集群信息

cp /etc/ansible/example/hosts.multi-node  /etc/ansible/hosts
根据规划修改/etc/ansible/hosts中配置信息

3、配置互信、验证节点是否免密

bash /etc/ansible/tools/yc-ssh-key-copy.sh /etc/ansible/hosts username password
 ansible all -m ping

4、部署k8s

 #ansible all -m shell -a "wget https://bootstrap.pypa.io/get-pip.py -P /tmp/"
 #ansible all -m shell -a   "python /tmp/get-pip.py"
#ansible all -m shell -a  "pip install netaddr -i https://pypi.tuna.tsinghua.edu.cn/simple"
#ansible all -m shell -a   "rm -rf /tmp/get-pip.py"
easzup -S
docker exec -it kubeasz bash
cd /etc/ansible/
ansible-playbook 90.setup.yml

5、查看集群信息

kubectl version
kubectl get cs
kubectl get node -o wide
kubectl cluster-info

二、easzctl管理kubernetes集群

1、删除master节点、添加master节点

easzctl del-master 192.168.121.13 
kubectl delete node 192.168.121.13 

easzctl add-master 192.168.121.13

2、删除etcd节点、添加etcd节点

easzctl del-etcd 192.168.121.13
easzctl add-etcd 192.168.121.13
输入新的etcd节点名称(etcd-2)

3、删除node节点、添加node节点

 easzctl del-node 192.168.121.15
 kubectl delete node 192.168.121.15
 
 easzctl add-node 192.168.121.15

4、删除集群

easzctl  destroy 
ansible all -m shell -a "reboot"

5、管理节点清理

easzup -C
docker system prune -a
systemctl stop docker
rm -rf /etc/ansible /etc/docker /opt/kube
umount /var/run/docker/netns/default
umount /var/lib/docker/overlay
rm -rf /var/lib/docker /var/run/docker
reboot