1. 环境准备

• 安装 Docker

  # 查看已安装 docker
  yum list installed | grep docker
  # 卸载
  yum remove -y \
  containerd.io.x86_64 \
  docker-ce.x86_64 \
  docker-ce-cli.x86_64 \
  docker-ce-rootless-extras.x86_64 \
  docker-scan-plugin.x86_64
  
  # 通过脚本安装
  curl https://releases.rancher.com/install-docker/20.10.sh | sh
  

• 关闭防火墙 firewalld
• 关闭 SELinux

2. 安装 Rancher

• 启动 Rancher 服务

  docker run -d --restart=unless-stopped \
    -p 80:80 -p 443:443 \
    --privileged \
    rancher/rancher:v2.6.0
  

• 查看安装过程日志

  docker ps | grep rancher | awk '{print $1}' | xargs docker logs -f
  

• 日志中有打印初始密码

  2021/09/28 10:10:30 [INFO] -----------------------------------------
  2021/09/28 10:10:30 [INFO] Welcome to Rancher
  2021/09/28 10:10:30 [INFO] A bootstrap password has been generated for your admin user.
  2021/09/28 10:10:30 [INFO]
  2021/09/28 10:10:30 [INFO] Bootstrap Password: c66frm6dtlls945z4fw29kb9xkz66qxdrbbdxfpqghnpcp7c7pjkgq
  2021/09/28 10:10:30 [INFO]
  2021/09/28 10:10:30 [INFO] Use https://172.17.0.2/dashboard/?setup=c66frm6dtlls945z4fw29kb9xkz66qxdrbbdxfpqghnpcp7c7pjkgq to complete setup in the UI
  2021/09/28 10:10:30 [INFO] -----------------------------------------
  

• 或者安装完成后筛选过滤该密码

  docker logs  container-id  2>&1 | grep "Bootstrap Password:"
  

• 打开浏览器 http://192.168.1.10 输入初始密码
  

• 设置新密码
  

• 创建集群
  

• 选择自定义集群
  

• 参数保持默认即可
  

• 勾选全部角色，复制命令
  

• 执行加入节点命令

  sudo docker run -d --privileged --restart=unless-stopped --net=host \
    -v /etc/kubernetes:/etc/kubernetes \
    -v /var/run:/var/run  rancher/rancher-agent:v2.6.0 \
    --server https://192.168.1.10:443 \
    --token d7ck5vm5lshgm98wzvznbsfbnrtqmgnl6g2sxnk85ll5psw7xs7vgg 
    --ca-checksum 413df4f04a0f00ffaa9b445431e76da26dbd678c21b4d5111cbedbbb37d14588 \
    --etcd --controlplane --worker
  

• 等待时发现有报错
  

• 查看 etcd 日志，可能是网络不好，耐心等待

  docker logs -f etcd
  

• 一段时间后所有服务均正常，至此安装结束
  

3. 卸载 Rancher

• 删除 Rancher 并清理

# 删除容器
docker rm -f $(sudo docker ps -aq);
# 删除卷
docker volume rm $(sudo docker volume ls -q);
# 卸载 kubelet 挂载目录
for m in $(sudo tac /proc/mounts | sudo awk '{print $2}' | sudo grep /var/lib/kubelet);do
sudo umount $m||true
done
# 卸载 rancher 挂载目录
for m in $(sudo tac /proc/mounts | sudo awk '{print $2}' | sudo grep /var/lib/rancher);do
sudo umount $m||true
done
# 删除相关目录
rm -rf /etc/cni \
       /etc/kubernetes \
       /opt/cni \
       /opt/rke \
       /run/secrets/kubernetes.io \
       /run/calico \
       /run/flannel \
       /var/lib/calico \
       /var/lib/etcd \
       /var/lib/cni \
       /var/lib/kubelet \
       /var/lib/rancher \
       /var/log/containers \
       /var/log/pods \
       /var/run/calico

rm -f /var/lib/containerd/io.containerd.metadata.v1.bolt/meta.db
sudo systemctl restart containerd
sudo systemctl restart docker