Docker 容器迁移
Docker 容器迁移1.把集群中docker node降级
(1)# docker node demote pro-star-kv224-85
2.在node上停止docker进程和修改配置
(1)停止docker服务
①#systemctl daemon-reload
②#service docker stop //如果停止不了就用pkill -9 docker
(2)#mkdir /data1/docker
(3)vim /etc/systemd/system/multi-user.target.wants/docker.service
//ExecStart=/usr/bin/dockerd改为ExecStart=/usr/bin/dockerd --graph=/data1/docker
http://i2.运维网.com/images/blog/201811/06/b8121574303e2f5577a36a2f2f224081.png
(4)删除移动/var/lib/docker中的文件到新目录
#mv /var/lib/docker/ /data1/docker
#rm -rf /var/lib/docker/
(5)卸载overlay挂载
http://i2.运维网.com/images/blog/201811/06/405a439035e40d3fb5216d3764db320a.png
如果出现如上提示则：
#umount overlay
#umount shm
3.在集群中删除该node
(1) 查看node状态
http://i2.运维网.com/images/blog/201811/06/3724b8e451b4ea44f358b3f1e1275624.png
(2)#docker node rm pro-star-kv224-85
4.重启docker服务
①#systemctl daemon-reload
②#service docker start
(2)查看结果
#docker info
http://i2.运维网.com/images/blog/201811/06/61b32a1a12de6e58f68f8cd52390ea7b.png
5.把node重新加入到集群
(1)获取token值：
①#docker swarm join-token manager
http://i2.运维网.com/images/blog/201811/06/1ccd98e5186177ed359b8fa3b42676f7.png
6.在node端运行添加
(1)#docker swarm join --token SWMTKN-1-20fd8y0rs2hu5bjcee808bm9oocyoqae1gybsjnwd8skvdd4aa-04rarseip7h9ke6609d6fdrqe 192.168.224.81:2377
(2)#docker node ls
http://i2.运维网.com/images/blog/201811/06/ba4125f096d576abd2fd66fc8444fc16.png
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