Docker迁移

一、源地址上操作

1、查看

docker ps

  2、停止

docker stop 78 5e c4 1f

 3、压缩数据（docker本地引用的文件夹）

 说明：docker引用本地文件夹为 /software

cd /software
tar -zcvf software.zip ./

4、容器生成镜像

[root@vm172-31-0-4 software]# docker commit 78 myredis
sha256:89fc607685c8cb8eb77ae8b4ff87f170f0e1eef6b7d63e2b4e77b7638511ae45
[root@vm172-31-0-4 software]# docker commit 5e mygitlab
sha256:5aa365de6037f16483511f06cd95fd72305aad7181d7a9e172a717b0f5695758
[root@vm172-31-0-4 software]# docker commit c4 mymysql
sha256:c5f369e98677421c7f7f53676d19527115f49a27b14547c8fe178bbeb0a9f589
[root@vm172-31-0-4 software]# docker commit 1f mynginx
sha256:c60ef01fe709cef958e17e90f08f1dffe190f1325ef3464709d7324d05f7101a
[root@vm172-31-0-4 software]# 

docker commit 容器名称 新的镜像名称

5、镜像导出为文件

docker  save -o 文件名.tar 镜像名

 6、传输文件到另一台服务器

scp *.zip root@120.92.86.214:/software

scp *.tar root@120.92.86.214:/software

 

二、目标地址上操作

1、查看

 

 2、解压

cd /software
tar -zxvf software.zip ./

3、恢复镜像

docker load -i image-nginx.tar

 4、查看镜像

 5、启动镜像

docker run -d -p 80:80  --name nginx -v /software/nginx/html:/etc/nginx/html -v /software/nginx/conf:/etc/nginx  -v /software/nginx/conf/nginx.conf:/etc/nginx/nginx.conf  -v /software/nginx/logs:/etc/nginx/logs mynginx

docker run -p 3360:3306 --name mysql \
  -v /software/mysql/conf:/etc/mysql \
  -v /software/mysql/logs:/var/log/mysql \
  -v /software/mysql/data:/var/lib/mysql \
  -v /software/mysql/mysql-files:/var/lib/mysql-files \
  -e MYSQL_ROOT_PASSWORD=123456 \
  -d mymysql

docker run -d -p 9443:443 -p 9080:80 -p 9022:22 \
--name gitlab --restart always \
--volume /software/gitlab/config:/etc/gitlab \
--volume /software/gitlab/logs:/var/log/gitlab \
--volume /software/gitlab/data:/var/opt/gitlab \
-m 300m \
--memory-swap=400m \
mygitlab

 

 

 

 

问题 

1、2台服务器均为云服务器，执行scp命令外网正常，由于文件过大，使用云内网传输报错

 

 解决方法，删除 /root/.ssh/known_hosts 中172.31.16.71的key

删除前

 删除后

 2、docker权限问题

docker exec -it gitlab update-permissions  
docker restart gitlab

 

 

docker部署gitlab的迁移

1、进入容器

docker exec -it 容器ID /bin/bash

2、备份

 gitlab-rake gitlab:backup:create /var/opt/gitlab/backups/

3、上传到目标服务器上

scp *.tar root@120.92.86.214:/software

3,新建一个gitlab

docker run -d -p 19443:443 -p 19080:80 -p 19022:22 \
--name gitlab --restart always \
--volume /software/gitlab/config:/etc/gitlab \
--volume /software/gitlab/logs:/var/log/gitlab \
--volume /software/gitlab/data:/var/opt/gitlab \
gitlab/gitlab-ce

4,进去 新容器 更改权限

复制文件到
/software/gitlab/data/backups
进入容器
docker exec -it  gitlab /bin/bash
进入目录
cd /var/opt/gitlab/backups
赋权
chown git.git 1605110004_2020_11_11_13.1.1_gitlab_backup.tar

 

 5,关闭相关服务

root@925449bfe3ee:/var/opt/gitlab# gitlab-ctl stop unicorn

ok: down: unicorn: 1s, normally up

root@925449bfe3ee:/var/opt/gitlab# gitlab-ctl stop sidekiq

ok: down: sidekiq: 1s, normally up

 

6 开始恢复(这里不要写全名  他会自动拼接)

gitlab-rake gitlab:backup:restore BACKUP=1553072122_2019_03_20_11.1.4

 

 

 

结束