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2019-05-06
问题现象
使用docker-compose部署web+mysql架构网站，出现docker-compose up -d启动之后，mysql容器自动退出现象
docker-compose.yml
version: ‘2‘ services: dzzoffice: image: cheggwpt/php7.2-nginx ports: - "80:80" volumes: - "/mnt/dzzoffice:/app" links: - db db: image: centos/mysql-57-centos7 environment: - MYSQL_USER=xxx - MYSQL_PASSWORD=xxx - MYSQL_DATABASE=xxx volumes: - "/mnt/mysql/data:/var/lib/mysql/data"
解决方案：
真正的问题所在其实就是在服务器上的volume目录/mnt/mysql/data和容器里目录/var/lib/mysql/data拥有者不一样导致的，那么如何查看拥有者，需要使用如下几条指令
查看容器中/var/lib/mysql的所有者
[root@gitlab dzzoffice]# docker run -ti --rm --entrypoint="/bin/bash" centos/mysql-57-centos7 -c "ls -la /var/lib/mysql" total 12 drwxrwxr-x 1 mysql root 4096 Apr 3 07:29 . drwxr-xr-x 1 root root 4096 Apr 3 07:29 .. drwxrwxr-x 1 mysql root 4096 Apr 3 07:29 data
以上可以看出，data属于mysql用户组，而在宿主机上，新建的data目录却属于root用户组
[root@gitlab mysql]# ll total 4 drwxr-xr-x 2 root root 4096 Apr 30 16:22 data
也就是说，这两个目录的所有者不同导致的权限问题，现在把他们的id统一就可以了，统一前要先查出来容器里的mysql用户组id，然后修改服务器的/mnt/mysql/data下的用户组id
查出来容器里的mysql用户组id
docker run -ti --rm --entrypoint="/bin/bash" centos/mysql-57-centos7 -c "cat /etc/group"
root:x:0:mysql bin:x:1: daemon:x:2: sys:x:3: adm:x:4: tty:x:5: disk:x:6: lp:x:7: mem:x:8: kmem:x:9: wheel:x:10: cdrom:x:11: mail:x:12: man:x:15: dialout:x:18: floppy:x:19: games:x:20: tape:x:33: video:x:39: ftp:x:50: lock:x:54: audio:x:63: nobody:x:99: users:x:100: utmp:x:22: utempter:x:35: input:x:999: systemd-journal:x:190: systemd-network:x:192: dbus:x:81: cgred:x:998: mysql:x:27:
可以看到mysql的组ID是27，将宿主机的data目录组ID改为27即可
[root@gitlab dzzoffice]# chown -R 27 mysql/data [root@gitlab dzzoffice]# cat /etc/group root:x:0: bin:x:1: daemon:x:2: sys:x:3: adm:x:4: tty:x:5: disk:x:6: lp:x:7: mem:x:8: kmem:x:9: wheel:x:10: cdrom:x:11: mail:x:12:postfix man:x:15: dialout:x:18: floppy:x:19: games:x:20: tape:x:30: video:x:39: ftp:x:50: lock:x:54: audio:x:63: nobody:x:99: users:x:100: utmp:x:22: utempter:x:35: avahi-autoipd:x:170: ssh_keys:x:999: systemd-journal:x:190: dbus:x:81: polkitd:x:998: dip:x:40: tss:x:59: ntp:x:38: slocate:x:21: postdrop:x:90: postfix:x:89: sshd:x:74: tcpdump:x:72: input:x:997: systemd-network:x:192: cgred:x:996: gitlab-www:x:995: git:x:994: gitlab-redis:x:993: gitlab-psql:x:992: gitlab-prometheus:x:991: mysql:x:27:
以上可看到修改后的data组ID已经改变，已经与容器内部data相同，再次启动容器，发现正常运行
[root@gitlab dzzoffice]# docker-compose up -d Creating dzzoffice_db_1 ... Creating dzzoffice_db_1 ... done Creating dzzoffice_dzzoffice_1 ... Creating dzzoffice_dzzoffice_1 Creating dzzoffice_dzzoffice_1 ... done [root@gitlab dzzoffice]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 9ec3fe00ec33 cheggwpt/php7.2-nginx "/entrypoint.sh su..." 1 second ago Up Less than a second 443/tcp, 9000/tcp, 0.0.0.0:8000->80/tcp dzzoffice_dzzoffice_1 62db492d56c5 centos/mysql-57-centos7 "container-entrypo..." 3 seconds ago Up 2 seconds 3306/tcp dzzoffice_db_1
参考文章：
https://blog.csdn.net/grape875499765/article/details/80089853
docker-compose内mysql 挂载数据库目录，启动时mysql容器自动退出
标签：alt vol The mys mon article names 挂载 图片
原文地址：https://www.cnblogs.com/fqxy/p/10821112.html
