声明:这是我在大学毕业后进入第二家互联网公司学习的内容

背景

服务器根路径磁盘快满了，检查下发现是docker的占用空间过大，所以我准备将docker的默认路径更换到一个2T的磁盘里

操作

/data是新磁盘的挂载路径

systemctl stop docker
cp -r /var/lib/docker  /data/ 
vim /etc/docker/daemon.json
添加一行"graph": "/data/docker"

{
  "registry-mirrors":["https://wghlmi3i.mirror.aliyuncs.com"],
  "graph": "/data/docker"
}
systemctl start docker

docker info查看Docker Root Dir: /data/docker说明更换成功

结果docker ps -a查看发现数据库启动失败，看看报错

报错

docker logs -f mysql

2021-09-25 02:49:14+00:00 [Note] [Entrypoint]: Entrypoint script for MySQL Server 5.7.28-1debian9 started.
2021-09-25 02:49:14+00:00 [Note] [Entrypoint]: Switching to dedicated user 'mysql'
2021-09-25 02:49:14+00:00 [Note] [Entrypoint]: Entrypoint script for MySQL Server 5.7.28-1debian9 started.
mysqld: [Warning] World-writable config file '/etc/mysql/my.cnf' is ignored.
2021-09-25T02:49:14.878098Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2021-09-25T02:49:14.879458Z 0 [Note] mysqld (mysqld 5.7.28) starting as process 1 ...
2021-09-25T02:49:14.881740Z 0 [Note] InnoDB: PUNCH HOLE support available
2021-09-25T02:49:14.881752Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2021-09-25T02:49:14.881754Z 0 [Note] InnoDB: Uses event mutexes
2021-09-25T02:49:14.881756Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2021-09-25T02:49:14.881757Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2021-09-25T02:49:14.881759Z 0 [Note] InnoDB: Using Linux native AIO
2021-09-25T02:49:14.881941Z 0 [Note] InnoDB: Number of pools: 1
2021-09-25T02:49:14.882025Z 0 [Note] InnoDB: Using CPU crc32 instructions
2021-09-25T02:49:14.883068Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2021-09-25T02:49:14.888269Z 0 [Note] InnoDB: Completed initialization of buffer pool
2021-09-25T02:49:14.889777Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2021-09-25T02:49:14.900994Z 0 [ERROR] InnoDB: Unable to open undo tablespace './/undo001'.
2021-09-25T02:49:14.901009Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2021-09-25T02:49:15.502467Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2021-09-25T02:49:15.502516Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2021-09-25T02:49:15.502529Z 0 [ERROR] Failed to initialize builtin plugins.
2021-09-25T02:49:15.502536Z 0 [ERROR] Aborting