Question

我在OSX上使用mariadb遇到了麻烦，我在CentOS上做了同样的事情并且工作正常。所以它必须是OSX问题：

mariadb:
  image: mariadb:latest
  container_name: mariadb
  ports:
    - "3306:3306"
  restart: always
  environment:
    MYSQL_ROOT_PASSWORD: XXXXXXXX
  volumes:
    - /Users/sandro/Code/mysql:/var/lib/mysql

日志包含以下错误：

mkdir: cannot create directory '/var/lib/mysql//mysql': Permission denied
Fatal error Can't create database directory '/var/lib/mysql//mysql'

如果我让它像这样安装在容器内：

volumes:
        - /var/lib/mysql

它有效，但我有持久性问题，一旦vm重新启动，dbs就会消失。

我尝试创建mysql目录并为其提供全局可写权限，并收到以下错误：

2016-05-20 23:43:54 140694234605504 [Note] mysqld (mysqld 10.1.14-MariaDB-1~jessie) starting as process 1 ...
2016-05-20 23:43:54 140694234605504 [Warning] Setting lower_case_table_names=2 because file system for /var/lib/mysql/ is case insensitive
2016-05-20 23:43:54 140694234605504 [Note] InnoDB: Using mutexes to ref count buffer pool pages
2016-05-20 23:43:54 140694234605504 [Note] InnoDB: The InnoDB memory heap is disabled
2016-05-20 23:43:54 140694234605504 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2016-05-20 23:43:54 140694234605504 [Note] InnoDB: Memory barrier is not used
2016-05-20 23:43:54 140694234605504 [Note] InnoDB: Compressed tables use zlib 1.2.8
2016-05-20 23:43:54 140694234605504 [Note] InnoDB: Using Linux native AIO
2016-05-20 23:43:54 140694234605504 [Note] InnoDB: Using SSE crc32 instructions
2016-05-20 23:43:54 140694234605504 [Note] InnoDB: Initializing buffer pool, size = 256.0M
2016-05-20 23:43:54 140694234605504 [Note] InnoDB: Completed initialization of buffer pool
2016-05-20 23:43:54 140694234605504 [ERROR] InnoDB: ./ibdata1 can't be opened in read-write mode
2016-05-20 23:43:54 140694234605504 [ERROR] InnoDB: The system tablespace must be writable!
2016-05-20 23:43:54 140694234605504 [ERROR] Plugin 'InnoDB' init function returned error.
2016-05-20 23:43:54 140694234605504 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2016-05-20 23:43:54 140694234605504 [ERROR] mysqld: File '/var/lib/mysql/aria_log_control' not found (Errcode: 13 "Permission denied")
2016-05-20 23:43:54 140694234605504 [ERROR] mysqld: Got error 'Can't open file' when trying to use aria control file '/var/lib/mysql/aria_log_control'
2016-05-20 23:43:54 140694234605504 [ERROR] Plugin 'Aria' init function returned error.
2016-05-20 23:43:54 140694234605504 [ERROR] Plugin 'Aria' registration as a STORAGE ENGINE failed.
2016-05-20 23:43:54 140694234605504 [Note] Plugin 'FEEDBACK' is disabled.
2016-05-20 23:43:54 140694234605504 [ERROR] Could not open mysql.plugin table. Some plugins may be not loaded
2016-05-20 23:43:54 140694234605504 [ERROR] Unknown/unsupported storage engine: InnoDB
2016-05-20 23:43:54 140694234605504 [ERROR] Aborting

Answer 1

使mysql容器以用户1000的身份运行。

在Dockerfile中：

USER "1000"

在docker-compose.yml

中

db:
   image: mysql
   user: "1000"

这是我当前的解决方法（通过docker-compose.yml完成）。 1000用户是 - 我相信 - docker卷中文件的默认用户（至少对于docker-machine），所以这应该让你写入卷。

Answer 2

很可能是它的许可问题。在Mac上，docker在虚拟框中运行，通过VM映射本地目录。获得权限是很棘手的。首先尝试在/ Users / sandro / Code目录上设置限制最少的权限。还要尝试预先创建/ Users / sandro / Code / myssql目录，并在启动容器之前为其提供全局可写权限。

更新：所以问题实际上更复杂。看起来你不能做很多低级文件调用，除非容器内的用户id与启动docker机器的用户的id匹配。以下是一些澄清此问题的链接：

https://www.bountysource.com/issues/5393565-1-3-0-only-root-can-write-to-osx-volumes-can-t-change-permissions-within

https://github.com/boot2docker/boot2docker/issues/581

问题出在boot2docker，MariaDB图像启动脚本，docker-compose和Virtual Box客户操作系统之间

我能够通过这样做运行maria db容器

mkdir mysql
chmod ug+ws mysql
docker run -it -u $UID:$UID -e MYSQL_ROOT_PASSWORD=bob \
         -v /Users/vlad/Proj/Stack/maria/mysql:/var/lib/mysql \
         mariadb:latest

请注意-u选项

Answer 3

错误消息中的路径看起来很奇怪： mkdir: cannot create directory '/var/lib/mysql//mysql': Permission denied

对我来说，看起来mariadb图像是在卷路径上追加/ mysql。通过删除docker-compose.yml文件中的/mysql，它就像魅力一样。

mdb:
  image: mariadb
  environment:
    MYSQL_ROOT_PASSWORD: password
  volumes:
    - ./data:/var/lib

OS X上的mariadb docker容器：无法创建数据库目录

3 个答案: