回答问题
我的 docker-compose 脚本成功地运行了 mysql/mariadb 服务,并将包含数据库模式的“init.sql”脚本复制到“/docker-entrypoint-initdb.d”。但是,根据文档](https://hub.docker.com/_/mariadb/),sql 脚本永远不会像[那样执行。
没有错误,日志中没有任何内容。我检查了 sql 文件是否复制到容器中的正确位置。我检查了脚本在空数据库上运行时没有错误。
我错过了什么?如果脚本被执行(并且由于某种原因什么也没做),它甚至在日志中可见吗?
(编辑: docker-compose 版本:1.8.1,图像 mariadb:10.1.21)
# docker-compose.yml
version: '2'
volumes:
data-volume: {}
services:
mysql:
image: mariadb
ports:
- "3306:3306"
environment:
MYSQL_ROOT_PASSWORD: pwd
MYSQL_DATABASE: users_db
volumes:
- data-volume:/var/lib/mysql
- ./resources/docker-sql/init.sql:/docker-entrypoint-initdb.d/init.sql
backend:
image: myapp
ports:
- "8000:80"
depends_on:
- mysql
links:
- mysql
Answers
查看 mariadb 映像的docker-entrypoint.sh
文件的来源,该脚本应该执行您的init.sql
,很明显
-
脚本只会在容器之前不包含数据库时执行(脚本第 76 行),并且
-
会有一个日志输出通知你你的脚本被调用了。
要使用docker-compose
实现此目的,您必须停止服务,删除容器(以摆脱数据库)并重新启动它:
docker-compose stop
docker-compose rm
docker-compose start
这是图像行为的示例,仅使用.sh
文件而不是.sql
:
$ cat hello.sh
echo "This is output of the hello script"
$ docker run -it -v `pwd`/hello.sh:/docker-entrypoint-initdb.d/hello.sh -v mariadb_test:/var/lib/mysql -e MYSQL_RANDOM_ROOT_PASSWORD=1 mariadb
Initializing database
2017-02-09 14:13:54 140617005938624 [Note] /usr/sbin/mysqld (mysqld 10.1.21-MariaDB-1~jessie) starting as process 63 ...
2017-02-09 14:13:54 140617005938624 [Note] InnoDB: Using mutexes to ref count buffer pool pages
2017-02-09 14:13:54 140617005938624 [Note] InnoDB: The InnoDB memory heap is disabled
2017-02-09 14:13:54 140617005938624 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
[...]
2017-02-09 14:14:03 139836212086528 [Note] InnoDB: Dumping buffer pool(s) not yet started
2017-02-09 14:14:03 139836971521984 [Note] Plugin 'FEEDBACK' is disabled.
2017-02-09 14:14:03 139836971521984 [Warning] 'user' entry 'root@830dbd0908f3' ignored in --skip-name-resolve mode.
2017-02-09 14:14:03 139836971521984 [Warning] 'proxies_priv' entry '@% root@830dbd0908f3' ignored in --skip-name-resolve mode.
2017-02-09 14:14:03 139836971521984 [Note] mysqld: ready for connections.
Version: '10.1.21-MariaDB-1~jessie' socket: '/var/run/mysqld/mysqld.sock' port: 0 mariadb.org binary distribution
Warning: Unable to load '/usr/share/zoneinfo/leap-seconds.list' as time zone. Skipping it.
GENERATED ROOT PASSWORD: dau6voh4eej2jooRohpiop4eh6ahl7Uz
2017-02-09 14:14:05 139836970654464 [Warning] 'proxies_priv' entry '@% root@830dbd0908f3' ignored in --skip-name-resolve mode.
/usr/local/bin/docker-entrypoint.sh: running /docker-entrypoint-initdb.d/hello.sh
This is output of the hello script
2017-02-09 14:14:05 139836970351360 [Note] mysqld: Normal shutdown
2017-02-09 14:14:05 139836970351360 [Note] Event Scheduler: Purging the queue. 0 events
2017-02-09 14:14:05 139836195301120 [Note] InnoDB: FTS optimize thread exiting.
2017-02-09 14:14:05 139836970351360 [Note] InnoDB: Starting shutdown...
2017-02-09 14:14:05 139836970351360 [Note] InnoDB: Waiting for page_cleaner to finish flushing of buffer pool
2017-02-09 14:14:07 139836970351360 [Note] InnoDB: Shutdown completed; log sequence number 1616829
2017-02-09 14:14:07 139836970351360 [Note] mysqld: Shutdown complete
MySQL init process done. Ready for start up.
[...]
您会在日志输出的某处看到hello.sh
脚本的调用及其标准输出被掩埋。在容器的后续启动中,不会执行脚本,因为数据库已经创建(在本地 mariadb 卷中):
$ docker run -it -v `pwd`/hello.sh:/docker-entrypoint-initdb.d/hello.sh -v mariadb_test:/var/lib/mysql -e MYSQL_RANDOM_ROOT_PASSWORD=1 mariadb
2017-02-09 14:19:13 140155189532608 [Note] mysqld (mysqld 10.1.21-MariaDB-1~jessie) starting as process 1 ...
2017-02-09 14:19:13 140155189532608 [Note] InnoDB: Using mutexes to ref count buffer pool pages
2017-02-09 14:19:13 140155189532608 [Note] InnoDB: The InnoDB memory heap is disabled
2017-02-09 14:19:13 140155189532608 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2017-02-09 14:19:13 140155189532608 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2017-02-09 14:19:13 140155189532608 [Note] InnoDB: Compressed tables use zlib 1.2.8
2017-02-09 14:19:13 140155189532608 [Note] InnoDB: Using Linux native AIO
2017-02-09 14:19:13 140155189532608 [Note] InnoDB: Using SSE crc32 instructions
2017-02-09 14:19:13 140155189532608 [Note] InnoDB: Initializing buffer pool, size = 256.0M
2017-02-09 14:19:13 140155189532608 [Note] InnoDB: Completed initialization of buffer pool
2017-02-09 14:19:13 140155189532608 [Note] InnoDB: Highest supported file format is Barracuda.
2017-02-09 14:19:13 140155189532608 [Note] InnoDB: 128 rollback segment(s) are active.
2017-02-09 14:19:13 140155189532608 [Note] InnoDB: Waiting for purge to start
2017-02-09 14:19:13 140155189532608 [Note] InnoDB: Percona XtraDB (http://www.percona.com) 5.6.34-79.1 started; log sequence number 1616839
2017-02-09 14:19:13 140154429736704 [Note] InnoDB: Dumping buffer pool(s) not yet started
2017-02-09 14:19:13 140155189532608 [Note] Plugin 'FEEDBACK' is disabled.
2017-02-09 14:19:13 140155189532608 [Note] Server socket created on IP: '::'.
2017-02-09 14:19:13 140155189532608 [Warning] 'proxies_priv' entry '@% root@830dbd0908f3' ignored in --skip-name-resolve mode.
2017-02-09 14:19:13 140155189532608 [Note] mysqld: ready for connections.
Version: '10.1.21-MariaDB-1~jessie' socket: '/var/run/mysqld/mysqld.sock' port: 3306 mariadb.org binary distribution