如何使用初始化的数据库创建Docker映像

Question

I want to use the official mysql docker image to create an new image with an initialized database and imported dump file. The default command is mysqld , so I wonder how I can achieve this. Is there a way to only initialize the database and import a dump, without starting the mysql daemon?

Answer 1

The MySQL docker images automatically parse .sh .sql and .sql.gz from the /docker-entrypoint-initdb.d directory on first start up. Files will be executed in alphabetical order.

Dump your existing database to a file, then edit your Dockerfile to add:

ADD mysqldump.sql /docker-entrypoint-initdb.d/mysqldump.sql

On first start, mysqldump.sql will be imported.

Answer 2

An option would be to access the bash shell of the docker container (please see "Container shell access and viewing MySQL logs" section in https://hub.docker.com/_/mysql/ ), import your dump file (you can use docker cp to copy the dump file from your host system to the docker container) and once you are done, you can use docker commit command to create a new docker image from your current running container. And you can use the newly created image afterwards.

Hope this helps.

Answer 3

I just found a solution for mysql:5.7 . I execute the slightly modified entrypoint.sh during the build process:

COPY ./docker-entrypoint.sh /
RUN /docker-entrypoint.sh mysqld

In the docker-entrypoint.sh I deleted the last line:

exec "$@

It looks ugly, but it works so far.