Docker 中的 MySQL 挂载的目录权限在外部 SSD 上被搞砸了

Question

I'm running MySQL inside a docker image and I'm mounting a directory from the host inside the container to have the database persisted ./db:/var/lib/mysql .
Since the data got really big, I had to move everything to my external SSD. Now it seems that the permissions of the mounted directory are messed up. When I let MySQL container initialize the ./db directory, it's all good. But if I stop the containers, remove the external SSD, and connect it back and spin up the containers again, the MySQL container keeps restarting, logging things like:

chown: changing ownership of '/var/lib/mysql/._binlog.000004': Operation not permitted

• I'm running docker on my mac.
• ls -l : drwxrwxrwx@ 1 amir staff 131072 May 5 21:25 db .
• docker -v : Docker version 19.03.8, build afacb8b .
• docker-compose -v : docker-compose version 1.25.4, build 8d51620a

• docker-compose.yml :

   version: "3" services: db: image: mysql volumes: -./db:/var/lib/mysql restart: always ports: - "3306:3306" environment: MYSQL_ROOT_PASSWORD: password networks: - projectnetwork networks: projectnetwork:

Any hints to how I can solve this problem would be greatly appreciated:) Thank you!

Answer 1

Alright, I'm not sure if this is the best way to solve this, but I can get around the issue with this at the moment. Please let me know if this is totally dumb and there are better solutions.

I tried running the container with docker itself and passing --user "$(id -u):$(id -g)" and it worked.
Unfortunately, we can't do sub bash commands in docker-compose file, so I had to create my own script that sets an environment variable and runs docker-compose:

DOCKER_COMPOSE_USER=$(id -u):$(id -g) docker-compose up -d

And in docker-compose.yml :

user: ${DOCKER_COMPOSE_USER}

That did the trick!