将 DDEV 数据库挂载到主机文件系统而不是在 docker 卷内

Question

I've a project with a large database (more or less 50GB) and since i have to run also other projects with docker/ddev this could be a problem, i for sure can make the size of the docker disk but i wanted to know if it's possible for a certain project keep the database outside docker...
With plain docker (docker-compose) projects i keep a "data" folder that's not inside docker, i would like to do more or less the same thing with ddev if it's possible.
Now i'm on OSX, but if it's possible also in Win10 it would be great.
Thanks!

Answer 1

ddev used to mount the database onto the host with a bind-mount, but docker has quite a number of problems with that, especially on Windows. It worked OK on mac and Linux though, didn't work well on Docker Toolbox on Win10 Home. Docker volumes are more reliable for interacting, and faster, because they're on a linux volume.

However, you could make a .ddev/docker-compose.bindmountdb.yaml with contents like this, which basically switches back to the old approach, and bind-mounts the database into the project's .ddev/db directory.

version: "3.6"

services:
  db:
    volumes:
    - type: "bind"
      source: "./db"
      target: "/var/lib/mysql"

Answer 2

Another option, of course, is to run a MySQL/MariaDB server on your host computer, for that huge database. Your project could then access the database on the host using the hostname "host.docker.internal". This gets you into the business of running and managing your own database server on the host, but with a huge database it might be appropriate. You could also run the db server elsewhere on your local network, which is the same basic idea; the db server just has to be accessible from inside the web container. In either of these cases, you could use omit_containers: [db] and just not use the db container at all.