I managed to deploy my Phoenix App on an external virtual server using Docker. The only thing missing is the call of “migrate” to run the migrations before the server starts. I started using the official Phoenix Dockerfile and added a docker-compose.yml with an additional Postgres container. The se…

I’m using Elixir releases with a Dockerfile similar to the one in the Phoenix guides . Here’s the last line: CMD ["sh", "-c", "bin/app eval MyApp.Release.migrate && bin/app start"] If the migrations fail, the app is not started and the whole deployment fails (which is what I want).

You should remember that you don’t have mix after you created a release version, instead you can use Ecto.Migrator for those tasks. I’ve tried several methods of doing migrations, and the best method on running production environments is to run migration via remote console , you can do this by start…

The script /app/bin/migrate actually uses Ecto.Migrator, so this is not an issue. I struggle with the call of this in the Dockerfile.

instead of calling /app/bin/server call your script and at the last line start the server.

I tried this (the last two lines of my Dockerfile): RUN /app/bin/migrate CMD [“/app/bin/server”] But there’s an error saying: environment variable DATABASE_URL is missing But it’s set in the docker_compose.yml: version: “3” networks: internal: external: false services: app: image: server …

this will not work, you are trying to execute migrations at the moment you build the container, you have to execute them when the container is started. This means that your migration script should be in last CMD.

I haven’t figured out how to change my Dockerfile to run migrations automatically after the firing up the server using “docker-compose up”. Anyway, this isn’t so important as I can log into the container and start the “migrate” script manually. But I still haven’t found a solution to run seed.exs w…

[image] gmc: I haven’t figured out how to change my Dockerfile to run migrations automatically after the firing up the server using “docker-compose up” I haven’t checked but at least if you want docker run ... to “automatically” run a command then you do it e.g. like this: # ... ENV MIX_ENV…

Thanks, this is what I was looking for!

In addition, I would recommend to put the exec command before start the app. CMD ["sh", "-c", "bin/app eval MyApp.Release.migrate && exec bin/app start"] Without this You’ll not be able to use Ctrl+C to kill the process when you start the app with docker run. In my case I’ve create a new shell f…

Would be Googler’s heres for Phoenix 1.7.0 and above. I ran mix phx.gen.release --docker and it generated the Dockerfile for me. It also generated a migrate and server file. in rel/overlays/bin/server... #!/bin/sh cd -P -- "$(dirname -- "$0")" PHX_SERVER=true exec ./my_app start in rel/overlays…

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Run migrations on Docker Production

Questions & Help Questions

dimitarvp September 29, 2023, 12:54pm 17

The COPY command has a --chmod option btw.