yesod devel + stack + docker compose

[Matthew Griffith]

Hello!

I have a yesod site that sits behind nginx and connects to a postgres database.  I'm currently trying to use docker-compose to simplify deployment and I was hoping to get some advice on how to get it working.

The docker-compose.yml that I'm using, which is meant for local development, is pasted below. I have a separate one that is used for deployment, but I figure if I can get this working, the other will follow.

db:

  restart: always

  image: postgres:latest

  environment:

    POSTGRES_PASSWORD: postgres

    POSTGRES_USER: postgres

  expose:

    - "5432"

nginx:

  restart: always

  build: ./nginx/

  ports:

    - "80:80"

  volumes:

    - /www/static

  volumes_from:

    - server

  links:

    - server:server

server:

  restart: always

  command: stack exec yesod devel

  build: ./web/

  expose:

    - "3000"

  links:

    - db

  volumes:

    - ./web:/usr/src/app

The Dockerfile for the Yesod app is 

FROM fpco/stack-build

RUN mkdir -p /usr/src/app

WORKDIR /usr/src/app

COPY . /usr/src/app

RUN stack build

Currently, when I run this by spinning up a machine through docker-machine and running

docker-compose build
docker-compose up -d

The build succeeds as far as I can tell, but runnning the composition fails with

You are not the owner of '/usr/src/app/.stack-work/'. Aborting to protect file permissions.

Retry with '--allow-different-user' to disable this precaution.

After adding --allow-different-user  (which I'd rather not use if it isn't necessary)

It fails with

Executable named yesod not found on path: ["/usr/src/app/.stack-work/install/x86_64-linux/lts-5.11/7.10.3/bin","/root/.stack/snapshots/x86_64-linux/lts-5.11/7.10.3/bin","/opt/host/bin","/opt/stackage/lts-5/extra/bin","/opt/stackage/lts-5/ghc/bin","/opt/stackage/lts-5/tools/bin","/usr/local/sbin","/usr/local/bin","/usr/sbin","/usr/bin","/sbin","/bin"]

As a side note, I know that stack has the ability to create docker images (which is fantastic), though I don't know how to make that capability work with docker-compose.  I'm used to just throwing a Dockerfile in a directory and referencing it in the docker-compose.yml.

I feel like I'm missing something basic, can anyone point me in the right direction?

Much appreciated!

-Matt

[Michael Snoyman]

The Stack image you're using doesn't have the yesod executable. You could build it by running stack build yesod-bin, but most likely you want to create your own build image that has all your dependencies precompiled.

--
You received this message because you are subscribed to the Google Groups "Yesod Web Framework" group.
To unsubscribe from this group and stop receiving emails from it, send an email to yesodweb+u...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[Matthew Griffith]

Thank you, that was the nudge I needed.