build contains unsupported option: 'ports' - docker

Question

Trying to use docker-compose for the first time, but not having much luck. I have the following setup:
docker-compose version 1.8.0, build f3628c7
/home/GabeThermComposer contains the docker-compose.yml
/home/GabeThermComposer/GabeThermApache contains Dockerfile
/home/GabeThermComposer/GabeThermPHPMyAdmin contains Dockerfile
/home/GabeThermComposer/GabeThermDB contains Dockerfile and nest-init.sql
When I create docker images using the Dockerfile in each subdir, it all works without issues. I was hoping with the docker-compose.yml to do all the seperate building of images at once.
The docker-compose.yml looks like this:
version: '2'
services:
GabeThermDB:
build:
context: ./GabeThermDB
dockerfile: Dockerfile
GabeThermApache:
build:
context: ./GabeThermApache
dockerfile: Dockerfile
ports:
- "80:80"
GabeThermPHPMyAdmin:
build:
context: ./GabeThermPHPMyAdmin
dockerfile: Dockerfile
ports:
- "8080:80"
When trying to run "docker-compose up", I get the following error:
ERROR: The Compose file './docker-compose.yml' is invalid because:
services.GabeThermPHPMyAdmin.build contains unsupported option: 'ports'
services.GabeThermApache.build contains unsupported option: 'ports'
I have no clue on what is wrong with this. I think I did exactly as other examples have shown. Btw, I do know that the "context:" and "dockerfile:" is overdone, but since I'm new, I wanted to be sure to what files I'm pointing in case I forget it automatically dives into the subdir and runs the Dockerfile.
Any help is appreciated.

Answer 1

You have to move the ports out of the build block.
version: '2'
services:
GabeThermDB:
build:
context: ./GabeThermDB
dockerfile: Dockerfile
GabeThermApache:
build:
context: ./GabeThermApache
dockerfile: Dockerfile
ports:
- "80:80"
GabeThermPHPMyAdmin:
build:
context: ./GabeThermPHPMyAdmin
dockerfile: Dockerfile
ports:
- "8080:80"