Running github actions on docker containers

 Running job on a docker container.

name: Container

on: push

jobs:

  node-docker:

    runs-on: ubuntu-latest

    container: 

      image: node:13.5.0-alpine3.10

    steps:

      - name: Log node version 

        run:  |

          node -v

          cat /etc/os-release

A sample Dockerfile for a nodejs app available.

#Dockerfile for nodejs app

FROM node:10.13-alpine

WORKDIR /usr/src/app

COPY package*.json ./

RUN npm install

COPY . .

EXPOSE 3000

CMD node app.js

#docker-compose.yml

version: '2.1'

services:

 app:

   build: .

   ports:

     - 3001:3000

 mongo:

   image: mongo

   ports:

     - "27017:27017"

docker-compose build

docker-compose start

Using the docker-compose multiple containers

#Multiple containers in github actions, using services instead of container section

name: Multiple Containers

on: push

jobs:

  node-docker:

    runs-on: ubuntu-latest

    services: 

      app:

        image: docker-username/node-api-imagename

        ports:

          - 3001:3000

      mongo:

        image: mongo

        ports:

          - "27017:27017"

    steps:

      - name: get user

        run:  curl http://localhost:3001/api/users

To use docker containers for individual steps of job.

#docker containers inside individual steps

name: Containers

on: push

jobs:

  docker-steps:

    runs-on: ubuntu-latest

    container:

      image: node:10.18.0-jessie

    steps:

      - name: log node version 

        run: node -v 

      - name: Step with docker

        uses: docker://node:12.14.1-alpine3.10

        with: 

          # Same as entrypoint in dockerfile but with different syntax

          entrypoint: '/bin/echo'

          args: 'Hello World' # for multiple values ['']

      - name: Step with docker

        uses: docker://node:12.14.1-alpine3.10

        with: 

          entrypoint: '/usr/local/bin/node'

          args: -v