Codefresh.io matrix configuration for running parallel tests with Knapsack Pro for Ruby on Rails project (PostgreSQL + Docker setup). Follow installation guide for knapsack_pro ruby gem here https://docs.knapsackpro.com/knapsack_pro-ruby/guide/ or learn more about it at https://knapsackpro.com

codefresh.yml

# .codefresh/codefresh.yml
version: "1.0"

stages:
  - "clone"
  - "build"
  - "tests"

steps:
  main_clone:
    type: "git-clone"
    description: "Cloning main repository..."
    repo: "${{CF_REPO_OWNER}}/${{CF_REPO_NAME}}"
    revision: "${{CF_BRANCH}}"
    stage: "clone"
  BuildTestDockerImage:
    title: Building Test Docker image
    type: build
    arguments:
      image_name: '${{CF_ACCOUNT}}/${{CF_REPO_NAME}}-test'
      tag: '${{CF_BRANCH_TAG_NORMALIZED}}-${{CF_SHORT_REVISION}}'
      dockerfile: Test.Dockerfile
    stage: "build"

  run_tests:
    stage: "tests"
    image: '${{BuildTestDockerImage}}'
    working_directory: /src
    fail_fast: false
    environment:
      - RAILS_ENV=test
      # set how many parallel jobs you want to run
      - KNAPSACK_PRO_CI_NODE_TOTAL=2
      - PGHOST=postgres
      - PGUSER=rails-app-with-knapsack_pro
      - PGPASSWORD=password
    services:
      composition:
        postgres:
          image: postgres:latest
          environment:
            - POSTGRES_DB=rails-app-with-knapsack_pro_test
            - POSTGRES_PASSWORD=password
            - POSTGRES_USER=rails-app-with-knapsack_pro
          ports:
            - 5432
    matrix:
      environment:
        # please ensure you have here listed N-1 indexes
        # where N is KNAPSACK_PRO_CI_NODE_TOTAL
        - KNAPSACK_PRO_CI_NODE_INDEX=0
        - KNAPSACK_PRO_CI_NODE_INDEX=1
    commands:
      - bin/rails db:prepare

      # run tests in Knapsack Pro Regular Mode
      - bundle exec rake knapsack_pro:rspec
      - bundle exec rake knapsack_pro:cucumber
      - bundle exec rake knapsack_pro:minitest
      - bundle exec rake knapsack_pro:test_unit
      - bundle exec rake knapsack_pro:spinach

      # you can use Knapsack Pro in Queue Mode once recorded first CI build with Regular Mode
      - bundle exec rake knapsack_pro:queue:rspec
      - bundle exec rake knapsack_pro:queue:cucumber
      - bundle exec rake knapsack_pro:queue:minitest

Test.Dockerfile

# Test.Dockerfile
FROM ruby:2.6.5-alpine3.10

# Prepare Docker image for Nokogiri
RUN apk add --update \
  build-base \
  libxml2-dev \
  libxslt-dev \
  jq \
  nodejs \
  npm \
  postgresql-dev \
  python3-dev \
  sqlite-dev \
  git \
  && rm -rf /var/cache/apk/*

# Install AWS CLI
RUN pip3 install awscli

# Use libxml2, libxslt a packages from alpine for building nokogiri
RUN bundle config build.nokogiri --use-system-libraries

# Install Codefresh CLI
RUN wget https://github.com/codefresh-io/cli/releases/download/v0.31.1/codefresh-v0.31.1-alpine-x64.tar.gz
RUN tar -xf codefresh-v0.31.1-alpine-x64.tar.gz -C /usr/local/bin/

COPY . /src

WORKDIR /src

RUN bundle install