DevOps Classroom notes 28/Jul/2026

Dynamic enviroment variables:

name: Dynamic enviroment

on: 
  push:
    branches: '*'

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - name: checkout
        uses: actions/checkout@v7

      - name: install chart version
        run: |
          echo "BUILD_ID=$(date +%d-%m-%Y)"
         

GITHUB summary:

* to add infromation about your build 

name: Dynamic enviroment

on: 
  push:
    branches: '*'

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - name: checkout
        uses: actions/checkout@v7

      - name: install chart version
        run: |
          echo "BUILD_ID=$(date +%d-%m-%Y)" >> "$GITHUB_ENV"
      - name: print dynamic
        run: |
          echo "###############################################################" >> "$GITHUB_STEP_SUMMARY"
          echo "############## buid name: samplejob############################" >> "$GITHUB_STEP_SUMMARY"
          echo "build started day: ${{ env.BUILD_ID }}" >> "$GITHUB_STEP_SUMMARY"
          echo "######################### END ####################################" >> "$GITHUB_STEP_SUMMARY"
          

combine matrix outputs:

name: test-Matrix

on: 
  push:
    branches: '*'

jobs:
  test:
    runs-on: ${{ matrix.os }}
    strategy:
      # max-parallel: 2
      matrix:
        os: [ ubuntu-latest, windows-latest]
        node-version: [16, 18]
        exclude:
          - os: windows-latest
            node-version: 18
          - os: ubuntu-latest
            node-version: 16
        include:
          - os: ubuntu-latest
            node-version: 18
          - os: windows-latest
            node-version: 16
    steps:
      - name: checkout
        uses: actions/checkout@v7

      - name: install nodejs
        uses: actions/setup-node@v7
        with:
          node-version: ${{ matrix.node-version }}

     - name: summary for jobs
       run: |
        echo "result ${{ matrix.node-version }} is passed" >> "$GITHUB_STEP_SUMMARY"

TASK

Refer_files: https://github.com/direct-devops/multi-docker-ci.git

create matrix for docker build and publish

# path: front, backend , api 
- name: Build and push
  uses: docker/build-push-action@v6
  with:
    context: ./${{ matrix.path }}
    file: ./${{ matrix.path }}/Dockerfile
    push: true
    tags: user/${{ matrix.path }}:latest