CI/CD

Software Development Life Cycle (SDLC) [Waterfall vs agile]

• Analysis
• Design
• Implementation
• Quality Assurance
• Deployment
• Support & Maintenance

CI/CD

• Plan - doc / issue
• [git] Code
• [ci] * Build
• [ci] * Test
• [ci] * Release [github release]
• [cd] Deploy [IaC / apps store]
• [cd] Operate [controller / gitops / chatops]
• [cd] Monitor [health check]

Continuous integration

• version control
  • commit message [check]
• build
• automated testing
  • lint
  • unittest
  • integration test
  • end-to-end test

Continuous delivery / deployment

• Deploy
  • Infrastructure as Code (IaC) / gitops
    • ansible (netdb) https://gitlab.com/19gale.ai/netdb-playbook
    • https://k21academy.com/ansible/terraform-vs-ansible/
• Operate
  • k8s controller / operator
  • chatops
  • OTA
  • A/B Testing
• Monitor
  • dashboard / health check
  • gatus

tools

version control

• git

• github pull request (PR) / gitlab merge request (MR)

  • merge commit
  • squash
  • relation with issue tracker

• gitflow https://nvie.com/posts/a-successful-git-branching-model/

  • develop / feature / main / release / hotfixes

CI tools

• git trigger (webhook)
• worker
  • pipeline

ci tools type

job base (jenkins)

• agent (java based) / worker setup
• Groovy script
• https://www.jenkins.io/doc/pipeline/examples/
• plugins

code pipeline base (gitlab ci/circle ci)

• .gitlab-ci.yml
• rules - Use the rules keyword to specify when to run or skip jobs.
• cache / artifacts - Keep information across jobs and stages persistent in a pipeline with cache and artifacts. These keywords are ways to store dependencies and job output, even when using ephemeral runners for each job.

build-job:
  stage: build
  script:
    - echo "Hello, $GITLAB_USER_LOGIN!"

test-job1:
  stage: test
  script:
    - echo "This job tests something"

test-job2:
  stage: test
  script:
    - echo "This job tests something, but takes more time than test-job1."
    - echo "After the echo commands complete, it runs the sleep command for 20 seconds"
    - echo "which simulates a test that runs 20 seconds longer than test-job1"
    - sleep 20

deploy-prod:
  stage: deploy
  script:
    - echo "This job deploys something from the $CI_COMMIT_BRANCH branch."
  environment: production

ci market (github action)

• .github/workflows/xx.yml

name: GitHub Actions Demo
run-name: ${{ github.actor }} is testing out GitHub Actions 🚀
on: [push]
jobs:
  Explore-GitHub-Actions:
    runs-on: ubuntu-latest
    steps:
      - run: echo "🎉 The job was automatically triggered by a ${{ github.event_name }} event."
      - run: echo "🐧 This job is now running on a ${{ runner.os }} server hosted by GitHub!"
      - run: echo "🔎 The name of your branch is ${{ github.ref }} and your repository is ${{ github.repository }}."
      - name: Check out repository code
        uses: actions/checkout@v4
      - run: echo "💡 The ${{ github.repository }} repository has been cloned to the runner."
      - run: echo "🖥️ The workflow is now ready to test your code on the runner."
      - name: List files in the repository
        run: |
          ls ${{ github.workspace }}
      - run: echo "🍏 This job's status is ${{ job.status }}."

• local github action - act https://github.com/nektos/act

k8s and gitops

• tilt https://docs.tilt.dev/controlloop
• prod
  • argocd
  • fluxcd