How to CI & CD

Elixir Edition

Continuous Integration, Why Even?

running mix test on a server

Is this Continuous Integration?

Benefits

Faster Iteration
Better Communication
Prevents Som Defects
Reduces Work
Automated Boring Stuff

A Simple CI/CD Workflow

Great With Github

Text

Don't be too dogmatic; think of the children

Great Tools For CI/CD In Our Ecosystem

ExUnit (with or without coverage)
Dialyzer
Credo
Sobelow
The Formatter
ExDoc?
Distillery

Workflow Configuration

Describing the workflow should be separated away from implementing the steps. CirceleCI does a good job here.

workflows:
  version: 2
  continuous_integration:
    jobs:
      - build
      - test:
          requires:
            - build
      - check_formatted:
          requires:
            - build
      - credo:
          requires:
            - build
      - dialyzer:
          requires:
            - build
      - static_security_checks:
          requires:
            - build
      - hold:
          type: approval
          requires:
            - build
            - test
            - credo
            - dialyzer
            - check_formatted
            - static_security_checks
          filters:
            branches:
              only: master
      - deploy:
          requires:
            - hold
          filters:
            branches:
              only: master

Other Considerations

Git(hub) Workflow
Error Reporting
Alerts
Monitoring
Logging

From CI to CD

Being able to deploy without a manual step is the central concern of CD. Naturally it follows that you will do this after establishing a CI process and a the final step of that process.

Quick & Dirty CD on CircleCI

Keep it simple
Automat what you already have
Focus on tool you already understand

It's Ok To Have a Go Button

What About Hot Upgrades?

I don't Know

Quick Demo

Questions?

Contact

email: chase.gilliam@gmail.com

twitter: @ChaseGilliam