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Labs

Continuous Integration & Continuous Delivery (Deployment) (CI/CD)

Before starting

It is required to have an example application with automated tests. It is suggested to use the application on NodeJS created in the module 4 "Continuous testing".

  1. To use the example application, copy the modules/4-continuous-testing/assets/userapi folder to any place on your computer.

  2. Initialize a new Git repository containing all the source files of the example project and push it to a new remote repository on GitHub.

1. CI part - using Travis CI

  1. Go to travis-ci.com and sing up with GitHub account

  2. Sync GitHub account with Travis CI account

  3. Create .travis.yml configuration file under the root of your project repo:

language: node_js
node_js:
- '12'
- '14'
services:
- redis-server
script:
- echo 'Starting'
- npm install
- echo 'Testing'
- npm test

And push it to the remote master.

  1. Practice a regular workflow of software development life cycle. Create a pull request to master branch:
  • create a new branch and publish it to your remote GitHub repository
  • make any change in you source code, commit and push it
  • make a Pull Request on GitHub
  • wait for Travis CI to test it (observe the process on Travis CI)
  • review the commit and Merge this Pull Request into master branch
  1. Check the Travis CI build log.

2. CD part - using Heroku

  1. Create an account on Heroku

  2. Create an app on Heroku and configure it

Under the "Deploy tab":

  • sync the app with the GitHub repository
  • enable option "Automatic deploys / Wait for CI to pass before deploy"
  1. Add Redis service to Heroku deployment - https://elements.heroku.com/addons/heroku-redis

Note! Redis service on Heroku is free, but it requires adding credit card information. Considering this limitation we will not run Redis on Heroku, and the application will be partially not working (it will print the "Hello world!" message on the home page, but the user API will not work). However, it will be enough to experience our CI/CD pipeline.

  1. Configure .travis.yml with Heroku

Install CLIs:

Configuration:

Link to configuration instruction - Heroku Deployment

You can use this command:

travis setup heroku

After that in the .travis.yml will be appended something like:

deploy:
  provider: heroku
  api_key:
    secure: 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
  app: ece-userapi
  on:
    repo: sergkudinov/ece-userapi

And push it to the remote master.

Note!

If you have an error like "Message: Invalid credentials provided." in your Travis CI log, read this.

  1. Create a pull request to the master branch to test your CI/CD pipeline.

  2. Test your public domain on Heroku.