CI Continuous integration

One repo or multiple repos

• One repo better https://nrwl.io/nx/why-a-workspace

• One or multiple in the context of micro-services https://medium.com/@somakdas/code-repository-for-micro-services-mono-repository-or-multiple-repositories-d9ad6a8f6e0e

• Mono repository for micro service http://blog.shippable.com/our-journey-to-microservices-and-a-mono-repository

What is Continuous integration / Continuous deployement

Continuous Integration (CI) : Push changes on developement server quickly and automatically so new changes can be tested earlier

Continous Deployement (CD) : Push changes on production server quickly and automatically so new changes can benefits to users earlier

All the infos here https://www.thoughtworks.com/continuous-integration

The most important being :

The practice

• Maintain a single source repository

• Automate the build

• Make your build self-testing

• Every commit should build on an integration machine

• Keep the build fast

• Test in a clone of the production environment

• Make it easy for anyone to get the latest executable version

• Everyone can see what’s happening

• Automate deployment

How to do it

• Developers check out code into their private workspaces

• When done, commit the changes to the repository

• The CI server monitors the repository and checks out changes when they occur

• The CI server builds the system and runs unit and integration tests

• The CI server releases deployable artefacts for testing

• The CI server assigns a build label to the version of the code it just built

• The CI server informs the team of the successful build

• If the build or tests fail, the CI server alerts the team

• The team fixes the issue at the earliest opportunity

• Continue to continually integrate and test throughout the project

Team responsibilities

• Check in frequently

• Don’t check in broken code

• Don’t check in untested code

• Don’t check in when the build is broken

• Don’t go home after checking in until the system builds

Which CI server to choose

A comparison of continuous integration tools

https://www.code-maze.com/top-8-continuous-integration-tools/

• Amazon AWS tutorial for contiuous integration

  https://docs.aws.amazon.com/codepipeline/latest/userguide/tutorials.html