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Building System & CI/CD

The lifecycle of a piece of code

DevOps/Compiling/Integ Test/CI/CD/Pipeline/In-place vs. Blue-Green/etc.

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Deployment of the first web application

App:�Write code�Copy Code to a http server�Restart the server

DB:�Update Schema/Table

Limitation?

Downtime, Unstable, Error-prone, etc

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Why CI/CD

Rapid software changes

Maintain system stability & security

Archive above with 0 tolerance for outages

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What are CI, CD

Continuous Integration�Regularly merge code & auto build + testing → good quality and ready to release

Continuous Delivery�After CI, deploy code changes to test/prod env; auto or half-auto

Continuous Deployment�Revisions are deployed to prod env. automatically.

Changes are ready for prod. VS. Changes are deployed into prod automatically.

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Industry standard - when it comes to scale

Code Repo

Auto merge & build

Test Env

Prod Env1

Stage

Every company has its own way of DevOps life cycle.

Dev & unit test

Goal:

  • Automate the Software Release Process
  • Improve Developer Productivity
  • Improve Code Quality
  • Deliver Updates Faster

Roll Back:�Changes can be vetted at any stage, followed by Roll back

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Roll Back

Roll Back policy is different from stage to stage.

Criteria for Roll-back� Monitoring Alarm� Monitoring Metrics� Run scripts

Action� Redeploy last successful build� Cut a ticket

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Dev & Unit test

IDEs� Homemade & public

Dependency Management

Java - Ant, Maven, Gradle; C/C++ - Make; JS - Grunt; Rake, Webpack

Building

CodeGen, Compiler, Interpreter � Output: Binary, image, doc, etc

Local Unit Test

Open Question: �- Does your org. have its own IDE/Plug-in?�- Does your org. have its own build system? What are the key components?

Code Repo

Auto merge & build

Test Env

Prod Env1

Stage

Dev & unit test

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CI: Code Repo & Auto merge/build

  • SCM: SVN, Git, CodeCommit
  • Unit Test, Static Scan, Style Check,pre-submit
  • Trigger CI tools like Jenkins to build the code, pass SHA
  • Output Artifacts, binary, images, doc:

Code Repo

Auto merge & build

Test Env

Prod Env1

Stage

Dev & unit test

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Continuous Delivery

  • Integration Test/API Test/Load Test
  • Function Test
  • Baking/UAT�Tools: selenium,
  • Open Question:�Key functions of a test Tool?�How to handle DB？

Other:�IaC�Serverless/Lambda

Code Repo

Auto merge & build

Test Env

Prod Env1

Stage

Dev & unit test

https://www.xenonstack.com/insights/what-is-integration-testing�https://theqalead.com/tools/automation-testing-tools/

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CI/CD testing pyramid

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Deployment to Production

  • In-place & Blue-Green�
  • Deploy with confidence
  • Waves - small regions vs. big regions
  • Containers?

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Code Repo

Auto merge & build

Test Env

Prod Env1

Stage

Dev & unit test

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Dynamic/centralized Configuration

Implementation

Frameworks:

Key Functions:

Status

A/B Testing:

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Code deprecation

Function

API

Service

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Other streamlines

AI/ML?

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Resources

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