cdk-pipelines-realworld-example

This repository use CDK Pipelines to implement CI/CD for CDK Application.

Feature

• Directory structure design

Split relevent AWS Service into same directory, such as Network, Ecs etc... See below:

project
│   README.md
│   config.yml    
│
└───src
│   │  main.ts 
│   │
│   └───network
│       │   cdk-pipelines.ts
│       │   network-stage.ts
│       │   network-stack.ts
│       │   ...
│       └─── configs
│            │ dev.yml
│            │ prod.yml     
│   └───ecs
│       │   cdk-pipelines.ts
│       │   ecs-stage.ts
│       │   ecs-stack.ts
│       │   ...
│       └─── configs
│            │ dev.yml
│            │ prod.yml  

• Pre-validation for stack

When CDK Pipelines cross different account or region for deployment, validate CloudFormation template first which is good way. The benefit is risk reduction that it ensure any modification which be reviewd. The code snippet like blow:

const ecsWave = pipeline.addWave('Ecs');

ecsWave.addStage(
  new EcsStage(this, 'Dev', {
    env: { account: props.devAccount, region: 'ap-northeast-1' },
    stageEnv: 'dev',
  }),
  {
    pre: [new pipelines.ShellStep('Validate dev CloudFormation Synth', {
      commands: [
        'yarn install --frozen-lockfile',
        './node_modules/.bin/jest --passWithNoTests test/ecs-dev.test.ts',
      ],
    })],
  },
);

ecsWave.addStage(
  new EcsStage(this, 'Production', {
    env: { account: props.prodAccount, region: 'ap-northeast-1' },
    stageEnv: 'prod',
  }),
  {
    pre: [new pipelines.ShellStep('Validate staging CloudFormation Synth', {
      commands: [
        'yarn install --frozen-lockfile',
        './node_modules/.bin/jest --passWithNoTests test/ecs-prod.test.ts',
      ],
    })],
  },
);

• Fixed CDK version

It can use cliVersion prop to specify cdk version. Reference here

Local development and test deployment

When modify code of stack, it's good way for using cdk diff to review what the modification. The command like below:

Network Dev

cdk synth -q && cdk diff -a cdk.out/assembly-TestNetwork-Dev

Network Production

cdk synth -q && cdk diff -a cdk.out/assembly-TestNetwork-Production 

ECS Dev

cdk synth -q && cdk diff -a cdk.out/assembly-TestEcs-Dev

Take test deployment further on local environment

cdk synth -q && cdk deploy -a cdk.out/assembly-TestEcs-Dev –no-rollback

The –no-rollback parameter is useful for test deployment for CloudFormation