rgalba/fibonacci-api

# CI/CD Pipeline

Full AWS based CI/CD pipeline.

## Stack
- AWS CodeCommit
- AWS CodeBuild
- AWS CodeDeploy
- AWS CodePipeline
- AWS ECR
- AWS ECS

## Steps

1. AWS CodeCommit replica from Github
2. Build java app (gradle via AWS CodeBuild)
3. Run tests via CodeBuild
4. Build docker image via CodeBuild?
5. Deploy docker image to AWS ECR (Fargate)
6. Create CodePipeline to manage all these tasks

## Step 1: Create AWS CodeCommit repository

```shell script
$ aws codecommit create-repository --repository-name FibonacciApp --repository-description "Simple Fibonacci functions as API"
{
    "repositoryMetadata": {
        "accountId": "ommited",
        "repositoryId": "3ca383d6-31cd-4391-8b76-58f3af3c293a",
        "repositoryName": "FibonacciApp",
        "repositoryDescription": "Simple Fibonacci functions as API",
        "lastModifiedDate": "2020-09-07T14:36:54.628000-03:00",
        "creationDate": "2020-09-07T14:36:54.628000-03:00",
        "cloneUrlHttp": "https://git-codecommit.us-east-1.amazonaws.com/v1/repos/FibonacciApp",
        "cloneUrlSsh": "ssh://git-codecommit.us-east-1.amazonaws.com/v1/repos/FibonacciApp",
        "Arn": "ommited"
    }
}
```

To add this repo as a new Git remote:

```shell script
git remote add codecommit https://git-codecommit.us-east-1.amazonaws.com/v1/repos/FibonacciApp
```

Setup SSH key to access CodeCommit. [Doc](https://docs.aws.amazon.com/codecommit/latest/userguide/setting-up-ssh-unixes.html#setting-up-ssh-unixes-keys)

Push to CodeCommit repo:

```shell script
git push -u codecommit master
```

## Step 2: AWS CodeBuild setup

All the commands and related settings are placed in `buildspec.yml` file.

Create build project called `Fibonacci-Production` using following configuration:
  - Source
    - provider: CodeCommit
    - Primary repository: FibonacciApp
    - Source version: `production` branch
  - Environment:
    image: amazonlinux2 - standard 3
    type: Linux
    service role: new service role `codebuild-FibonacciApp-Dev-service-role`
    compute: 3GB memory, 2 vCPU
    timeout: 5 minutes
    queued timeout: 8h
  - Buildspec: use the `buildspec.yml` in the source code root dir
  - Artifacts
    - upload location: S3 (create a bucket called `fibonacciapp-cicd-artifacts` if not exists)
    - Namespace type: Build ID
    - packaging: None
    - encryption: KMS
  - Logs: enabled to CloudWatch logs

Create a CloudWatch Event to trigger build on every commit for the project repository. Event pattern:

```
{
  "source": [
    "aws.codecommit"
  ],
  "detail-type": [
    "CodeCommit Repository State Change"
  ],
  "resources": [
    "arn:aws:codecommit:us-east-1:omitted:FibonacciApp"
  ]
}
```