Description: This template deploys a CI/CD pipeline to deploy to a kubernetes cluster

Parameters:

  Name:
    Type: String
    Default: code-service-demo

  TemplateBucket:
    Type: String
    Default: code-service-demo-public

  BranchName:
    Type: String
    Default: master

  DeploymentName:
    Type: String
    Default: code-service-demo

  ClusterEndpoint:
    Type: String

  LocalBucket:
    Type: String
    Description: This is created from the lambda-copy clouformation and passed to this template

Resources:

  ArtifactBucket:
    Type: AWS::S3::Bucket
    #DeletionPolicy: Retain

  Repository:
    Type: AWS::ECR::Repository
    #DeletionPolicy: Retain

  CWEventTrigger:
    Type: AWS::Events::Rule
    Properties:
      Description: InvokePipeline
      EventPattern:
        source:
          - "aws.codecommit"
        detail-type:
          - "CodeCommit Repository State Change"
        resources:
          - !Ref CodeCommitRepo
        detail:
          referenceType:
            - branch
          referenceName:
            - master
      Targets:
        - Arn: !Sub 'arn:aws:codepipeline:${AWS::Region}:${AWS::AccountId}:${Pipeline}'
          Id: Id345
          RoleArn: !GetAtt CodePipelineEventsRole.Arn

  PermissionForEventsToInvokePipeline:
    Type: AWS::IAM::Policy
    Properties:
      PolicyName: EventsRolePolicy
      Roles:
        - !Ref CodePipelineEventsRole
      PolicyDocument:
        Version: '2012-10-17'
        Statement:
          - Resource: "*"
            Effect: Allow
            Action:
              - codepipeline:*

  CodePipelineEventsRole:
    Type: AWS::IAM::Role
    Properties:
      AssumeRolePolicyDocument:
        Version: '2012-10-17'
        Statement:
          - Effect: Allow
            Principal:
              Service:
                - events.amazonaws.com
            Action:
              - sts:AssumeRole
      Path: /

  CodeCommitRepo:
    Type: AWS::CodeCommit::Repository
    Properties:
      RepositoryName: !Ref Name

  LambdaCodePipelineExecutionPolicy:
    DependsOn:
      - CodePipelineLambdaRole
    Type: AWS::IAM::Policy
    Properties:
      PolicyName: LambdaRolePolicy
      Roles:
        - !Ref 'CodePipelineLambdaRole'
      PolicyDocument:
        Version: '2012-10-17'
        Statement:
          - Effect: Allow
            Action:
              - ssm:Describe*
              - ssm:Get*
            Resource:
              -  '*'
          - Effect: Allow
            Action:
              - kms:Decrypt
            Resource:
              - '*'
          - Effect: Allow
            Action:
              - logs:*
            Resource:
              - arn:aws:logs:*:*:*
          - Effect: Allow
            Action:
              - codepipeline:PutJobSuccessResult
              - codepipeline:PutJobFailureResult
            Resource:
              - '*'
          - Effect: Allow
            Action:
              - s3:GetObject
            Resource:
              - !Sub arn:aws:s3:::${TemplateBucket}/*
              - !Sub arn:aws:s3:::${ArtifactBucket}/*
              - !Sub arn:aws:s3:::${LocalBucket}/*

  CodePipelineLambdaRole:
    Type: AWS::IAM::Role
    Properties:
      AssumeRolePolicyDocument:
        Version: '2012-10-17'
        Statement:
          - Effect: Allow
            Principal:
              Service:
                - lambda.amazonaws.com
            Action:
              - sts:AssumeRole
      Path: /

  LambdaKubernetesDeployment:
    Type: AWS::Lambda::Function
    DependsOn:
      - CodePipelineLambdaRole
      - LambdaCodePipelineExecutionPolicy
    Properties:
      Code:
        S3Bucket: !Ref LocalBucket
        S3Key: Archive.zip
      Role: !GetAtt 'CodePipelineLambdaRole.Arn'
      Description: Update Kubernetes Deployment
      Timeout: 20
      Handler: kube-lambda.lambda_handler
      Runtime: python3.6
      MemorySize: 128

  CodePipelineServiceRole:
    Type: AWS::IAM::Role
    Properties:
      Path: /
      AssumeRolePolicyDocument: |
        {
            "Statement": [{
                "Effect": "Allow",
                "Principal": { "Service": [ "codepipeline.amazonaws.com" ]},
                "Action": [ "sts:AssumeRole" ]
            }]
        }
      Policies:
        - PolicyName: root
          PolicyDocument:
            Version: 2012-10-17
            Statement:
              - Resource:
                  - !Sub arn:aws:s3:::${ArtifactBucket}/*
                  - !Sub arn:aws:s3:::${TemplateBucket}
                  - !Sub arn:aws:s3:::${TemplateBucket}/*
                Effect: Allow
                Action:
                  - s3:PutObject
                  - s3:GetObject
                  - s3:GetObjectVersion
                  - s3:GetBucketVersioning
              - Resource: "*"
                Effect: Allow
                Action:
                  - codebuild:StartBuild
                  - codebuild:BatchGetBuilds
                  - cloudformation:*
                  - iam:PassRole
                  - codecommit:*
              - Resource: "*"
                Effect: Allow
                Action:
                  - lambda:*
  CodeBuildServiceRole:
    Type: AWS::IAM::Role
    Properties:
      Path: /
      AssumeRolePolicyDocument: |
        {
            "Statement": [{
                "Effect": "Allow",
                "Principal": { "Service": [ "codebuild.amazonaws.com" ]},
                "Action": [ "sts:AssumeRole" ]
            }]
        }
      Policies:
        - PolicyName: root
          PolicyDocument:
            Version: 2012-10-17
            Statement:
              - Resource: "*"
                Effect: Allow
                Action:
                  - logs:CreateLogGroup
                  - logs:CreateLogStream
                  - logs:PutLogEvents
                  - ecr:GetAuthorizationToken
              - Resource: !Sub arn:aws:s3:::${ArtifactBucket}/*
                Effect: Allow
                Action:
                  - s3:GetObject
                  - s3:PutObject
                  - s3:GetObjectVersion
              - Resource: !Sub arn:aws:ecr:${AWS::Region}:${AWS::AccountId}:repository/${Repository}
                Effect: Allow
                Action:
                  - ecr:GetDownloadUrlForLayer
                  - ecr:BatchGetImage
                  - ecr:BatchCheckLayerAvailability
                  - ecr:PutImage
                  - ecr:InitiateLayerUpload
                  - ecr:UploadLayerPart
                  - ecr:CompleteLayerUpload

  CodeBuildProject:
    Type: AWS::CodeBuild::Project
    Properties:
      Artifacts:
        Location: !Ref ArtifactBucket
        Type: "S3"
      Source:
        Location: !Sub ${ArtifactBucket}/source.zip
        Type: "S3"
        BuildSpec: |
          version: 0.2
          phases:
            pre_build:
              commands:
                - $(aws ecr get-login)
                - TAG="$(echo $CODEBUILD_RESOLVED_SOURCE_VERSION | head -c 8)"
            build:
              commands:
                - docker build --tag "${REPOSITORY_URI}:${TAG}" .
            post_build:
              commands:
                - docker push "${REPOSITORY_URI}:${TAG}"
                - printf '{"tag":"%s","repository-uri":"%s","template-bucket":"%s","deployment-name":"%s","cluster-endpoint":"%s"}' $TAG $REPOSITORY_URI $TEMPLATE_BUCKET $DEPLOYMENT_NAME $CLUSTER_ENDPOINT > build.json
          artifacts:
            files: build.json
      Environment:
        ComputeType: "BUILD_GENERAL1_SMALL"
        Image: "aws/codebuild/docker:1.12.1"
        Type: "LINUX_CONTAINER"
        EnvironmentVariables:
          - Name: AWS_DEFAULT_REGION
            Value: !Ref AWS::Region
          - Name: REPOSITORY_URI
            Value: !Sub ${AWS::AccountId}.dkr.ecr.${AWS::Region}.amazonaws.com/${Repository}
          - Name: TEMPLATE_BUCKET
            Value: !Ref TemplateBucket
          - Name: DEPLOYMENT_NAME
            Value: !Ref DeploymentName
          - Name: CLUSTER_ENDPOINT
            Value: !Ref ClusterEndpoint
      Name: !Ref AWS::StackName
      ServiceRole: !Ref CodeBuildServiceRole

  Pipeline:
    Type: AWS::CodePipeline::Pipeline
    Properties:
      RoleArn: !GetAtt CodePipelineServiceRole.Arn
      ArtifactStore:
        Type: S3
        Location: !Ref ArtifactBucket
      Stages:
        - Name: Source
          Actions:
            - Name: App
              ActionTypeId:
                Category: Source
                Owner: AWS
                Version: 1
                Provider: CodeCommit
              Configuration:
                RepositoryName: !GetAtt CodeCommitRepo.Name
                BranchName: !Ref BranchName
              OutputArtifacts:
                - Name: App
              RunOrder: 1
        - Name: Build
          Actions:
            - Name: Build
              ActionTypeId:
                Category: Build
                Owner: AWS
                Version: 1
                Provider: CodeBuild
              Configuration:
                ProjectName: !Ref CodeBuildProject
              InputArtifacts:
                - Name: App
              OutputArtifacts:
                - Name: BuildOutput
              RunOrder: 1
        - Name: Deploy
          Actions:
            - Name: UpdateDeployment
              ActionTypeId:
                Category: Invoke
                Owner: AWS
                Version: 1
                Provider: Lambda
              Configuration:
                FunctionName: !Ref LambdaKubernetesDeployment
              InputArtifacts:
                - Name: BuildOutput
              RunOrder: 1

Outputs:

  CodeCommitRepo:
    Value: !GetAtt CodeCommitRepo.CloneUrlHttp
    Description: http url for codecommit repository

  PipelineUrl:
    Value: !Sub https://console.aws.amazon.com/codepipeline/home?region=${AWS::Region}#/view/${Pipeline}