thundra-lambda-warmup-cloudformation-template.yaml

AWSTemplateFormatVersion: "2010-09-09"
Description: "Thundra Lambda Warmup"
Parameters:
  FunctionNameParameter:
    Type: String
    Default: "thundra-lambda-warmup"
    Description: "Name of the 'thundra-lambda-warmup' Lambda function"
  TimeoutParameter:
    Type: Number
    Default: 300
    MinValue: 1
    MaxValue: 300
    Description: "'thundra-lambda-warmup' Lambda function timeout value in seconds."
  MemorySizeParameter:
    Type: Number
    Default: 512
    AllowedValues:
      - 128
      - 192
      - 256
      - 320
      - 384
      - 448
      - 512
      - 576
      - 640
      - 704
      - 768
      - 832
      - 896
      - 960
      - 1024
      - 1088
      - 1152
      - 1216
      - 1280
      - 1344
      - 1408
      - 1472
      - 1536
      - 1600
      - 1664
      - 1728
      - 1792
      - 1856
      - 1920
      - 1984
      - 2048
      - 2112
      - 2176
      - 2240
      - 2304
      - 2368
      - 2432
      - 2496
      - 2560
      - 2624
      - 2688
      - 2752
      - 2816
      - 2880
      - 2944
      - 3008
    Description: "'thundra-lambda-warmup' Lambda function memory size."
Resources:
  ThundraLambdaWarmupExecutionRole:
    Type: "AWS::IAM::Role"
    Properties:
      RoleName: !Sub "${FunctionNameParameter}-${AWS::Region}-execution-role"
      AssumeRolePolicyDocument:
        Version: "2012-10-17"
        Statement:
          - Effect: "Allow"
            Principal:
              Service: "lambda.amazonaws.com"
            Action: "sts:AssumeRole"
      Policies:
        - PolicyName: !Sub "${FunctionNameParameter}-${AWS::Region}-role"
          PolicyDocument:
            Version: "2012-10-17"
            Statement:
              - Effect: "Allow"
                Action: "logs:CreateLogStream"
                Resource: !Sub "arn:aws:logs:${AWS::Region}:${AWS::AccountId}:log-group:/aws/lambda/${FunctionNameParameter}:*"
              - Effect: "Allow"
                Action: "logs:PutLogEvents"
                Resource: !Sub "arn:aws:logs:${AWS::Region}:${AWS::AccountId}:log-group:/aws/lambda/${FunctionNameParameter}:*:*"
              - Effect: "Allow"
                Action: "lambda:ListFunctions"
                Resource: "*"
              - Effect: "Allow"
                Action: [ "lambda:InvokeFunction", "lambda:ListAliases" ]
                Resource: !Sub "arn:aws:lambda:${AWS::Region}:${AWS::AccountId}:function:*"
  ThundraLambdaWarmupLogGroup:
    Type: "AWS::Logs::LogGroup"
    Properties:
       LogGroupName: !Sub "/aws/lambda/${FunctionNameParameter}"
  ThundraLambdaWarmupFunction:
    Type: "AWS::Lambda::Function"
    Properties:
      FunctionName:
        Ref: FunctionNameParameter
      Handler: "io.thundra.lambda.warmup.WarmupHandler"
      Description: "Thundra Lambda Warmup"
      Role: !GetAtt [ ThundraLambdaWarmupExecutionRole, Arn ]
      Code:
        S3Bucket: !Sub "thundra-dist-${AWS::Region}"
        S3Key: "thundra-lambda-warmup.jar"
      Runtime: java8.al2
      Timeout:
        Ref: TimeoutParameter
      MemorySize:
        Ref: MemorySizeParameter
    DependsOn: [ThundraLambdaWarmupExecutionRole, ThundraLambdaWarmupLogGroup]
  ThundraLambdaWarmupSchedule:
    Type: "AWS::Events::Rule"
    Properties:
      ScheduleExpression: "rate(5 minutes)"
      State: "ENABLED"
      Name: !Sub "${FunctionNameParameter}-schedule"
      Targets:
        -
          Arn:
            Fn::GetAtt:
              - "ThundraLambdaWarmupFunction"
              - "Arn"
          Id: !Sub "${FunctionNameParameter}-schedule"
  ThundraLambdaWarmupSchedulePermission:
    Type: "AWS::Lambda::Permission"
    Properties:
      FunctionName:
        Fn::GetAtt:
          - "ThundraLambdaWarmupFunction"
          - "Arn"
      Action: "lambda:InvokeFunction"
      Principal: "events.amazonaws.com"
      SourceArn:
        Fn::GetAtt:
          - "ThundraLambdaWarmupSchedule"
          - "Arn"