serverless.yml

service: ${env:CONTEXT}

# enables sqs as DLQ for lambdas
plugins:
  - serverless-plugin-lambda-dead-letter
  - serverless-plugin-dynamodb-autoscaling

custom:
    context: ${env:CONTEXT}
    service: ${env:SERVICE}
    environment: ${env:ENVIRONMENT}
    aws_accountid: ${env:AWS_ACCOUNTID}
    deployment_bucket: ${env:SERVERLESS_DEPLOYMENT_BUCKET}
    lambda_name: ${env:CONTEXT}-${env:SERVICE}-${env:ENVIRONMENT}
    DynamoDBTableName: ${env:CONTEXT}-mybigddbtable-${env:ENVIRONMENT}
    # delete next section, if DynamoDB autoscaling is not required
    dynamodbAutoscaling:
      iamRoleArn: arn:aws:iam::${self:custom.aws_accountid}:role/devops/${self:custom.context}-${self:custom.environment}-infrastructure
      tablesConfig:
        DynamoDbTable1:
          minCapacity: 2
          maxCapacity: 5

provider:
  name: aws
  runtime: python3.6
  region: eu-west-1
  stage: ${opt:stage, 'staging'}
  deploymentBucket:
    name: ${self:custom.deployment_bucket}
    serverSideEncryption: AES256
  tags:
    context: ${self:custom.context}
    service: ${self:custom.service}    
    stack: ${self:custom.environment}
    role: arn:aws:iam::${self:custom.aws_accountid}:role/context/${self:custom.context}-${self:custom.environment}      

functions:
  lambdafunction1:
    name: ${self:custom.lambda_name}
    handler: lambda.handler
    description: <add description here>
    memorySize: 128
    timeout: 10
    reservedConcurrency: 5
    deadLetter:
      sqs:  ${self:custom.context}-${self:custom.service}deadletter-${self:custom.environment}
    environment:
      varA: varA
    events:
      - schedule:
          name: ${self:custom.lambda_name}-schedule
          description: ${self:custom.lambda_name} runs every 5 minutes
          rate: rate(5 minutes)


resources:
  Resources:
    DynamoDbTable1:
      Type: AWS::DynamoDB::Table
      Properties:
        TableName: ${self:custom.DynamoDBTableName}
        AttributeDefinitions:
          - AttributeName: userId
            AttributeType: S
        KeySchema:
          - AttributeName: userId
            KeyType: HASH
        ProvisionedThroughput:
          ReadCapacityUnits: 1
          WriteCapacityUnits: 1
        Tags:
          - Key: context
            Value: ${self:custom.context}
          - Key: service
            Value: ${self:custom.service}
          - Key: stack
            Value: ${self:custom.environment}