カスタムドメインを利用したAPI Gatewayとlambda環境構成のサンプル

custom-domain-api-lambda-sample-serverless.yml

service: 
    name: ${self:custom.serviceName}
  
provider:
    name: aws
    apiName: ${self:custom.serviceName}-API
    endpointType: REGIONAL
    apiKeys:
      - ${self:custom.serviceName}
    runtime: python3.7
    memorySize: 128
    timeout: 3
    logRetentionInDays: 30
    stage: ${env:STAGE, self:custom.defaultStage}
    region: ${env:AWS_DEFAULT_REGION, self:custom.defaultRegion}

functions:
    sample:
      handler: src/lambda_function.lambda_handler
      name: ${self:custom.serviceName}
      description: Managed by Serverless Framework
      events:
        - http:
            path: /calcAmount
            method: get
            private: true
            integration: lambda-proxy
                
package:
  exclude:
    - '**'
  include:
    - 'src/**'

plugins:
  - serverless-python-requirements
  - serverless-pseudo-parameters
  - serverless-domain-manager

custom:
    serviceName: sample
    defaultStage: dev
    defaultRegion: ap-northeast-1
    domainName:
      dev: <development domain name>
      prod: <production domain name>
    certificateArn:
      dev: arn:aws:acm:ap-northeast-1:<development acount id>:certificate/***************************
      prod: arn:aws:acm:ap-northeast-1:<production acount id>:certificate/***************************
    # serverless-python-requirements plugin
    pythonRequirements:
      usePipenv: true
    # serverless-domain-manager plugin
    customDomain:
      domainName: ${self:custom.domainName.${self:provider.stage}}
      stage: ${self:provider.stage}
      basePath: ''
      createRoute53Record: true
      certificateArn: ${self:custom.certificateArn.${self:provider.stage}}
      endpointType: 'regional'
      securityPolicy: tls_1_2
      apiType: rest