add dns-template

Author: horike37

README.md

@@ -101,3 +101,12 @@ $ aws cloudformation create-stack --stack-name <スタック名> --template-url
 ```bash
 $ aws cloudformation update-stack --stack-name <スタック名> --template-url https://s3-ap-northeast-1.amazonaws.com/<バケット名>/<tag名>/cloudformation-template-update-stack.json --capabilities '["CAPABILITY_IAM","CAPABILITY_NAMED_IAM"]'
 ```
+
+
+## ドメインの割当
+
+APIをデプロイ後にdns-templateのスタックをデプロイすることでドメインが割り当てられます
+
+```
+aws cloudformation deploy --stack-name <スタック名> --template /path/to/dns-template.yml --capabilities '["CAPABILITY_AUTO_EXPAND"]' --parameter-overrides Doamin=<ネイキッドドメイン> SubDomain=<サブドメイン> HostedZoneId=<Route53のゾーンID> RestApiId=<割り当てたいAPIのID> CertificateArn=<ACMで発行した証明書のARN>
+```

dns-template.yml

@@ -0,0 +1,53 @@
+AWSTemplateFormatVersion: '2010-09-09'
+Description: OAuth API Domain
+
+Parameters:
+  Doamin:
+    Type: String
+    Default: alis.to
+  SubDomain:
+    Type: String
+    Default: oauth2
+  HostedZoneId:
+    Type: String
+  RestApiId:
+    Type: String
+  CertificateArn:
+    Type: String
+
+Resources:
+  RestApiRecordSet:
+    Type: AWS::Route53::RecordSet
+    Properties:
+      HostedZoneId: !Ref HostedZoneId
+      Name: !Sub
+      - ${SubDomain}.${Domain}
+      - SubDomain: !Ref SubDomain
+        Domain: !Ref Doamin
+      TTL: 60
+      Type: CNAME
+      ResourceRecords:
+      - !GetAtt RestApiDomain.RegionalDomainName
+  RestApiDomain:
+    Type: AWS::ApiGateway::DomainName
+    Properties:
+      DomainName: !Sub
+      - ${SubDomain}.${Domain}
+      - SubDomain: !Ref SubDomain
+        Domain: !Ref Doamin
+      EndpointConfiguration:
+        Types:
+        - REGIONAL
+      RegionalCertificateArn: !Ref CertificateArn
+  ApiBasePathMapping:
+    Type: AWS::ApiGateway::BasePathMapping
+    Properties:
+      DomainName: !Sub
+      - ${SubDomain}.${Domain}
+      - SubDomain: !Ref SubDomain
+        Domain: !Ref Doamin
+      RestApiId: !Ref RestApiId
+      Stage: production
+    DependsOn:
+      - RestApiRecordSet
+      - RestApiDomain