🔥Creating a REST API Using OpenAPI and AWS CDK (OpenSearch Connection and Custom Domain)

Creating a REST API Using OpenAPI and AWS CDK (OpenSearch Connection and Custom Domain)

May 26, 20231 min read133 words

Overview

I had the opportunity to create a REST API using OpenAPI and AWS CDK, so this is a memo. The following article was very helpful.

OpenAPI × AWS CDK × APIGateway でRest APIを管理する

Zenn

The project created this time is published in the following repository.

github.com

Connecting to OpenSearch

The implementation is done in the following Lambda.

github.com

Environment variables need to be passed to the Lambda, and the following was written in the ts file under lib.

...
const searchFn = new NodejsFunction(this, "search", {
      entry: path.join(__dirname, "../lambda/search.ts"),
      runtime: Runtime.NODEJS_18_X,
      handler: "handler",
      environment: {
        ELASTIC_HOST: process.env.ELASTIC_HOST || "",
        ELASTIC_USERNAME: process.env.ELASTIC_USERNAME || "",
        ELASTIC_PASSWORD: process.env.ELASTIC_PASSWORD || "",
        ELASTIC_INDEX_NAME: process.env.ELASTIC_INDEX_NAME || "",
      },
    });
...

Custom Domain

Please refer to the following file. There may be some errors, but I also tried setting up a custom domain registration and configuring it for API Gateway.

github.com