LocalStackメモ

docker-compose.yml

version: "3.8"

services:
  localstack:
    image: localstack/localstack
    ports:
      - "127.0.0.1:4566:4566"            # LocalStack Gateway
      - "127.0.0.1:4510-4559:4510-4559"  # external services port range
    environment:
      - DEBUG=${DEBUG-}
      - PERSISTENCE=${PERSISTENCE-}
      - LAMBDA_EXECUTOR=${LAMBDA_EXECUTOR-}
      - DOCKER_HOST=unix:///var/run/docker.sock
    volumes:
      - "${LOCALSTACK_VOLUME_DIR:-./volume}:/var/lib/localstack"
      - "/var/run/docker.sock:/var/run/docker.sock"

kentama

とりあえず起動確認

aws --endpoint-url=http://localhost:4566 lambda list-functions
{
    "Functions": []
}

kentama

AWSのドキュメントに従って関数を作る

index.js

exports.handler = async function(event, context) {
  console.log("ENVIRONMENT VARIABLES\n" + JSON.stringify(process.env, null, 2))
  console.log("EVENT\n" + JSON.stringify(event, null, 2))
  return context.logStreamName
}

デプロイの準備

zip function.zip index.js

kentama

Lambda関数を作る

 aws  --endpoint-url=http://localhost:4566 lambda create-function --function-name my-function \
--zip-file fileb://function.zip --handler index.handler --runtime nodejs16.x \
--role cool-stacklifter

Lambda関数ができてる

 aws --endpoint-url=http://localhost:4566 lambda list-functions
{
    "Functions": [
        {
            "FunctionName": "my-function",
            "FunctionArn": "arn:aws:lambda:ap-northeast-1:000000000000:function:my-function",
            "Runtime": "nodejs16.x",
            "Role": "cool-stacklifter",
            "Handler": "index.handler",
            "CodeSize": 322,
            "Description": "",
            "Timeout": 3,
            "LastModified": "2022-11-27T02:22:57.902+0000",
            "CodeSha256": "+i8gpEvu/VXkhGnmhrSSMKxanSSdOxnBo4Bj8udS5l0=",
            "Version": "$LATEST",
            "VpcConfig": {},
            "TracingConfig": {
                "Mode": "PassThrough"
            },
            "RevisionId": "2000206c-adb0-45cc-841f-1e846d97effd",
            "State": "Active",
            "LastUpdateStatus": "Successful",
            "PackageType": "Zip",
            "Architectures": [
                "x86_64"
            ]
        }
    ]
}

kentama

Lambda関数の実行

aws  --endpoint-url=http://localhost:4566 lambda invoke --function-name my-function out --log-type Tail