Create AWS Lamdba Layer

Suppose I want to upload MaxMind GeoIp city database to AWS, and make it as Lambda layer.

  1. Create a zip file with below structure

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    $ unzip -l GeoIP2-City-mmdb.zip
    Archive:  GeoIP2-City-mmdb.zip
      Length      Date    Time    Name
    ---------  ---------- -----   ----
            0  03-12-2021 11:11   lib/
    120825986  03-10-2021 04:24   lib/GeoIP2-City.mmdb

  2. Upload the zip file to a s3 bucket

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    aws s3 cp GeoIP2-City-mmdb.zip s3://lambda-layer-ap-east-1/GeoIP2-City-mmdb.zip --profile prod-calviny --region ap-east-1

  3. Use Cloudformation (or AWS Console) to deploy the layer

    1. Prepare Cloudformation template
      template-layer.yaml
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      AWSTemplateFormatVersion: '2010-09-09'
      Transform: AWS::Serverless-2016-10-31
      Description: API SAM template
      Resources:
      GeoIPDBLayer:
          Type: AWS::Serverless::LayerVersion
          Properties:
              LayerName: geo-ip-city-db-layer
              Description: Dependencies for MaxMind GEO IP DB
              ContentUri: s3://lambda-layer-ap-east-1/GeoIP2-City-mmdb.zip
              CompatibleRuntimes:
                  - nodejs14.x
              LicenseInfo: MIT
              RetentionPolicy: Retain
    2. Deploy the layer to AWS
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      aws cloudformation deploy --template-file template-layer.yaml --stack-name lambda-layer-stack --profile prod-calviny --region ap-east-1
2021-08-17
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