This Serverless-offline plugin emulates AWS λ and S3 queue on your local machine. To do so, it listens S3 bucket events and invokes your handlers.
- Serverless Webpack support.
- S3 configurations: batchsize.
serverless-offline-s3 to your project:
npm install serverless-offline-s3
Then inside your project's
serverless.yml file, add following entry to the plugins section before
serverless-offline (and after
serverless-webpack if presents):
plugins:- serverless-webpack- serverless-offline-s3- serverless-offline
How it works?
To be able to emulate AWS S3 Bucket on local machine there should be some bucket system actually running. One of the existing implementations suitable for the task is Minio.
Minio is a High Performance Object Storage released under Apache License v2.0. It is API compatible with Amazon S3 cloud storage service. Use MinIO to build high performance infrastructure for machine learning, analytics and application data workloads. See example
s3 service setup.
We also need to setup actual buckets in Minio server, we can use AWS cli tools for that. In example, we spawn-up another container with
aws-cli pre-installed and run initialization script, against Minio server in separate container.
Once Minio is running and initialized, we can proceed with the configuration of the plugin.
Note that starting from version v3.1 of the plugin.
The configuration of function of the plugin follows the serverless documentation.
functions:myS3Handler:handler: handler.computeevents:- s3:bucket: myBucketevent: s3:ObjectCreated:Put
The configuration of
aws.S3's client of the plugin is done by defining a
custom: serverless-offline-s3 object in your
serverless.yml with your specific configuration.
Minio with the following configuration:
custom:serverless-offline-s3:endpoint:region: eu-west-1accessKey: minioadminsecretKey: minioadmin