dherault/serverless-offline

Support custom container images

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#1324 opened on Jan 30, 2022

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 (13 comments) (13 reactions) (0 assignees)JavaScript (5,072 stars) (792 forks)batch import
featurehelp wanted

Description

Feature Request

AWS Lambda and Serverless both now support Container images. https://www.serverless.com/blog/container-support-for-lambda https://docs.aws.amazon.com/lambda/latest/dg/images-create.html

This greatly improves testability and stability, since the exact image that is created and tested can be used at runtime.

It seems like it would require a small change to at least still run the python code.

Sample Code

  • file: serverless.yml

Current handler location string:

functions:
  api:
    handler: path/to/handler.api  # <------

Handler location string with custom containers:

functions:
  api:
    image:
      name: api
      command:
        - path/to/handler.api # <------

Expected behavior/code

Just hope for it to run the code as it does today, getting its location from either the previous handler key OR the new image.command array.

Contributor guide

Tech stack
javascriptnodejsawsdocker
Domain
backendtestingcloud
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
DockerAWS Lambdaserverless frameworkYAML configuration
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
35
Research direction
Investigate how serverless offline currently resolves the handler from the serverless.yml configuration. Look for the code that parses the functions section and extracts the handler string. Consider adding support for the `image` object and its `command` array as an alternative handler source. Check if there are any existing discussions or attempted implementations in the linked issues (e.g., #1324). Also review the serverless framework's documentation on container support to understand the expected configuration format.