serverless-webpack 5.5.0 attempts to run Webpack on container images which are not JavaScript

[cnorthwood]

This is a Bug Report

Description

For bug reports:

• What went wrong?

serverless-webpack is stopping me from deploying lambda containers as part of my service that are not

• What did you expect should have happened?

it should not have touched them as they're not relevant to webpack

• What was the config you used?

N/A

I assume this is related to https://github.com/serverless-heaven/serverless-webpack/pull/723, which I can see the sense in - however, I can't see a way to say "this isn't a container image that Webpack cares about" and hence ignore that lambda in the service definition. Ideally there'd be an option to opt in/out of either Webpack's involvement in particular functions, or container functions as a whole as not all container functions are guaranteed to be part of the service.

Additional Data

$ /Users/chris/Code/report-support/node_modules/.bin/serverless deploy -v --stage dev
Serverless: Using configuration:
{
  "webpackConfig": "api/webpack.config.js",
  "includeModules": {
    "forceInclude": [
      "pg"
    ]
  },
  "packager": "yarn",
  "keepOutputDirectory": true,
  "packagerOptions": {},
  "concurrency": 12
}

 Serverless Error ----------------------------------------

  No matching handler found for 'apollo' in 'XXX'. Check your service definition.

  Get Support --------------------------------------------
     Docs:          docs.serverless.com
     Bugs:          github.com/serverless/serverless/issues
     Issues:        forum.serverless.com

  Your Environment Information ---------------------------
     Operating System:          darwin
     Node Version:              14.16.1
     Framework Version:         2.41.1 (local)
     Plugin Version:            4.6.0
     SDK Version:               4.2.2
     Components Version:        3.9.2

[j0k3r]

For what I understand you are mixing both container and regular JavaScript function in the same serverless config?
Any chance to share a short config to reproduce?

[cnorthwood]

service: report-support

provider:
  name: aws
  region: eu-west-2
  runtime: nodejs12.x
  stage: ${opt:stage, 'dev'}
  versionFunctions: false

plugins:
  - serverless-webpack

functions:
  server:
    image:
      uri: ${env:DOCKER_IMAGE}
      entryPoint:
        - /app/node_modules/.bin/aws-lambda-ric
      command:
        - apollo.lambda
    role: LambdaGraphQlRole

  migrate:
    handler: db/migrate.up
    role: LambdaGraphQlRole

  rollback:
    handler: db/migrate.back
    role: LambdaGraphQlRole

custom:
  webpack:
    webpackConfig: api/webpack.config.js
    includeModules:
      forceInclude:
        - pg
    packager: yarn
    keepOutputDirectory: true

[j0k3r]

Could you test again using the 5.5.1? Thanks 🙏

[cnorthwood]

Sadly not:

  Serverless Error ----------------------------------------

  No matching handler found for 'apollo' in '/builds/culture-shift/report-support'. Check your service definition.

[j0k3r]

From where the apollo coming from? I can't see a reference to it in the serverless.yml you shared.

[cnorthwood]

in the definition of the server function, I would assume it's looking at the command of the lambda

[j0k3r]

Could you explain me what apollo.lambda is referencing to?

According to what was done here https://github.com/serverless-heaven/serverless-webpack/pull/723 and how it is supposed to work here, there should be a apollo.js file which export a lambda function. Isn't?

[cnorthwood]

apollo.lambda is the command passed to the container image. The problem seems to be that it's incorrectly being interpreted as a JavaScript function, so it's looking for a function called lambda inside an apollo.js file - but that's not the case. It's just the command passed to the container. The problem appears to be serverless-webpack is trying to build it, but it's not a container image that Serverless is building itself (because the image has a uri field, it refers to an externally built image, not one built by Serverless). Ideally serverless-webpack shouldn't be trying to get involved in container images that the serverless framework isn't building

[j0k3r]

@cnorthwood could you check my attached PR? I've skipped off function when image.uri is defined.

[cnorthwood]

Unfortunately that doesn't seem to have changed anything

[j0k3r]

You still have the same error when using my PR?
I've tried locally using a simple function and it worked, with my PR I don't have the error anymore.

functions:
  server:
    image:
      uri: http://localhost
      command:
        - apollo.lambda

[cnorthwood]

with apologies, it looks like I failed to change to the right branch - yes, that appears to be correct now

[j0k3r]

Good news!