How can I get my AWS Lambda to access gems stored in vendor/bundle?

Question

I\'m writing a Lambda function in Ruby which will eventually send me some notifications in Slack via Webhook. So what I have for my lambda_function file is

Answer 1

I think you should not change the GEM_PATH or having to set $LOAD_PATH in every lambda functions. The "best" way is to do this little hack when you create the layer archive:

bundle install --path vendor/bundle
cd vendor/bundle
mkdir ruby/gems
mv ruby/2.5.0 ruby/gems/
zip -r layer.zip ruby/gems/2.5.0/