I couldn't come up with a good name, so I came up with a lame one instead: LAMbdaEXecutor.

We often write our system tests as Go tests. Sometimes these tests can also be pointed at either local or remote deployments. The issue arises when our CI/CD pipeline needs to run system tests against services which are only accessible inside of our VPC. We were scping test files to jump boxes and running them as a manual process. Automating it didn't feel much better.

So I was wondering whether it'd be possible to compile a Go test binary and run it in a Lambda. The answer was yes, but even if the process returned 0, Lambda would interpret that as a failed invocation, since it didn't receive the response it expected.

This is a very simple approach to the problem. Take a newline separated text file for any commands you may want to run, parse it, run the commands sequentially while piping their output to stdout, and return an error if any of them errored, else return nil.

First compile the lamex binary to run on Lambda (or get it from the releases page)

cd $GOPATH/src/gitub.com/sbogacz/lamex
GOOS=linux GOARCH=amd64 go build -o lamex

Write your commands.txt file, e.g.

echo "./system-tests -test.v" > commands.txt

Zip it up with the binary you'd like to run, e.g.

zip code.zip lamex yourCompiledBinary commands.txt

Upload it to Lambda, and make sure the Handler is set to lamex (or whatever name you gave it at compilation time)