get-pod-app-language

A very simple, silly little kubectl plugin / utility that guesses which language an application running in a kubernetes pod was written in. Just a PoC after learning Go to prove myself I can write something that's "useful". :)

Usage

Note that kubectl-get-pod-app-language is expected to be installed as a kubectl plugin - see installation instructions here.

For standalone usage, first run go build -o app. Then, choose any of the available commands to run your application with:

./app get-pod-app-language

Guesses the language. An interactive prompt will guide you towards available pods and containers. The actual guessing is done by looking at each command in docker history and matching it against a set of available language heuristics, stored in heuristics.json.

./app get-pod-app-language list-heuristics

Lists all possible heuristics (derived from heuristics.json) that might indicate the language an application was written in. Used by get-pod-app-language to make educated guesses.

./app get-pod-app-language add-to-heuristic

An easy way to add a new heuristic - just run get-pod-app-language add-to-heuristic java ./gradlew to add the heuristic to heuristic.json.

TODO

• Add support for remote docker registries, including secret mgmt.
• Add proper CLI support using Cobra, there's a mish-mash of argument and variable passing in the code that doesn't make a lot of sense
• Support more heuristics - execing into the container and listing files, looking at actual dockerfile if available, etc..