Karmen

Centralized Pub/Sub for microservices

2.0 release

I rewrote Karmen from the ground up in July 2021. It is incompatible with version 1.0.

Karmen now runs off of gRPC, which cuts down lots of nasty bugs
if: as a key under an action is now a reserved word for conditional expressions
parallel and serial blocks should perform how you expect...each block is done serially
Context variables - actions can return parameters that are injected into a block-level state. These can be referenced in conditionals with {hostname-action-variablename}
- I'll be converting the dashes to dots once I add that feature to the condition parser I used
- For each action, the {hostname-action-pass} boolean is set automatically so you can conditionally run actions based on the result of previous actions without managing a parameter. Code 200 is defined as a pass
Action error handling is improved, currently returning HTTP-like codes. I may downgrade this to a boolean

See Docker Hub for releases
See an example config to start declaring your workflow
Run Karmen as part of your docker-compose.yml. see my example docker-compose.yml

Python - example in karmen.py when executed as script
Golang - example in main.go
Rust - example in example/src/main.rs Crates.io
Or write your own! Karmen runs on gRPC. See existing implementations for reference