Run One Time Tasks (Jobs) about keel

[rusenask]

Hi, this will fit into plugins framework that I want to introduce into Keel. The idea is to have an option to register different plugins, examples of these plugins:

• run a custom code snippet downloaded from github/anywhere (can be limited to javascript or binary executables) or you could run a Keel derived from python, ruby images to have interpreters.
• run a k8s job
• call AWS lambda or Google Function endpoint

These plugins would take a json representation of the Deployment, could modify it, block update, cancel update or perform certain actions and then just let deployment update continue,

[luxflux]

Yep, this would make our workflow possible.

[rusenask]

I think there are now a lot better options like https://github.com/Azure/brigade to react to the events.