Cluster management expressed in a high-level declarative language(github.com)
github.com
Cluster management expressed in a high-level declarative language
https://github.com/vmware/declarative-cluster-management
4 comments
Too little too late, I think; why would I use this instead of Dhall or Nix for writing Kubernetes configuration?
Author here. Your Kubernetes configurations stay the same. This is a tool you'd use, for instance, to write the internals of Kubernetes like the scheduler.
So could you explain how this is different from conventional configuration management systems?
Configuration management systems (I'm thinking Ansible, Puppet etc) are used to declaratively execute configuration tasks at fairly slow timescales. You wouldn't use them them to say, make 1000s of VM/pod placement decisions per second.
Using DCM, we're building a Kubernetes scheduler (see the k8s-scheduler folder in the repo). It continuously listens for new pods being created and other events in k8s, and schedules these pods onto nodes using complex rules described in SQL. This is not the kind of problem that configuration management systems target.
Using DCM, we're building a Kubernetes scheduler (see the k8s-scheduler folder in the repo). It continuously listens for new pods being created and other events in k8s, and schedules these pods onto nodes using complex rules described in SQL. This is not the kind of problem that configuration management systems target.