Core overview

This is just a quick introduction to the core concepts of ctrl. Details can be found by reading further in the Core ctrl section.

Concept

In ctrl all nodes are treated equally, and there is no concept of client/server. There are just nodes that can send messages to other nodes, and the messages contains commands of what to do on the node that receives the message.

A message can be sent from a node to one, many, groups or all nodes with a command to execute, and the result of when the command is done will be sent back to where the message originated.

Central

There should be at least one node acting as the central in each environment. The central node will have functionality like:

• Audit logging of all commands sent and executed on nodes.
• Handling and distributing keys for signing messages.
• Handling and distributing Access Lists (ACL) for authorizing messages.
• General error logging.