ctrl/README.md

steward

Async management of Edge units.

Concepts/Ideas

Terminology

• Node: An installation of an operating system with an ip address
• Process: One message handler running in it's own thread with 1 subject for sending and 1 for reply.
• Message:
  • Command: Something to be executed on the message received. An example can be a shell command.
  • Event: Something that have happened. An example can be transfer of syslog data from a host.

Naming

Subject

Subject naming are case sensitive, and can not contain the space are the tab character.

<nodename>.<command/event>.<method>

Nodename: Are the hostname of the device. This do not have to be resolvable via DNS, it is just a unique name for the host to receive the message.

Command/Event: Are type of message sent. command or event. Description of the differences are mentioned earlier.

Method: Are the functionality the message provide. Example could be shellcommand or syslogforwarding

Complete subject example

For syslog of type event to a host named "ship1"

ship1.event.syslogforwarding

and for a shell command of type command to a host named "ship2"

ship2.command.shellcommand