Knock daemon is build around three components :
Knock Daemon handles probes locally on your server(s) and pushes results asynchronously to your managed namespace.
Transport uses json/gzip over https.
Our daemon embeds a localhost UDP listener (port 63184) which handles application counters coming from SDKs.
We send mainly server hostname and probes datas toward our infrastructure (integers/floats, some string buffers - for inventory for instance).
The managed supervision namespace provides a secured web dashboard and fires notifications.
Knock Daemon is backed by an upgrade cron which keep it up-to-date:
The account you create when you sign-up has:
You can create additionnal users. These users will only have access to supervision web frontend.
By design, servers are identified by their hostname.
Having several servers with same hostname is not supported (it will work, but probe results will be inconsistent).
Renaming a server is supported, new datas will just target he new host name.
In order to notify your supervision namespace that a server is now shutdown / in maintenance mode, a JSON Api end-point will be available soon.
We bill on a server basis, with per hour pricing.
An active server - identified by its hostname - is a server for which we received at least one probe within one hour period.
We manage your supervision namespace.
This includes :