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The recent Saltstack discussion touched on some interesting issues.
I've spent some time looking at similar issues...
The Assimilation Monitoring Project (AMP) does discovery-driven
monitoring. It discovers servers, services, switches, switch
connections, and dependencies, and also monitors servers and services
for exceptions. The first (toy) release came out recently.
It is intended to scale into the >> 10K server range. The problem is
different from what you've been discussing but related (particularly
because of the discovery), but I bet you folks would have interesting
things to say about it.
[/me ducks]
The key idea for scalable monitoring is that the monitoring is fully
distributed.
There are hooks for authentication and encryption, but there's no
meaningful authentication yet, and no encryption at all. It's coming ;-)
Communication is a reliable protocol on top of UDP. So, there's only
one socket on the central server ;-).
You can read all about it at:
http://assimmon.org/
There are also a few articles about it on my blog:
http://techthoughts.typepad.com
See also:
http://linux-ha.org/source-doc/assimilation/html/_release_descriptions.html
I hadn't thought about signing the discovery and monitoring scripts --
but that seems like a great idea. I'll add it to my "todo" list.
*
**I will send project stickers to anyone who makes thoughtful comments
on it - or tries it out - and emails me an address to send them to.*
- --
Alan Robertson <al...@unix.sh> - @OSSAlanR
"Openness is the foundation and preservative of friendship... Let me
claim from you at all times your undisguised opinions." - William
Wilberforce
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