Nagios 3.0

[Andreas Ericsson]

Mohr James wrote:
> Hi All!
> 
> I read the "wishlist" for Nagios 3.0 and the entry "Multi-Line Plugin
> Output" caught my eye. I have a couple of questions about this. Does
> this enhancement change the number of characters permitted or is simply
> allow plugins to send multiple lines, but there will still be the 350
> character limit? 
> 

(the answers really come in a bad order here, so read below)
There won't be a 350-char limit. At least not permanently.

> Although we would appreciate increasing the amount of data plug-ins can
> send, the ability to accept multiple lines is useful. Is this just a
> wish?


Yes. It's not a planned feature, so it'd be a wish.

> Is it actively being worked on? 
> 

Yes. The runcmd framework discussed for the plugins is seeing some heavy 
modifications currently, and is being adapted for daemon use. On my FC3 
laptop (1.6 Ghz or some such, 1GB RAM) I can successfully run 510 
plugins in 2 seconds, provided none take longer than 0.5 seconds 
(average plugin execution time on our system) to complete. This includes 
reading output of any length or numbers of lines on both stdout and 
stderr. The limit is (sysconf(_SC_OPEN_MAX) - 5) / 2, which means most 
systems will be able to run at least 250 checks in parallell. Linux has 
a higher "hard roof" for this particular resource, so performance 
shouldn't be a problem, and it'll get rid of the FIFO bottleneck.

As for how to store the output I'm a bit uncertain. The easiest way is 
probably to use the backslash continuation and leave it at that.


> What is the timeline for Nagios 3.0?
> 

No-one knows for sure, but given the current lack of development in 
Nagios (which is slow but ok, since everything seems to be working just 
fine), I'd say it'll be a while.

-- 
Andreas Ericsson                   andreas.ericsson at op5.se
OP5 AB                             www.op5.se
Lead Developer


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