[Xymon] Order of values in analysis.cfg

[Becker Christian]

Jeremy,


thank you for your detailed explanation.


Sure, i did remember that the man of analysis.cfg says "The entire file is evaluated from the top to bottom, and the first match found is used. So you should put the specific settings first, and the generic ones last."

But, when i was testing i din’t use the „xymond_client –dump-config“, and then i probably have been too impatient to wait for a result.



Thank you all!



Regards - stay healthy – take care!

Christian



Von: Jeremy Laidman <jeremy at laidman.org>
Gesendet: Montag, 14. Dezember 2020 04:31
An: Becker Christian <christian.becker at rhein-zeitung.net>
Cc: xymon at xymon.com
Betreff: Re: [Xymon] Order of values in analysis.cfg

Hi Christian

TL;DR: Xymon will use the first line for the test in the analysis.cfg file that matches either hostname or class.

As far as I can tell, it's the first matching line that wins. For instance, the MEMACT line that will match a Linux host called LINUX-1 will be the line in CLASS=linux, setting MEMACT=80/85. If you moved the HOST=LINUX-1 above CLASS=linux then that would match instead, so MEMACT=85/90. And if you moved the DEFAULT entry above that, then you would have MEMACT=90/95. This is why the example analysis.cfg says that the DEFAULT section "must be placed at the end of the file". It's also why you can have two lines for the same test in the same section, and only the first one will be used.

Internally, Xymon converts every rule line into a certain structure. You can dump this structure using "xymond_client --dump-config", with the format being "<TESTNAME> <alert parameters> [HOST|CLASS]=<section>". You can then check each line to see if it is the test you're interested in, and if it matches either class or hostname then those are the parameters it will use for colour selection.

Also note that the class defaults to the OS name, but can be different. So in essence the flow is effectively like this:

Repeat for each line:
    Is the line for the test we're interested in? (eg MEMACT)?
    If so, does the section name match the OS or the class or the hostname?
    If so, this is the line for you -> exit

Cheers
Jeremy

On Fri, 11 Dec 2020 at 22:26, Becker Christian <christian.becker at rhein-zeitung.net<mailto:christian.becker at rhein-zeitung.net>> wrote:
Hello to the list,

this is probably the 50st question about this…..

Can anybody guide me to understand, how individual machine thresholds, default thresholds and class thresholds are interpreted in analysis.cfg for different servers and in which order?

Let me say this is my analysis.cfg (this is not my working analysis.cfg, it’s shown here just to ask my question):


# Drop windows servers below here
    CLASS=win32
            MEMACT  85 90
            MEMACT  85 90
            MEMSWAP 85 90

    HOST=WINDOWS-1
            MEMACT  97 98

# Drop powershell configured servers below here
    CLASS=powershell
            MEMACT  90 95
            MEMACT  90 95
            MEMSWAP 90 95

    HOST=WINDOWS-2
            MEMACT  90 92

# Drop linux servers below here
    CLASS=linux
           PROC    %(syslogd|syslog-ng|rsyslogd)
            PROC   sshd
            MEMACT  80 85
            MEMACT  80 85
            MEMSWAP 80 85

    HOST=LINUX-1
            MEMACT  85 90

# Default values
    DEFAULT
            DISK    * 90 95
            MEMSWAP 80 90
            MEMACT  90 95

I have difficulties to understand, how the values would be applied. Is it that way, that it looks to the class of a host and applies the values of the class first, then the rule per hostname, and then the default? Or does it stop at the first match?

Regards, greetings from Germany
Christian
_______________________________________________
Xymon mailing list
Xymon at xymon.com<mailto:Xymon at xymon.com>
http://lists.xymon.com/mailman/listinfo/xymon<https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Flists.xymon.com%2Fmailman%2Flistinfo%2Fxymon&data=04%7C01%7Cchristian.becker%40rhein-zeitung.net%7Cb30a123722ca4aa8aac808d89fe0a881%7C4fed923898bc4f3b96450b99f4d1b669%7C0%7C0%7C637435134549093128%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=fgzp%2FDQCnpg%2FW0vJPBixyI81WD8HykdioATf%2FMYqhmc%3D&reserved=0>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.xymon.com/pipermail/xymon/attachments/20201214/f8d4e0c1/attachment.htm>