So you actually suggest to write two rules instead of one, like this:
---
HOST=somehost EXSERVICE=someservice
MAIL admin at domain.com
HOST=* EXHOST=somehost
MAIL admin at domain.com
---
IMHO this "hostrules plus catch-all rule with these hosts excepted"
makes rule writing more complex and error-prone than with one catch-all
rule with several IGNORE-s needed. As I said for human eye they seem
equal (only catch-all rule with ignores is more readable).
But, can somebody point the use-case where this "IGNORE is not part of
rule and therefore is blocking UNMATCHED to trigger" behavior is
actually useful and needed?
As I said, IMHO this behavior leads to unwanted non-alerting only.
Man page says about UNMATCHED:
---
UNMATCHED - The alert is sent to this recipient ONLY if no other
recipients received an alert for this event.
---
No mention of IGNORE is blocking UNMATCHED. So I somehow suggest not
only me was confused...
Can this behavior be considered to be changed (or configurable in
xymonserver.cfg)? I volunteer to be alpha-tester...
Märt
On 3.08.2015 23:00, Mike Burger wrote:
> If you want to exclude someservice on a specific host, don't you use:
>
> HOST=somehost EXSERVICE=someservice
> MAIL supervisor at domain.com
>
> On 2015-08-03 3:04 pm, Märt Laak wrote:
>> Thank you for explaining things, Jeremy!
>>
>> But don't you think this behavior can easily lead to unwanted
>> non-alerting?
>>
>> And, more important, IMHO makes impossible to exclude alerts based
>> multiple types together.
>>
>> Consider if admin does not want to be alerted on somehost.someservice.
>> How to configure that?
>>
>> Fe. This does not work:
>> ---
>> HOST=* EXHOST=somehost EXSERVICE=someservice
>> MAIL admin at domain.com
>>
>> HOST=*
>> MAIL supervisor at domain.com UNMATCHED
>> ---
>> Using this construction admin does not get alert on
>> somehost.someotherservice, not to mention that all other host
>> someservice-s are also ignored. However, supervisor gets alerted
>> correctly.
>>
>> I could rewrite this so that admin is happy:
>> ---
>> HOST=*
>> IGNORE HOST=somehost SERVICE=someservice
>> MAIL admin at domain.com
>>
>> HOST=*
>> MAIL supervisor at domain.com UNMATCHED
>> ---
>> But in this case supervisor is not happy, as he gets no alerts when
>> nobody is alerted (as he expects by UNMATCHED) - on
>> somehost.someservice nobody gets alerted.
>>
>> So please help me how to configure alerts in this situation?
>>
>> With kindest regards,
>> Märt
>>
>> On 3.08.2015 4:25, Jeremy Laidman wrote:
>>> I think this can be explained from the man page:
>>>
>>> "IGNORE - This is used to define a recipient that does NOT trigger any
>>> alerts, and also terminates the search for more recipients."
>>>
>>> What this means is that the rule matched the host "somehost" but the
>>> alert for the recipient was suppressed. The fact that it matched means
>>> that the UNMATCHED rule will not be invoked.
>>>
>>> By contrast, the EXHOST causes the rule to not match "somehost", hence
>>> will match the UNMATCHED rule.
>>>
>>> I hope this explains.
>>>
>>> Cheers
>>> Jeremy
>>>
>>>
>>> On 31 July 2015 at 16:34, Märt Laak <mart.laak at active.ee
>>> <mailto:mart.laak at active.ee>> wrote:
>>>
>>> Hi Henrik and others who help to develop this invaluable piece of
>>> software, Xymon!
>>>
>>> I've been used BB more than 15 years for now and now trying to
>>> migrate to Xymon because it seems more flexible and powerful to me.
>>> Now I'm in the middle of converting my existing (fairly complex)
>>> bbwarnrules to alerts.cfg
>>>
>>> Everything works great except some strange to me cases with
>>> UNMATCHED.
>>>
>>> For example, if you look at these two configurations - they seem
>>> similar to human eye:
>>>
>>> 1: using IGNORE
>>> ---
>>> HOST=*
>>> IGNORE HOST=somehost
>>> MAIL admin at domain.com
>>>
>>> HOST=*
>>> MAIL supervisor at domain.com UNMATCHED
>>> ---
>>>
>>> 2: using EX...
>>> ---
>>> HOST=* EXHOST=somehost
>>> MAIL admin at domain.com
>>>
>>> HOST=*
>>> MAIL supervisor at domain.com UNMATCHED
>>> ---
>>>
>>> However, the first (IGNORE HOST) construction does NOT send alert to
>>> supervisor at admin.com <mailto:supervisor at admin.com> in case of
>>> somehost alert, as expected.
I think this can be explained from the man page:
"IGNORE - This is used to define a recipient that does NOT trigger any
alerts, and also terminates the search for more recipients."
What this means is that the rule matched the host "somehost" but the alert
for the recipient was suppressed. The fact that it matched means that the
UNMATCHED rule will not be invoked.
By contrast, the EXHOST causes the rule to not match "somehost", hence will
match the UNMATCHED rule.
I hope this explains.
Cheers
Jeremy
On 31 July 2015 at 16:34, Märt Laak <mart.laak at active.ee> wrote:
> Hi Henrik and others who help to develop this invaluable piece of
> software, Xymon!
>
> I've been used BB more than 15 years for now and now trying to migrate to
> Xymon because it seems more flexible and powerful to me. Now I'm in the
> middle of converting my existing (fairly complex) bbwarnrules to alerts.cfg
>
> Everything works great except some strange to me cases with UNMATCHED.
>
> For example, if you look at these two configurations - they seem similar
> to human eye:
>
> 1: using IGNORE
> ---
> HOST=*
> IGNORE HOST=somehost
> MAIL admin at domain.com
>
> HOST=*
> MAIL supervisor at domain.com UNMATCHED
> ---
>
> 2: using EX...
> ---
> HOST=* EXHOST=somehost
> MAIL admin at domain.com
>
> HOST=*
> MAIL supervisor at domain.com UNMATCHED
> ---
>
> However, the first (IGNORE HOST) construction does NOT send alert to
> supervisor at admin.com in case of somehost alert, as expected.
>
> Is it bug or is there some explanation for this behavior?
>
> With kindest regards,
> Märt
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