Hi Risto,
Thanks, you were right, I followed your hints and it worked for me.
However, I used copy action instead of report action to catch the follow-up
events.
The rules look as below:
type=Single
ptype=RegExp
pattern=(d{1,4}-d{1,2}-d{1,2})s(d{1,2}:d{1,2}:d{1,2})s(d{1,3}.d{1,3}.d{1,3}.d{1,3})s(linkDown)sifIndexs(d{8}).*ifDescrs+(w+)s(w+)
varmap= date=1; time=2; ip=3; event=4; ifIndex=5; Descr=6; devname=7
desc=$+{date} $+{time} $+{ip} Interface down ($+{event}) IP = $+{ip} followed by
action=create linkDown_$+{ip} 3 (copy linkDown_$+{ip} %h; event %s %h alarms at
$+{devname})
type=Single
ptype=RegExp
pattern=(d{1,3}.d{1,3}.d{1,3}.d{1,3})s(w+)svRtrRsvpIfStateChange
varmap= ip=1; devname=2
desc=$0
action=add linkDown_$+{ip} vRtrRsvpIfStateChange
type=Single
ptype=RegExp
pattern=(d{1,3}.d{1,3}.d{1,3}.d{1,3})s(w+)svRtrRsvpIfNbrStateDown|
varmap= ip=1; devname=2
desc=$0
action=add linkDown_$+{ip} vRtrRsvpIfNbrStateDown
type=SingleWithSuppress
ptype=RegExp
pattern=(d{1,4}-d{1,2}-d{1,2})s(d{1,2}:d{1,2}:d{1,2})s(d{1,3}.d{1,3}.d{1,3}.d{1,3})sInterface
down.+ats(w+)
varmap= date=1; time=2; ip=3; devname=4;
desc=$4
action=write - $+{date} $+{time} Interface down at $+{devname} and IP = $+{ip}
supressed for 60 seconds.
window=60
As you can see, in the first rule I copied the follow-up events to the h
variable. However,
I want to mix the content of the h variable with desc content and an extra text
that follows h variable and feedback
to Sec at the end of the context.
The event action works fine but I noticed that it feed Sec with multiple input
streams because the action copy adds
newline after each event it store in the context. How could I join in a single
line or input stream the events store
at h variable? I want a single line so the last rule (SingleWithSuppress) can
match the input.
Thanks for any suggestion.
Gaoke.
On 12/14/2011 04:19 PM, mindman101 wrote:
> Hi Risto,
>
> Thanks for your answer, you've got the idea.
>
> However, I still have a final doubt.
>
> The association among root cause and its son events are both IP and device
> name. So, the Single rule and the Eventgroup rule type work fine from your
> example but the second one requires that each event arrives at least once.
>
> How would you apply a rule like Eventgroup but without needing all events
> arrive at least once? I mean, the root cause must trigger the context for the
> son events (the Single rule) but it's desired that the Eventgroup rule match
> with one, two or more events.
>
> For example, I'll call the root cause as P1 and its son events as S1, S2 and
> S3, then the idea is to match and report the following occurrences:
>
> P1 -> S1 or
> P1 -> S3& S2 or
> P1 -> S2& S3& S1 or
> any other combination
>
> Cheers,
>
> Gaoke
>
I would address this problem with the following rule logic:
1) have a rule which matches P1 event with Single rule and creates a
context for the host name and interface name (for example,
PROBLEM_host12_eth3).
Set the context lifetime to N seconds and action-on-expire to something
that reports the context event store. N is the window for capturing P1
and optional S1, S2 and S3 that might follow.
Finally, add P1 to the context as the first event.
2) have three Single rules which match S1, S2 and S3 events if the
context PROBLEM_ exists for a given host name and interface name. Each
time there is a match, the event is added to the context.
Since in the first rule you have configured reporting the context, P1
and optional follow-up events S* will get reported after N seconds.
In the SEC FAQ, there is an example which follows this thinking quite
closely: http://simple-evcorr.sourceforge.net/FAQ.html#17
Although it is written for events of one type only, I think it is
straightforward to extend it for several event types, given the examples
you already have from previous posts.
HTH,
risto
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