On Tue, Nov 16, 2010 at 02:27:04PM +0100, Dejan Muhamedagic wrote:
> Hi,
>
> On Mon, Nov 15, 2010 at 06:18:29PM +0100, Bernd Schubert wrote:
> > On Monday, November 15, 2010, Dejan Muhamedagic wrote:
> > > > > This may truncate entity, and of course breaks existing filtering
> > > > > setups that trigger on it.
> > >
> > > Right. So, this needs to be optional.
> >
> > Ok, any favourite option keyword in logd.cf? If it comes to me, the present
> > logd.cf *suggests* that not adding the commong log entity is a bug:
> >
> > <quote>
> > # Entity to be shown at beginning of a message
> > # for logging daemon
> > # Default: "logd"
> > entity logd
> > </quote>
> >
> > Was that option only for its own messages?
>
> Yes, and the default in case the client didn't supply its entity.
>
> > Isn't that a bit over-due?
>
> I guess you meant overkill? Perhaps.
>
> > So maybe
> > "entity none" should suppress it in the future?
>
> We can't change the semantic. So, we need a new option name.
> extra_entity? common_entity?
May I take a step backwards, and ask why we do this again?
Just to have a single filter line in syslog-ng?
Instead of, maybe, 7?
I mean: how many different entities are in use by a pacemaker cluster?
grepping through the logs of one pacemaker+heartbeat cluster for the last few
month says, order by number of occurences:
192 ccm:
262 crm_resource:
370 cibadmin:
7520 heartbeat:
8459 attrd:
10222 cib:
20285 lrmd:
24146 crmd:
175687 pengine:
Is this complete? I don't think so.
dopd, ipfail, pingd are missing, mgmtd, tengine,
maybe "ResourceManager" for haresources mode.
On a pacemaker+corosync cluster, ccm and heartbeat are missing,
and probably no other are added, as corosync won't use logd?
So what we are actually talking about is adding a common tag to all
cl_log log messages if they are handed to syslog,
just to reduce
filter ... { program("^(complete|list|of|the|above)") }
to
filter ... { program("cl_log-common-tag") }
Hmm.
Maybe we should just try to get the list complete,
and not change the logging format.
Obviously that would miss any new users of cl_log,
but I doubt that are that many.
Sorry for taking the speed out of it ;-)
My questions:
Do we really want to change the syslog format and add a common tag?
If so, hardcode it, make it configurable?
If hardcoded, which one?
Default to not use it but have a toggle to switch it on?
If configurable, default to not use it?
Should we reuse the "cluster name"?
(you did know that you can assign a cluster name to heartbeat clusters,
it defaults to linux-ha...)
ha.cf:
cluster lha-iscsiXX-buildingY-campusZ
;-)
So you can have all your clusters log to a central log server,
reliably identify them from the other message flood by some chosen prefix,
and seperate them by their full name?
No, well, I realize that it has to be a logd.cf setting,
we cannot reuse ha.cf settings really.
--
: Lars Ellenberg
: LINBIT | Your Way to High Availability
: DRBD/HA support and consulting http://www.linbit.com
DRBD® and LINBIT® are registered trademarks of LINBIT, Austria.
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