On Dec 13, 2010, at 4:49 PM, [email protected] wrote: > I'm pretty sure that rsyslog only looks up the hostname at startup time. are > you seeing something in testing that indicates that it's looking up the > hostname repeatedly? > > If this is happening, it should be changed to only look it up once, just from > a performance point of view, but I sure don't remember seeing anything like > that in my performance tests.
No, it's a funny edge case on EC2 (and likely elsewhere) where the hostname is set by DHCP. If one reboots and rsyslog starts before the hostname has been set it caches the wrong one. My solution in the past (for other applications) has been to set the hostname statically in the configuration or as a command argument of the application. Ideally I would be able to override the hostname lookup in rsyslog with my own value, if it only gets set once I can't imagine the patch being too difficult. I'll take a look in the morning but if anyone has any pointers/suggestions please chime in. -Joe > On Mon, 13 Dec 2010, Joe Williams wrote: > >> David, >> >> Thanks but that won't work. I want to enforce the hostname that rsyslog is >> started with in case the hostname changes at some point. >> >> -Joe >> >> >> >> On Dec 13, 2010, at 1:20 PM, [email protected] wrote: >> >>> On Mon, 13 Dec 2010, Rainer Gerhards wrote: >>> >>>> Unfortunately, this is not possible... >>> >>> however, what you can do is to change the template to put any string you >>> want instead of %hostname%, that will have the same effect. >>> >>> David Lang >>> >>>> Rainer >>>> >>>>> -----Original Message----- >>>>> From: [email protected] [mailto:rsyslog- >>>>> [email protected]] On Behalf Of Joe Williams >>>>> Sent: Monday, December 13, 2010 9:04 PM >>>>> To: rsyslog-users >>>>> Subject: [rsyslog] setting the hostname >>>>> >>>>> >>>>> List, >>>>> >>>>> I would like to statically set the hostname (don't use the actual >>>>> hostname of the system) that rsyslogd uses for a node in the >>>>> configuration or as an argument to the rsyslogd command on that node. I >>>>> didn't immediately see a way to do this in the docs, is this possible? >>>>> >>>>> Thanks. >>>>> >>>>> -Joe >>>>> >>>>> >>>>> >>>>> Name: Joseph A. Williams >>>>> Email: [email protected] >>>>> Blog: http://www.joeandmotorboat.com/ >>>>> Twitter: http://twitter.com/williamsjoe >>>>> >>>>> _______________________________________________ >>>>> rsyslog mailing list >>>>> http://lists.adiscon.net/mailman/listinfo/rsyslog >>>>> http://www.rsyslog.com >>>> _______________________________________________ >>>> rsyslog mailing list >>>> http://lists.adiscon.net/mailman/listinfo/rsyslog >>>> http://www.rsyslog.com >>>> >>> _______________________________________________ >>> rsyslog mailing list >>> http://lists.adiscon.net/mailman/listinfo/rsyslog >>> http://www.rsyslog.com >> >> Name: Joseph A. Williams >> Email: [email protected] >> Blog: http://www.joeandmotorboat.com/ >> Twitter: http://twitter.com/williamsjoe >> >> _______________________________________________ >> rsyslog mailing list >> http://lists.adiscon.net/mailman/listinfo/rsyslog >> http://www.rsyslog.com >> > _______________________________________________ > rsyslog mailing list > http://lists.adiscon.net/mailman/listinfo/rsyslog > http://www.rsyslog.com Name: Joseph A. Williams Email: [email protected] Blog: http://www.joeandmotorboat.com/ Twitter: http://twitter.com/williamsjoe _______________________________________________ rsyslog mailing list http://lists.adiscon.net/mailman/listinfo/rsyslog http://www.rsyslog.com
