Martin, yes, that is a possibility, but the downside is potentially having a unique gmond.conf for every host in cluster. And assuming you don't want to explicitly tag every packet with the hostname, then you would need to ensure that the "my hostname is" packet gets sent first, even then, if the source IP suddenly changed, you would still be faced with the problem of only having reverse DNS lookup at your disposal to work out the true origin of the packet.
I will think some more about this. Do other people have similar problems - would not try giving a patch back into the CVS tree if it only helped me. kind regards, Richard -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Martin Knoblauch Sent: 29 March 2006 14:18 To: Grevis, Richard: IT (LDN); ganglia-developers@lists.sourceforge.net Subject: Re: [Ganglia-developers] gmond UDP data coming from 2 NICs on a host Hi Richard, this is something on my to-do list. I really would like to have a "hostname" or "gname" (or whatever) property in the host XML that can be set via the config file. That way you can: a) name the hosts as you like b) help situations like yours If only time permits ... Patches are welcome :-) Cheers Martin --- [EMAIL PROTECTED] wrote: > I run gmond predominently on windows hosts that mostly have > 2 NICs. While many hosts have NIC teaming, many hosts do not, and > sometimes (semi-randomly) the src address for UDP data will flick from > one host IP to the other. > > The effect of course on gmond and thence gmetad is that you get 2 XML > entries for the host, 1 with the new IP, and with the old IP which > does not get updated, and will eventually be reported as down. > Depending on which XML entry comes last, one either does not notice > this, or you get erroneous host down statuses. > > So what is the best thing to do about this? > > The pertinent code snippet in gmond.c is: > > static Ganglia_host * > Ganglia_host_get( char *remoteip, apr_sockaddr_t *sa, Ganglia_message > *fullmsg) > { > apr_status_t status; > apr_pool_t *pool; > Ganglia_host *hostdata; > char *hostname = NULL; > > if(!remoteip || !sa || !fullmsg) > { > return NULL; > } > > hostdata = (Ganglia_host *)apr_hash_get( hosts, remoteip, > APR_HASH_KEY_STRING ); > if(!hostdata) > { > /* Lookup the hostname or use the proxy information if available > */ > if( !hostname ) > ... > > The hosts structure being keyed from the remoteip causes the problem. > Perhaps if I keyed this hash with a hostname, and had a separate hash > to optimise the > ip -> hostname mapping, perhaps that will do? > > I would appreciate guidance. > > thanks, > Richard > > > ------------------------------------------------------------------------ > For more information about Barclays Capital, please > visit our web site at http://www.barcap.com. > > > Internet communications are not secure and therefore the Barclays > Group does not accept legal responsibility for the contents of this > message. Although the Barclays Group operates anti-virus programmes, > > it does not accept responsibility for any damage whatsoever that is > caused by viruses being passed. Any views or opinions presented are > solely those of the author and do not necessarily represent those of > the > Barclays Group. Replies to this email may be monitored by the > Barclays > Group for operational or business reasons. > > ------------------------------------------------------------------------ > > > > ------------------------------------------------------- > This SF.Net email is sponsored by xPML, a groundbreaking scripting > language that extends applications into web and mobile media. Attend > the live webcast > and join the prime developer group breaking into this new coding > territory! > http://sel.as-us.falkag.net/sel?cmd=lnk&kid0944&bid$1720&dat1642 > _______________________________________________ > Ganglia-developers mailing list > Ganglia-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/ganglia-developers > > ------------------------------------------------------ Martin Knoblauch email: k n o b i AT knobisoft DOT de www: http://www.knobisoft.de ------------------------------------------------------- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642 _______________________________________________ Ganglia-developers mailing list Ganglia-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ganglia-developers
