I might be able to add NIC's -the machines are geographically quite far from me so will have to get some one to check first but say there is NIC space, will DRBD behave if I change the replicating IP addresses? Can you reccomend a procedure to follow in this case?
On 17 February 2012 14:28, David Coulson <[email protected]> wrote: > Can you add NICs? There should be no requirement for DRBD replication to > happen over any particular interface, and obviously having it's own > dedicated interfaces without a switch is much nicer than what you have now. > > DRBD doesn't support multiple networks, as it uses a constant TCP > Connection for updates - You could probably do it with some routing > protocol, but that'd be really ugly. > > > > > On 2/17/12 7:21 AM, Lawrence Strydom wrote: > > Hi Dave, > > Thanks for all the help - The default log rotation time for ubuntu seems > to be 7 days so it seems this will remain a mystery. > > A dedicated cross over for replication is not an option because the web > servers connect to the DB over the same link. Is it possible to add the > public interface as a second replication interface? Do I simply add it in > the .res file with the existing ip address? > > The setup was primary/primary uptodate/uptodate before I copied the sites > across. It then sat for a couple weeks doing nothing untill this week when > dev tested on it and this hapenned. > > L > > > > On 17 February 2012 14:01, David Coulson <[email protected]> wrote: > >> >> >> On 2/17/12 6:56 AM, Lawrence Strydom wrote: >> >> Couldn't find any PingAck's in the syslog - what else could have caused >> the split brain? >> >> >> ./syslog.2:Feb 15 13:40:35 web02 kernel: [ 16.455206] block drbd0: self >> D3CCDACF6FD7FDB8:4579E80074D400D3:C117CFF0A5777F0F:0000000000000004 >> bits:14607528 flags:0 >> ./syslog.2:Feb 15 13:40:35 web02 kernel: [ 16.455211] block drbd0: peer >> 37C841BC2AA49AC4:4579E80074D400D3:C117CFF0A5777F0F:0000000000000004 >> bits:1407177 flags:0 >> ./syslog.2:Feb 15 13:40:35 web02 kernel: [ 16.455215] block drbd0: >> uuid_compare()=100 by rule 90 >> ./syslog.2:Feb 15 13:40:35 web02 kernel: [ 16.455217] block drbd0: >> Split-Brain detected, dropping connection! >> >> Was this ever really primary/primary, uptodate/uptodate? I can't find >> anything in the logs indicating that it was ever truly dual primary. Your >> logs seem to rotate quickly, so if you are really only keeping logs going >> back three days you'll probably never know root cause. >> >> Personally, I'd bypass the switch and go with a cross-connect direct between >> the boxes - Or two if you have enough NICs. >> >> >
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