Hello William I think it's better you make clvmd start at boot
chkconfig cman on ; chkconfig clvmd on Il giorno 13 marzo 2012 23:29, William Seligman <selig...@nevis.columbia.edu > ha scritto: > On 3/13/12 5:50 PM, emmanuel segura wrote: > > > So if you using cman why you use lsb::clvmd > > > > I think you are very confused > > I don't dispute that I may be very confused! > > However, from what I can tell, I still need to run clvmd even if I'm > running > cman (I'm not using rgmanager). If I just run cman, gfs2 and any other > form of > mount fails. If I run cman, then clvmd, then gfs2, everything behaves > normally. > > Going by these instructions: > > <https://alteeve.com/w/2-Node_Red_Hat_KVM_Cluster_Tutorial> > > the resources he puts under "cluster control" (rgmanager) I have to put > under > pacemaker control. Those include drbd, clvmd, and gfs2. > > The difference between what I've got, and what's in "Clusters From > Scratch", is > in CFS they assign one DRBD volume to a single filesystem. I create an LVM > physical volume on my DRBD resource, as in the above tutorial, and so I > have to > start clvmd or the logical volumes in the DRBD partition won't be > recognized. > > Is there some way to get logical volumes recognized automatically by cman > without rgmanager that I've missed? > > > Il giorno 13 marzo 2012 22:42, William Seligman < > selig...@nevis.columbia.edu > >> ha scritto: > > > >> On 3/13/12 12:29 PM, William Seligman wrote: > >>> I'm not sure if this is a "Linux-HA" question; please direct me to the > >>> appropriate list if it's not. > >>> > >>> I'm setting up a two-node cman+pacemaker+gfs2 cluster as described in > >>> "Clusters From Scratch." Fencing is through forcibly rebooting a node > by > >>> cutting and restoring its power via UPS. > >>> > >>> My fencing/failover tests have revealed a problem. If I gracefully turn > >>> off one node ("crm node standby"; "service pacemaker stop"; "shutdown > -r > >>> now") all the resources transfer to the other node with no problems. > If I > >>> cut power to one node (as would happen if it were fenced), the > lsb::clvmd > >>> resource on the remaining node eventually fails. Since all the other > >>> resources depend on clvmd, all the resources on the remaining node stop > >>> and the cluster is left with nothing running. > >>> > >>> I've traced why the lsb::clvmd fails: The monitor/status command > >>> includes "vgdisplay", which hangs indefinitely. Therefore the monitor > >>> will always time-out. > >>> > >>> So this isn't a problem with pacemaker, but with clvmd/dlm: If a node > is > >>> cut off, the cluster isn't handling it properly. Has anyone on this > list > >>> seen this before? Any ideas?>>> > >>> Details: > >>> > >>> versions: > >>> Redhat Linux 6.2 (kernel 2.6.32) > >>> cman-3.0.12.1 > >>> corosync-1.4.1 > >>> pacemaker-1.1.6 > >>> lvm2-2.02.87 > >>> lvm2-cluster-2.02.87 > >> > >> This may be a Linux-HA question after all! > >> > >> I ran a few more tests. Here's the output from a typical test of > >> > >> grep -E "(dlm|gfs2}clvmd|fenc|syslogd)" /var/log/messages > >> > >> <http://pastebin.com/uqC6bc1b> > >> > >> It looks like what's happening is that the fence agent (one I wrote) is > >> not returning the proper error code when a node crashes. According to > this > >> page, if a fencing agent fails GFS2 will freeze to protect the data: > >> > >> < > http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Global_File_System_2/s1-gfs2hand-allnodes.html > > > >> > >> As a test, I tried to fence my test node via standard means: > >> > >> stonith_admin -F orestes-corosync.nevis.columbia.edu > >> > >> These were the log messages, which show that stonith_admin did its job > and > >> CMAN was notified of the fencing: <http://pastebin.com/jaH820Bv>. > >> > >> Unfortunately, I still got the gfs2 freeze, so this is not the complete > >> story. > >> > >> First things first. I vaguely recall a web page that went over the > STONITH > >> return codes, but I can't locate it again. Is there any reference to the > >> return codes expected from a fencing agent, perhaps as function of the > >> state of the fencing device? > > -- > Bill Seligman | Phone: (914) 591-2823 > Nevis Labs, Columbia Univ | mailto://selig...@nevis.columbia.edu > PO Box 137 | > Irvington NY 10533 USA | http://www.nevis.columbia.edu/~seligman/ > > > _______________________________________________ > Linux-HA mailing list > Linux-HA@lists.linux-ha.org > http://lists.linux-ha.org/mailman/listinfo/linux-ha > See also: http://linux-ha.org/ReportingProblems > -- esta es mi vida e me la vivo hasta que dios quiera _______________________________________________ Linux-HA mailing list Linux-HA@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
