Re: [DRBD-user] split brain detected when switching back to the 2node cluster from the DR node
Hello, Thank you for your answer. Yes, I can use these commands to handle split-brains. BUT, the thing I don't understand is why I get split-brain in this scenario. I think it's not normal to get such a split-brain when I manually switch HA services from node3 to the 2node cluster. If we look at the end of step 2 (below), we can see that everynode is connected and UpToDate (node1 point of view). It's only when I start heartbeat on node1 and 2 (normal way after the switch over) that I get this split-brain. There is something wrong somewhere but what? guohuai li a écrit : > Hi, > > > > There are several items such as below in /etc/drbd.conf. > > You may need to study it. > > > > My DRBD is 8.3.0. > > It works well. > > > > edward > > > > #after-sb-0pri disconnect; > > after-sb-0pri "discard-older-primary"; > > > > #after-sb-1pri disconnect; > > after-sb-1pri discard-secondary; > >> Date: Tue, 4 Aug 2009 18:58:15 +0200 >> From: pierre.lebr...@laposte.net >> To: drbd-user@lists.linbit.com >> Subject: [DRBD-user] split brain detected when switching back to the > 2node cluster from the DR node >> >> Hello, >> >> I always get a split brain when I switch the HA services back to the > 2node cluster from my DR node. >> STEP 1 : >> Here are the steps I follow : >> >> - HA services are on the DR node >> - I stop these HA services >> - I umount the data >> >> The state of DRBD on node3 is as follow : >> >> -- >> version: 8.3.2 (api:88/proto:86-90) >> GIT-hash: dd7985327f146f33b86 d4bff5ca8c94234ce840e build by > r...@hcns1, 2009-08-04 09:41:09 >> >> 1: cs:WFConnection ro:Primary/Unknown ds:UpToDate/DUnknown C r >> ns:0 nr:34083396 dw:34084032 dr:68168163 al:12 bm:2094 lo:0 pe:0 ua:0 > ap:0 ep:1 wo:f oos:208 >> -- >> STEP 2 : >> Then, on node1 : >> >> - drbdadm primary r0 >> - I start the HA IP >> - drbdadm --stacked up r0-U >> >> At this point, every thing is OK. Here is the output of cat /proc/drbd : >> >> -- >> version: 8.3.2 (api:88/proto:86-90) >> GIT-hash: dd7985327f146f33b86d4bff5ca8c94234ce840e build by > r...@hans1, 2009-08-04 09:43:39 >> 0: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r >> ns:13706 nr:174 dw:15096 dr:102401147 al:30 bm:2170 lo:0 pe:0 ua:0 > ap:0 ep:1 wo:f oos:0 >> 1: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r >> ns:0 nr:244 dw:244 dr:416 al:0 b m:9 lo:0 pe:0 ua:0 ap:0 ep:1 wo:d oos:0 >> -- >> >> Then, I set all things back (reset) : >> STEP 3 : >> on node1 : >> >> - drbdadm --stacked down r0-U >> - drbdadm secondary r0 >> - I stop the HA IP >> >> The state on node1 is as follow : >> >> -- >> version: 8.3.2 (api:88/proto:86-90) >> GIT-hash: dd7985327f146f33b86d4bff5ca8c94234ce840e build by > r...@hans1, 2009-08-04 09:43:39 >> 0: cs:Connected ro:Secondary/Secondary ds:UpToDate/UpToDate C r >> ns:13707 nr:174 dw:15097 dr:102401147 al:30 bm:2186 lo:0 pe:0 ua:0 > ap:0 ep:1 wo:f oos:0 >> 1: cs:Unconfigured >> -- >> >> on node3, I type these commands to reset the state : >> >> - drbdadm secondary r0-U >> STEP 4 : >> Then, on node1 and node2, I start heartbeat normally. >> >> >> >> Well, each time I follo w theses steps, node3 gets a split-brain. >> >> Where is the problem? >> >> >> >> >> context : 3-node cluster, every node connected, HA services on node1, > DRBD version 8.3.2 on linux 2.6.30. >> >> ___ >> drbd-user mailing list >> drbd-user@lists.linbit.com >> http://lists.linbit.com/mailman/listinfo/drbd-user > > > Share your memories online with anyone you want anyone you want. > <http://www.microsoft.com/middleeast/windows/windowslive/products/photos-share.aspx?tab=1> > > > > > ___ > drbd-user mailing list > drbd-user@lists.linbit.com > http://lists.linbit.com/mailman/listinfo/drbd-user ___ drbd-user mailing list drbd-user@lists.linbit.com http://lists.linbit.com/mailman/listinfo/drbd-user
Re: [DRBD-user] split brain detected when switching back to the 2node cluster from the DR node
Hi, There are several items such as below in /etc/drbd.conf. You may need to study it. My DRBD is 8.3.0. It works well. edward #after-sb-0pri disconnect; after-sb-0pri "discard-older-primary"; #after-sb-1pri disconnect; after-sb-1pri discard-secondary; > Date: Tue, 4 Aug 2009 18:58:15 +0200 > From: pierre.lebr...@laposte.net > To: drbd-user@lists.linbit.com > Subject: [DRBD-user] split brain detected when switching back to the 2node > cluster from the DR node > > Hello, > > I always get a split brain when I switch the HA services back to the 2node > cluster from my DR node. > > Here are the steps I follow : > > - HA services are on the DR node > - I stop these HA services > - I umount the data > > The state of DRBD on node3 is as follow : > > -- > version: 8.3.2 (api:88/proto:86-90) > GIT-hash: dd7985327f146f33b86d4bff5ca8c94234ce840e build by r...@hcns1, > 2009-08-04 09:41:09 > > 1: cs:WFConnection ro:Primary/Unknown ds:UpToDate/DUnknown C r > ns:0 nr:34083396 dw:34084032 dr:68168163 al:12 bm:2094 lo:0 pe:0 ua:0 ap:0 > ep:1 wo:f oos:208 > -- > > Then, on node1 : > > - drbdadm primary r0 > - I start the HA IP > - drbdadm --stacked up r0-U > > At this point, every thing is OK. Here is the output of cat /proc/drbd : > > -- > version: 8.3.2 (api:88/proto:86-90) > GIT-hash: dd7985327f146f33b86d4bff5ca8c94234ce840e build by r...@hans1, > 2009-08-04 09:43:39 > 0: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r > ns:13706 nr:174 dw:15096 dr:102401147 al:30 bm:2170 lo:0 pe:0 ua:0 ap:0 ep:1 > wo:f oos:0 > 1: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r > ns:0 nr:244 dw:244 dr:416 al:0 bm:9 lo:0 pe:0 ua:0 ap:0 ep:1 wo:d oos:0 > -- > > Then, I set all things back (reset) : > > on node1 : > > - drbdadm --stacked down r0-U > - drbdadm secondary r0 > - I stop the HA IP > > The state on node1 is as follow : > > -- > version: 8.3.2 (api:88/proto:86-90) > GIT-hash: dd7985327f146f33b86d4bff5ca8c94234ce840e build by r...@hans1, > 2009-08-04 09:43:39 > 0: cs:Connected ro:Secondary/Secondary ds:UpToDate/UpToDate C r > ns:13707 nr:174 dw:15097 dr:102401147 al:30 bm:2186 lo:0 pe:0 ua:0 ap:0 ep:1 > wo:f oos:0 > 1: cs:Unconfigured > -- > > on node3, I type these commands to reset the state : > > - drbdadm secondary r0-U > > Then, on node1 and node2, I start heartbeat normally. > > > > Well, each time I follow theses steps, node3 gets a split-brain. > > Where is the problem? > > > > > context : 3-node cluster, every node connected, HA services on node1, DRBD > version 8.3.2 on linux 2.6.30. > > ___ > drbd-user mailing list > drbd-user@lists.linbit.com > http://lists.linbit.com/mailman/listinfo/drbd-user _ Share your memories online with anyone you want. http://www.microsoft.com/middleeast/windows/windowslive/products/photos-share.aspx?tab=1___ drbd-user mailing list drbd-user@lists.linbit.com http://lists.linbit.com/mailman/listinfo/drbd-user
[DRBD-user] split brain detected when switching back to the 2node cluster from the DR node
Hello, I always get a split brain when I switch the HA services back to the 2node cluster from my DR node. Here are the steps I follow : - HA services are on the DR node - I stop these HA services - I umount the data The state of DRBD on node3 is as follow : -- version: 8.3.2 (api:88/proto:86-90) GIT-hash: dd7985327f146f33b86d4bff5ca8c94234ce840e build by r...@hcns1, 2009-08-04 09:41:09 1: cs:WFConnection ro:Primary/Unknown ds:UpToDate/DUnknown C r ns:0 nr:34083396 dw:34084032 dr:68168163 al:12 bm:2094 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:208 -- Then, on node1 : - drbdadm primary r0 - I start the HA IP - drbdadm --stacked up r0-U At this point, every thing is OK. Here is the output of cat /proc/drbd : -- version: 8.3.2 (api:88/proto:86-90) GIT-hash: dd7985327f146f33b86d4bff5ca8c94234ce840e build by r...@hans1, 2009-08-04 09:43:39 0: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r ns:13706 nr:174 dw:15096 dr:102401147 al:30 bm:2170 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0 1: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r ns:0 nr:244 dw:244 dr:416 al:0 bm:9 lo:0 pe:0 ua:0 ap:0 ep:1 wo:d oos:0 -- Then, I set all things back (reset) : on node1 : - drbdadm --stacked down r0-U - drbdadm secondary r0 - I stop the HA IP The state on node1 is as follow : -- version: 8.3.2 (api:88/proto:86-90) GIT-hash: dd7985327f146f33b86d4bff5ca8c94234ce840e build by r...@hans1, 2009-08-04 09:43:39 0: cs:Connected ro:Secondary/Secondary ds:UpToDate/UpToDate C r ns:13707 nr:174 dw:15097 dr:102401147 al:30 bm:2186 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0 1: cs:Unconfigured -- on node3, I type these commands to reset the state : - drbdadm secondary r0-U Then, on node1 and node2, I start heartbeat normally. Well, each time I follow theses steps, node3 gets a split-brain. Where is the problem? context : 3-node cluster, every node connected, HA services on node1, DRBD version 8.3.2 on linux 2.6.30. ___ drbd-user mailing list drbd-user@lists.linbit.com http://lists.linbit.com/mailman/listinfo/drbd-user
