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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hi there,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’ve been using drbd for approx. 2 years now, and never had any big problems.<o:p></o:p></p><p class=MsoNormal>Recently, one of two machines in my cluster crashed, and I had to reinstall it completely.<o:p></o:p></p><p class=MsoNormal>Now I seem to be unable to sync that second machine with the first one.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The situation:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’m using drbd 8.4.0<o:p></o:p></p><p class=MsoNormal>Machine 1 is called earth, machine 2 is called vulcan.<o:p></o:p></p><p class=MsoNormal>Earth is the survivor half of my cluster, and vulcan had to be rebuilt.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The actions I’ve taken:<o:p></o:p></p><p class=MsoNormal>After compiling drbd on vulcan, I copied the resource file from /etc/drbd.d from earth to<o:p></o:p></p><p class=MsoNormal>vulcan in the same place. In this case, the resource file for mysql, which looks like this :<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoListParagraph><span style='color:#3366FF'>resource mysql {<br> protocol C;<br> syncer {<br> rate 4M;<br> }<br> startup {<br> wfc-timeout 15;<br> degr-wfc-timeout 60;<br> }<o:p></o:p></span></p><p class=MsoListParagraph><span style='color:#3366FF'>handlers {<o:p></o:p></span></p><p class=MsoListParagraph><span style='color:#3366FF'>split-brain "/usr/lib/drbd/notify-split-brain.sh j.lammerts@chello.nl";<br>}<o:p></o:p></span></p><p class=MsoListParagraph><span style='color:#3366FF'>net {<br> cram-hmac-alg sha1;<br> shared-secret "xxxxxxxxxxx";<o:p></o:p></span></p><p class=MsoListParagraph><span style='color:#3366FF'>verify-alg sha1;<o:p></o:p></span></p><p class=MsoListParagraph><span style='color:#3366FF'><o:p> </o:p></span></p><p class=MsoListParagraph><span style='color:#3366FF'>after-sb-0pri discard-zero-changes;<o:p></o:p></span></p><p class=MsoListParagraph><span style='color:#3366FF'>after-sb-1pri discard-secondary;<o:p></o:p></span></p><p class=MsoNormal><span style='color:#3366FF'> after-sb-2pri disconnect;<br> }<br> on vulcan {<br> device /dev/drbd0;<br> disk /dev/sda5;<br> address 192.168.0.15:7788;<br> meta-disk internal;<br> }<br> on earth {<br> device /dev/drbd0;<br> disk /dev/sda5;<br> address 192.168.0.5:7788;<br> meta-disk internal;<br> }<br>}<br><br></span><o:p></o:p></p><p class=MsoNormal>Then, I created the device meta-data on vulcan:<o:p></o:p></p><p class=MsoNormal>drbdadm create-md mysql<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>After (re)starting drbd on both machines, the cat /proc/drbd shows this:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>earth:<o:p></o:p></p><p class=MsoNormal>[root@earth ~]# cat /proc/drbd<o:p></o:p></p><p class=MsoNormal>version: 8.4.0 (api:1/proto:86-100)<o:p></o:p></p><p class=MsoNormal>GIT-hash: 28753f559ab51b549d16bcf487fe625d5919c49c build by root@earth, 2013-09-07 17:35:35<o:p></o:p></p><p class=MsoNormal> 0: cs:StandAlone ro:Primary/Unknown ds:UpToDate/DUnknown r-----<o:p></o:p></p><p class=MsoNormal> <span lang=NL>ns:0 nr:0 dw:19360172 dr:6497416 al:138 bm:50 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:216372<o:p></o:p></span></p><p class=MsoNormal><span lang=NL><o:p> </o:p></span></p><p class=MsoNormal>vulcan:<o:p></o:p></p><p class=MsoNormal>[root@vulcan drbd.d]# cat /proc/drbd<o:p></o:p></p><p class=MsoNormal>version: 8.4.0 (api:1/proto:86-100)<o:p></o:p></p><p class=MsoNormal>GIT-hash: 28753f559ab51b549d16bcf487fe625d5919c49c build by root@vulcan, 2013-09-12 16:25:17<o:p></o:p></p><p class=MsoNormal> 0: cs:StandAlone ro:Secondary/Unknown ds:Inconsistent/DUnknown r----s<o:p></o:p></p><p class=MsoNormal> <span lang=NL>ns:0 nr:0 dw:0 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:4652876<o:p></o:p></span></p><p class=MsoNormal><span lang=NL><o:p> </o:p></span></p><p class=MsoNormal>So both Standalone, and Primary/Unknown vs. Secondary/Unknown.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Having Googled for this situation and its solution, I tried the solution as described in the Linbit DRBD manual,<o:p></o:p></p><p class=MsoNormal>but “stopping short of 5.4”. The only thing that happens (as far as I can see) is that earth briefly goes into<o:p></o:p></p><p class=MsoNormal>the WFConnection state, and nothing else.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I tried the following as well:<o:p></o:p></p><p class=MsoNormal>On earth:<o:p></o:p></p><p class=MsoNormal>drbdadm connect all<o:p></o:p></p><p class=MsoNormal>On vulcan:<o:p></o:p></p><p class=MsoNormal>drbdadm -- --discard-my-data connect all (or drbdadm connect –discard-my-data mysql, can’t remember exactly)<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>But this did not get the synching of the resource started as well.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’m out of ideas, and can’t really find anything searching Google different from what I have already tried.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>So, please, if anyone can give me a clou on how to resolve this situation, preferably without losing any data on earth,<o:p></o:p></p><p class=MsoNormal>I would be most grateful.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks,<o:p></o:p></p><p class=MsoNormal>Hans<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>