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<p class="MsoNormal"><span style="color:#1F497D">dmesg should show why earth won’t stay WFC. The “cat /proc/drbd” just shows the state, it doesn’t show the why.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">vulcan won’t connect because earth is not WFC.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Dan<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> drbd-user-bounces@lists.linbit.com [mailto:drbd-user-bounces@lists.linbit.com]
<b>On Behalf Of </b>Hans Lammerts<br>
<b>Sent:</b> Saturday, September 14, 2013 8:48 AM<br>
<b>To:</b> drbd-user@lists.linbit.com<br>
<b>Subject:</b> [DRBD-user] Unable to sync new machine<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<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
<a href="mailto:j.lammerts@chello.nl">j.lammerts@chello.nl</a>";<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" style="margin-bottom:12.0pt"><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>
}</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>
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