<html><body><div style="color:#000; background-color:#fff; font-family:arial, helvetica, sans-serif;font-size:10pt"><div>Hi Thomas,</div><div><br></div><div style="color: rgb(0, 0, 0); font-size: 13.3333px; font-family: arial,helvetica,sans-serif; background-color: transparent; font-style: normal;">Why don't you re-test DRBD 8.4.2 using Wheezy (Linux 3.2.0-4-amd64 #1 SMP Debian 3.2.41-2 x86_64 GNU/Linux) ? If the error show again, that could be the answer that the problem is fixed in 8.4.3.</div><div style="color: rgb(0, 0, 0); font-size: 13.3333px; font-family: arial,helvetica,sans-serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 13.3333px; font-family: arial,helvetica,sans-serif; background-color: transparent; font-style: normal;"><br><span></span></div><div style="color: rgb(0, 0, 0); font-size: 13.3333px; font-family: arial,helvetica,sans-serif; background-color: transparent;
font-style: normal;"><span>Regards</span></div><div style="color: rgb(0, 0, 0); font-size: 13.3333px; font-family: arial,helvetica,sans-serif; background-color: transparent; font-style: normal;"><span>Louis</span></div><div style="color: rgb(0, 0, 0); font-size: 13.3333px; font-family: arial,helvetica,sans-serif; background-color: transparent; font-style: normal;"><br><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; margin-top: 5px; padding-left: 5px;"> <div style="font-family: arial, helvetica, sans-serif; font-size: 10pt;"> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div dir="ltr"> <hr size="1"> <font face="Arial" size="2"> <b><span style="font-weight:bold;">From:</span></b> Thomas Thrainer <thomasth@google.com><br> <b><span style="font-weight: bold;">To:</span></b> Louis <mailtolouis2020-forum@yahoo.com> <br><b><span style="font-weight: bold;">Cc:</span></b> Luca
Fornasari <luca.fornasari@gmail.com>; DRBD <drbd-user@lists.linbit.com> <br> <b><span style="font-weight: bold;">Sent:</span></b> Friday, May 3, 2013 2:14 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [DRBD-user] Enabling two primaries break connection<br> </font> </div> <div class="y_msg_container"><br><div id="yiv7290047574"><div dir="ltr">Hi,<div><br></div><div>I just re-tested using Wheezy (Linux 3.2.0-4-amd64 #1 SMP Debian 3.2.41-2 x86_64 GNU/Linux) and DRBD 8.4.3.</div><div style="">I couldn't reproduce the original bug (having one side writing, and toggling the other side between secondary/primary). However, if I try to write on the "toggling" side to the disk when in primary mode, I could still produce ProtocolError's.</div>
<div style="">As that's (fortunately) not required by Ganeti, we'll can probably ignore this (although I will test some more of our use-cases with DRBD 8.4.3).</div><div style=""><br></div><div style="">Can somebody confirm that the original behavior was a bug in DRBD 8.4.2 which was fixed in DRBD 8.4.3? Or could interactions with the kernel be the problem?</div>
<div style=""><br></div><div style="">Thanks,</div><div style="">Thomas</div></div><div class="yiv7290047574gmail_extra"><br><br><div class="yiv7290047574gmail_quote">On Fri, May 3, 2013 at 2:56 PM, Louis <span dir="ltr"><<a rel="nofollow" ymailto="mailto:mailtolouis2020-forum@yahoo.com" target="_blank" href="mailto:mailtolouis2020-forum@yahoo.com">mailtolouis2020-forum@yahoo.com</a>></span> wrote:<br>
<blockquote class="yiv7290047574gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div><div style="font-size:10pt;font-family:arial, helvetica, sans-serif;"><div><br><span></span></div><div style="font-style:normal;font-size:13.3333px;background-color:transparent;font-family:arial, helvetica, sans-serif;">
<br><span></span></div><div style="font-style:normal;font-size:13.3333px;background-color:transparent;font-family:arial, helvetica, sans-serif;"><span>Linux intel1 3.5.0-23-generic #35~precise1-Ubuntu SMP</span></div><div style="font-style:normal;font-size:13.3333px;background-color:transparent;font-family:arial, helvetica, sans-serif;">
<br><span></span></div><div style="font-style:normal;font-size:13.3333px;background-color:transparent;font-family:arial, helvetica, sans-serif;"><span></span></div><div><br><blockquote style="border-left:2px solid rgb(16,16,255);margin-left:5px;margin-top:5px;padding-left:5px;">
<div style="font-family:arial, helvetica, sans-serif;font-size:10pt;"> <div style="font-family:times new roman, new york, times, serif;font-size:12pt;"> <div dir="ltr"> <hr size="1"> <font face="Arial"> <b><span style="font-weight:bold;">From:</span></b> Luca Fornasari <<a rel="nofollow" ymailto="mailto:luca.fornasari@gmail.com" target="_blank" href="mailto:luca.fornasari@gmail.com">luca.fornasari@gmail.com</a>><br>
<b><span style="font-weight:bold;">To:</span></b> DRBD <<a rel="nofollow" ymailto="mailto:drbd-user@lists.linbit.com" target="_blank" href="mailto:drbd-user@lists.linbit.com">drbd-user@lists.linbit.com</a>> <br> <b><span style="font-weight:bold;">Sent:</span></b> Friday, May 3, 2013 1:01 PM<div>
<div class="yiv7290047574h5"><br> <b><span style="font-weight:bold;">Subject:</span></b> Re: [DRBD-user] Enabling two primaries break connection<br> </div></div></font> </div><div><div class="yiv7290047574h5"> <div><br><div><div dir="ltr">Hi Louis,<div>
<br></div><div>What kernel are yuo running?</div><div><br></div><div>Cheers,</div><div>Luca</div></div><div><br><br><div>On Fri, May 3, 2013 at 1:41 PM, Louis <span dir="ltr"><<a rel="nofollow" ymailto="mailto:mailtolouis2020-forum@yahoo.com" target="_blank" href="mailto:mailtolouis2020-forum@yahoo.com">mailtolouis2020-forum@yahoo.com</a>></span> wrote:<br>
<blockquote style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div><div style="font-size:10pt;font-family:arial, helvetica, sans-serif;"><div><span>Hi Thomas,</span></div><div style="font-style:normal;font-size:13.3333px;background-color:transparent;font-family:arial, helvetica, sans-serif;">
<br><span></span></div><div style="font-style:normal;font-size:13.3333px;background-color:transparent;font-family:arial, helvetica, sans-serif;">I just tested your scenario on DRBD 8.4.3. It seems fine, connection did not break.</div>
<div style="font-style:normal;font-size:13.3333px;background-color:transparent;font-family:arial, helvetica, sans-serif;">While doing the DD, I did change primary / secondary on bob node few times, but the connection never break.</div>
<div style="font-style:normal;font-size:13.3333px;background-color:transparent;font-family:arial, helvetica, sans-serif;"><br></div><div style="font-style:normal;font-size:13.3333px;background-color:transparent;font-family:arial, helvetica, sans-serif;">
The only thing I couldn't run this drbdadm --allow-two-primaries=yes <resource>, it give uknown command. But I do have allow-two-primaries setup in my drbd.conf, not sure that make any different?</div><div style="font-style:normal;font-size:13.3333px;background-color:transparent;font-family:arial, helvetica, sans-serif;">
<br><span></span></div><div style="font-style:normal;font-size:13.3333px;background-color:transparent;font-family:arial, helvetica, sans-serif;"><span></span></div><div>Regards</div><div>Louis<br><blockquote style="border-left:2px solid rgb(16,16,255);margin-left:5px;margin-top:5px;padding-left:5px;">
<div style="font-family:arial, helvetica, sans-serif;font-size:10pt;"> <div style="font-family:times new roman, new york, times, serif;font-size:12pt;"> <div dir="ltr"> <hr size="1"> <font face="Arial"> <b><span style="font-weight:bold;">From:</span></b> Thomas Thrainer <<a rel="nofollow" ymailto="mailto:thomasth@google.com" target="_blank" href="mailto:thomasth@google.com">thomasth@google.com</a>><br>
<b><span style="font-weight:bold;">To:</span></b> Luca Fornasari <<a rel="nofollow" ymailto="mailto:luca.fornasari@gmail.com" target="_blank" href="mailto:luca.fornasari@gmail.com">luca.fornasari@gmail.com</a>> <br><b><span style="font-weight:bold;">Cc:</span></b> <a rel="nofollow" ymailto="mailto:drbd-user@lists.linbit.com" target="_blank" href="mailto:drbd-user@lists.linbit.com">drbd-user@lists.linbit.com</a> <br>
<b><span style="font-weight:bold;">Sent:</span></b> Friday, May 3, 2013 10:00 AM<br> <b><span style="font-weight:bold;">Subject:</span></b> Re: [DRBD-user] Enabling two primaries break connection<br> </font> </div> <div><div>
<div><br><div><div dir="ltr">Hi,<div><br></div><div>Given the fact that I could reproduce the bug regularly, I'm pretty sure that this is indeed a DRBD bug. Unfortunately I didn't find a bugtracker on the DRBD site. Is there one? If not, what's the official way to report
bugs?</div>
<div><br></div><div>For the record, here are the steps to reproduce:</div><div> * create a device with primary on alice and secondary on bob</div><div> * on alice: while true; do dd if=/dev/zero of=/dev/drbd0; done</div>
<div> * on bob: drbdadm --allow-two-primaries=yes <resource>; drbdadm primary <resource></div><div> * you might have to drbdadm secondary <resource> on bob and then repeat the previous step in order to produce the bug</div>
<div><br></div><div>Log files are as mentioned in the first mail of the thread.</div><div><br></div><div>Cheers,</div><div>Thomas</div><div><br></div></div><div><br>
<br><div>On Tue, Apr 30, 2013 at 2:25 PM, Thomas Thrainer <span dir="ltr"><<a rel="nofollow" ymailto="mailto:thomasth@google.com" target="_blank" href="mailto:thomasth@google.com">thomasth@google.com</a>></span> wrote:<br><blockquote style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div dir="ltr">Hi Luca,<div><br></div><div>I just reproduced the exact same problem using only drbdadm. I also inspected the output of the -d option, and drbdadm does the exact same thing as Ganeti in this regard.</div><div>
<br></div><div>Thanks,</div><div>Thomas</div></div><div><div><div><br><br><div>On Tue, Apr 30, 2013 at 2:18 PM, Thomas Thrainer <span dir="ltr"><<a rel="nofollow" ymailto="mailto:thomasth@google.com" target="_blank" href="mailto:thomasth@google.com">thomasth@google.com</a>></span> wrote:<br>
<blockquote style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div dir="ltr"><div>Hi Luca,</div><div><br></div><div>I'll try the drbdadm method this as soon as I get to it. Right now I have no machines around which are already configured via drbdadm.</div>
<div><br></div><div>Note that I have included both logs (secondary and primary) in my first email.</div>
<div><br></div><div>I use DRBD 8.4.2 because 8.4.3 didn't compile against my kernel (3.2.27) and I didn't want to put much work into it. I this bug is known and fixed in 8.4.3, I'll might look into compiling against 3.2.27 again.</div>
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