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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi Andreas/Jacobo,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">For one of my network failure tests, I drop all incoming and outgoing packets. I have also tested shutting down the eth interface, as you mentioned below, but
have run into DRBD split-brain issues, as I reported in separate mail to this list. I’d be interested to hear if you had any issues with your tests involving shutdown of the interface.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">For the node shutdown tests, I would include testing a node crash.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Tom<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";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""> Andreas Mock [mailto:andreas.mock@web.de]
<br>
<b>Sent:</b> 12 July 2013 10:31<br>
<b>To:</b> 'The Pacemaker cluster resource manager'<br>
<b>Subject:</b> Re: [Pacemaker] Simulating that a node is down.<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="DE" style="font-size:11.0pt;font-family:"Courier New";color:#1F497D">Hi Jacobo,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="DE" style="font-size:11.0pt;font-family:"Courier New";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="DE" style="font-size:11.0pt;font-family:"Courier New";color:#1F497D">1) corosync communicates through 2 ports, don't forget the second one.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="DE" style="font-size:11.0pt;font-family:"Courier New";color:#1F497D">2) IMHO, when you block both ports, it's like a classical split brain.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="DE" style="font-size:11.0pt;font-family:"Courier New";color:#1F497D">I've done it to test split brain and hopefully fencing behaviour.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="DE" style="font-size:11.0pt;font-family:"Courier New";color:#1F497D">´<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="DE" style="font-size:11.0pt;font-family:"Courier New";color:#1F497D">Best regards<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="DE" style="font-size:11.0pt;font-family:"Courier New";color:#1F497D">Andreas Mock<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="DE" style="font-size:11.0pt;font-family:"Courier New";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="DE" style="font-size:11.0pt;font-family:"Courier New";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="DE" style="font-size:11.0pt;font-family:"Courier New";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="DE" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">Von:</span></b><span lang="DE" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Jacobo García [mailto:jacobo.garcia@gmail.com]
<br>
<b>Gesendet:</b> Freitag, 12. Juli 2013 11:04<br>
<b>An:</b> The Pacemaker cluster resource manager<br>
<b>Betreff:</b> Re: [Pacemaker] Simulating that a node is down.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="DE"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="DE">Thanks Andreas for your kind answer, I'll add this to my test battery.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="DE"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="DE">Also, my other question, is it a good idea to close the corosync port? Should corosync behave in a expected way? I am getting odd behaviors on this one, but not sure if where to put the blame.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="DE"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="DE">Thanks in advance.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="DE"><br clear="all">
<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="DE">Jacobo García López de Araujo<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="DE"><a href="http://thebourbaki.com" target="_blank">http://thebourbaki.com</a> | <a href="http://twitter.com/clapkent" target="_blank">http://twitter.com/clapkent</a> <o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="DE"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="DE">On Thu, Jul 11, 2013 at 8:39 PM, Andreas Mock <<a href="mailto:andreas.mock@web.de" target="_blank">andreas.mock@web.de</a>> wrote:<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="DE" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi Jacobo,</span><span lang="DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="DE" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><span lang="DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="DE" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">one very interesting thing is missing.</span><span lang="DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="DE" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Overload the node. Make a programm/script which generates</span><span lang="DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="DE" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">many IO-operations, many flushes and meanwhile requesting</span><span lang="DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="DE" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">more and more memory from the OS until swapping begins.</span><span lang="DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="DE" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Ohhh, yes, swapping and IO is nice…</span><span lang="DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="DE" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><span lang="DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="DE" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">…then you can prove your monitor and stop action timeouts… ;-)</span><span lang="DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="DE" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><span lang="DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="DE" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Best regards</span><span lang="DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="DE" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Andreas Mock</span><span lang="DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="DE" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><span lang="DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="DE" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><span lang="DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span lang="DE" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">Von:</span></b><span lang="DE" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Jacobo García
[mailto:<a href="mailto:jacobo.garcia@gmail.com" target="_blank">jacobo.garcia@gmail.com</a>]
<br>
<b>Gesendet:</b> Donnerstag, 11. Juli 2013 19:14<br>
<b>An:</b> <a href="mailto:pacemaker@oss.clusterlabs.org" target="_blank">pacemaker@oss.clusterlabs.org</a><br>
<b>Betreff:</b> [Pacemaker] Simulating that a node is down.</span><span lang="DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="DE"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="DE">Hello,<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="DE"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="DE">I am looking for different ways of testing that a node is down. I am finding a strange behavior with one of them (closing with IPtables the UDP communication port).
I would like to know if closing the port is a recommended way of achieving my testing purposes. <o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="DE"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="DE">Also I would like to know other ways of testing apart from the ones compiled in the list below:<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="DE"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;line-height:15.0pt;background:#FBFBFB">
<span lang="DE" style="font-size:9.5pt;font-family:"Helvetica","sans-serif";color:#333333">1.</span><span lang="DE" style="font-size:7.0pt;color:#333333">
</span><span lang="DE" style="font-size:9.5pt;font-family:"Helvetica","sans-serif";color:#333333">Stopping corosync.</span><span lang="DE"><o:p></o:p></span></p>
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<span lang="DE" style="font-size:9.5pt;font-family:"Helvetica","sans-serif";color:#333333">2.</span><span lang="DE" style="font-size:7.0pt;color:#333333">
</span><span lang="DE" style="font-size:9.5pt;font-family:"Helvetica","sans-serif";color:#333333">Shutting down the node.</span><span lang="DE"><o:p></o:p></span></p>
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<span lang="DE" style="font-size:9.5pt;font-family:"Helvetica","sans-serif";color:#333333">3.</span><span lang="DE" style="font-size:7.0pt;color:#333333">
</span><span lang="DE" style="font-size:9.5pt;font-family:"Helvetica","sans-serif";color:#333333">Shutting down the eth0 interface.</span><span lang="DE"><o:p></o:p></span></p>
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<span lang="DE" style="font-size:9.5pt;font-family:"Helvetica","sans-serif";color:#333333">4.</span><span lang="DE" style="font-size:7.0pt;color:#333333">
</span><span lang="DE" style="font-size:9.5pt;font-family:"Helvetica","sans-serif";color:#333333">Killing corosync process.</span><span lang="DE"><o:p></o:p></span></p>
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<span lang="DE" style="font-size:9.5pt;font-family:"Helvetica","sans-serif";color:#333333">5.</span><span lang="DE" style="font-size:7.0pt;color:#333333">
</span><span lang="DE" style="font-size:9.5pt;font-family:"Helvetica","sans-serif";color:#333333">Closing the corosync communication port.</span><span lang="DE"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="DE">Thanks,<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="DE"><br clear="all">
<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="DE">Jacobo García López de Araujo<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="DE"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="DE"><br>
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Project Home: <a href="http://www.clusterlabs.org" target="_blank">http://www.clusterlabs.org</a><br>
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<p class="MsoNormal"><span lang="DE"><o:p> </o:p></span></p>
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