<html><head><meta http-equiv="Content-Type" content="text/html charset=UTF-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><br class=""><div><blockquote type="cite" class=""><div class="">On 6. nov. 2015, at 08.42, Jan Friesse <<a href="mailto:jfriesse@redhat.com" class="">jfriesse@redhat.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><a href="mailto:user.clusterlabs.org@siimnet.dk" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">user.clusterlabs.org@siimnet.dk</a><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class=""><span class="Apple-converted-space"> </span>napsal(a):</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><blockquote type="cite" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">Been new to pacemaker, Im trying to create my first cluster of two nodes, but it seems to behave a little strange.<br class="">Following this guide:<span class="Apple-converted-space"> </span><a href="http://clusterlabs.org/quickstart-redhat-6.html" class="">http://clusterlabs.org/quickstart-redhat-6.html</a><span class="Apple-converted-space"> </span><<a href="http://clusterlabs.org/quickstart-redhat-6.html" class="">http://clusterlabs.org/quickstart-redhat-6.html</a>><br class=""><br class="">but am unable to do f.ex.:<br class=""><br class="">[root@afnA ~]# pcs property set stonith-enabled=false<br class="">Error: Unable to update cib<br class="">Call cib_replace failed (-62): Timer expired<br class=""><br class=""><br class="">only thing I find in logs are continued corosync events:<br class=""><br class="">Nov 06 01:30:54 corosync [TOTEM ] Retransmit List: 96 97<br class="">Nov 06 01:30:56 corosync [TOTEM ] Retransmit List: 96 97<br class="">Nov 06 01:30:57 corosync [TOTEM ] Retransmit List: 96 97<br class="">Nov 06 01:30:59 corosync [TOTEM ] Retransmit List: 96 97<br class="">Nov 06 01:31:01 corosync [TOTEM ] Retransmit List: 96 97<br class=""></blockquote><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">This means something is blocking successful delivery of packets. Make sure to:</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">- Properly configure firewall (for testing you can disable it completely)</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">- Make sure you have properly configured multicast. As alternative, you can try udpu. Udpu is usually better compatible with switches and for two node use case performance is same.</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""></div></blockquote>Found this thread: <a href="http://www.gossamer-threads.com/lists/linuxha/pacemaker/90203" class="">http://www.gossamer-threads.com/lists/linuxha/pacemaker/90203</a></div><div><br class=""></div>It seems that multicast between my two KVM nodes stops after 180s:<div class=""><br class=""></div><div class=""><div class="">afnA : unicast, seq=178, size=69 bytes, dist=0, time=0.238ms</div><div class="">afnA : multicast, seq=178, size=69 bytes, dist=0, time=0.324ms</div><div class="">afnA : unicast, seq=179, size=69 bytes, dist=0, time=0.243ms</div><div class="">afnA : multicast, seq=179, size=69 bytes, dist=0, time=0.313ms</div><div class="">afnA : unicast, seq=180, size=69 bytes, dist=0, time=0.273ms</div><div class="">afnA : unicast, seq=181, size=69 bytes, dist=0, time=0.449ms</div><div class="">afnA : unicast, seq=182, size=69 bytes, dist=0, time=0.266ms</div><div class="">afnA : unicast, seq=183, size=69 bytes, dist=0, time=0.367ms</div></div><div class=""><br class=""></div><div class="">I can then just restart omping and get another 180s of multicasting… hmm might this have anything to do with the open vswitch used between nodes… seem to remember to have read about issues with open vswitches and multicasting, will dig more…</div><div class=""><br class=""></div><div class="">Meanwhile since I only have two nodes cluster, how do I configure it to do unicast in /etc/cluster/cluster,conf, as cman stack doesn’t use /etc/corosync/corosync.conf (have test with skewed malfunction corosync.conf, cman still forms quorum initially)?</div><div class=""><br class=""></div><div class="">TIA</div><div class=""><br class=""></div></body></html>