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<body class='hmmessage'><div dir='ltr'>I found the problem.. it's the latest kernel. I booted to grub and called up an older kernel (3.16.0-30-generic) and all behaves as advertised.<div><br></div><div>Now to fix it up so it always boots from the old kernel and we're back in business.</div><div><br></div><div><br><br><div><hr id="stopSpelling">Date: Fri, 13 Mar 2015 08:21:04 -0400<br>From: kb@2bits.com<br>To: kwlug-disc@kwlug.org<br>Subject: Re: [kwlug-disc] Problem reaching server<br><br><div dir="ltr"><div>Not sure if I was clear the first time or not.<br><br></div>Adding br0 is what caused my physical server to hang on reboot, though it worked fine until that.<br><br>This is NOT a solution to anything.<br></div><div class="ecxgmail_extra"><br><div class="ecxgmail_quote">On Fri, Mar 13, 2015 at 8:19 AM, CrankyOldBugger <span dir="ltr"><<a href="mailto:crankyoldbugger@gmail.com" target="_blank">crankyoldbugger@gmail.com</a>></span> wrote:<br><blockquote class="ecxgmail_quote" style="border-left:1px #ccc solid;padding-left:1ex;"><div dir="ltr">Ok, that was my mistake. I'll do the auto br0 tonight. Thanks for the idea.<br><br></div><div class="ecxHOEnZb"><div class="h5"><br><div class="ecxgmail_quote">On Fri, 13 Mar 2015 at 05:47 Khalid Baheyeldin <<a href="mailto:kb@2bits.com" target="_blank">kb@2bits.com</a>> wrote:<br><blockquote class="ecxgmail_quote" style="border-left:1px #ccc solid;padding-left:1ex;"><div dir="ltr"><div class="ecxgmail_extra"><div class="ecxgmail_quote">On Thu, Mar 12, 2015 at 11:14 PM, CrankyOldBugger <span dir="ltr"><<a href="mailto:crankyoldbugger@gmail.com" target="_blank">crankyoldbugger@gmail.com</a>></span> wrote:<br><blockquote class="ecxgmail_quote" style="border-left:1px #ccc solid;padding-left:1ex;"><div dir="ltr">That didn't seem to help. I commented out all of the lines below virbr0. Now I can't reach the VMs either.<br><br><div>By bridging, I assumed you mean virbr0, which we all worked so hard to set up a few weeks ago. </div></div></blockquote><div><br></div></div></div></div><div dir="ltr"><div class="ecxgmail_extra"><div class="ecxgmail_quote"><div>No. It was not virbr0.<br><br></div><div>It was:<br><br></div><div>auto br0<br></div><div>iface br0 inet dhcp<br></div><div> bridge_ports eth0<br><br></div><div>Again, I am using libvirt with kvm underneath, not any other virtualization stack.<br><br></div></div></div></div><div dir="ltr"><div class="ecxgmail_extra"><div class="ecxgmail_quote"><blockquote class="ecxgmail_quote" style="border-left:1px #ccc solid;padding-left:1ex;"><div dir="ltr"><div>I don't understand why I've been merrily rebooting since then but all of a sudden it starts to fail. Just weird.</div></div></blockquote><div><br></div></div></div></div><div dir="ltr"><div class="ecxgmail_extra"><div class="ecxgmail_quote"><div>In that case, it is a totally different problem. Mine never booted successfully. In your case, it seems intermittent.<br> <br></div></div></div></div><div dir="ltr"><div class="ecxgmail_extra"><div class="ecxgmail_quote"><blockquote class="ecxgmail_quote" style="border-left:1px #ccc solid;padding-left:1ex;"><div dir="ltr"><div><br></div><div>I'll fiddle with it some more tomorrow.</div><div><br></div></div><div><div><br><div class="ecxgmail_quote">On Thu, 12 Mar 2015 at 19:05 Khalid Baheyeldin <<a href="mailto:kb@2bits.com" target="_blank">kb@2bits.com</a>> wrote:<br><blockquote class="ecxgmail_quote" style="border-left:1px #ccc solid;padding-left:1ex;"><div dir="ltr"><div>That happened to me when I had bridging on the physical host that has virtualization. Things work, until you reboot, then server is not reachable.<br><br></div>I didn't figure out why, and ended up abandoning the bridge I added to /etc/network/interfaces, and using the default networking that is setup by libvirt.<br></div><div class="ecxgmail_extra"><br><div class="ecxgmail_quote"></div></div><div class="ecxgmail_extra"><div class="ecxgmail_quote">On Thu, Mar 12, 2015 at 6:51 PM, CrankyOldBugger <span dir="ltr"><<a href="mailto:crankyoldbugger@gmail.com" target="_blank">crankyoldbugger@gmail.com</a>></span> wrote:<br></div></div><div class="ecxgmail_extra"><div class="ecxgmail_quote"><blockquote class="ecxgmail_quote" style="border-left:1px #ccc solid;padding-left:1ex;"><div dir="ltr">I'm puzzled... I rebooted my Ubuntu server this morning (as updates needed a reboot) and now I can't reach it.<div><br></div><div>Here's what I determined:</div><div><br></div><div>It was running fine before the reboot!</div><div>I can't ping the server from another machine on the same subnet.</div><div>I can't SSH to the server.</div><div>SSH is running on the server.</div><div>I can't telnet to the server</div><div>I can ssh from the server to itself, so ssh is running and listening on 22.</div><div>If I try to ssh from another linux box on the same subnet, using either hostname or IP, I get "No route to host".</div><div>Traceroute should only one hop, that being the client I started traceroute from, but that line ends in !H, which I believe means can't connect.</div><div>IP address is fine.</div><div>I can't ping out from the server.</div><div>Now here's the fun part: I have two virtual machines hosted on this server, and they're both running fine. I can connect to them and they can connect to the internet.</div><div><br></div><div>Not sure what to think at this point. Anyone have any ideas?</div><div><br></div></div>
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<br></blockquote></div><br><br clear="all"><br>-- <br><div>Khalid M. Baheyeldin<br><a href="http://2bits.com" target="_blank">2bits.com</a>, Inc.<br>Fast Reliable Drupal<br>Drupal optimization, development, customization and consulting.<br>Simplicity is prerequisite for reliability. -- Edsger W.Dijkstra<br>Simplicity is the ultimate sophistication. -- Leonardo da Vinci<br>For every complex problem, there is an answer that is clear, simple, and wrong." -- H.L. Mencken<br></div>
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<br></blockquote></div></div></div><div dir="ltr"><div class="ecxgmail_extra"><br><br clear="all"><br>-- <br><div>Khalid M. Baheyeldin<br><a href="http://2bits.com" target="_blank">2bits.com</a>, Inc.<br>Fast Reliable Drupal<br>Drupal optimization, development, customization and consulting.<br>Simplicity is prerequisite for reliability. -- Edsger W.Dijkstra<br>Simplicity is the ultimate sophistication. -- Leonardo da Vinci<br>For every complex problem, there is an answer that is clear, simple, and wrong." -- H.L. Mencken<br></div>
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<br></blockquote></div><br><br clear="all"><br>-- <br><div class="ecxgmail_signature">Khalid M. Baheyeldin<br><a href="http://2bits.com" target="_blank">2bits.com</a>, Inc.<br>Fast Reliable Drupal<br>Drupal optimization, development, customization and consulting.<br>Simplicity is prerequisite for reliability. -- Edsger W.Dijkstra<br>Simplicity is the ultimate sophistication. -- Leonardo da Vinci<br>For every complex problem, there is an answer that is clear, simple, and wrong." -- H.L. Mencken<br></div>
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