Send libvirt-users mailing list submissions to libvirt-users(a)redhat.com To subscribe or unsubscribe via the World Wide Web, visit https://www.redhat.com/mailman/listinfo/libvirt-users or, via email, send a message with subject or body 'help' to libvirt-users-request(a)redhat.com You can reach the person managing the list at libvirt-users-owner(a)redhat.com When replying, please edit your Subject line so it is more specific than "Re: Contents of libvirt-users digest..." Today's Topics: 1. Re: libvirt-users Digest, Vol 18, Issue 7(libvirt-bin MOSTLY fails to create default virtual network) (m m) ---------------------------------------------------------------------- Message: 1 Date: Wed, 8 Jun 2011 08:28:19 -0500 From: m m <bk.praca(a)gmail.com&gt; To: libvirt-users(a)redhat.com Subject: Re: [libvirt-users] libvirt-users Digest, Vol 18, Issue 7(libvirt-bin MOSTLY fails to create default virtual network) Message-ID: <BANLkTikt49i78OJfzBgufoesv3C-Pjrdjw(a)mail.gmail.com&gt; Content-Type: text/plain; charset="iso-8859-1" I have attached all the logs (/var/log/dmesg, /var/log/libvirtd.log, /var/log/messages, /var/log/syslog, /var/log/boot.log and info about loaded modules /proc/modules) regarding scenatios1,2,3 (please see the README file for simple explanation what is there). By the way, I have installed only dnsmasq-bin (and not dnsmasq). Have a nice day 2011/6/6 <libvirt-users-request(a)redhat.com&gt; > Send libvirt-users mailing list submissions to > libvirt-users(a)redhat.com > > To subscribe or unsubscribe via the World Wide Web, visit > https://www.redhat.com/mailman/listinfo/libvirt-users > or, via email, send a message with subject or body 'help' to > libvirt-users-request(a)redhat.com > > You can reach the person managing the list at > libvirt-users-owner(a)redhat.com > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of libvirt-users digest..." > > > Today's Topics: > > 1. libvirt-bin MOSTLY fails to create default virtual network (m > m) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Mon, 6 Jun 2011 14:24:04 -0500 > From: m m <bk.praca(a)gmail.com&gt; > To: libvirt-users(a)redhat.com > Subject: [libvirt-users] libvirt-bin MOSTLY fails to create default > virtual network > Message-ID: <BANLkTinrE80HURSwJUUv28_v9HB9mRxNNw(a)mail.gmail.com&gt; > Content-Type: text/plain; charset="iso-8859-1" > > I have observed 3 scenarios after I reboot the host with 2 guests (which > are > supposed to autostart after boot/reboot of the host): > 1. Default network is created but I can not ping guests. Gests don't have > assigned IP address or they both have IP address 192.168.122.100. > 2. Default network is not created. > 3. Default netork is properly created and everything works fine. > In each case guests are started and they work properly. Cases 1. and 2. > happen a lot more often then case 3. > > My solutions: > - When I restart libvirt-bin then everything is fine. > - When I set 'sleep 40' in 'pre-start' section of > /etc/init/libvirt-bin.conf > and modify 'start on' section in the following way: > > start on (runlevel [2345] and net-device-up IFACE=br0) > > then everything works fine. > > > However, none of the above solutions indeed solves the problem. Please, let > me know if there is solution to this problem or what are your suggestions > regarding this issue. > > **** > HOST$ uname -a > Linux ras 2.6.32-32-server #62-Ubuntu SMP Wed Apr 20 22:07:43 UTC 2011 > x86_64 GNU/Linux > > GUEST1 and GUEST2 > $ uname -a > Linux server1-desktop 2.6.32-32-generic #62-Ubuntu SMP Wed Apr 20 21:54:21 > UTC 2011 i686 GNU/Linux > > HOST$ libvirtd --version > libvirtd (libvirt) 0.7.5 > > My idea was that some kernel modules sometimes are loaded before > libvirt-bin > starts, and sometimes libvirt-bin starts earlier, or in the middle of > loading of these modules, that is why 3 scenarios can be observed. > That is why I have added: > cp /proc/modules /home/wsadmin2/modules1 > cp /proc/modules /home/wsadmin2/modules2 > to 'pre-start' and 'post-start' parts respectively of > /etc/init/libvirt-bin.conf. > > Of course, beween execution of > - pre-start part > - exec /usr/sbin/libvirtd -d > - post-start part > other kernel modules can be loaded, so we can not be sure which additional > modules in file 'modules2' were indeed loaded before libvirtd was actually > started. > > Here are my observations: > Scenatio 1. > 33 (fixed) modules were logged - call them BASE MODULES. > > Scenatio 2. > Beside BASE MODULES + the following modules were loaded: > > > iptable_filter 1841 0 - Live 0xffffffffa007c000 > > ip_tables 18201 1 iptable_filter, Live 0xffffffffa0172000 > > x_tables 22361 1 ip_tables, Live 0xffffffffa0164000 > > Scenatio 3. > Beside BASE MODULES + the following modules were loaded: > > $ diff modules1 modules2 > 1c1,6 > < iptable_filter 1841 0 - Live 0xffffffffa008b000 > --- > > xt_state 1490 14 - Live 0xffffffffa01ab000 > > xt_tcpudp 2667 12 - Live 0xffffffffa01a5000 > > nf_conntrack_ipv4 12742 14 - Live 0xffffffffa019b000 > > nf_conntrack 73326 2 xt_state,nf_conntrack_ipv4, Live 0xffffffffa017d000 > > nf_defrag_ipv4 1481 1 nf_conntrack_ipv4, Live 0xffffffffa0177000 > > iptable_filter 1841 1 - Live 0xffffffffa008b000 > 3c8 > < x_tables 22361 1 ip_tables, Live 0xffffffffa0162000 > --- > > x_tables 22361 3 xt_state,xt_tcpudp,ip_tables, Live 0xffffffffa0162000 > > Other observations: > Scenatio 1. > No errors in libvirtd.log > Scenario 2. > > 10:06:06.980: error : networkAddIptablesRules:750 : failed to add iptables > rule to allow DHCP requests from 'virbr0': Invalid argument > (...) > 10:06:08.630: error : qemudNetworkIfaceConnect:1445 : Failed to add tap > interface to bridge 'virbr0': No such device > 10:06:08.630: error : qemuAutostartDomain:584 : Failed to autostart VM > 'cluster_server1': Failed to add tap interface to bridge 'virbr0': No such > device > > 10:06:08.921: info : qemudDispatchSignalEvent:390 : Received unexpected > signal 17 > 10:06:08.927: debug : virExecWithHook:617 : LC_ALL=C /usr/bin/kvm -help > 10:06:08.938: info : qemudDispatchSignalEvent:390 : Received unexpected > signal 17 > 10:06:09.000: error : qemudNetworkIfaceConnect:1445 : Failed to add tap > interface to bridge 'virbr0': No such device > 10:06:09.000: error : qemuAutostartDomain:584 : Failed to autostart VM > 'cluster_server2': Failed to add tap interface to bridge 'virbr0': No such > device > (...) > Scenatio 3. > No errors in libvirtd.log > > > I didn't see any valuable logs in /var/log/boot.log, /var/log/messages, > /var/log/syslog. Please let me know if you want to see them anyway or have > any suggestions right away. > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > https://www.redhat.com/archives/libvirt-users/attachments/20110606/54a07a... > > > -------------- next part -------------- > A non-text attachment was scrubbed... > Name: scenario1 > Type: application/octet-stream > Size: 19317 bytes > Desc: not available > URL: < > https://www.redhat.com/archives/libvirt-users/attachments/20110606/54a07a... > > > -------------- next part -------------- > A non-text attachment was scrubbed... > Name: scenario2 > Type: application/octet-stream > Size: 8294 bytes > Desc: not available > URL: < > https://www.redhat.com/archives/libvirt-users/attachments/20110606/54a07a... > > > -------------- next part -------------- > A non-text attachment was scrubbed... > Name: scenario3 > Type: application/octet-stream > Size: 2366 bytes > Desc: not available > URL: < > https://www.redhat.com/archives/libvirt-users/attachments/20110606/54a07a... > > > -------------- next part -------------- > A non-text attachment was scrubbed... > Name: libvirt-bin.conf > Type: application/octet-stream > Size: 924 bytes > Desc: not available > URL: < > https://www.redhat.com/archives/libvirt-users/attachments/20110606/54a07a... > > > > ------------------------------ > > _______________________________________________ > libvirt-users mailing list > libvirt-users(a)redhat.com > https://www.redhat.com/mailman/listinfo/libvirt-users > > End of libvirt-users Digest, Vol 18, Issue 7 > ******************************************** > -------------- next part -------------- An HTML attachment was scrubbed... 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