Re: [libvirt-users] libvirt-users Digest, Vol 18, Issue 11
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 2011/6/8 <libvirt-users-request@redhat.com>
Send libvirt-users mailing list submissions to libvirt-users@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@redhat.com
You can reach the person managing the list at libvirt-users-owner@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@gmail.com> To: libvirt-users@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@mail.gmail.com> 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@redhat.com>
Send libvirt-users mailing list submissions to libvirt-users@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@redhat.com
You can reach the person managing the list at libvirt-users-owner@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@gmail.com> To: libvirt-users@redhat.com Subject: [libvirt-users] libvirt-bin MOSTLY fails to create default virtual network Message-ID: <BANLkTinrE80HURSwJUUv28_v9HB9mRxNNw@mail.gmail.com> 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/20110606/54a07ab3/...
-------------- 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/20110606/54a07ab3/...
-------------- 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/20110606/54a07ab3/...
-------------- 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/20110606/54a07ab3/...
-------------- 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/20110606/54a07ab3/...
------------------------------
_______________________________________________ libvirt-users mailing list libvirt-users@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... URL: < https://www.redhat.com/archives/libvirt-users/attachments/20110608/625b332f/...
-------------- next part -------------- A non-text attachment was scrubbed... Name: LucidClusterStack.rar Type: application/rar Size: 4473008 bytes Desc: not available URL: < https://www.redhat.com/archives/libvirt-users/attachments/20110608/625b332f/...
------------------------------
_______________________________________________ libvirt-users mailing list libvirt-users@redhat.com https://www.redhat.com/mailman/listinfo/libvirt-users
End of libvirt-users Digest, Vol 18, Issue 11 *********************************************
On 06/09/11 - 07:11:22PM, m m wrote:
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
Please stop sending 6MB attachments out to the list; every person subscribed to the list has to download them. If you need to send someone a lot of information, upload it to a website somewhere and just send a link in email. Thanks, -- Chris Lalancette
participants (2)
-
Chris Lalancette -
m m