[libvirt-users] Help with Vrbr0
Sherin A
sherin at syslint.com
Fri Nov 22 10:52:02 UTC 2013
On Friday 22 November 2013 04:19 PM, Sherin A wrote:
> On Friday 22 November 2013 01:33 PM, Sherin A wrote:
>> On Friday 22 November 2013 01:24 PM, Gao feng wrote:
>>> On 11/22/2013 03:47 PM, Sherin A wrote:
>>>> Hello,
>>>>
>>>> I am not able to see vrbr0 in my box. Can some one help me
>>>> with this ? . I am trying KVM+libvirt and planing to use Routed
>>>> mode. I hope this virbr0 must be up for using this . I can give an
>>>> strace too.
>>>>
>>>> OS : Debian , kernel 3.12.0
>>>> libvrit version : 0.9.8
>>>> ____________________________________________________________________
>>>> root@:~# ifconfig
>>>> br0 Link encap:Ethernet HWaddr 4c:72:b9:32:32:86
>>>> inet addr:10.0.0.12 Bcast:10.0.0.255 Mask:255.255.255.0
>>>> inet6 addr: fe80::4e72:b9ff:fe32:3286/64 Scope:Link
>>>> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
>>>> RX packets:4523 errors:0 dropped:0 overruns:0 frame:0
>>>> TX packets:4068 errors:0 dropped:0 overruns:0 carrier:0
>>>> collisions:0 txqueuelen:0
>>>> RX bytes:2286336 (2.2 MB) TX bytes:411238 (411.2 KB)
>>>>
>>>> eth0 Link encap:Ethernet HWaddr 4c:72:b9:32:32:86
>>>> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
>>>> RX packets:17044 errors:0 dropped:0 overruns:0 frame:0
>>>> TX packets:14253 errors:0 dropped:0 overruns:0 carrier:0
>>>> collisions:0 txqueuelen:1000
>>>> RX bytes:12594945 (12.5 MB) TX bytes:1902456 (1.9 MB)
>>>> Interrupt:20 Memory:f7c00000-f7c20000
>>>>
>>>> lo Link encap:Local Loopback
>>>> inet addr:127.0.0.1 Mask:255.0.0.0
>>>> inet6 addr: ::1/128 Scope:Host
>>>> UP LOOPBACK RUNNING MTU:65536 Metric:1
>>>> RX packets:4 errors:0 dropped:0 overruns:0 frame:0
>>>> TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
>>>> collisions:0 txqueuelen:0
>>>> RX bytes:240 (240.0 B) TX bytes:240 (240.0 B)
>>>>
>>>> -------------------------------------------------------------------
>>>> root@:~# virsh net-start default
>>>> error: Failed to start network default
>>>> error: failed to add iptables rule to enable masquerading
>>>>
>>>> root@:~# virsh net-list --all
>>>> Name State Autostart
>>>> -----------------------------------------
>>>> default inactive yes
>>>>
>>>> root@:~# virsh net-start default
>>>> error: Failed to start network default
>>>> error: failed to add iptables rule to enable masquerading
>>>>
>>> seems like your kernel doesn't have ipt_MASQUERADE installed.
>>> try modprobe ipt_MASQUERADE
>>>
>> Hi Gao,
>>
>>
>> Yes , it looks like I am missing more module. I will recompile the
>> kernel and test more, the following is the reason behind this issue.
>>
>> root@:~# tail /var/log/libvirt/libvirtd.log
>> 2013-11-22 07:43:06.388+0000: 4328: error : virCommandWait:2192 :
>> internal error Child process (/sbin/iptables --table nat --insert
>> POSTROUTING --source 192.168.122.0/24 ! --destination
>> 192.168.122.0/24 --jump MASQUERADE) status unexpected: exit status 3
>> 2013-11-22 07:43:06.388+0000: 4328: error :
>> networkAddMasqueradingIptablesRules:966 : failed to add iptables rule
>> to enable masquerading
>>
>> root@:~# /sbin/iptables --table nat --insert POSTROUTING --source
>> 192.168.122.0/24 ! --destination 192.168.122.0/24 --jump MASQUERADE
>> iptables v1.4.12: can't initialize iptables table `nat': Table does
>> not exist (do you need to insmod?)
>> Perhaps iptables or your kernel needs to be upgraded.
>> root@# find /lib/modules/`uname -r` -iname "ipt*.ko"
>> /lib/modules/3.12.0-zilonus/kernel/net/ipv4/netfilter/ipt_ULOG.ko
>> /lib/modules/3.12.0-zilonus/kernel/net/ipv4/netfilter/ipt_REJECT.ko
>> /lib/modules/3.12.0-zilonus/kernel/net/ipv4/netfilter/iptable_raw.ko
>> /lib/modules/3.12.0-zilonus/kernel/net/ipv4/netfilter/iptable_filter.ko
>> /lib/modules/3.12.0-zilonus/kernel/net/ipv4/netfilter/ipt_CLUSTERIP.ko
>> /lib/modules/3.12.0-zilonus/kernel/net/ipv4/netfilter/ipt_ah.ko
>> /lib/modules/3.12.0-zilonus/kernel/net/ipv4/netfilter/iptable_mangle.ko
>> /lib/modules/3.12.0-zilonus/kernel/net/ipv4/netfilter/iptable_security.ko
>>
>> /lib/modules/3.12.0-zilonus/kernel/net/ipv4/netfilter/ipt_ECN.ko
>> root@~#
>> root at myhome:~# lsmod | grep ipt
>> ipt_REJECT 12541 0
>> iptable_mangle 12695 0
>> iptable_filter 12810 0
>> ip_tables 26952 2 iptable_mangle,iptable_filter
>> x_tables 29804 11
>> xt_physdev,ip6table_filter,ip6_tables,ebtables,xt_state,ipt_REJECT,xt_CHECKSUM,iptable_mangle,xt_tcpudp,iptable_filter,ip_tables
>> root@:~# modinfo iptable_nat
>> ERROR: modinfo: could not find module iptable_nat
>> root@:~#
>>
>> I will compile the kernel and get back soon.
>>
>
> I fixed the iptable issue . But it is still not showing vrbr0 . Now
> it shows the following error ,
> root at myhome:~# virsh net-list --all
> Name State Autostart
> -----------------------------------------
> default inactive yes
>
> root at myhome:~# virsh net-start default
> error: Failed to start network default
> error: internal error Child process (/usr/sbin/dnsmasq -u
> libvirt-dnsmasq --strict-order --bind-interfaces
> --pid-file=/var/run/libvirt/network/default.pid --conf-file=
> --except-interface lo --listen-address 192.168.122.1 --dhcp-range
> 192.168.122.2,192.168.122.254
> --dhcp-leasefile=/var/lib/libvirt/dnsmasq/default.leases
> --dhcp-lease-max=253 --dhcp-no-override) status unexpected: exit status 2
>
>
> 2013-11-22 10:42:51.113+0000: 1288: error : virCommandWait:2192 :
> internal error Child process (/usr/sbin/dnsmasq -u libvirt-dnsmasq
> --strict-order --bind-interfaces
> --pid-file=/var/run/libvirt/network/default.pid --conf-file=
> --except-interface lo --listen-address 192.168.122.1 --dhcp-range
> 192.168.122.2,192.168.122.254
> --dhcp-leasefile=/var/lib/libvirt/dnsmasq/default.leases
> --dhcp-lease-max=253 --dhcp-no-override) status unexpected: exit status 2
>
I fixed this too , there was a multiple instance of dnsmasq making this
mess, I killed it and removed the autostart too. that fixed the issue,
Now vrbr0 is up
oot at myhome:~# ps aux | grep mask
root 3135 0.0 0.0 13584 924 pts/0 S+ 16:19 0:00 grep
--color=auto mask
root at myhome:~# ps aux | grep dns
dnsmasq 1196 0.0 0.0 33020 1016 ? S 16:10 0:00
/usr/sbin/dnsmasq -x /var/run/dnsmasq/dnsmasq.pid -u dnsmasq -r
/var/run/dnsmasq/resolv.conf -7
/etc/dnsmasq.d,.dpkg-dist,.dpkg-old,.dpkg-new
134 2749 0.0 0.0 33024 1032 ? S 16:15 0:00
/usr/sbin/dnsmasq -u libvirt-dnsmasq --strict-order --bind-interfaces
--pid-file=/var/run/libvirt/network/default.pid --conf-file=
--except-interface lo --listen-address 192.168.122.1 --dhcp-range
192.168.122.2,192.168.122.254
--dhcp-leasefile=/var/lib/libvirt/dnsmasq/default.leases
--dhcp-lease-max=253 --dhcp-no-override
134 2807 0.0 0.0 33024 1028 ? S 16:16 0:00
/usr/sbin/dnsmasq -u libvirt-dnsmasq --strict-order --bind-interfaces
--pid-file=/var/run/libvirt/network/default.pid --conf-file=
--except-interface lo --listen-address 192.168.122.1 --dhcp-range
192.168.122.2,192.168.122.254
--dhcp-leasefile=/var/lib/libvirt/dnsmasq/default.leases
--dhcp-lease-max=253 --dhcp-no-override
root 3137 0.0 0.0 13588 928 pts/0 S+ 16:20 0:00 grep
--color=auto dns
root at myhome:~# pkill -9 dnsmasq
root at myhome:~# ps aux | grep dns
root 3140 0.0 0.0 13584 928 pts/0 S+ 16:20 0:00 grep
--color=auto dns
root at myhome:~# virsh net-start default
Network default started
root at myhome:~# ifconfig
br0 Link encap:Ethernet HWaddr 4c:72:b9:32:32:86
inet addr:10.0.0.12 Bcast:10.0.0.255 Mask:255.255.255.0
inet6 addr: fe80::4e72:b9ff:fe32:3286/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1428 errors:0 dropped:0 overruns:0 frame:0
TX packets:1517 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1400480 (1.4 MB) TX bytes:194878 (194.8 KB)
eth0 Link encap:Ethernet HWaddr 4c:72:b9:32:32:86
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1847 errors:0 dropped:0 overruns:0 frame:0
TX packets:1525 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1496510 (1.4 MB) TX bytes:203001 (203.0 KB)
Interrupt:20 Memory:f7c00000-f7c20000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:4 errors:0 dropped:0 overruns:0 frame:0
TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:240 (240.0 B) TX bytes:240 (240.0 B)
virbr0 Link encap:Ethernet HWaddr 16:ea:84:8f:53:c8
inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
root at myhome:~# update-rc.d -f dnsmasq remove
Removing any system startup links for /etc/init.d/dnsmasq ...
/etc/rc0.d/K85dnsmasq
/etc/rc1.d/K85dnsmasq
/etc/rc2.d/S15dnsmasq
/etc/rc3.d/S15dnsmasq
/etc/rc4.d/S15dnsmasq
/etc/rc5.d/S15dnsmasq
/etc/rc6.d/K85dnsmasq
root at myhome:~#
Thank you for your help.
--
--------------------------------------
Sherin A
Syslint Technologies
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