[libvirt-users] Help with Vrbr0
Gao feng
gaofeng at cn.fujitsu.com
Mon Nov 25 01:26:06 UTC 2013
On 11/22/2013 06:52 PM, Sherin A wrote:
> 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.
>
You are welcome :)
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