[libvirt-users] Help with Vrbr0
Sherin A
sherin at syslint.com
Fri Nov 22 10:49:33 UTC 2013
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
--
--------------------------------------
Sherin A
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