Recreate OVZ panic with OVS-trunk on Debian 6 (Squeeze) 2.6.32-5-openvz-amd64

ovsKernPanic

## System Config
uname -a
	Linux ovz04 2.6.32-5-openvz-amd64 #1 SMP Mon Mar 7 22:25:57 UTC 2011 x86_64 GNU/Linux

cat /etc/network/interfaces
	auto lo
	iface lo inet loopback
	
	allow-hotplug eth0
	iface eth0 inet static
		address 10.210.4.20
		netmask 255.255.255.0
		gateway 10.210.4.254

	allow-hotplug eth1
	iface eth1 inet manual

cat /etc/sysctl.conf
	kernel.sysrq                                    = 1

	net.ipv4.icmp_echo_ignore_broadcasts            = 1

	net.ipv4.conf.default.rp_filter                 = 1
	net.ipv4.conf.all.rp_filter                     = 1

	net.ipv4.conf.default.forwarding                = 1
	net.ipv4.conf.default.proxy_arp                 = 1
	net.ipv4.conf.default.send_redirects            = 1
	net.ipv4.conf.all.send_redirects                = 0
	net.ipv4.conf.all.secure_redirects              = 0

	net.ipv4.ip_forward                             = 1
	net.ipv6.conf.all.forwarding                    = 2



## Build kernel modules from trunk
./boot.sh
./configure --with-l26=/lib/modules/`uname -r`/build
make
make install



## Start OVS
lsmod | grep bridge # rmmod bridge if enabled

insmod datapath/linux-2.6/openvswitch_mod.ko
mkdir -p /usr/local/etc/openvswitch
ovsdb-tool create /usr/local/etc/openvswitch/conf.db vswitchd/vswitch.ovsschema
ovsdb-server /usr/local/etc/openvswitch/conf.db --remote=punix:/usr/local/var/run/openvswitch/db.sock --remote=db:Open_vSwitch,manager_options --pidfile --detach
ovs-vsctl --no-wait init
ovs-vswitchd unix:/usr/local/var/run/openvswitch/db.sock --pidfile --detach

ps aux | grep ovs
	root      9976  0.0  0.0  21428  1768 ?        Ss   12:18   0:00 ovsdb-server /usr/local/etc/openvswitch/conf.db --remote=punix:/usr/local/var/run/openvswitch/db.sock --remote=db:Open_vSwitch,manager_options --pidfile --detach
	root      9979  0.0  0.0  21864  1340 ?        Ss   12:18   0:00 ovs-vswitchd unix:/usr/local/var/run/openvswitch/db.sock --pidfile --detach
	root      9981  0.0  0.0   7544   820 pts/0    S+   12:18   0:00 grep ovs



## Start brcompatd
insmod datapath/linux-2.6/brcompat_mod.ko
ovs-brcompatd --pidfile --detach -vANY:console:EMER unix:/usr/local/var/run/openvswitch/db.sock

ps aux | grep brcompatd
	root      9985  0.0  0.0  21664  1064 ?        Ss   12:19   0:00 ovs-brcompatd --pidfile --detach -vANY:console:EMER unix:/usr/local/var/run/openvswitch/db.sock
	root      9987  0.0  0.0   7544   824 pts/0    S+   12:20   0:00 grep brcompatd



## Create bridge:
brctl addbr vbr0
brctl addif vbr0 eth1

brctl show
	bridge name	bridge id		STP enabled	interfaces
	vbr0		0000.00188b3ed188	no		eth1



## Join container to bridge vbr0
vzctl set 100 --netif_add eth0,,,,vbr0 --save
brctl addif vbr0 veth100.0
brctl show
	bridge name	bridge id		STP enabled	interfaces
	vbr0		0000.001851241854	no		eth1
							veth100.0

vzctl exec 100 'cat /etc/network/interfaces'
	auto lo
	iface lo inet loopback

	allow-hotplug eth0
	iface eth0 inet static
		address 10.210.4.22
		netmask 255.255.255.0

ping 10.210.4.22
	Request timeout for icmp_seq 0
	Request timeout for icmp_seq 1
	^C



## Remove container from bridge vbr0
brctl delif vbr0 veth100.0

brctl show
	bridge name	bridge id		STP enabled	interfaces
	vbr0		0000.001851241854	no		eth1



## Add vbr0 config to /etc/network/interfaces
cat /etc/network/interfaces
	auto lo
	iface lo inet loopback
	
	allow-hotplug eth0
	iface eth0 inet static
		address 10.210.4.20
		netmask 255.255.255.0
		gateway 10.210.4.254

	allow-hotplug eth1
	iface eth1 inet manual

	auto vbr0
	iface vbr0 inet static
		address 10.210.4.21
		netmask 255.255.255.0
		bridge_ports eth1
		bridge_stp off
		bridge_fd 0

ifup vbr0

ping 10.210.4.21
	PING 10.210.4.253 (10.210.4.253): 56 data bytes
	64 bytes from 10.210.4.21: icmp_seq=0 ttl=254 time=1.627 ms
	64 bytes from 10.210.4.21: icmp_seq=1 ttl=254 time=1.571 ms
	64 bytes from 10.210.4.21: icmp_seq=2 ttl=254 time=1.548 ms



## Add container to bridge vbr0
ifdown vbr0
brctl addif vbr0 veth100.0

brctl show
	bridge name	bridge id		STP enabled	interfaces
	vbr0		0000.001851241854	no		eth1
								veth100.0

ifup vbr0
	Waiting for vbr0 to get ready (MAXWAIT is 2 seconds).

	Message from syslogd@ovz04 at May  6 12:32:30 ...
	 kernel:[ 2231.505024] Oops: 0010 [#1] SMP 

	Message from syslogd@ovz04 at May  6 12:32:30 ...
	 kernel:[ 2231.533288] last sysfs file: /sys/devices/virtual/net/veth100.0/brport/hold_timer

	Message from syslogd@ovz04 at May  6 12:32:30 ...
	 kernel:[ 2231.533288] Stack:

	Message from syslogd@ovz04 at May  6 12:32:30 ...
	 kernel:[ 2231.533288] Call Trace:

	Message from syslogd@ovz04 at May  6 12:32:30 ...
	 kernel:[ 2231.533288] Code:  Bad RIP value.

	Message from syslogd@ovz04 at May  6 12:32:30 ...
	 kernel:[ 2231.533288] CR2: 0000000000000000

	Message from syslogd@ovz04 at May  6 12:32:30 ...
	 kernel:[ 2232.291689] Kernel panic - not syncing: Fatal exception in interrupt