[ovs-discuss] bridge renaming issue with Xen

Lee, Jeongkeun jklee at hp.com
Thu Mar 25 04:36:05 UTC 2010


Hi Ben and Jesse,

I'm trying to use ovs 0.99.2 with Xen on Lenny. 
As you know, Xen calls 'ip link set' commands to rename a bridge but ovs-brcompatd does not proxy 'ip link set name' command.

> From: "Jesse Gross" <jesse at nicira.com>
> 
> Earlier versions of Xen networking (which apparently the Lenny port is 
> based
> on) used some "interesting" tricks with renaming. In this case eth0 is 
> renamed to peth0 and a bridge named tmpbridge is created then renamed 
> to eth0.

With the previous version of ovs that doesn't use OVSDB, I simply changed the bridge name directly on the ovs/brcompatd config file by modifying Xen networking scripts as follows:

    ...
    ip link set ${tdev} name ${bridge}
    # ovs-brcompatd does not proxy 'ip link set name' command
    # need to manually change the bridge name in the ovs config file
    # usually tdev=tmpbridge, bridge=eth0
    sed -i "s/${tdev}/${bridge}/g" /etc/ovs-vswitchd-xen.conf  <- added line
    ...

So, the same renaming should be done on the config DB with ovs 0.99.2 and I tried the following 'ovs-vsctl set' commands:
    
    ip link set ${tdev} name ${bridge}
    # sed -i "s/${tdev}/${bridge}/g" ${cfg}
    # usually tdev=tmpbridge, bridge=eth0
    /usr/local/bin/ovs-vsctl set Bridge ${tdev} name=${bridge}
    /usr/local/bin/ovs-vsctl set Port ${tdev} name=${bridge}
    /usr/local/bin/ovs-vsctl set Interface ${tdev} name=${bridge}

Then, after finishing booting, 'brctl show' and 'ovs-dpctl show' look fine in dom0 but generating any packets from domU crashes the system and dom0 automatically reboots. Syslog caught warning and error messages shown below. It seems like 'ovs-vsctl set' does more than just renaming DB entries. Can you help me to find the right use of this command? maybe the order between Bridge, Port, and Interface renaming matters..?



~~~~~~~~~~~~~~~~~~~ SYSLOG dump ~~~~~~~~~~~~~~~~~~~~~~~~~
Mar 24 20:14:52 majuan ovs-vsctl: 00001|vsctl|INFO|Called as /usr/local/bin/ovs-vsctl set Bridge tmpbridge name=eth0
Mar 24 20:14:52 majuan ovsdb-server: 00009|reconnect|INFO|unix:/tmp/stream-unix.4694.0: connecting...
Mar 24 20:14:52 majuan ovsdb-server: 00010|reconnect|INFO|unix:/tmp/stream-unix.4694.0: connected
Mar 24 20:14:52 majuan ovs-brcompatd: 00003|brcompatd|INFO|kernel reported network device eth0 removed but a device by that name exists (XS Tools 5.0.0?)
Mar 24 20:14:52 majuan ovs-vswitchd: 00010|dpif|WARN|system at dp0: flow_flush failed (No such device)
Mar 24 20:14:52 majuan ovs-vswitchd: 00011|ofproto|INFO|using datapath ID 000000232099dc82
Mar 24 20:14:52 majuan ovs-vswitchd: 00012|bridge|INFO|created bridge eth0 on system at dp0
Mar 24 20:14:52 majuan ovs-vswitchd: 00013|bridge|INFO|created port tmpbridge on bridge eth0
Mar 24 20:14:52 majuan ovs-vswitchd: 00014|netdev|WARN|failed to get flags for network device tmpbridge: No such device
Mar 24 20:14:52 majuan ovs-vswitchd: 00015|bridge|WARN|could not create iface tmpbridge: No such device
Mar 24 20:14:52 majuan ovs-vswitchd: 00016|dpif|WARN|system at dp0: failed to add tmpbridge as port: No such device
Mar 24 20:14:52 majuan ovs-vswitchd: 00017|bridge|ERR|failed to add tmpbridge interface to system at dp0: No such device
Mar 24 20:14:52 majuan ovs-vswitchd: 00018|netdev|WARN|failed to get flags for network device tmpbridge: No such device
Mar 24 20:14:52 majuan ovs-vswitchd: 00019|bridge|WARN|could not open netdev on tmpbridge, dropping: No such device
Mar 24 20:14:52 majuan ovs-vswitchd: 00020|bridge|ERR|tmpbridge port has no interfaces, dropping
Mar 24 20:14:52 majuan ovs-vswitchd: 00021|bridge|WARN|bridge eth0: using default bridge Ethernet address 00:23:20:cf:19:dc
Mar 24 20:14:52 majuan ovs-vswitchd: 00022|ofproto|INFO|datapath ID changed to 0000002320cf19dc
Mar 24 20:14:52 majuan ovs-vswitchd: 00023|netdev|WARN|attempted to create a device that may not be created: eth0
Mar 24 20:14:52 majuan ovs-vswitchd: 00024|ofproto|WARN|ignoring port eth0 (0) because netdev eth0 cannot be opened (No such device)
Mar 24 20:14:52 majuan ovsdb-server: 00011|jsonrpc|INFO|unix:/tmp/stream-unix.4694.0: connection closed
Mar 24 20:14:52 majuan ovsdb-server: 00012|reconnect|INFO|unix:/tmp/stream-unix.4694.0: connection dropped
Mar 24 20:14:52 majuan ovs-vswitchd: 00025|netdev|WARN|attempted to create a device that may not be created: eth0
Mar 24 20:14:52 majuan ovs-vswitchd: 00026|ofproto|WARN|ignoring port eth0 (0) because netdev eth0 cannot be opened (No such device)
Mar 24 20:14:52 majuan ovs-vswitchd: 00027|bridge|INFO|created port tmpbridge on bridge eth0

Mar 24 20:14:52 majuan ovs-vsctl: 00001|vsctl|INFO|Called as /usr/local/bin/ovs-vsctl set Port tmpbridge name=eth0
Mar 24 20:14:52 majuan ovsdb-server: 00013|reconnect|INFO|unix:/tmp/stream-unix.4712.0: connecting...
Mar 24 20:14:52 majuan ovsdb-server: 00014|reconnect|INFO|unix:/tmp/stream-unix.4712.0: connected
Mar 24 20:14:52 majuan ovs-vswitchd: 00028|netdev|WARN|failed to get flags for network device tmpbridge: No such device
Mar 24 20:14:52 majuan ovs-vswitchd: 00029|bridge|WARN|could not create iface tmpbridge: No such device
Mar 24 20:14:52 majuan ovs-vswitchd: 00030|dpif|WARN|system at dp0: failed to add tmpbridge as port: No such device
Mar 24 20:14:52 majuan ovs-vswitchd: 00031|bridge|ERR|failed to add tmpbridge interface to system at dp0: No such device
Mar 24 20:14:52 majuan ovs-vswitchd: 00032|netdev|WARN|failed to get flags for network device tmpbridge: No such device
Mar 24 20:14:52 majuan ovs-vswitchd: 00033|bridge|WARN|could not open netdev on tmpbridge, dropping: No such device
Mar 24 20:14:52 majuan ovs-vswitchd: 00034|bridge|ERR|tmpbridge port has no interfaces, dropping
Mar 24 20:14:52 majuan ovs-vswitchd: 00035|bridge|WARN|bridge eth0: using default bridge Ethernet address 00:23:20:cf:19:dc
Mar 24 20:14:52 majuan ovs-vswitchd: 00036|netdev|WARN|attempted to create a device that may not be created: eth0
Mar 24 20:14:52 majuan ovs-vswitchd: 00037|ofproto|WARN|ignoring port eth0 (0) because netdev eth0 cannot be opened (No such device)
Mar 24 20:14:52 majuan ovs-vswitchd: 00038|bridge|INFO|created port eth0 on bridge eth0
Mar 24 20:14:52 majuan ovs-vswitchd: 00039|netdev|WARN|failed to get flags for network device tmpbridge: No such device
Mar 24 20:14:52 majuan ovs-vswitchd: 00040|bridge|WARN|could not create iface tmpbridge: No such device
Mar 24 20:14:52 majuan ovs-vswitchd: 00041|dpif|WARN|system at dp0: failed to add tmpbridge as port: No such device
Mar 24 20:14:52 majuan ovs-vswitchd: 00042|bridge|ERR|failed to add tmpbridge interface to system at dp0: No such device
Mar 24 20:14:52 majuan ovs-vswitchd: 00043|netdev|WARN|failed to get flags for network device tmpbridge: No such device
Mar 24 20:14:52 majuan ovs-vswitchd: 00044|bridge|WARN|could not open netdev on tmpbridge, dropping: No such device
Mar 24 20:14:52 majuan ovs-vswitchd: 00045|bridge|ERR|eth0 port has no interfaces, dropping
Mar 24 20:14:52 majuan ovs-vswitchd: 00046|bridge|WARN|bridge eth0: using default bridge Ethernet address 00:23:20:cf:19:dc
Mar 24 20:14:52 majuan ovs-vswitchd: 00047|netdev|WARN|attempted to create a device that may not be created: eth0
Mar 24 20:14:52 majuan ovs-vswitchd: 00048|ofproto|WARN|ignoring port eth0 (0) because netdev eth0 cannot be opened (No such device)
Mar 24 20:14:52 majuan ovsdb-server: 00015|jsonrpc|INFO|unix:/tmp/stream-unix.4712.0: connection closed
Mar 24 20:14:52 majuan ovsdb-server: 00016|reconnect|INFO|unix:/tmp/stream-unix.4712.0: connection dropped
Mar 24 20:14:52 majuan ovs-vswitchd: 00049|netdev|WARN|attempted to create a device that may not be created: eth0
Mar 24 20:14:52 majuan ovs-vswitchd: 00050|ofproto|WARN|ignoring port eth0 (0) because netdev eth0 cannot be opened (No such device)
Mar 24 20:14:52 majuan ovs-vswitchd: 00051|bridge|INFO|created port eth0 on bridge eth0

Mar 24 20:14:52 majuan ovs-vsctl: 00001|vsctl|INFO|Called as /usr/local/bin/ovs-vsctl set Interface tmpbridge name=eth0
Mar 24 20:14:52 majuan ovsdb-server: 00017|reconnect|INFO|unix:/tmp/stream-unix.4721.0: connecting...
Mar 24 20:14:52 majuan ovsdb-server: 00018|reconnect|INFO|unix:/tmp/stream-unix.4721.0: connected
Mar 24 20:14:52 majuan ovs-vswitchd: 00052|netdev|WARN|failed to get flags for network device tmpbridge: No such device
Mar 24 20:14:52 majuan ovs-vswitchd: 00053|bridge|WARN|could not create iface tmpbridge: No such device
Mar 24 20:14:52 majuan ovs-vswitchd: 00054|dpif|WARN|system at dp0: failed to add tmpbridge as port: No such device
Mar 24 20:14:52 majuan ovs-vswitchd: 00055|bridge|ERR|failed to add tmpbridge interface to system at dp0: No such device
Mar 24 20:14:52 majuan ovs-vswitchd: 00056|netdev|WARN|failed to get flags for network device tmpbridge: No such device
Mar 24 20:14:52 majuan ovs-vswitchd: 00057|bridge|WARN|could not open netdev on tmpbridge, dropping: No such device
Mar 24 20:14:52 majuan ovs-vswitchd: 00058|bridge|ERR|eth0 port has no interfaces, dropping
Mar 24 20:14:52 majuan ovs-vswitchd: 00059|bridge|WARN|bridge eth0: using default bridge Ethernet address 00:23:20:cf:19:dc
Mar 24 20:14:52 majuan ovs-vswitchd: 00060|netdev|WARN|attempted to create a device that may not be created: eth0
Mar 24 20:14:52 majuan ovs-vswitchd: 00061|bridge|INFO|created port eth0 on bridge eth0
Mar 24 20:14:52 majuan ovs-vswitchd: 00062|bridge|WARN|bridge eth0: using default bridge Ethernet address 00:23:20:cf:19:dc
Mar 24 20:14:52 majuan ovs-vswitchd: 00063|bridge|WARN|bridge eth0: using default bridge Ethernet address 00:23:20:cf:19:dc
Mar 24 20:14:52 majuan ovsdb-server: 00019|jsonrpc|INFO|unix:/tmp/stream-unix.4721.0: connection closed
Mar 24 20:14:52 majuan ovsdb-server: 00020|reconnect|INFO|unix:/tmp/stream-unix.4721.0: connection dropped
Mar 24 20:14:55 majuan ovs-vswitchd: 00064|bridge|INFO|created port peth0 on bridge eth0
Mar 24 20:14:55 majuan ovs-vswitchd: 00065|ofproto|INFO|datapath ID changed to 000018a905162754
Mar 24 20:14:55 majuan ovs-brcompatd: 00004|brcompatd|INFO|add-if eth0 peth0: Success








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