[ovs-discuss] why 'ovs-vsctl add-port br dev' DO NOT check dev is really exist or not ?

ZY felix_zw at 126.com
Mon Apr 27 12:02:01 UTC 2015


Hi,
    I am testing ovs 2.3.1 in openstack; when i reboot machine, the network service in my VMs is not work any more until i restart the ovs service.


    Reproduce
    1.  VM-1 is binding with tap: tape502841a-f4
    2.  when machine reboot,  OVS service is down first and the info of tape502841a-f4  is store in ovs-db
    3.  libvirt destory the instance and delete  tape502841a-f4
    4.  machine start and bootup the OVS service,  OVS read the ovs-db and will add-port br-int  tape502841a-f4, but failed to add into datapath because  tape502841a-f4 is not create yet.
    5. libvirt start instance and create  tape502841a-f4
    6. the network service of instance is not work because of  tape502841a-f4 is not in datapath 


    This lead to the PORT is different between ovs-db and ovs-datapath, and i have to restart ovs service to make it work.
    I am wonder why OVS do not check the DEV is really exist in system first when run 'ovs-vsctl add-port BRIDGE DEV'  ?   and How to solve this problem?


thank you 
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