[GitHub] [cloudstack] wido commented on pull request #4740: get_bridge_physdev returns "device:" instead of "device"

[GitBox <gi...@apache.org>]

wido commented on pull request #4740:
URL: https://github.com/apache/cloudstack/pull/4740#issuecomment-789575625


   @rhtyd I would like to stress that this issue also occurs on Ubuntu 18.04 systems and not only on 20.04 as @weizhouapache mentioned in the original commit.
   
   Two Ubuntu 18.04 systems running with VXLAN:
   
   <pre>
   root@hv-138-e14-33:~# bridge -o link show | grep vxlan500
   28: vxlan500 state UNKNOWN : <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master brvx-500 state forwarding priority 32 cost 100 
   </pre>
   
   <pre>
   root@hv-138-e14-25:~# bridge -o link show | grep vxlan500
   9: vxlan500: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master brvx-500 state forwarding priority 32 cost 100 
   </pre>
   
   I checked their kernels:
   <pre>
   Linux hv-138-e14-33.ams02.cldin.net 5.4.0-60-generic
   Linux hv-138-e14-25.ams02.cldin.net 5.4.0-66-generic
   
   Distributor ID:	Ubuntu
   Description:	Ubuntu 18.04.5 LTS
   Release:	18.04
   Codename:	bionic
   </pre>
   
   This causes Instance to **loose** their network connectivity after a initial boot or migration.
   
   A very small fix which prevents major issues for (end-)users.
   
   I would urge to merge this in 4.13 and then 4.14 so that we can release 4.14.2 with this fix in there.
   


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