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[ignazio <1928299@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Hello, I have upgraded my centos 7 openstack installation from Stein to Train.
On train I am facing an issue with live migration:
when a vm is migrated from one kvm node to another, it stops to respond to ping requests from some minutes.
I had the same issue on Stein and I resolved it with a workaround suggest by Sean Mooney where legacy port binding was used. 

On train seems there aren't backported patches to solve the issue.

I enabled debug option on neutron and here there is the dhcp-agent.log from the exact time when the live migration started:
http://paste.openstack.org/show/805325/

Here there is the openvswitch-agent log from the source kvm node:

http://paste.openstack.org/show/805327/

Here there is the openvswich agent log from the destination kvm node:

http://paste.openstack.org/show/805329/


I am using openvswitch mechanism driver and iptables_hybrid firewall driver.

Please any help will be appreciated 
Ignazio

** Affects: neutron
     Importance: Undecided
         Status: New


** Tags: train-ignazio

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https://bugs.launchpad.net/bugs/1928299

Title:
  centos7 train vm live migration stops network on vm for some minutes

Status in neutron:
  New

Bug description:
  Hello, I have upgraded my centos 7 openstack installation from Stein to Train.
  On train I am facing an issue with live migration:
  when a vm is migrated from one kvm node to another, it stops to respond to ping requests from some minutes.
  I had the same issue on Stein and I resolved it with a workaround suggest by Sean Mooney where legacy port binding was used. 

  On train seems there aren't backported patches to solve the issue.

  I enabled debug option on neutron and here there is the dhcp-agent.log from the exact time when the live migration started:
  http://paste.openstack.org/show/805325/

  Here there is the openvswitch-agent log from the source kvm node:

  http://paste.openstack.org/show/805327/

  Here there is the openvswich agent log from the destination kvm node:

  http://paste.openstack.org/show/805329/

  
  I am using openvswitch mechanism driver and iptables_hybrid firewall driver.

  Please any help will be appreciated 
  Ignazio

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