The VM is paused until the 'up' notification to give the Neutron backend time to wire up the port.
On Tue, Jun 28, 2016 at 7:59 PM, <kangjingt...@sina.com> wrote: > Hi guys: > > As we know, nova will interacts with neutron for port creating and > configuration while creating VM. > > In the method /nova/virt/libvirt/driver.py:_create_domain_and_network, > here nova ultilizes event mechanism(sqlalchemy) to monitor port status in > neutron DB. After having subscribed event from neutron DB for port status > update, it will wait for the event sent from neutron. Finally nova revceive > port status update event sent from neutron server, which means port is > ready and the creating of VM will almost complete. But it seems like the > creating of VM will fail if nova not receive event after the timeout > period(default 300s). > > What the problem I have encountered is that the VM have been created > successfully without the notification event send from neutron. Using > command "nova show VM-ID" shows all states of VM are correct(vm_state: > active and power state: running). Let's assume a scenario where we replace > neutron agent with controller, as in the case of OVN, dragonflow, ODL,etc. > > There is an example to support port 'up' or 'down ' notification in > project OVN. Please refer to this link: > https://review.openstack.org/#/c/178826/ > > So, anyone can give an explanation what's the purpose of the event? Dose > the event have any impact on creating of VM? Any comment will be > appreciated, thanks! > > Best Regard! > Jingting > > __________________________________________________________________________ > OpenStack Development Mailing List (not for usage questions) > Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > >
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