Hi Mandar,
Thanks for bringing this up. For Essex, nova-manage commands to
create/delete Quantum networks must be run on the nova-network node. For
Folsom this will all change, as all networks will be created directly
against the Quantum API, rather than using nova-manage. I'll add a note to
the administrator guide, as this is not called there. Thanks!
Dan
On Thu, Apr 12, 2012 at 1:38 AM, Vaze, Mandar mandar.v...@nttdata.comwrote:
It is my understanding that in multi-node setup :
**· **nova-manage can be executed from any machine which may not
be running nova-network process. (Or should nova-manage always be run on
nova-network node ?)
**· **nova-manage does DB operations and delegates the actual
networking calls to nova-network process ?
** **
Is this understanding correct ?
** **
I traced “nova-manage network create” and nova-manage network delete”
using FlatDHCPManager (default for devstack/stack.sh)
Both these calls seem to be doing only DB operations.
BTW, nova-network process was shutdown during both “network create” and
“network delete” – Still both operations were successful.
** **
But when using QuantumManager as network manager – nova-manage seems to be
doing networking operations like “iptables-save” (during network create)
and “kill_dhcp” (during network delete)
(via linux-net L3 driver)
** **
Since nova-manage command may be executed on a host which isn’t running
nova-network – network commands like “iptables” and “kill -9 pid of
dnsmasq” on host running nova-manage seems incorrect.
** **
For the first scenario (iptables-save during “network create” – there is
already a defect in LP : https://bugs.launchpad.net/nova/+bug/977738
and review : https://review.openstack.org/6451
** **
I would like your comments and opinions which would help me understand
“What nova-manage should and should NOT do”
** **
Thanks,
-Mandar
** **
** **
** **
** **
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