openstack team mailing list archive

["Vaze, Mandar" <Mandar.Vaze@xxxxxxxxxxx>]

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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