I am running a scale environment where I needed to exceed the port quota count to unlimited.
The neutron.conf documentation for the quota_port parameter states the following:
# Number of ports allowed per tenant. A negative value means unlimited.
Looking at this, I had set the value to -2 as:
quota_port = -2
After this, the nova boot started failing with Error code 500.
The error stack is the following:
TRACE nova.api.openstack File "/usr/lib/python2.7/site-packages/nova/api/openstack/compute/servers.py", line 1016, in create
TRACE nova.api.openstack server = self._view_builder.create(req, instances[0])
TRACE nova.api.openstack IndexError: list index out of range
TRACE nova.api.openstack
The error is seen because in the /nova/network/neutronv2/api.py - validate_networks() method, the quota check is very strict in terms for the unlimited check:
if quotas.get('port', -1) == -1:
# Unlimited Port Quota
return num_instances
else:
free_ports = quotas.get('port') - len(ports)
ports_needed = ports_needed_per_instance * num_instances
if free_ports >= ports_needed:
return num_instances
else:
return free_ports // ports_needed_per_instance
The above code would return free_ports - and that value is negative.
Filing this bug to change the above check to something like:
if quotas.get('port', -1) <= -1:
# Unlimited Port Quota
return num_instances
This will allow nova to react correctly with the documentation in neutron as well.
Fix proposed to branch: master
Review: https:/