The problem is happening when there are more ports created in neutron than the
quota on it.
In this case, neutron client api will return a negative number for
max_net_count, which will be used as a total number of instances that should
be provisioned, and as a result none are being provisioned.
This caused the above exception to be raised.
_create_instance()
|
|--> base_options, max_net_count = self._validate_and_build_base_options()
| |
| max_network_count = self._check_requested_networks()<--'
| |
| self.network_api.validate_networks()<--'
| |
| `-->
| 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
|
| # Continuing in _create_instance max_count gets the value of
| # max_net_count:
|
|--> elif max_net_count < max_count:
| LOG.debug(_("max count reduced from %(max_count)d to "
| "%(max_net_count)d due to network port quota"),
| {'max_count': max_count,
| 'max_net_count': max_net_count})
| max_count = max_net_count
|
| # Now, _provision_instances is being called to provision a negative
| # number of instances
|--> instances = self._provision_instances(context, instance_type,
min_count, max_count, base_options, boot_meta, security_groups,
block_device_mapping)
|
`-> LOG.debug(_("Going to run %s instances..") % num_instances)
instances = []
try:
for i in xrange(num_instances):
instance = instance_obj.Instance()
instance.update(base_options)
instance = self.create_db_entry_for_new_instance(
context, instance_type, boot_meta, instance,
security_groups, block_device_mapping,
num_instances, i)
instances.append(instance)
...
return instances # this will return an empty list.
server = self._view_builder.create(req, instances[0])
IndexError: list index out
Fix proposed to branch: master
Review: https:/