def _ask_child_zone_to_create_instance(self, context, zone_info,
request_spec, kwargs):
"""Once we have determined that the request should go to one
of our children, we need to fabricate a new POST /servers/
call with the same parameters that were passed into us.
Note that we have to reverse engineer from our args to get back the
image, flavor, ipgroup, etc. since the original call could have
come in from EC2 (which doesn't use these things).
"""
instance_type = request_spec['instance_type']
instance_properties = request_spec['instance_properties']
name = instance_properties['display_name']
image_ref = instance_properties['image_ref']
meta = instance_properties['metadata']
flavor_id = instance_type['flavorid']
reservation_id = instance_properties['reservation_id']
files = kwargs['injected_files']
child_zone = zone_info['child_zone']
child_blob = zone_info['child_blob']
zone = db.zone_get(context, child_zone)
url = zone.api_url
LOG.debug(
_("Forwarding instance create call to child zone %(url)s"
". ReservationID=%(reservation_id)s") % locals())
nova = None
try:
nova = novaclient.Client(zone.username, zone.password, None, url)
nova.authenticate()
except novaclient_exceptions.BadRequest, e:
raise exception.NotAuthorized(
_("Bad credentials attempting "
"to talk to zone at %(url)s.") % locals())
def _call_novaclient(zone):
"""Call novaclient. Broken out for testing purposes. Note that
we have to use the admin credentials for this since there is no
available context."""
client = novaclient.Client(zone.username, zone.password, None,
zone.api_url, region_name=zone.name)
return client.zones.info()._info
def call_novaclient(self):
"""Call novaclient. Broken out for testing purposes. Note that
we have to use the admin credentials for this since there is no
available context."""
username = self.zone_info['username']
password = self.zone_info['password']
api_url = self.zone_info['api_url']
region_name = self.zone_info['name']
client = novaclient.Client(username, password, None, api_url,
region_name)
return client.zones.info()._info
def call_zone_method(context,
method_name,
errors_to_ignore=None,
novaclient_collection_name='zones',
zones=None,
*args,
**kwargs):
"""Returns a list of (zone, call_result) objects."""
if not isinstance(errors_to_ignore, (list, tuple)):
# This will also handle the default None
errors_to_ignore = [errors_to_ignore]
pool = greenpool.GreenPool()
results = []
if zones is None:
zones = db.zone_get_all(context.elevated())
for zone in zones:
try:
# Do this on behalf of the user ...
nova = novaclient.Client(zone.username,
zone.password,
None,
zone.api_url,
region_name=zone.name,
token=context.auth_token)
nova.authenticate()
except novaclient_exceptions.BadRequest, e:
url = zone.api_url
name = zone.name
LOG.warn(
_("Authentication failed to zone "
"'%(name)s' URL=%(url)s: %(e)s") % locals())
#TODO (dabo) - add logic for failure counts per zone,
# with escalation after a given number of failures.
continue
novaclient_collection = getattr(nova, novaclient_collection_name)
collection_method = getattr(novaclient_collection, method_name)
def _error_trap(*args, **kwargs):
try:
return collection_method(*args, **kwargs)
except Exception as e:
if type(e) in errors_to_ignore:
return None
raise
res = pool.spawn(_error_trap, *args, **kwargs)
results.append((zone, res))
def _process(func, zone):
"""Worker stub for green thread pool. Give the worker
an authenticated nova client and zone info."""
try:
nova = novaclient.Client(zone.username, zone.password, None,
zone.api_url)
nova.authenticate()
except novaclient_exceptions.BadRequest, e:
url = zone.api_url
LOG.warn(
_("Failed request to zone; URL=%(url)s: %(e)s") % locals())
# This is being returned instead of raised, so that when
# results are processed in unmarshal_result() after the
# greenpool.imap completes, the exception can be raised
# there if no other zones had a response.
return exception.ZoneRequestError()
def _process(func, zone):
"""Worker stub for green thread pool. Give the worker
an authenticated nova client and zone info."""
nova = novaclient.Client(zone.username, zone.password, None, zone.api_url)
nova.authenticate()
return func(nova, zone)
def _call_novaclient(zone):
"""Call novaclient. Broken out for testing purposes."""
client = novaclient.Client(zone.username, zone.password, None,
zone.api_url)
return client.zones.info()._info
