deb-ceilometer/ceilometer/nova_client.py

170 lines
5.3 KiB
Python

#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import functools
import novaclient
from novaclient import client as nova_client
from oslo_config import cfg
from oslo_log import log
OPTS = [
cfg.BoolOpt('nova_http_log_debug',
default=False,
help='Allow novaclient\'s debug log output.'),
]
SERVICE_OPTS = [
cfg.StrOpt('nova',
default='compute',
help='Nova service type.'),
]
cfg.CONF.register_opts(OPTS)
cfg.CONF.register_opts(SERVICE_OPTS, group='service_types')
cfg.CONF.import_opt('http_timeout', 'ceilometer.service')
cfg.CONF.import_group('service_credentials', 'ceilometer.service')
LOG = log.getLogger(__name__)
def logged(func):
@functools.wraps(func)
def with_logging(*args, **kwargs):
try:
return func(*args, **kwargs)
except Exception as e:
LOG.exception(e)
raise
return with_logging
class Client(object):
"""A client which gets information via python-novaclient."""
def __init__(self, bypass_url=None, auth_token=None):
"""Initialize a nova client object."""
conf = cfg.CONF.service_credentials
tenant = conf.os_tenant_id or conf.os_tenant_name
self.nova_client = nova_client.Client(
version=2,
username=conf.os_username,
api_key=conf.os_password,
project_id=tenant,
auth_url=conf.os_auth_url,
auth_token=auth_token,
region_name=conf.os_region_name,
endpoint_type=conf.os_endpoint_type,
service_type=cfg.CONF.service_types.nova,
bypass_url=bypass_url,
cacert=conf.os_cacert,
insecure=conf.insecure,
timeout=cfg.CONF.http_timeout,
http_log_debug=cfg.CONF.nova_http_log_debug,
no_cache=True)
def _with_flavor_and_image(self, instances):
flavor_cache = {}
image_cache = {}
for instance in instances:
self._with_flavor(instance, flavor_cache)
self._with_image(instance, image_cache)
return instances
def _with_flavor(self, instance, cache):
fid = instance.flavor['id']
if fid in cache:
flavor = cache.get(fid)
else:
try:
flavor = self.nova_client.flavors.get(fid)
except novaclient.exceptions.NotFound:
flavor = None
cache[fid] = flavor
attr_defaults = [('name', 'unknown-id-%s' % fid),
('vcpus', 0), ('ram', 0), ('disk', 0),
('ephemeral', 0)]
for attr, default in attr_defaults:
if not flavor:
instance.flavor[attr] = default
continue
instance.flavor[attr] = getattr(flavor, attr, default)
def _with_image(self, instance, cache):
try:
iid = instance.image['id']
except TypeError:
instance.image = None
instance.kernel_id = None
instance.ramdisk_id = None
return
if iid in cache:
image = cache.get(iid)
else:
try:
image = self.nova_client.images.get(iid)
except novaclient.exceptions.NotFound:
image = None
cache[iid] = image
attr_defaults = [('kernel_id', None),
('ramdisk_id', None)]
instance.image['name'] = (
getattr(image, 'name') if image else 'unknown-id-%s' % iid)
image_metadata = getattr(image, 'metadata', None)
for attr, default in attr_defaults:
ameta = image_metadata.get(attr) if image_metadata else default
setattr(instance, attr, ameta)
@logged
def instance_get_all_by_host(self, hostname, since=None):
"""Returns list of instances on particular host.
If since is supplied, it will return the instances changed since that
datetime. since should be in ISO Format '%Y-%m-%dT%H:%M:%SZ'
"""
search_opts = {'host': hostname, 'all_tenants': True}
if since:
search_opts['changes-since'] = since
return self._with_flavor_and_image(self.nova_client.servers.list(
detailed=True,
search_opts=search_opts))
@logged
def instance_get_all(self, since=None):
"""Returns list of all instances.
If since is supplied, it will return the instances changes since that
datetime. since should be in ISO Format '%Y-%m-%dT%H:%M:%SZ'
"""
search_opts = {'all_tenants': True}
if since:
search_opts['changes-since'] = since
return self.nova_client.servers.list(
detailed=True,
search_opts=search_opts)
@logged
def floating_ip_get_all(self):
"""Returns all floating ips."""
return self.nova_client.floating_ips.list()