311 lines
9.6 KiB
Python
311 lines
9.6 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import re
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from nova import context
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from nova import db
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from nova import exception
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from nova import flags
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from nova.network import model as network_model
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from nova.openstack.common import log as logging
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from nova import utils
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FLAGS = flags.FLAGS
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LOG = logging.getLogger(__name__)
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def image_type(image_type):
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"""Converts to a three letter image type.
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aki, kernel => aki
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ari, ramdisk => ari
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anything else => ami
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"""
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if image_type == 'kernel':
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return 'aki'
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if image_type == 'ramdisk':
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return 'ari'
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if image_type not in ['aki', 'ari']:
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return 'ami'
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return image_type
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def id_to_glance_id(context, image_id):
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"""Convert an internal (db) id to a glance id."""
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return db.s3_image_get(context, image_id)['uuid']
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def glance_id_to_id(context, glance_id):
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"""Convert a glance id to an internal (db) id."""
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if glance_id is None:
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return
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try:
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return db.s3_image_get_by_uuid(context, glance_id)['id']
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except exception.NotFound:
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return db.s3_image_create(context, glance_id)['id']
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def ec2_id_to_glance_id(context, ec2_id):
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image_id = ec2_id_to_id(ec2_id)
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return id_to_glance_id(context, image_id)
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def glance_id_to_ec2_id(context, glance_id, image_type='ami'):
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image_id = glance_id_to_id(context, glance_id)
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return image_ec2_id(image_id, image_type=image_type)
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def ec2_id_to_id(ec2_id):
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"""Convert an ec2 ID (i-[base 16 number]) to an instance id (int)"""
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try:
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return int(ec2_id.split('-')[-1], 16)
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except ValueError:
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raise exception.InvalidEc2Id(ec2_id=ec2_id)
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def image_ec2_id(image_id, image_type='ami'):
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"""Returns image ec2_id using id and three letter type."""
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template = image_type + '-%08x'
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try:
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return id_to_ec2_id(image_id, template=template)
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except ValueError:
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#TODO(wwolf): once we have ec2_id -> glance_id mapping
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# in place, this wont be necessary
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return "ami-00000000"
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def get_ip_info_for_instance_from_nw_info(nw_info):
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ip_info = {}
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fixed_ips = nw_info.fixed_ips()
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ip_info['fixed_ips'] = [ip['address'] for ip in fixed_ips
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if ip['version'] == 4]
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ip_info['fixed_ip6s'] = [ip['address'] for ip in fixed_ips
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if ip['version'] == 6]
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ip_info['floating_ips'] = [ip['address'] for ip in nw_info.floating_ips()]
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return ip_info
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def get_ip_info_for_instance(context, instance):
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"""Return a dictionary of IP information for an instance"""
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info_cache = instance['info_cache'] or {}
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cached_nwinfo = info_cache.get('network_info')
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# Make sure empty response is turned into []
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if not cached_nwinfo:
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cached_nwinfo = []
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nw_info = network_model.NetworkInfo.hydrate(cached_nwinfo)
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return get_ip_info_for_instance_from_nw_info(nw_info)
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def get_availability_zone_by_host(services, host):
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if len(services) > 0:
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return services[0]['availability_zone']
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return 'unknown zone'
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def id_to_ec2_id(instance_id, template='i-%08x'):
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"""Convert an instance ID (int) to an ec2 ID (i-[base 16 number])"""
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return template % int(instance_id)
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def id_to_ec2_inst_id(instance_id):
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"""Get or create an ec2 instance ID (i-[base 16 number]) from uuid."""
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if instance_id is None:
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return None
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elif utils.is_uuid_like(instance_id):
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ctxt = context.get_admin_context()
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int_id = get_int_id_from_instance_uuid(ctxt, instance_id)
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return id_to_ec2_id(int_id)
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else:
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return id_to_ec2_id(instance_id)
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def ec2_inst_id_to_uuid(context, ec2_id):
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""""Convert an instance id to uuid."""
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int_id = ec2_id_to_id(ec2_id)
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return get_instance_uuid_from_int_id(context, int_id)
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def get_instance_uuid_from_int_id(context, int_id):
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return db.get_instance_uuid_by_ec2_id(context, int_id)
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def id_to_ec2_snap_id(snapshot_id):
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"""Get or create an ec2 volume ID (vol-[base 16 number]) from uuid."""
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if utils.is_uuid_like(snapshot_id):
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ctxt = context.get_admin_context()
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int_id = get_int_id_from_snapshot_uuid(ctxt, snapshot_id)
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return id_to_ec2_id(int_id, 'snap-%08x')
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else:
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return id_to_ec2_id(snapshot_id, 'snap-%08x')
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def id_to_ec2_vol_id(volume_id):
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"""Get or create an ec2 volume ID (vol-[base 16 number]) from uuid."""
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if utils.is_uuid_like(volume_id):
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ctxt = context.get_admin_context()
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int_id = get_int_id_from_volume_uuid(ctxt, volume_id)
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return id_to_ec2_id(int_id, 'vol-%08x')
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else:
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return id_to_ec2_id(volume_id, 'vol-%08x')
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def ec2_vol_id_to_uuid(ec2_id):
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"""Get the corresponding UUID for the given ec2-id."""
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ctxt = context.get_admin_context()
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# NOTE(jgriffith) first strip prefix to get just the numeric
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int_id = ec2_id_to_id(ec2_id)
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return get_volume_uuid_from_int_id(ctxt, int_id)
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def get_int_id_from_instance_uuid(context, instance_uuid):
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if instance_uuid is None:
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return
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try:
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return db.get_ec2_instance_id_by_uuid(context, instance_uuid)
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except exception.NotFound:
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return db.ec2_instance_create(context, instance_uuid)['id']
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def get_int_id_from_volume_uuid(context, volume_uuid):
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if volume_uuid is None:
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return
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try:
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return db.get_ec2_volume_id_by_uuid(context, volume_uuid)
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except exception.NotFound:
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return db.ec2_volume_create(context, volume_uuid)['id']
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def get_volume_uuid_from_int_id(context, int_id):
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return db.get_volume_uuid_by_ec2_id(context, int_id)
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def ec2_snap_id_to_uuid(ec2_id):
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"""Get the corresponding UUID for the given ec2-id."""
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ctxt = context.get_admin_context()
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# NOTE(jgriffith) first strip prefix to get just the numeric
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int_id = ec2_id_to_id(ec2_id)
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return get_snapshot_uuid_from_int_id(ctxt, int_id)
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def get_int_id_from_snapshot_uuid(context, snapshot_uuid):
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if snapshot_uuid is None:
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return
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try:
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return db.get_ec2_snapshot_id_by_uuid(context, snapshot_uuid)
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except exception.NotFound:
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return db.ec2_snapshot_create(context, snapshot_uuid)['id']
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def get_snapshot_uuid_from_int_id(context, int_id):
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return db.get_snapshot_uuid_by_ec2_id(context, int_id)
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def ec2_instance_id_to_uuid(context, ec2_id):
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int_id = ec2_id_to_id(ec2_id)
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return db.instance_get(context, int_id)['uuid']
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_c2u = re.compile('(((?<=[a-z])[A-Z])|([A-Z](?![A-Z]|$)))')
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def camelcase_to_underscore(str):
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return _c2u.sub(r'_\1', str).lower().strip('_')
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def _try_convert(value):
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"""Return a non-string from a string or unicode, if possible.
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============= =====================================================
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When value is returns
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============= =====================================================
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zero-length ''
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'None' None
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'True' True case insensitive
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'False' False case insensitive
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'0', '-0' 0
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0xN, -0xN int from hex (positive) (N is any number)
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0bN, -0bN int from binary (positive) (N is any number)
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* try conversion to int, float, complex, fallback value
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"""
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def _negative_zero(value):
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epsilon = 1e-7
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return 0 if abs(value) < epsilon else value
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if len(value) == 0:
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return ''
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if value == 'None':
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return None
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lowered_value = value.lower()
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if lowered_value == 'true':
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return True
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if lowered_value == 'false':
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return False
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for prefix, base in [('0x', 16), ('0b', 2), ('0', 8), ('', 10)]:
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try:
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if lowered_value.startswith((prefix, "-" + prefix)):
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return int(lowered_value, base)
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except ValueError:
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pass
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try:
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return _negative_zero(float(value))
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except ValueError:
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return value
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def dict_from_dotted_str(items):
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"""parse multi dot-separated argument into dict.
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EBS boot uses multi dot-separated arguments like
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BlockDeviceMapping.1.DeviceName=snap-id
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Convert the above into
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{'block_device_mapping': {'1': {'device_name': snap-id}}}
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"""
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args = {}
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for key, value in items:
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parts = key.split(".")
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key = str(camelcase_to_underscore(parts[0]))
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if isinstance(value, str) or isinstance(value, unicode):
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# NOTE(vish): Automatically convert strings back
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# into their respective values
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value = _try_convert(value)
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if len(parts) > 1:
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d = args.get(key, {})
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args[key] = d
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for k in parts[1:-1]:
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k = camelcase_to_underscore(k)
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v = d.get(k, {})
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d[k] = v
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d = v
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d[camelcase_to_underscore(parts[-1])] = value
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else:
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args[key] = value
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return args
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def search_opts_from_filters(filters):
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return dict((f['name'].replace('-', '_'), f['value']['1'])
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for f in filters if f['value']['1']) if filters else {}
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