c3ed27b0ba
Implements blueprint fast-cloning-for-xenserver 1. use_cow_images flag is reused for xenserver to check if copy on write images should be used. 2. image-id is used to tag an image which has already been streamed from glance. 3. If cow is true, when an instance of an image is created for the first time on a given xenserver, the image is streamed from glance and copy on write disk is created for the instance. 4. For subsequent instance creation requests (of the same image), a copy on write disk is created from the base image that is already present on the host. 5. If cow is false, when an instance of an image is created for the first time on a host, the image is streamed from glance and its copy is made to create a virtual disk for the instance. 6. For subsequent instance creation requests, a copy of disk is made for creating the disk for the instance. 7. Snapshot creation code was updated to handle cow=true. Now there can be upto 3 disks in the chain. The base disk needs to be uploaded too. 8. Also added a cache_images flag. Depending on whether the flag is turned on on not, images will be cached on the host. Change-Id: I54838a24b061c134877f3479c925c6ee78da14bc
457 lines
18 KiB
Python
457 lines
18 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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# Copyright 2012 Red Hat, Inc.
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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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"""Command-line flag library.
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Emulates gflags by wrapping cfg.ConfigOpts.
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The idea is to move fully to cfg eventually, and this wrapper is a
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stepping stone.
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"""
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import os
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import socket
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import sys
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from nova.compat import flagfile
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from nova.openstack.common import cfg
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class NovaConfigOpts(cfg.ConfigOpts):
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def __init__(self, *args, **kwargs):
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super(NovaConfigOpts, self).__init__(*args, **kwargs)
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self.disable_interspersed_args()
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def __call__(self, argv):
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with flagfile.handle_flagfiles_managed(argv[1:]) as args:
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return argv[:1] + super(NovaConfigOpts, self).__call__(args)
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FLAGS = NovaConfigOpts()
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class UnrecognizedFlag(Exception):
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pass
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def DECLARE(name, module_string, flag_values=FLAGS):
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if module_string not in sys.modules:
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__import__(module_string, globals(), locals())
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if name not in flag_values:
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raise UnrecognizedFlag('%s not defined by %s' % (name, module_string))
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def _get_my_ip():
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"""Returns the actual ip of the local machine."""
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try:
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csock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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csock.connect(('8.8.8.8', 80))
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(addr, port) = csock.getsockname()
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csock.close()
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return addr
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except socket.error as ex:
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return "127.0.0.1"
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log_opts = [
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cfg.BoolOpt('verbose',
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default=False,
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help='show debug output'),
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cfg.StrOpt('logdir',
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default=None,
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help='output to a per-service log file in named directory'),
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cfg.StrOpt('logfile',
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default=None,
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help='output to named file'),
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cfg.BoolOpt('use_syslog',
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default=False,
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help='output to syslog'),
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cfg.BoolOpt('use_stderr',
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default=True,
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help='log to standard error'),
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]
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core_opts = [
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cfg.StrOpt('connection_type',
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default=None,
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help='libvirt, xenapi or fake'),
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cfg.StrOpt('sql_connection',
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default='sqlite:///$state_path/$sqlite_db',
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help='connection string for sql database'),
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cfg.StrOpt('api_paste_config',
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default="api-paste.ini",
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help='File name for the paste.deploy config for nova-api'),
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cfg.StrOpt('state_path',
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default=os.path.join(os.path.dirname(__file__), '../'),
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help="Top-level directory for maintaining nova's state"),
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cfg.StrOpt('lock_path',
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default=os.path.join(os.path.dirname(__file__), '../'),
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help='Directory for lock files'),
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]
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debug_opts = [
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cfg.BoolOpt('fake_network',
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default=False,
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help='should we use fake network devices and addresses'),
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cfg.BoolOpt('fake_rabbit',
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default=False,
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help='use a fake rabbit'),
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]
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FLAGS.register_cli_opts(log_opts)
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FLAGS.register_cli_opts(core_opts)
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FLAGS.register_cli_opts(debug_opts)
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global_opts = [
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cfg.StrOpt('my_ip',
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default=_get_my_ip(),
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help='host ip address'),
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cfg.ListOpt('region_list',
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default=[],
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help='list of region=fqdn pairs separated by commas'),
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cfg.StrOpt('aws_access_key_id',
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default='admin',
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help='AWS Access ID'),
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cfg.StrOpt('aws_secret_access_key',
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default='admin',
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help='AWS Access Key'),
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cfg.StrOpt('glance_host',
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default='$my_ip',
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help='default glance host'),
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cfg.IntOpt('glance_port',
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default=9292,
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help='default glance port'),
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cfg.ListOpt('glance_api_servers',
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default=['$glance_host:$glance_port'],
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help='glance api servers available to nova (host:port)'),
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cfg.IntOpt('glance_num_retries',
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default=0,
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help='Number retries when downloading an image from glance'),
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cfg.IntOpt('s3_port',
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default=3333,
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help='s3 port'),
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cfg.StrOpt('s3_host',
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default='$my_ip',
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help='s3 host (for infrastructure)'),
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cfg.StrOpt('s3_dmz',
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default='$my_ip',
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help='s3 dmz ip (for instances)'),
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cfg.StrOpt('cert_topic',
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default='cert',
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help='the topic cert nodes listen on'),
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cfg.StrOpt('compute_topic',
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default='compute',
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help='the topic compute nodes listen on'),
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cfg.StrOpt('console_topic',
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default='console',
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help='the topic console proxy nodes listen on'),
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cfg.StrOpt('scheduler_topic',
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default='scheduler',
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help='the topic scheduler nodes listen on'),
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cfg.StrOpt('volume_topic',
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default='volume',
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help='the topic volume nodes listen on'),
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cfg.StrOpt('network_topic',
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default='network',
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help='the topic network nodes listen on'),
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cfg.StrOpt('vsa_topic',
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default='vsa',
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help='the topic that nova-vsa service listens on'),
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cfg.StrOpt('rabbit_host',
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default='localhost',
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help='rabbit host'),
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cfg.IntOpt('rabbit_port',
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default=5672,
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help='rabbit port'),
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cfg.BoolOpt('rabbit_use_ssl',
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default=False,
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help='connect over SSL'),
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cfg.StrOpt('rabbit_userid',
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default='guest',
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help='rabbit userid'),
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cfg.StrOpt('rabbit_password',
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default='guest',
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help='rabbit password'),
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cfg.StrOpt('rabbit_virtual_host',
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default='/',
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help='rabbit virtual host'),
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cfg.IntOpt('rabbit_retry_interval',
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default=1,
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help='rabbit connection retry interval to start'),
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cfg.IntOpt('rabbit_retry_backoff',
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default=2,
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help='rabbit connection retry backoff in seconds'),
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cfg.IntOpt('rabbit_max_retries',
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default=0,
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help='maximum rabbit connection attempts (0=try forever)'),
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cfg.StrOpt('control_exchange',
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default='nova',
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help='the main exchange to connect to'),
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cfg.BoolOpt('rabbit_durable_queues',
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default=False,
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help='use durable queues'),
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cfg.ListOpt('enabled_apis',
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default=['ec2', 'osapi_compute', 'osapi_volume', 'metadata'],
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help='list of APIs to enable by default'),
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cfg.StrOpt('ec2_host',
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default='$my_ip',
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help='ip of api server'),
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cfg.StrOpt('ec2_dmz_host',
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default='$my_ip',
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help='internal ip of api server'),
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cfg.IntOpt('ec2_port',
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default=8773,
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help='cloud controller port'),
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cfg.StrOpt('ec2_scheme',
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default='http',
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help='prefix for ec2'),
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cfg.StrOpt('ec2_path',
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default='/services/Cloud',
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help='suffix for ec2'),
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cfg.ListOpt('osapi_compute_ext_list',
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default=[],
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help='Specify list of extensions to load when using osapi_'
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'compute_extension option with nova.api.openstack.'
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'compute.contrib.select_extensions'),
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cfg.MultiStrOpt('osapi_compute_extension',
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default=[
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'nova.api.openstack.compute.contrib.standard_extensions'
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],
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help='osapi compute extension to load'),
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cfg.ListOpt('osapi_volume_ext_list',
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default=[],
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help='Specify list of extensions to load when using osapi_'
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'volume_extension option with nova.api.openstack.'
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'volume.contrib.select_extensions'),
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cfg.MultiStrOpt('osapi_volume_extension',
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default=[
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'nova.api.openstack.volume.contrib.standard_extensions'
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],
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help='osapi volume extension to load'),
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cfg.StrOpt('osapi_scheme',
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default='http',
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help='prefix for openstack'),
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cfg.StrOpt('osapi_path',
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default='/v1.1/',
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help='suffix for openstack'),
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cfg.StrOpt('osapi_compute_link_prefix',
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default=None,
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help='Base URL that will be presented to users in links '
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'to the Openstack Compute API'),
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cfg.StrOpt('osapi_glance_link_prefix',
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default=None,
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help='Base URL that will be presented to users in links '
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'to glance resources'),
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cfg.IntOpt('osapi_max_limit',
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default=1000,
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help='max number of items returned in a collection response'),
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cfg.StrOpt('metadata_host',
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default='$my_ip',
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help='ip of metadata server'),
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cfg.IntOpt('metadata_port',
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default=8775,
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help='Metadata API port'),
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cfg.StrOpt('default_project',
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default='openstack',
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help='default project for openstack'),
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cfg.StrOpt('default_image',
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default='ami-11111',
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help='default image to use, testing only'),
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cfg.StrOpt('default_instance_type',
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default='m1.small',
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help='default instance type to use, testing only'),
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cfg.StrOpt('null_kernel',
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default='nokernel',
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help='kernel image that indicates not to use a kernel, but to '
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'use a raw disk image instead'),
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cfg.StrOpt('vpn_image_id',
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default='0',
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help='image id for cloudpipe vpn server'),
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cfg.StrOpt('vpn_key_suffix',
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default='-vpn',
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help='Suffix to add to project name for vpn key and secgroups'),
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cfg.IntOpt('auth_token_ttl',
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default=3600,
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help='Seconds for auth tokens to linger'),
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cfg.StrOpt('logfile_mode',
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default='0644',
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help='Default file mode of the logs.'),
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cfg.StrOpt('sqlite_db',
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default='nova.sqlite',
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help='file name for sqlite'),
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cfg.BoolOpt('sqlite_synchronous',
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default=True,
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help='Synchronous mode for sqlite'),
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cfg.IntOpt('sql_idle_timeout',
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default=3600,
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help='timeout for idle sql database connections'),
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cfg.IntOpt('sql_max_retries',
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default=12,
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help='sql connection attempts'),
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cfg.IntOpt('sql_retry_interval',
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default=10,
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help='sql connection retry interval'),
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cfg.StrOpt('compute_manager',
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default='nova.compute.manager.ComputeManager',
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help='Manager for compute'),
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cfg.StrOpt('console_manager',
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default='nova.console.manager.ConsoleProxyManager',
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help='Manager for console proxy'),
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cfg.StrOpt('cert_manager',
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default='nova.cert.manager.CertManager',
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help='Manager for cert'),
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cfg.StrOpt('instance_dns_manager',
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default='nova.network.dns_driver.DNSDriver',
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help='DNS Manager for instance IPs'),
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cfg.StrOpt('instance_dns_domain',
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default='',
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help='DNS Zone for instance IPs'),
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cfg.StrOpt('floating_ip_dns_manager',
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default='nova.network.dns_driver.DNSDriver',
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help='DNS Manager for floating IPs'),
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cfg.StrOpt('network_manager',
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default='nova.network.manager.VlanManager',
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help='Manager for network'),
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cfg.StrOpt('volume_manager',
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default='nova.volume.manager.VolumeManager',
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help='Manager for volume'),
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cfg.StrOpt('scheduler_manager',
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default='nova.scheduler.manager.SchedulerManager',
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help='Manager for scheduler'),
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cfg.StrOpt('vsa_manager',
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default='nova.vsa.manager.VsaManager',
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help='Manager for vsa'),
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cfg.StrOpt('vc_image_name',
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default='vc_image',
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help='the VC image ID (for a VC image that exists in Glance)'),
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cfg.StrOpt('default_vsa_instance_type',
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default='m1.small',
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help='default instance type for VSA instances'),
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cfg.IntOpt('max_vcs_in_vsa',
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default=32,
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help='maxinum VCs in a VSA'),
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cfg.IntOpt('vsa_part_size_gb',
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default=100,
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help='default partition size for shared capacity'),
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cfg.StrOpt('firewall_driver',
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default='nova.virt.firewall.IptablesFirewallDriver',
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help='Firewall driver (defaults to iptables)'),
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cfg.StrOpt('image_service',
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default='nova.image.glance.GlanceImageService',
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help='The service to use for retrieving and searching images.'),
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cfg.StrOpt('host',
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default=socket.gethostname(),
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help='Name of this node. This can be an opaque identifier. '
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'It is not necessarily a hostname, FQDN, or IP address.'),
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cfg.StrOpt('node_availability_zone',
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default='nova',
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help='availability zone of this node'),
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cfg.StrOpt('notification_driver',
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default='nova.notifier.no_op_notifier',
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help='Default driver for sending notifications'),
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cfg.ListOpt('memcached_servers',
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default=None,
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help='Memcached servers or None for in process cache.'),
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cfg.StrOpt('zone_name',
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default='nova',
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help='name of this zone'),
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cfg.ListOpt('zone_capabilities',
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default=['hypervisor=xenserver;kvm', 'os=linux;windows'],
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help='Key/Multi-value list with the capabilities of the zone'),
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cfg.StrOpt('build_plan_encryption_key',
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default=None,
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help='128bit (hex) encryption key for scheduler build plans.'),
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cfg.StrOpt('instance_usage_audit_period',
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default='month',
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help='time period to generate instance usages for.'),
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cfg.IntOpt('bandwith_poll_interval',
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default=600,
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help='interval to pull bandwidth usage info'),
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cfg.BoolOpt('start_guests_on_host_boot',
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default=False,
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help='Whether to restart guests when the host reboots'),
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cfg.BoolOpt('resume_guests_state_on_host_boot',
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default=False,
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help='Whether to start guests that were running before the '
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'host rebooted'),
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cfg.StrOpt('default_ephemeral_format',
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default=None,
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help='The default format a ephemeral_volume will be '
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'formatted with on creation.'),
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cfg.StrOpt('root_helper',
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default='sudo',
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help='Command prefix to use for running commands as root'),
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cfg.StrOpt('network_driver',
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default='nova.network.linux_net',
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help='Driver to use for network creation'),
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cfg.BoolOpt('use_ipv6',
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default=False,
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help='use ipv6'),
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cfg.BoolOpt('enable_instance_password',
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default=True,
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help='Allows use of instance password during '
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'server creation'),
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cfg.IntOpt('password_length',
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default=12,
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help='Length of generated instance admin passwords'),
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cfg.BoolOpt('monkey_patch',
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default=False,
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help='Whether to log monkey patching'),
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cfg.ListOpt('monkey_patch_modules',
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default=[
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'nova.api.ec2.cloud:nova.notifier.api.notify_decorator',
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'nova.compute.api:nova.notifier.api.notify_decorator'
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],
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help='List of modules/decorators to monkey patch'),
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cfg.BoolOpt('allow_resize_to_same_host',
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default=False,
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help='Allow destination machine to match source for resize. '
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'Useful when testing in single-host environments.'),
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cfg.StrOpt('stub_network',
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default=False,
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help='Stub network related code'),
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cfg.IntOpt('reclaim_instance_interval',
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default=0,
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help='Interval in seconds for reclaiming deleted instances'),
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cfg.IntOpt('zombie_instance_updated_at_window',
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default=172800,
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help='Number of seconds zombie instances are cleaned up.'),
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cfg.IntOpt('service_down_time',
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default=60,
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help='maximum time since last check-in for up service'),
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cfg.StrOpt('default_schedule_zone',
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default=None,
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help='zone to use when user doesnt specify one'),
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cfg.ListOpt('isolated_images',
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default=[],
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help='Images to run on isolated host'),
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cfg.ListOpt('isolated_hosts',
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default=[],
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help='Host reserved for specific images'),
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cfg.BoolOpt('cache_images',
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default=True,
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help='Cache glance images locally'),
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cfg.BoolOpt('use_cow_images',
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default=True,
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help='Whether to use cow images')
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]
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FLAGS.register_opts(global_opts)
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