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api.py
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api.py
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# Copyright 2011 Piston Cloud Computing, Inc.
# All Rights Reserved.
#
# 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.
"""Handles all requests relating to instances (guest vms)."""
import functools
import re
import time
import novaclient
import webob.exc
from nova import block_device
from nova.compute import instance_types
from nova.compute import power_state
from nova.compute import task_states
from nova.compute import vm_states
from nova.db import base
from nova import exception
from nova import flags
import nova.image
from nova import log as logging
from nova import network
import nova.policy
from nova import quota
from nova import rpc
from nova.scheduler import api as scheduler_api
from nova import utils
from nova import volume
LOG = logging.getLogger('nova.compute.api')
FLAGS = flags.FLAGS
flags.DECLARE('enable_zone_routing', 'nova.scheduler.api')
flags.DECLARE('consoleauth_topic', 'nova.consoleauth')
flags.DEFINE_integer('find_host_timeout', 30,
'Timeout after NN seconds when looking for a host.')
def check_instance_state(vm_state=None, task_state=None):
"""Decorator to check VM and/or task state before entry to API functions.
If the instance is in the wrong state, the wrapper will raise an exception.
"""
if vm_state is not None and not isinstance(vm_state, set):
vm_state = set(vm_state)
if task_state is not None and not isinstance(task_state, set):
task_state = set(task_state)
def outer(f):
@functools.wraps(f)
def inner(self, context, instance, *args, **kw):
if vm_state is not None and \
instance['vm_state'] not in vm_state:
raise exception.InstanceInvalidState(
attr='vm_state',
instance_uuid=instance['uuid'],
state=instance['vm_state'],
method=f.__name__)
if task_state is not None and \
instance['task_state'] not in task_state:
raise exception.InstanceInvalidState(
attr='task_state',
instance_uuid=instance['uuid'],
state=instance['task_state'],
method=f.__name__)
return f(self, context, instance, *args, **kw)
return inner
return outer
def wrap_check_policy(func):
"""Check corresponding policy prior of wrapped method to execution"""
@functools.wraps(func)
def wrapped(self, context, target, *args, **kwargs):
check_policy(context, func.__name__, target)
return func(self, context, target, *args, **kwargs)
return wrapped
def check_policy(context, action, target):
_action = 'compute:%s' % action
nova.policy.enforce(context, _action, target)
class API(base.Base):
"""API for interacting with the compute manager."""
def __init__(self, image_service=None, network_api=None, volume_api=None,
**kwargs):
self.image_service = image_service or \
nova.image.get_default_image_service()
self.network_api = network_api or network.API()
self.volume_api = volume_api or volume.API()
super(API, self).__init__(**kwargs)
def _check_injected_file_quota(self, context, injected_files):
"""Enforce quota limits on injected files.
Raises a QuotaError if any limit is exceeded.
"""
if injected_files is None:
return
limit = quota.allowed_injected_files(context, len(injected_files))
if len(injected_files) > limit:
raise exception.QuotaError(code="OnsetFileLimitExceeded")
path_limit = quota.allowed_injected_file_path_bytes(context)
for path, content in injected_files:
if len(path) > path_limit:
raise exception.QuotaError(code="OnsetFilePathLimitExceeded")
content_limit = quota.allowed_injected_file_content_bytes(
context, len(content))
if len(content) > content_limit:
raise exception.QuotaError(
code="OnsetFileContentLimitExceeded")
def _check_metadata_properties_quota(self, context, metadata=None):
"""Enforce quota limits on metadata properties."""
if not metadata:
metadata = {}
num_metadata = len(metadata)
quota_metadata = quota.allowed_metadata_items(context, num_metadata)
if quota_metadata < num_metadata:
pid = context.project_id
msg = _("Quota exceeded for %(pid)s, tried to set "
"%(num_metadata)s metadata properties") % locals()
LOG.warn(msg)
raise exception.QuotaError(msg, "MetadataLimitExceeded")
# Because metadata is stored in the DB, we hard-code the size limits
# In future, we may support more variable length strings, so we act
# as if this is quota-controlled for forwards compatibility
for k, v in metadata.iteritems():
if len(k) > 255 or len(v) > 255:
pid = context.project_id
msg = _("Quota exceeded for %(pid)s, metadata property "
"key or value too long") % locals()
LOG.warn(msg)
raise exception.QuotaError(msg, "MetadataLimitExceeded")
def _check_requested_networks(self, context, requested_networks):
""" Check if the networks requested belongs to the project
and the fixed IP address for each network provided is within
same the network block
"""
if requested_networks is None:
return
self.network_api.validate_networks(context, requested_networks)
def _create_instance(self, context, instance_type,
image_href, kernel_id, ramdisk_id,
min_count, max_count,
display_name, display_description,
key_name, key_data, security_group,
availability_zone, user_data, metadata,
injected_files, admin_password, zone_blob,
reservation_id, access_ip_v4, access_ip_v6,
requested_networks, config_drive,
block_device_mapping, auto_disk_config,
create_instance_here=False):
"""Verify all the input parameters regardless of the provisioning
strategy being performed and schedule the instance(s) for
creation."""
if not metadata:
metadata = {}
if not display_description:
display_description = ''
if not security_group:
security_group = 'default'
if not instance_type:
instance_type = instance_types.get_default_instance_type()
if not min_count:
min_count = 1
if not max_count:
max_count = min_count
if not metadata:
metadata = {}
block_device_mapping = block_device_mapping or []
num_instances = quota.allowed_instances(context, max_count,
instance_type)
if num_instances < min_count:
pid = context.project_id
LOG.warn(_("Quota exceeded for %(pid)s,"
" tried to run %(min_count)s instances") % locals())
if num_instances <= 0:
message = _("Instance quota exceeded. You cannot run any "
"more instances of this type.")
else:
message = _("Instance quota exceeded. You can only run %s "
"more instances of this type.") % num_instances
raise exception.QuotaError(message, "InstanceLimitExceeded")
self._check_metadata_properties_quota(context, metadata)
self._check_injected_file_quota(context, injected_files)
self._check_requested_networks(context, requested_networks)
(image_service, image_id) = nova.image.get_image_service(context,
image_href)
image = image_service.show(context, image_id)
if instance_type['memory_mb'] < int(image.get('min_ram') or 0):
raise exception.InstanceTypeMemoryTooSmall()
if instance_type['local_gb'] < int(image.get('min_disk') or 0):
raise exception.InstanceTypeDiskTooSmall()
config_drive_id = None
if config_drive and config_drive is not True:
# config_drive is volume id
config_drive, config_drive_id = None, config_drive
os_type = None
if 'properties' in image and 'os_type' in image['properties']:
os_type = image['properties']['os_type']
architecture = None
if 'properties' in image and 'arch' in image['properties']:
architecture = image['properties']['arch']
vm_mode = None
if 'properties' in image and 'vm_mode' in image['properties']:
vm_mode = image['properties']['vm_mode']
# If instance doesn't have auto_disk_config overridden by request, use
# whatever the image indicates
if auto_disk_config is None:
if ('properties' in image and
'auto_disk_config' in image['properties']):
auto_disk_config = utils.bool_from_str(
image['properties']['auto_disk_config'])
if kernel_id is None:
kernel_id = image['properties'].get('kernel_id', None)
if ramdisk_id is None:
ramdisk_id = image['properties'].get('ramdisk_id', None)
# FIXME(sirp): is there a way we can remove null_kernel?
# No kernel and ramdisk for raw images
if kernel_id == str(FLAGS.null_kernel):
kernel_id = None
ramdisk_id = None
LOG.debug(_("Creating a raw instance"))
# Make sure we have access to kernel and ramdisk (if not raw)
logging.debug("Using Kernel=%s, Ramdisk=%s" %
(kernel_id, ramdisk_id))
if kernel_id:
image_service.show(context, kernel_id)
if ramdisk_id:
image_service.show(context, ramdisk_id)
if config_drive_id:
image_service.show(context, config_drive_id)
self.ensure_default_security_group(context)
if key_data is None and key_name:
key_pair = self.db.key_pair_get(context, context.user_id, key_name)
key_data = key_pair['public_key']
if reservation_id is None:
reservation_id = utils.generate_uid('r')
root_device_name = block_device.properties_root_device_name(
image['properties'])
# NOTE(vish): We have a legacy hack to allow admins to specify hosts
# via az using az:host. It might be nice to expose an
# api to specify specific hosts to force onto, but for
# now it just supports this legacy hack.
host = None
if availability_zone:
availability_zone, _x, host = availability_zone.partition(':')
if not availability_zone:
availability_zone = FLAGS.default_schedule_zone
if context.is_admin and host:
filter_properties = {'force_hosts': [host]}
else:
filter_properties = {}
base_options = {
'reservation_id': reservation_id,
'image_ref': image_href,
'kernel_id': kernel_id or '',
'ramdisk_id': ramdisk_id or '',
'power_state': power_state.NOSTATE,
'vm_state': vm_states.BUILDING,
'config_drive_id': config_drive_id or '',
'config_drive': config_drive or '',
'user_id': context.user_id,
'project_id': context.project_id,
'launch_time': time.strftime('%Y-%m-%dT%H:%M:%SZ', time.gmtime()),
'instance_type_id': instance_type['id'],
'memory_mb': instance_type['memory_mb'],
'vcpus': instance_type['vcpus'],
'local_gb': instance_type['local_gb'],
'display_name': display_name,
'display_description': display_description,
'user_data': user_data or '',
'key_name': key_name,
'key_data': key_data,
'locked': False,
'metadata': metadata,
'access_ip_v4': access_ip_v4,
'access_ip_v6': access_ip_v6,
'availability_zone': availability_zone,
'os_type': os_type,
'architecture': architecture,
'vm_mode': vm_mode,
'root_device_name': root_device_name,
'auto_disk_config': auto_disk_config}
LOG.debug(_("Going to run %s instances...") % num_instances)
if create_instance_here:
instance = self.create_db_entry_for_new_instance(
context, instance_type, image, base_options,
security_group, block_device_mapping)
# Tells scheduler we created the instance already.
base_options['uuid'] = instance['uuid']
rpc_method = rpc.cast
else:
# We need to wait for the scheduler to create the instance
# DB entries, because the instance *could* be # created in
# a child zone.
rpc_method = rpc.call
# TODO(comstud): We should use rpc.multicall when we can
# retrieve the full instance dictionary from the scheduler.
# Otherwise, we could exceed the AMQP max message size limit.
# This would require the schedulers' schedule_run_instances
# methods to return an iterator vs a list.
instances = self._schedule_run_instance(
rpc_method,
context, base_options,
instance_type, zone_blob,
availability_zone, injected_files,
admin_password, image,
num_instances, requested_networks,
block_device_mapping, security_group,
filter_properties)
if create_instance_here:
return ([instance], reservation_id)
return (instances, reservation_id)
@staticmethod
def _volume_size(instance_type, virtual_name):
size = 0
if virtual_name == 'swap':
size = instance_type.get('swap', 0)
elif block_device.is_ephemeral(virtual_name):
num = block_device.ephemeral_num(virtual_name)
# TODO(yamahata): ephemeralN where N > 0
# Only ephemeral0 is allowed for now because InstanceTypes
# table only allows single local disk, local_gb.
# In order to enhance it, we need to add a new columns to
# instance_types table.
if num > 0:
return 0
size = instance_type.get('local_gb')
return size
def _update_image_block_device_mapping(self, elevated_context,
instance_type, instance_id,
mappings):
"""tell vm driver to create ephemeral/swap device at boot time by
updating BlockDeviceMapping
"""
instance_type = (instance_type or
instance_types.get_default_instance_type())
for bdm in block_device.mappings_prepend_dev(mappings):
LOG.debug(_("bdm %s"), bdm)
virtual_name = bdm['virtual']
if virtual_name == 'ami' or virtual_name == 'root':
continue
if not block_device.is_swap_or_ephemeral(virtual_name):
continue
size = self._volume_size(instance_type, virtual_name)
if size == 0:
continue
values = {
'instance_id': instance_id,
'device_name': bdm['device'],
'virtual_name': virtual_name,
'volume_size': size}
self.db.block_device_mapping_update_or_create(elevated_context,
values)
def _update_block_device_mapping(self, elevated_context,
instance_type, instance_id,
block_device_mapping):
"""tell vm driver to attach volume at boot time by updating
BlockDeviceMapping
"""
LOG.debug(_("block_device_mapping %s"), block_device_mapping)
for bdm in block_device_mapping:
assert 'device_name' in bdm
values = {'instance_id': instance_id}
for key in ('device_name', 'delete_on_termination', 'virtual_name',
'snapshot_id', 'volume_id', 'volume_size',
'no_device'):
values[key] = bdm.get(key)
virtual_name = bdm.get('virtual_name')
if (virtual_name is not None and
block_device.is_swap_or_ephemeral(virtual_name)):
size = self._volume_size(instance_type, virtual_name)
if size == 0:
continue
values['volume_size'] = size
# NOTE(yamahata): NoDevice eliminates devices defined in image
# files by command line option.
# (--block-device-mapping)
if virtual_name == 'NoDevice':
values['no_device'] = True
for k in ('delete_on_termination', 'volume_id',
'snapshot_id', 'volume_id', 'volume_size',
'virtual_name'):
values[k] = None
self.db.block_device_mapping_update_or_create(elevated_context,
values)
#NOTE(bcwaldon): No policy check since this is only used by scheduler and
# the compute api. That should probably be cleaned up, though.
def create_db_entry_for_new_instance(self, context, instance_type, image,
base_options, security_group, block_device_mapping, num=1):
"""Create an entry in the DB for this new instance,
including any related table updates (such as security group,
etc).
This is called by the scheduler after a location for the
instance has been determined.
"""
elevated = context.elevated()
if security_group is None:
security_group = ['default']
if not isinstance(security_group, list):
security_group = [security_group]
security_groups = []
for security_group_name in security_group:
group = self.db.security_group_get_by_name(context,
context.project_id,
security_group_name)
security_groups.append(group['id'])
instance = dict(launch_index=num, **base_options)
instance = self.db.instance_create(context, instance)
instance_id = instance['id']
instance_uuid = instance['uuid']
for security_group_id in security_groups:
self.db.instance_add_security_group(elevated,
instance_uuid,
security_group_id)
# BlockDeviceMapping table
self._update_image_block_device_mapping(elevated, instance_type,
instance_id, image['properties'].get('mappings', []))
self._update_block_device_mapping(elevated, instance_type, instance_id,
image['properties'].get('block_device_mapping', []))
# override via command line option
self._update_block_device_mapping(elevated, instance_type, instance_id,
block_device_mapping)
# Set sane defaults if not specified
updates = {}
display_name = instance.get('display_name')
if display_name is None:
display_name = self._default_display_name(instance_id)
hostname = instance.get('hostname')
if hostname is None:
hostname = display_name
updates['display_name'] = display_name
updates['hostname'] = utils.sanitize_hostname(hostname)
updates['vm_state'] = vm_states.BUILDING
updates['task_state'] = task_states.SCHEDULING
if (image['properties'].get('mappings', []) or
image['properties'].get('block_device_mapping', []) or
block_device_mapping):
updates['shutdown_terminate'] = False
instance = self.update(context, instance, **updates)
return instance
def _default_display_name(self, instance_id):
return "Server %s" % instance_id
def _schedule_run_instance(self,
rpc_method,
context, base_options,
instance_type, zone_blob,
availability_zone, injected_files,
admin_password, image,
num_instances,
requested_networks,
block_device_mapping,
security_group,
filter_properties):
"""Send a run_instance request to the schedulers for processing."""
pid = context.project_id
uid = context.user_id
LOG.debug(_("Sending create to scheduler for %(pid)s/%(uid)s's") %
locals())
request_spec = {
'image': image,
'instance_properties': base_options,
'instance_type': instance_type,
'blob': zone_blob,
'num_instances': num_instances,
'block_device_mapping': block_device_mapping,
'security_group': security_group,
}
return rpc_method(context,
FLAGS.scheduler_topic,
{"method": "run_instance",
"args": {"topic": FLAGS.compute_topic,
"request_spec": request_spec,
"admin_password": admin_password,
"injected_files": injected_files,
"requested_networks": requested_networks,
"filter_properties": filter_properties}})
def create(self, context, instance_type,
image_href, kernel_id=None, ramdisk_id=None,
min_count=None, max_count=None,
display_name=None, display_description=None,
key_name=None, key_data=None, security_group=None,
availability_zone=None, user_data=None, metadata=None,
injected_files=None, admin_password=None, zone_blob=None,
reservation_id=None, block_device_mapping=None,
access_ip_v4=None, access_ip_v6=None,
requested_networks=None, config_drive=None,
auto_disk_config=None):
"""
Provision instances, sending instance information to the
scheduler. The scheduler will determine where the instance(s)
go and will handle creating the DB entries.
Returns a tuple of (instances, reservation_id) where instances
could be 'None' or a list of instance dicts depending on if
we waited for information from the scheduler or not.
"""
target = {'project_id': context.project_id,
'user_id': context.user_id,
'availability_zone': availability_zone}
check_policy(context, 'create', target)
if requested_networks:
check_policy(context, 'create:attach_network', target)
if block_device_mapping:
check_policy(context, 'create:attach_volume', target)
# We can create the DB entry for the instance here if we're
# only going to create 1 instance and we're in a single
# zone deployment. This speeds up API responses for builds
# as we don't need to wait for the scheduler.
create_instance_here = (max_count == 1 and
not FLAGS.enable_zone_routing)
(instances, reservation_id) = self._create_instance(
context, instance_type,
image_href, kernel_id, ramdisk_id,
min_count, max_count,
display_name, display_description,
key_name, key_data, security_group,
availability_zone, user_data, metadata,
injected_files, admin_password, zone_blob,
reservation_id, access_ip_v4, access_ip_v6,
requested_networks, config_drive,
block_device_mapping, auto_disk_config,
create_instance_here=create_instance_here)
if create_instance_here or instances is None:
return (instances, reservation_id)
inst_ret_list = []
for instance in instances:
if instance.get('_is_precooked', False):
inst_ret_list.append(instance)
else:
# Scheduler only gives us the 'id'. We need to pull
# in the created instances from the DB
instance = self.db.instance_get(context, instance['id'])
inst_ret_list.append(dict(instance.iteritems()))
return (inst_ret_list, reservation_id)
def ensure_default_security_group(self, context):
"""Ensure that a context has a security group.
Creates a security group for the security context if it does not
already exist.
:param context: the security context
"""
try:
self.db.security_group_get_by_name(context,
context.project_id,
'default')
except exception.NotFound:
values = {'name': 'default',
'description': 'default',
'user_id': context.user_id,
'project_id': context.project_id}
self.db.security_group_create(context, values)
def trigger_security_group_rules_refresh(self, context, security_group_id):
"""Called when a rule is added to or removed from a security_group."""
security_group = self.db.security_group_get(context, security_group_id)
hosts = set()
for instance in security_group['instances']:
if instance['host'] is not None:
hosts.add(instance['host'])
for host in hosts:
rpc.cast(context,
self.db.queue_get_for(context, FLAGS.compute_topic, host),
{"method": "refresh_security_group_rules",
"args": {"security_group_id": security_group.id}})
def trigger_security_group_members_refresh(self, context, group_ids):
"""Called when a security group gains a new or loses a member.
Sends an update request to each compute node for whom this is
relevant.
"""
# First, we get the security group rules that reference these groups as
# the grantee..
security_group_rules = set()
for group_id in group_ids:
security_group_rules.update(
self.db.security_group_rule_get_by_security_group_grantee(
context,
group_id))
# ..then we distill the security groups to which they belong..
security_groups = set()
for rule in security_group_rules:
security_group = self.db.security_group_get(
context,
rule['parent_group_id'])
security_groups.add(security_group)
# ..then we find the instances that are members of these groups..
instances = set()
for security_group in security_groups:
for instance in security_group['instances']:
instances.add(instance)
# ...then we find the hosts where they live...
hosts = set()
for instance in instances:
if instance['host']:
hosts.add(instance['host'])
# ...and finally we tell these nodes to refresh their view of this
# particular security group.
for host in hosts:
rpc.cast(context,
self.db.queue_get_for(context, FLAGS.compute_topic, host),
{"method": "refresh_security_group_members",
"args": {"security_group_id": group_id}})
def trigger_provider_fw_rules_refresh(self, context):
"""Called when a rule is added to or removed from a security_group"""
hosts = [x['host'] for (x, idx)
in self.db.service_get_all_compute_sorted(context)]
for host in hosts:
rpc.cast(context,
self.db.queue_get_for(context, FLAGS.compute_topic, host),
{'method': 'refresh_provider_fw_rules', 'args': {}})
def _is_security_group_associated_with_server(self, security_group,
instance_uuid):
"""Check if the security group is already associated
with the instance. If Yes, return True.
"""
if not security_group:
return False
instances = security_group.get('instances')
if not instances:
return False
for inst in instances:
if (instance_uuid == inst['uuid']):
return True
return False
@wrap_check_policy
def add_security_group(self, context, instance, security_group_name):
"""Add security group to the instance"""
security_group = self.db.security_group_get_by_name(context,
context.project_id,
security_group_name)
instance_uuid = instance['uuid']
#check if the security group is associated with the server
if self._is_security_group_associated_with_server(security_group,
instance_uuid):
raise exception.SecurityGroupExistsForInstance(
security_group_id=security_group['id'],
instance_id=instance_uuid)
#check if the instance is in running state
if instance['power_state'] != power_state.RUNNING:
raise exception.InstanceNotRunning(instance_id=instance_uuid)
self.db.instance_add_security_group(context.elevated(),
instance_uuid,
security_group['id'])
host = instance['host']
rpc.cast(context,
self.db.queue_get_for(context, FLAGS.compute_topic, host),
{"method": "refresh_security_group_rules",
"args": {"security_group_id": security_group['id']}})
@wrap_check_policy
def remove_security_group(self, context, instance, security_group_name):
"""Remove the security group associated with the instance"""
security_group = self.db.security_group_get_by_name(context,
context.project_id,
security_group_name)
instance_uuid = instance['uuid']
#check if the security group is associated with the server
if not self._is_security_group_associated_with_server(security_group,
instance_uuid):
raise exception.SecurityGroupNotExistsForInstance(
security_group_id=security_group['id'],
instance_id=instance_uuid)
#check if the instance is in running state
if instance['power_state'] != power_state.RUNNING:
raise exception.InstanceNotRunning(instance_id=instance_uuid)
self.db.instance_remove_security_group(context.elevated(),
instance_uuid,
security_group['id'])
host = instance['host']
rpc.cast(context,
self.db.queue_get_for(context, FLAGS.compute_topic, host),
{"method": "refresh_security_group_rules",
"args": {"security_group_id": security_group['id']}})
@wrap_check_policy
@scheduler_api.reroute_compute("update")
def update(self, context, instance, **kwargs):
"""Updates the instance in the datastore.
:param context: The security context
:param instance: The instance to update
:param kwargs: All additional keyword args are treated
as data fields of the instance to be
updated
:returns: None
"""
rv = self.db.instance_update(context, instance["id"], kwargs)
return dict(rv.iteritems())
@wrap_check_policy
@check_instance_state(vm_state=[vm_states.ACTIVE, vm_states.SHUTOFF,
vm_states.ERROR])
@scheduler_api.reroute_compute("soft_delete")
def soft_delete(self, context, instance):
"""Terminate an instance."""
instance_uuid = instance["uuid"]
LOG.debug(_("Going to try to soft delete %s"), instance_uuid)
if instance['disable_terminate']:
return
# NOTE(jerdfelt): The compute daemon handles reclaiming instances
# that are in soft delete. If there is no host assigned, there is
# no daemon to reclaim, so delete it immediately.
host = instance['host']
if host:
self.update(context,
instance,
vm_state=vm_states.SOFT_DELETE,
task_state=task_states.POWERING_OFF,
deleted_at=utils.utcnow())
self._cast_compute_message('power_off_instance', context,
instance_uuid, host)
else:
LOG.warning(_("No host for instance %s, deleting immediately"),
instance["uuid"])
self.db.instance_destroy(context, instance['id'])
def _delete(self, context, instance):
host = instance['host']
if host:
self.update(context,
instance,
task_state=task_states.DELETING,
progress=0)
self._cast_compute_message('terminate_instance', context,
instance['uuid'], host)
else:
self.db.instance_destroy(context, instance['id'])
# NOTE(jerdfelt): The API implies that only ACTIVE and ERROR are
# allowed but the EC2 API appears to allow from RESCUED and STOPPED
# too
@wrap_check_policy
@check_instance_state(vm_state=[vm_states.ACTIVE, vm_states.BUILDING,
vm_states.ERROR, vm_states.RESCUED,
vm_states.SHUTOFF, vm_states.STOPPED])
@scheduler_api.reroute_compute("delete")
def delete(self, context, instance):
"""Terminate an instance."""
LOG.debug(_("Going to try to terminate %s"), instance["uuid"])
if instance['disable_terminate']:
return
self._delete(context, instance)
@wrap_check_policy
@check_instance_state(vm_state=[vm_states.SOFT_DELETE])
@scheduler_api.reroute_compute("restore")
def restore(self, context, instance):
"""Restore a previously deleted (but not reclaimed) instance."""
self.update(context,
instance,
vm_state=vm_states.ACTIVE,
task_state=None,
deleted_at=None)
host = instance['host']
if host:
self.update(context,
instance,
task_state=task_states.POWERING_ON)
self._cast_compute_message('power_on_instance', context,
instance['uuid'], host)
@wrap_check_policy
@check_instance_state(vm_state=[vm_states.SOFT_DELETE])
@scheduler_api.reroute_compute("force_delete")
def force_delete(self, context, instance):
"""Force delete a previously deleted (but not reclaimed) instance."""
self._delete(context, instance)
@wrap_check_policy
@check_instance_state(vm_state=[vm_states.ACTIVE, vm_states.SHUTOFF,
vm_states.RESCUED],
task_state=[None, task_states.RESIZE_VERIFY])
@scheduler_api.reroute_compute("stop")
def stop(self, context, instance, do_cast=True):
"""Stop an instance."""
instance_uuid = instance["uuid"]
LOG.debug(_("Going to try to stop %s"), instance_uuid)
self.update(context,
instance,
vm_state=vm_states.ACTIVE,
task_state=task_states.STOPPING,
terminated_at=utils.utcnow(),
progress=0)
host = instance['host']
if not host:
return
if do_cast:
self._cast_compute_message('stop_instance', context,
instance_uuid, host)
else:
self._call_compute_message('stop_instance', context, instance)
@wrap_check_policy
@check_instance_state(vm_state=[vm_states.STOPPED, vm_states.SHUTOFF])
def start(self, context, instance):
"""Start an instance."""
vm_state = instance["vm_state"]
instance_uuid = instance["uuid"]
LOG.debug(_("Going to try to start %s"), instance_uuid)
if vm_state == vm_states.SHUTOFF:
if instance['shutdown_terminate']:
LOG.warning(_("Instance %(instance_uuid)s is not "
"stopped. (%(vm_state)s") % locals())
return
# NOTE(yamahata): nova compute doesn't reap instances
# which initiated shutdown itself. So reap it here.
self.stop(context, instance, do_cast=False)
self.update(context,
instance,
vm_state=vm_states.STOPPED,
task_state=task_states.STARTING)
# TODO(yamahata): injected_files isn't supported right now.
# It is used only for osapi. not for ec2 api.
# availability_zone isn't used by run_instance.
rpc.cast(context,
FLAGS.scheduler_topic,
{"method": "start_instance",
"args": {"topic": FLAGS.compute_topic,
"instance_uuid": instance_uuid}})
#NOTE(bcwaldon): no policy check here since it should be rolled in to
# search_opts in get_all
def get_active_by_window(self, context, begin, end=None, project_id=None):
"""Get instances that were continuously active over a window."""
return self.db.instance_get_active_by_window(context, begin, end,
project_id)
#NOTE(bcwaldon): this doesn't really belong in this class
def get_instance_type(self, context, instance_type_id):
"""Get an instance type by instance type id."""
return instance_types.get_instance_type(instance_type_id)
def get(self, context, instance_id):
"""Get a single instance with the given instance_id."""
# NOTE(ameade): we still need to support integer ids for ec2
if utils.is_uuid_like(instance_id):
instance = self.db.instance_get_by_uuid(context, instance_id)
else:
instance = self.db.instance_get(context, instance_id)
check_policy(context, 'get', instance)
inst = dict(instance.iteritems())
# NOTE(comstud): Doesn't get returned with iteritems
inst['name'] = instance['name']
return inst
@scheduler_api.reroute_compute("get")
def routing_get(self, context, instance_id):
"""A version of get with special routing characteristics.
Use this method instead of get() if this is the only operation you
intend to to. It will route to novaclient.get if the instance is not
found.
"""
return self.get(context, instance_id)
def get_all(self, context, search_opts=None):
"""Get all instances filtered by one of the given parameters.
If there is no filter and the context is an admin, it will retrieve
all instances in the system.
Deleted instances will be returned by default, unless there is a
search option that says otherwise.