661 lines
26 KiB
Python
661 lines
26 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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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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from email.mime.multipart import MIMEMultipart
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from email.mime.text import MIMEText
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import json
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import os
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import pkgutil
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from urlparse import urlparse
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from oslo.config import cfg
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from heat.engine import signal_responder
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from heat.engine import clients
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from heat.engine import resource
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from heat.engine import scheduler
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from heat.engine.resources import volume
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from heat.common import exception
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from heat.engine.resources.network_interface import NetworkInterface
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from heat.openstack.common.gettextutils import _
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from heat.openstack.common import log as logging
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from heat.openstack.common import uuidutils
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logger = logging.getLogger(__name__)
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class Restarter(signal_responder.SignalResponder):
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properties_schema = {'InstanceId': {'Type': 'String',
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'Required': True}}
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attributes_schema = {
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"AlarmUrl": ("A signed url to handle the alarm. "
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"(Heat extension)")
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}
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def _find_resource(self, resource_id):
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'''
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Return the resource with the specified instance ID, or None if it
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cannot be found.
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'''
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for resource in self.stack:
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if resource.resource_id == resource_id:
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return resource
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return None
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def handle_signal(self, details=None):
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if details is None:
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alarm_state = 'alarm'
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else:
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alarm_state = details.get('state', 'alarm').lower()
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logger.info('%s Alarm, new state %s' % (self.name, alarm_state))
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if alarm_state != 'alarm':
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return
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victim = self._find_resource(self.properties['InstanceId'])
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if victim is None:
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logger.info('%s Alarm, can not find instance %s' %
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(self.name, self.properties['InstanceId']))
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return
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logger.info('%s Alarm, restarting resource: %s' %
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(self.name, victim.name))
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self.stack.restart_resource(victim.name)
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def _resolve_attribute(self, name):
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'''
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heat extension: "AlarmUrl" returns the url to post to the policy
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when there is an alarm.
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'''
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if name == 'AlarmUrl' and self.resource_id is not None:
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return unicode(self._get_signed_url())
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class Instance(resource.Resource):
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# AWS does not require InstanceType but Heat does because the nova
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# create api call requires a flavor
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tags_schema = {'Key': {'Type': 'String',
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'Required': True},
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'Value': {'Type': 'String',
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'Required': True}}
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properties_schema = {'ImageId': {'Type': 'String',
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'Required': True},
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'InstanceType': {'Type': 'String',
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'Required': True},
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'KeyName': {'Type': 'String'},
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'AvailabilityZone': {'Type': 'String'},
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'DisableApiTermination': {'Type': 'String',
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'Implemented': False},
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'KernelId': {'Type': 'String',
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'Implemented': False},
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'Monitoring': {'Type': 'Boolean',
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'Implemented': False},
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'PlacementGroupName': {'Type': 'String',
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'Implemented': False},
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'PrivateIpAddress': {'Type': 'String',
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'Implemented': False},
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'RamDiskId': {'Type': 'String',
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'Implemented': False},
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'SecurityGroups': {'Type': 'List'},
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'SecurityGroupIds': {'Type': 'List'},
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'NetworkInterfaces': {'Type': 'List'},
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'SourceDestCheck': {'Type': 'Boolean',
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'Implemented': False},
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'SubnetId': {'Type': 'String'},
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'Tags': {'Type': 'List',
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'Schema': {'Type': 'Map',
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'Schema': tags_schema}},
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'NovaSchedulerHints': {'Type': 'List',
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'Schema': {
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'Type': 'Map',
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'Schema': tags_schema
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}},
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'Tenancy': {'Type': 'String',
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'AllowedValues': ['dedicated', 'default'],
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'Implemented': False},
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'UserData': {'Type': 'String'},
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'Volumes': {'Type': 'List'}}
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attributes_schema = {'AvailabilityZone': ('The Availability Zone where the'
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' specified instance is '
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'launched.'),
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'PrivateDnsName': ('Private DNS name of the specified'
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' instance.'),
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'PublicDnsName': ('Public DNS name of the specified '
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'instance.'),
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'PrivateIp': ('Private IP address of the specified '
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'instance.'),
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'PublicIp': ('Public IP address of the specified '
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'instance.')}
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update_allowed_keys = ('Metadata', 'Properties')
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update_allowed_properties = ('InstanceType',)
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_deferred_server_statuses = ['BUILD',
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'HARD_REBOOT',
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'PASSWORD',
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'REBOOT',
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'RESCUE',
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'RESIZE',
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'REVERT_RESIZE',
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'SHUTOFF',
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'SUSPENDED',
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'VERIFY_RESIZE']
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def __init__(self, name, json_snippet, stack):
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super(Instance, self).__init__(name, json_snippet, stack)
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self.ipaddress = None
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self.mime_string = None
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def _set_ipaddress(self, networks):
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'''
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Read the server's IP address from a list of networks provided by Nova
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'''
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# Just record the first ipaddress
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for n in networks:
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if len(networks[n]) > 0:
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self.ipaddress = networks[n][0]
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break
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def _ipaddress(self):
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'''
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Return the server's IP address, fetching it from Nova if necessary
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'''
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if self.ipaddress is None:
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try:
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server = self.nova().servers.get(self.resource_id)
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except clients.novaclient.exceptions.NotFound as ex:
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logger.warn('Instance IP address not found (%s)' % str(ex))
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else:
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self._set_ipaddress(server.networks)
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return self.ipaddress or '0.0.0.0'
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def _resolve_attribute(self, name):
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res = None
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if name == 'AvailabilityZone':
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res = self.properties['AvailabilityZone']
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elif name in ['PublicIp', 'PrivateIp', 'PublicDnsName',
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'PrivateDnsName']:
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res = self._ipaddress()
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logger.info('%s._resolve_attribute(%s) == %s' % (self.name, name, res))
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return unicode(res) if res else None
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def _build_userdata(self, userdata):
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if not self.mime_string:
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# Build mime multipart data blob for cloudinit userdata
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def make_subpart(content, filename, subtype=None):
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if subtype is None:
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subtype = os.path.splitext(filename)[0]
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msg = MIMEText(content, _subtype=subtype)
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msg.add_header('Content-Disposition', 'attachment',
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filename=filename)
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return msg
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def read_cloudinit_file(fn):
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data = pkgutil.get_data('heat', 'cloudinit/%s' % fn)
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data = data.replace('@INSTANCE_USER@',
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cfg.CONF.instance_user)
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return data
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attachments = [(read_cloudinit_file('config'), 'cloud-config'),
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(read_cloudinit_file('boothook.sh'), 'boothook.sh',
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'cloud-boothook'),
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(read_cloudinit_file('part_handler.py'),
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'part-handler.py'),
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(userdata, 'cfn-userdata', 'x-cfninitdata'),
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(read_cloudinit_file('loguserdata.py'),
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'loguserdata.py', 'x-shellscript')]
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if 'Metadata' in self.t:
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attachments.append((json.dumps(self.metadata),
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'cfn-init-data', 'x-cfninitdata'))
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attachments.append((cfg.CONF.heat_watch_server_url,
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'cfn-watch-server', 'x-cfninitdata'))
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attachments.append((cfg.CONF.heat_metadata_server_url,
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'cfn-metadata-server', 'x-cfninitdata'))
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# Create a boto config which the cfntools on the host use to know
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# where the cfn and cw API's are to be accessed
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cfn_url = urlparse(cfg.CONF.heat_metadata_server_url)
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cw_url = urlparse(cfg.CONF.heat_watch_server_url)
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is_secure = cfg.CONF.instance_connection_is_secure
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vcerts = cfg.CONF.instance_connection_https_validate_certificates
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boto_cfg = "\n".join(["[Boto]",
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"debug = 0",
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"is_secure = %s" % is_secure,
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"https_validate_certificates = %s" % vcerts,
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"cfn_region_name = heat",
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"cfn_region_endpoint = %s" %
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cfn_url.hostname,
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"cloudwatch_region_name = heat",
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"cloudwatch_region_endpoint = %s" %
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cw_url.hostname])
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attachments.append((boto_cfg,
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'cfn-boto-cfg', 'x-cfninitdata'))
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subparts = [make_subpart(*args) for args in attachments]
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mime_blob = MIMEMultipart(_subparts=subparts)
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self.mime_string = mime_blob.as_string()
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return self.mime_string
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def _build_nics(self, network_interfaces, subnet_id=None):
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nics = None
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if network_interfaces:
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unsorted_nics = []
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for entry in network_interfaces:
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nic = (entry
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if not isinstance(entry, basestring)
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else {'NetworkInterfaceId': entry,
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'DeviceIndex': len(unsorted_nics)})
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unsorted_nics.append(nic)
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sorted_nics = sorted(unsorted_nics,
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key=lambda nic: int(nic['DeviceIndex']))
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nics = [{'port-id': nic['NetworkInterfaceId']}
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for nic in sorted_nics]
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else:
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# if SubnetId property in Instance, ensure subnet exists
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if subnet_id:
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quantumclient = self.quantum()
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network_id = NetworkInterface.network_id_from_subnet_id(
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quantumclient, subnet_id)
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# if subnet verified, create a port to use this subnet
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# if port is not created explicitly, nova will choose
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# the first subnet in the given network.
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if network_id:
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fixed_ip = {'subnet_id': subnet_id}
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props = {
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'admin_state_up': True,
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'network_id': network_id,
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'fixed_ips': [fixed_ip]
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}
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port = quantumclient.create_port({'port': props})['port']
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nics = [{'port-id': port['id']}]
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return nics
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def _get_security_groups(self):
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security_groups = []
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for property in ('SecurityGroups', 'SecurityGroupIds'):
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if self.properties.get(property) is not None:
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for sg in self.properties.get(property):
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security_groups.append(sg)
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if not security_groups:
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security_groups = None
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return security_groups
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def _get_flavor_id(self, flavor):
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flavor_id = None
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flavor_list = self.nova().flavors.list()
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for o in flavor_list:
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if o.name == flavor:
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flavor_id = o.id
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break
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if flavor_id is None:
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raise exception.FlavorMissing(flavor_id=flavor)
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return flavor_id
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def _get_keypair(self, key_name):
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for keypair in self.nova().keypairs.list():
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if keypair.name == key_name:
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return keypair
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raise exception.UserKeyPairMissing(key_name=key_name)
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def handle_create(self):
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security_groups = self._get_security_groups()
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userdata = self.properties['UserData'] or ''
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flavor = self.properties['InstanceType']
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availability_zone = self.properties['AvailabilityZone']
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key_name = self.properties['KeyName']
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if key_name:
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# confirm keypair exists
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self._get_keypair(key_name)
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image_name = self.properties['ImageId']
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image_id = self._get_image_id(image_name)
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flavor_id = self._get_flavor_id(flavor)
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tags = {}
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if self.properties['Tags']:
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for tm in self.properties['Tags']:
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tags[tm['Key']] = tm['Value']
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else:
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tags = None
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scheduler_hints = {}
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if self.properties['NovaSchedulerHints']:
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for tm in self.properties['NovaSchedulerHints']:
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scheduler_hints[tm['Key']] = tm['Value']
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else:
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scheduler_hints = None
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nics = self._build_nics(self.properties['NetworkInterfaces'],
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subnet_id=self.properties['SubnetId'])
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server_userdata = self._build_userdata(userdata)
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server = None
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try:
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server = self.nova().servers.create(
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name=self.physical_resource_name(),
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image=image_id,
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flavor=flavor_id,
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key_name=key_name,
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security_groups=security_groups,
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userdata=server_userdata,
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meta=tags,
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scheduler_hints=scheduler_hints,
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nics=nics,
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availability_zone=availability_zone)
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finally:
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# Avoid a race condition where the thread could be cancelled
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# before the ID is stored
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if server is not None:
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self.resource_id_set(server.id)
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return server, scheduler.TaskRunner(self._attach_volumes_task())
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def _attach_volumes_task(self):
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attach_tasks = (volume.VolumeAttachTask(self.stack,
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self.resource_id,
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volume_id,
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device)
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for volume_id, device in self.volumes())
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return scheduler.PollingTaskGroup(attach_tasks)
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def check_create_complete(self, cookie):
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return self._check_active(cookie)
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def _check_active(self, cookie):
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server, volume_attach = cookie
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if not volume_attach.started():
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if server.status != 'ACTIVE':
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server.get()
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# Some clouds append extra (STATUS) strings to the status
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short_server_status = server.status.split('(')[0]
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if short_server_status in self._deferred_server_statuses:
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return False
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elif server.status == 'ACTIVE':
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self._set_ipaddress(server.networks)
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volume_attach.start()
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return volume_attach.done()
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elif server.status == 'ERROR':
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delete = scheduler.TaskRunner(self._delete_server, server)
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delete(wait_time=0.2)
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exc = exception.Error("Build of server %s failed." %
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server.name)
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raise exception.ResourceFailure(exc)
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else:
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exc = exception.Error('%s instance[%s] status[%s]' %
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('nova reported unexpected',
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self.name, server.status))
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raise exception.ResourceFailure(exc)
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else:
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return volume_attach.step()
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def volumes(self):
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"""
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Return an iterator over (volume_id, device) tuples for all volumes
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that should be attached to this instance.
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"""
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volumes = self.properties['Volumes']
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if volumes is None:
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return []
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return ((vol['VolumeId'], vol['Device']) for vol in volumes)
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def handle_update(self, json_snippet, tmpl_diff, prop_diff):
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if 'Metadata' in tmpl_diff:
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self.metadata = tmpl_diff['Metadata']
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if 'InstanceType' in prop_diff:
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flavor = prop_diff['InstanceType']
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flavor_id = self._get_flavor_id(flavor)
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server = self.nova().servers.get(self.resource_id)
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server.resize(flavor_id)
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scheduler.TaskRunner(self._check_resize, server, flavor)()
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def _check_resize(self, server, flavor):
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"""
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Verify that the server is properly resized. If that's the case, confirm
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the resize, if not raise an error.
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"""
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yield
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server.get()
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while server.status == 'RESIZE':
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yield
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server.get()
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if server.status == 'VERIFY_RESIZE':
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server.confirm_resize()
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else:
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raise exception.Error(
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"Resizing to '%s' failed, status '%s'" % (
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flavor, server.status))
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def metadata_update(self, new_metadata=None):
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'''
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Refresh the metadata if new_metadata is None
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'''
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if new_metadata is None:
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self.metadata = self.parsed_template('Metadata')
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def validate(self):
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'''
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Validate any of the provided params
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'''
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res = super(Instance, self).validate()
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if res:
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return res
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# check validity of key
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key_name = self.properties.get('KeyName', None)
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if key_name:
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keypairs = self.nova().keypairs.list()
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if not any(k.name == key_name for k in keypairs):
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return {'Error':
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'Provided KeyName is not registered with nova'}
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# check validity of security groups vs. network interfaces
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security_groups = self._get_security_groups()
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if security_groups and self.properties.get('NetworkInterfaces'):
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return {'Error':
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'Cannot define both SecurityGroups/SecurityGroupIds and '
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'NetworkInterfaces properties.'}
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# make sure the image exists.
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image_identifier = self.properties['ImageId']
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try:
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self._get_image_id(image_identifier)
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except exception.ImageNotFound:
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return {'Error': 'Image %s was not found in glance' %
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image_identifier}
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except exception.NoUniqueImageFound:
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return {'Error': 'Multiple images were found with name %s' %
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image_identifier}
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return
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def _delete_server(self, server):
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'''
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Return a co-routine that deletes the server and waits for it to
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disappear from Nova.
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'''
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server.delete()
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while True:
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yield
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try:
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server.get()
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except clients.novaclient.exceptions.NotFound:
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break
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def _detach_volumes_task(self):
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'''
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Detach volumes from the instance
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'''
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|
detach_tasks = (volume.VolumeDetachTask(self.stack,
|
|
self.resource_id,
|
|
volume_id)
|
|
for volume_id, device in self.volumes())
|
|
return scheduler.PollingTaskGroup(detach_tasks)
|
|
|
|
def handle_delete(self):
|
|
'''
|
|
Delete an instance, blocking until it is disposed by OpenStack
|
|
'''
|
|
if self.resource_id is None:
|
|
return
|
|
|
|
scheduler.TaskRunner(self._detach_volumes_task())()
|
|
|
|
try:
|
|
server = self.nova().servers.get(self.resource_id)
|
|
except clients.novaclient.exceptions.NotFound:
|
|
pass
|
|
else:
|
|
delete = scheduler.TaskRunner(self._delete_server, server)
|
|
delete(wait_time=0.2)
|
|
|
|
self.resource_id = None
|
|
|
|
def _get_image_id(self, image_identifier):
|
|
image_id = None
|
|
if uuidutils.is_uuid_like(image_identifier):
|
|
try:
|
|
image_id = self.nova().images.get(image_identifier).id
|
|
except clients.novaclient.exceptions.NotFound:
|
|
logger.info("Image %s was not found in glance"
|
|
% image_identifier)
|
|
raise exception.ImageNotFound(image_name=image_identifier)
|
|
else:
|
|
try:
|
|
image_list = self.nova().images.list()
|
|
except clients.novaclient.exceptions.ClientException as ex:
|
|
raise exception.ServerError(message=str(ex))
|
|
image_names = dict(
|
|
(o.id, o.name)
|
|
for o in image_list if o.name == image_identifier)
|
|
if len(image_names) == 0:
|
|
logger.info("Image %s was not found in glance" %
|
|
image_identifier)
|
|
raise exception.ImageNotFound(image_name=image_identifier)
|
|
elif len(image_names) > 1:
|
|
logger.info("Mulitple images %s were found in glance with name"
|
|
% image_identifier)
|
|
raise exception.NoUniqueImageFound(image_name=image_identifier)
|
|
image_id = image_names.popitem()[0]
|
|
return image_id
|
|
|
|
def handle_suspend(self):
|
|
'''
|
|
Suspend an instance - note we do not wait for the SUSPENDED state,
|
|
this is polled for by check_suspend_complete in a similar way to the
|
|
create logic so we can take advantage of coroutines
|
|
'''
|
|
if self.resource_id is None:
|
|
raise exception.Error(_('Cannot suspend %s, resource_id not set') %
|
|
self.name)
|
|
|
|
try:
|
|
server = self.nova().servers.get(self.resource_id)
|
|
except clients.novaclient.exceptions.NotFound:
|
|
raise exception.NotFound(_('Failed to find instance %s') %
|
|
self.resource_id)
|
|
else:
|
|
logger.debug("suspending instance %s" % self.resource_id)
|
|
# We want the server.suspend to happen after the volume
|
|
# detachement has finished, so pass both tasks and the server
|
|
suspend_runner = scheduler.TaskRunner(server.suspend)
|
|
volumes_runner = scheduler.TaskRunner(self._detach_volumes_task())
|
|
return server, suspend_runner, volumes_runner
|
|
|
|
def check_suspend_complete(self, cookie):
|
|
server, suspend_runner, volumes_runner = cookie
|
|
|
|
if not volumes_runner.started():
|
|
volumes_runner.start()
|
|
|
|
if volumes_runner.done():
|
|
if not suspend_runner.started():
|
|
suspend_runner.start()
|
|
|
|
if suspend_runner.done():
|
|
if server.status == 'SUSPENDED':
|
|
return True
|
|
|
|
server.get()
|
|
logger.debug("%s check_suspend_complete status = %s" %
|
|
(self.name, server.status))
|
|
if server.status in list(self._deferred_server_statuses +
|
|
['ACTIVE']):
|
|
return server.status == 'SUSPENDED'
|
|
else:
|
|
raise exception.Error(_(' nova reported unexpected '
|
|
'instance[%(instance)s] '
|
|
'status[%(status)s]') %
|
|
{'instance': self.name,
|
|
'status': server.status})
|
|
else:
|
|
suspend_runner.step()
|
|
else:
|
|
return volumes_runner.step()
|
|
|
|
def handle_resume(self):
|
|
'''
|
|
Resume an instance - note we do not wait for the ACTIVE state,
|
|
this is polled for by check_resume_complete in a similar way to the
|
|
create logic so we can take advantage of coroutines
|
|
'''
|
|
if self.resource_id is None:
|
|
raise exception.Error(_('Cannot resume %s, resource_id not set') %
|
|
self.name)
|
|
|
|
try:
|
|
server = self.nova().servers.get(self.resource_id)
|
|
except clients.novaclient.exceptions.NotFound:
|
|
raise exception.NotFound(_('Failed to find instance %s') %
|
|
self.resource_id)
|
|
else:
|
|
logger.debug("resuming instance %s" % self.resource_id)
|
|
server.resume()
|
|
return server, scheduler.TaskRunner(self._attach_volumes_task())
|
|
|
|
def check_resume_complete(self, cookie):
|
|
return self._check_active(cookie)
|
|
|
|
|
|
def resource_mapping():
|
|
return {
|
|
'AWS::EC2::Instance': Instance,
|
|
'OS::Heat::HARestarter': Restarter,
|
|
}
|