374 lines
15 KiB
Python
374 lines
15 KiB
Python
"""
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Copyright 2017 Platform9 Systems Inc.(http://www.platform9.com)
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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"""
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from googleapiclient import errors as gce_errors
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from neutron._i18n import _
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from neutron.callbacks import events
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from neutron.callbacks import registry
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from neutron.callbacks import resources
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from neutron.common import gceconf
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from neutron.common import gceutils
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from neutron.extensions import securitygroup as sg
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from neutron.manager import NeutronManager
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from neutron.plugins.ml2 import driver_api as api
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from neutron_lib import exceptions as e
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from oslo_log import log
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import ipaddr
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import random
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try:
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from neutron_lib.plugins import directory
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except ImportError:
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pass
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LOG = log.getLogger(__name__)
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class SecurityGroupInvalidDirection(e.InvalidInput):
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message = _("Security group rule for direction '%(direction)s' not "
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"supported. Allowed values are %(values)s.")
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class GceMechanismDriver(api.MechanismDriver):
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"""Ml2 Mechanism driver for GCE"""
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def __init__(self):
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super(GceMechanismDriver, self).__init__()
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self.gce_zone = gceconf.zone
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self.gce_region = gceconf.region
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self.gce_project = gceconf.project_id
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self.gce_svc_key = gceconf.service_key_path
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self._gce_svc = None
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def initialize(self):
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LOG.info("GCE Mechanism driver init with %s project, %s region" %
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(self.gce_project, self.gce_region))
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self._subscribe_events()
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@property
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def gce_svc(self):
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if self._gce_svc is None:
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self._gce_svc = gceutils.get_gce_service(self.gce_svc_key)
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return self._gce_svc
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def _subscribe_events(self):
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registry.subscribe(self.secgroup_callback, resources.SECURITY_GROUP,
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events.BEFORE_DELETE)
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registry.subscribe(self.secgroup_callback, resources.SECURITY_GROUP,
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events.BEFORE_UPDATE)
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registry.subscribe(self.secgroup_callback, resources.SECURITY_GROUP,
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events.BEFORE_RESPONSE)
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registry.subscribe(self.secgroup_callback,
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resources.SECURITY_GROUP_RULE, events.BEFORE_DELETE)
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registry.subscribe(self.secgroup_callback,
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resources.SECURITY_GROUP_RULE, events.BEFORE_UPDATE)
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registry.subscribe(self.secgroup_callback,
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resources.SECURITY_GROUP_RULE, events.BEFORE_CREATE)
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def _gce_network_name(self, context):
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return 'net-' + context.current[api.ID]
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def _gce_subnet_name(self, context):
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return 'subnet-' + context.current[api.ID]
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def _gce_subnet_network_name(self, context):
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return 'net-' + context.current['network_id']
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@staticmethod
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def is_private_network(cidr):
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return ipaddr.IPNetwork(cidr).is_private
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def create_network_precommit(self, context):
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pass
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def create_network_postcommit(self, context):
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compute, project = self.gce_svc, self.gce_project
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name = self._gce_network_name(context)
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operation = gceutils.create_network(compute, project, name)
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gceutils.wait_for_operation(compute, project, operation)
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LOG.info('Created network on GCE %s' % name)
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def update_network_precommit(self, context):
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pass
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def update_network_postcommit(self, context):
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pass
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def delete_network_precommit(self, context):
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pass
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def delete_network_postcommit(self, context):
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compute, project = self.gce_svc, self.gce_project
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name = self._gce_network_name(context)
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operation = gceutils.delete_network(compute, project, name)
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gceutils.wait_for_operation(compute, project, operation)
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LOG.info('Deleted network on GCE %s' % name)
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def create_subnet_precommit(self, context):
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pass
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def create_subnet_postcommit(self, context):
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compute = self.gce_svc
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project = self.gce_project
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region = self.gce_region
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network_name = self._gce_subnet_network_name(context)
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name = self._gce_subnet_name(context)
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cidr = context.current['cidr']
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if self.is_private_network(cidr):
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network = gceutils.get_network(compute, project, network_name)
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network_link = network['selfLink']
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operation = gceutils.create_subnet(compute, project, region, name,
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cidr, network_link)
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gceutils.wait_for_operation(compute, project, operation)
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LOG.info("Created subnet %s in region %s on GCE" % (name, region))
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def update_subnet_precommit(self, context):
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pass
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def update_subnet_postcommit(self, context):
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pass
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def delete_subnet_precommit(self, context):
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pass
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def delete_subnet_postcommit(self, context):
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compute = self.gce_svc
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project = self.gce_project
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region = self.gce_region
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cidr = context.current['cidr']
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if self.is_private_network(cidr):
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name = self._gce_subnet_name(context)
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operation = gceutils.delete_subnet(compute, project, region, name)
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gceutils.wait_for_operation(compute, project, operation)
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LOG.info("Deleted subnet %s in region %s on GCE" % (name, region))
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def _gce_secgrp_id(self, openstack_id):
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return "secgrp-" + openstack_id
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def _convert_secgrp_rule_to_gce(self, rule, network_link, validate=False):
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gce_rule = {
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'sourceRanges': [],
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'targetTags': [],
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'allowed': [{}],
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'priority': 1000
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}
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directions = {
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'ingress': 'INGRESS',
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}
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if rule['direction'] in directions:
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gce_rule['direction'] = directions[rule['direction']]
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else:
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raise SecurityGroupInvalidDirection(direction=rule['direction'],
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values=directions.keys())
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if rule['ethertype'] != 'IPv4':
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raise sg.SecurityGroupRuleInvalidEtherType(
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ethertype=rule['ethertype'], values=('IPv4', ))
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if not validate:
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gce_rule['name'] = self._gce_secgrp_id(rule['id'])
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gce_rule['network'] = network_link
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gce_protocols = ('tcp', 'udp', 'icmp', 'esp', 'ah', 'sctp')
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protocol = rule['protocol']
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if protocol is None:
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gce_rule['allowed'][0]['IPProtocol'] = 'all'
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elif protocol in gce_protocols:
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gce_rule['allowed'][0]['IPProtocol'] = protocol
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# GCE allows port specification for tcp and udp only
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if protocol in ('tcp', 'udp'):
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ports = []
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port_range_max = rule['port_range_max']
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port_range_min = rule['port_range_min']
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if port_range_max is None or port_range_min is None:
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ports.append('0-65535')
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elif port_range_max == port_range_min:
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ports.append(str(port_range_max))
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else:
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ports.append("%s-%s" % (port_range_min, port_range_max))
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gce_rule['allowed'][0]['ports'] = ports
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else:
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raise sg.SecurityGroupRuleInvalidProtocol(protocol=protocol,
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values=gce_protocols)
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if rule['remote_ip_prefix'] is None:
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gce_rule['sourceRanges'].append('0.0.0.0/0')
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else:
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gce_rule['sourceRanges'].append(rule['remote_ip_prefix'])
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return gce_rule
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def _create_secgrp_rule(self, context, rule, network_link):
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compute, project = self.gce_svc, self.gce_project
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try:
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gce_rule = self._convert_secgrp_rule_to_gce(rule, network_link)
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except SecurityGroupInvalidDirection:
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LOG.warn("Egress rules are not supported on GCE.")
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return
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except Exception as e:
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LOG.exception(
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"An error occured while creating security group: %s" % e)
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raise e
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LOG.info("Create GCE firewall rule %s" % gce_rule)
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operation = gceutils.create_firewall_rule(compute, project, gce_rule)
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gceutils.wait_for_operation(compute, project, operation)
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def _validate_secgrp_rule(self, rule):
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try:
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self._convert_secgrp_rule_to_gce(
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rule, network_link=None, validate=True)
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except SecurityGroupInvalidDirection:
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LOG.warn("Egress rules are not supported on GCE.")
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return
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except Exception as e:
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LOG.exception("An error occurred while creating security "
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"group: %s" % e)
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raise e
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def _update_secgrp_rule(self, context, rule_id):
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compute, project = self.gce_svc, self.gce_project
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name = self._gce_secgrp_id(rule_id)
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try:
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gce_firewall_info = gceutils.get_firewall_rule(
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compute, project, name)
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except gce_errors.HttpError:
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return
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try:
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core_plugin = NeutronManager.get_plugin()
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except AttributeError:
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core_plugin = directory.get_plugin()
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rule = core_plugin.get_security_group_rule(context, rule_id)
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network_link = gce_firewall_info['network']
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try:
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gce_rule = self._convert_secgrp_rule_to_gce(rule, network_link)
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LOG.info("Update GCE firewall rule %s" % name)
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operation = gceutils.update_firewall_rule(compute, project, name,
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gce_rule)
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gceutils.wait_for_operation(compute, project, operation)
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except Exception as e:
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LOG.exception("An error occurred while updating security "
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"group: %s" % e)
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LOG.error("Deleting existing GCE firewall rule %s" % name)
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operation = gceutils.delete_firewall_rule(compute, project, name)
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gceutils.wait_for_operation(compute, project, operation)
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def _delete_secgrp_rule(self, context, rule_id):
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name = self._gce_secgrp_id(rule_id)
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compute, project = self.gce_svc, self.gce_project
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try:
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LOG.warn("Delete existing GCE firewall rule %s,"
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"as firewall rule update not GCE compatible." % name)
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operation = gceutils.delete_firewall_rule(compute, project, name)
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gceutils.wait_for_operation(compute, project, operation)
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except gce_errors.HttpError:
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pass
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def _create_secgrp_rules_if_needed(self, context, secgrp_ids):
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try:
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core_plugin = NeutronManager.get_plugin()
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except AttributeError:
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core_plugin = directory.get_plugin()
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secgrp_rules = []
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for secgrp_id in secgrp_ids:
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secgrp = core_plugin.get_security_group(context._plugin_context,
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secgrp_id)
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secgrp_rules.extend(secgrp['security_group_rules'])
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if secgrp_rules:
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network_name = self._gce_subnet_network_name(context)
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compute, project = self.gce_svc, self.gce_project
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network = gceutils.get_network(compute, project, network_name)
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network_link = network['selfLink']
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for secgrp_rule in secgrp_rules:
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try:
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gce_rule_name = self._gce_secgrp_id(secgrp_rule['id'])
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gceutils.get_firewall_rule(compute, project, gce_rule_name)
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except gce_errors.HttpError:
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self._create_secgrp_rule(context, secgrp_rule,
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network_link)
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def _validate_secgrp(self, context, secgrp):
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secgrp_rules = secgrp['security_group_rules']
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try:
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for secgrp_rule in secgrp_rules:
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self._validate_secgrp_rule(secgrp_rule)
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except Exception as e:
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try:
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core_plugin = NeutronManager.get_plugin()
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except AttributeError:
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core_plugin = directory.get_plugin()
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LOG.info('Rollback create security group: %s' % secgrp['id'])
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core_plugin.delete_security_group(context, secgrp['id'])
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raise e
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def _update_secgrp(self, context, secgrp_id):
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try:
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core_plugin = NeutronManager.get_plugin()
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except AttributeError:
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core_plugin = directory.get_plugin()
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secgrp = core_plugin.get_security_group(context, secgrp_id)
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secgrp_rules = secgrp['security_group_rules']
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for secgrp_rule in secgrp_rules:
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self._update_secgrp_rule(context, secgrp_rule['id'])
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def _delete_secgrp(self, context, secgrp_id):
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try:
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core_plugin = NeutronManager.get_plugin()
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except AttributeError:
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core_plugin = directory.get_plugin()
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secgrp = core_plugin.get_security_group(context, secgrp_id)
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secgrp_rules = secgrp['security_group_rules']
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for secgrp_rule in secgrp_rules:
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self._delete_secgrp_rule(context, secgrp_rule['id'])
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def bind_port(self, context):
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fixed_ip_dict = dict()
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if 'fixed_ips' in context.current:
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if len(context.current['fixed_ips']):
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fixed_ip_dict = context.current['fixed_ips'][0]
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secgrp_ids = context.current['security_groups']
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if secgrp_ids:
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self._create_secgrp_rules_if_needed(context, secgrp_ids)
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segment_id = random.choice(context.segments_to_bind)[api.ID]
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context.set_binding(segment_id, "vip_type_a", fixed_ip_dict,
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status='ACTIVE')
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return True
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def secgroup_callback(self, resource, event, trigger, **kwargs):
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LOG.debug("Secgrp_callback: %s %s %s" % (resource, event, kwargs))
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if resource == resources.SECURITY_GROUP_RULE:
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context = kwargs['context']
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if event == events.BEFORE_DELETE:
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rule_id = kwargs['security_group_rule_id']
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self._delete_secgrp_rule(context, rule_id)
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elif event == events.BEFORE_UPDATE:
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rule_id = kwargs['security_group_rule_id']
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self._update_secgrp_rule(context, rule_id)
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elif event == events.BEFORE_CREATE:
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rule = kwargs['security_group_rule']
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self._validate_secgrp_rule(rule)
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elif resource == resources.SECURITY_GROUP:
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if event == events.BEFORE_DELETE:
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context = kwargs['context']
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security_group_id = kwargs['security_group_id']
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self._delete_secgrp(context, security_group_id)
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elif event == events.BEFORE_RESPONSE:
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if kwargs['method_name'] == 'security_group.create.end':
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context = kwargs['context']
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secgrp = kwargs['data']['security_group']
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self._validate_secgrp(context, secgrp)
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