181 lines
7.1 KiB
Python
181 lines
7.1 KiB
Python
# Copyright 2017 VMware, Inc.
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# All Rights Reserved
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from neutron.db import l3_db
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from neutron.services.flavors import flavors_plugin
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from neutron_lib import exceptions as n_exc
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from vmware_nsx._i18n import _
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from vmware_nsx.db import db as nsx_db
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from vmware_nsx.services.lbaas import lb_const
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from vmware_nsxlib.v3 import utils
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def get_tags(plugin, resource_id, resource_type, project_id, project_name):
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resource = {'project_id': project_id,
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'id': resource_id}
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tags = plugin.nsxlib.build_v3_tags_payload(
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resource, resource_type=resource_type,
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project_name=project_name)
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return tags
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def get_network_from_subnet(context, plugin, subnet_id):
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subnet = plugin.get_subnet(context, subnet_id)
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if subnet:
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return plugin.get_network(context, subnet['network_id'])
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def get_router_from_network(context, plugin, subnet_id):
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subnet = plugin.get_subnet(context, subnet_id)
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network_id = subnet['network_id']
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port_filters = {'device_owner': [l3_db.DEVICE_OWNER_ROUTER_INTF],
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'network_id': [network_id]}
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ports = plugin.get_ports(context, filters=port_filters)
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if ports:
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return ports[0]['device_id']
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def get_lb_router_id(context, plugin, lb):
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router_client = plugin.nsxlib.logical_router
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name = utils.get_name_and_uuid(lb.name or 'router', lb.id)
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tags = get_tags(plugin, lb.id, lb_const.LB_LB_TYPE, lb.tenant_id,
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context.project_name)
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edge_cluster_uuid = plugin._get_edge_cluster(plugin._default_tier0_router)
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lb_router = router_client.create(name, tags, edge_cluster_uuid)
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return lb_router
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def get_lb_flavor_size(flavor_plugin, context, flavor_id):
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if not flavor_id:
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return lb_const.DEFAULT_LB_SIZE
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else:
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flavor = flavors_plugin.FlavorsPlugin.get_flavor(
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flavor_plugin, context, flavor_id)
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flavor_size = flavor['name']
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if flavor_size in lb_const.LB_FLAVOR_SIZES:
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return flavor_size.upper()
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else:
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err_msg = (_("Invalid flavor size %(flavor)s, only 'small', "
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"'medium', or 'large' are supported") %
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{'flavor': flavor_size})
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raise n_exc.InvalidInput(error_message=err_msg)
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def validate_lb_subnet(context, plugin, subnet_id):
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'''Validate LB subnet before creating loadbalancer on it.
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To create a loadbalancer, the network has to be either an external
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network or private network that connects to a tenant router. It will
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throw exception if the network doesn't meet this requirement.
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:param context: context
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:param plugin: core plugin
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:param subnet_id: loadbalancer's subnet id
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:return: True if subnet meet requirement, otherwise return False
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'''
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network = get_network_from_subnet(context, plugin, subnet_id)
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router_id = get_router_from_network(
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context, plugin, subnet_id)
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if network.get('router:external') or router_id:
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return True
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else:
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return False
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def get_rule_match_conditions(policy):
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match_conditions = []
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# values in rule have already been validated in LBaaS API,
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# we won't need to valid anymore in driver, and just get
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# the LB rule mapping from the dict.
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for rule in policy.rules:
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match_type = lb_const.LB_RULE_MATCH_TYPE[rule.compare_type]
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if rule.type == lb_const.L7_RULE_TYPE_COOKIE:
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header_value = rule.key + '=' + rule.value
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match_conditions.append(
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{'type': 'LbHttpRequestHeaderCondition',
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'match_type': match_type,
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'header_name': 'Cookie',
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'header_value': header_value})
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elif rule.type == lb_const.L7_RULE_TYPE_FILE_TYPE:
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match_conditions.append(
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{'type': 'LbHttpRequestUriCondition',
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'match_type': match_type,
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'uri': '*.' + rule.value})
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elif rule.type == lb_const.L7_RULE_TYPE_HEADER:
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match_conditions.append(
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{'type': 'LbHttpRequestHeaderCondition',
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'match_type': match_type,
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'header_name': rule.key,
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'header_value': rule.value})
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elif rule.type == lb_const.L7_RULE_TYPE_HOST_NAME:
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match_conditions.append(
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{'type': 'LbHttpRequestHeaderCondition',
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'match_type': match_type,
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'header_name': 'Host',
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'header_value': rule.value})
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elif rule.type == lb_const.L7_RULE_TYPE_PATH:
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match_conditions.append(
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{'type': 'LbHttpRequestUriCondition',
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'match_type': match_type,
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'uri': rule.value})
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else:
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msg = (_('l7rule type %(type)s is not supported in LBaaS') %
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{'type': rule.type})
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raise n_exc.BadRequest(resource='lbaas-l7rule', msg=msg)
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return match_conditions
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def get_rule_actions(context, l7policy):
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lb_id = l7policy.listener.loadbalancer_id
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if l7policy.action == lb_const.L7_POLICY_ACTION_REDIRECT_TO_POOL:
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pool_binding = nsx_db.get_nsx_lbaas_pool_binding(
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context.session, lb_id, l7policy.redirect_pool_id)
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if pool_binding:
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lb_pool_id = pool_binding['lb_pool_id']
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actions = [{'type': lb_const.LB_SELECT_POOL_ACTION,
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'pool_id': lb_pool_id}]
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else:
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msg = _('Failed to get LB pool binding from nsx db')
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raise n_exc.BadRequest(resource='lbaas-l7rule-create',
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msg=msg)
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elif l7policy.action == lb_const.L7_POLICY_ACTION_REDIRECT_TO_URL:
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actions = [{'type': lb_const.LB_HTTP_REDIRECT_ACTION,
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'redirect_status': lb_const.LB_HTTP_REDIRECT_STATUS,
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'redirect_url': l7policy.redirect_url}]
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elif l7policy.action == lb_const.L7_POLICY_ACTION_REJECT:
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actions = [{'type': lb_const.LB_REJECT_ACTION,
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'reply_status': lb_const.LB_HTTP_REJECT_STATUS}]
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else:
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msg = (_('Invalid l7policy action: %(action)s') %
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{'action': l7policy.action})
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raise n_exc.BadRequest(resource='lbaas-l7rule-create',
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msg=msg)
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return actions
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def convert_l7policy_to_lb_rule(context, policy):
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return {
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'match_conditions': get_rule_match_conditions(policy),
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'actions': get_rule_actions(context, policy),
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'phase': lb_const.LB_RULE_HTTP_FORWARDING,
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'match_strategy': 'ALL'
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}
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def remove_rule_from_policy(rule):
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l7rules = rule.policy.rules
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rule.policy.rules = [r for r in l7rules if r.id != rule.id]
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