# Copyright 2015 Hewlett-Packard Development Company, L.P. # Copyright (c) 2015 Rackspace # # 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. import functools import hashlib import time import warnings from oslo_log import log as logging import requests import six from stevedore import driver as stevedore_driver from octavia.amphorae.driver_exceptions import exceptions as driver_except from octavia.amphorae.drivers import driver_base as driver_base from octavia.amphorae.drivers.haproxy import exceptions as exc from octavia.amphorae.drivers.keepalived import vrrp_rest_driver from octavia.common.config import cfg from octavia.common import constants from octavia.common.jinja.haproxy import jinja_cfg from octavia.common.tls_utils import cert_parser from octavia.i18n import _LW LOG = logging.getLogger(__name__) API_VERSION = constants.API_VERSION OCTAVIA_API_CLIENT = ( "Octavia HaProxy Rest Client/{version} " "(https://wiki.openstack.org/wiki/Octavia)").format(version=API_VERSION) CONF = cfg.CONF CONF.import_group('haproxy_amphora', 'octavia.common.config') class HaproxyAmphoraLoadBalancerDriver( driver_base.AmphoraLoadBalancerDriver, vrrp_rest_driver.KeepalivedAmphoraDriverMixin): def __init__(self): super(HaproxyAmphoraLoadBalancerDriver, self).__init__() self.client = AmphoraAPIClient() self.cert_manager = stevedore_driver.DriverManager( namespace='octavia.cert_manager', name=CONF.certificates.cert_manager, invoke_on_load=True, ).driver self.jinja = jinja_cfg.JinjaTemplater( base_amp_path=CONF.haproxy_amphora.base_path, base_crt_dir=CONF.haproxy_amphora.base_cert_dir, haproxy_template=CONF.haproxy_amphora.haproxy_template) def update(self, listener, vip): LOG.debug("Amphora %s haproxy, updating listener %s, vip %s", self.__class__.__name__, listener.protocol_port, vip.ip_address) # Process listener certificate info certs = self._process_tls_certificates(listener) # Generate HaProxy configuration from listener object config = self.jinja.build_config(listener, certs['tls_cert']) for amp in listener.load_balancer.amphorae: if amp.status != constants.DELETED: self.client.upload_config(amp, listener.id, config) # todo (german): add a method to REST interface to reload or # start without having to check # Is that listener running? r = self.client.get_listener_status(amp, listener.id) if r['status'] == 'ACTIVE': self.client.reload_listener(amp, listener.id) else: self.client.start_listener(amp, listener.id) def upload_cert_amp(self, amp, pem): LOG.debug("Amphora %s updating cert in REST driver " "with amphora id %s,", self.__class__.__name__, amp.id) self.client.update_cert_for_rotation(amp, pem) def _apply(self, func, listener=None, *args): for amp in listener.load_balancer.amphorae: if amp.status != constants.DELETED: func(amp, listener.id, *args) def stop(self, listener, vip): self._apply(self.client.stop_listener, listener) def start(self, listener, vip): self._apply(self.client.start_listener, listener) def delete(self, listener, vip): self._apply(self.client.delete_listener, listener) def get_info(self, amphora): self.driver.get_info(amphora.lb_network_ip) def get_diagnostics(self, amphora): self.driver.get_diagnostics(amphora.lb_network_ip) def finalize_amphora(self, amphora): pass def post_vip_plug(self, load_balancer, amphorae_network_config): for amp in load_balancer.amphorae: if amp.status != constants.DELETED: subnet = amphorae_network_config.get(amp.id).vip_subnet # NOTE(blogan): using the vrrp port here because that # is what the allowed address pairs network driver sets # this particular port to. This does expose a bit of # tight coupling between the network driver and amphora # driver. We will need to revisit this to try and remove # this tight coupling. port = amphorae_network_config.get(amp.id).vrrp_port net_info = {'subnet_cidr': subnet.cidr, 'gateway': subnet.gateway_ip, 'mac_address': port.mac_address} self.client.plug_vip(amp, load_balancer.vip.ip_address, net_info) def post_network_plug(self, amphora, port): port_info = {'mac_address': port.mac_address} self.client.plug_network(amphora, port_info) def get_vrrp_interface(self, amphora): return self.client.get_interface(amphora, amphora.vrrp_ip)['interface'] def _process_tls_certificates(self, listener): """Processes TLS data from the listener. Converts and uploads PEM data to the Amphora API return TLS_CERT and SNI_CERTS """ tls_cert = None sni_certs = [] certs = [] data = cert_parser.load_certificates_data( self.cert_manager, listener) if data['tls_cert'] is not None: tls_cert = data['tls_cert'] certs.append(tls_cert) if data['sni_certs']: sni_certs = data['sni_certs'] certs.extend(sni_certs) for cert in certs: pem = cert_parser.build_pem(cert) md5 = hashlib.md5(six.b(pem)).hexdigest() name = '{cn}.pem'.format(cn=cert.primary_cn) self._apply(self._upload_cert, listener, pem, md5, name) return {'tls_cert': tls_cert, 'sni_certs': sni_certs} def _upload_cert(self, amp, listener_id, pem, md5, name): try: if self.client.get_cert_md5sum(amp, listener_id, name) == md5: return except exc.NotFound: pass self.client.upload_cert_pem( amp, listener_id, name, pem) # Check a custom hostname class CustomHostNameCheckingAdapter(requests.adapters.HTTPAdapter): def cert_verify(self, conn, url, verify, cert): conn.assert_hostname = self.uuid return super(CustomHostNameCheckingAdapter, self).cert_verify(conn, url, verify, cert) class AmphoraAPIClient(object): def __init__(self): super(AmphoraAPIClient, self).__init__() self.secure = False self.get = functools.partial(self.request, 'get') self.post = functools.partial(self.request, 'post') self.put = functools.partial(self.request, 'put') self.delete = functools.partial(self.request, 'delete') self.head = functools.partial(self.request, 'head') self.start_listener = functools.partial(self._action, 'start') self.stop_listener = functools.partial(self._action, 'stop') self.reload_listener = functools.partial(self._action, 'reload') self.start_vrrp = functools.partial(self._vrrp_action, 'start') self.stop_vrrp = functools.partial(self._vrrp_action, 'stop') self.reload_vrrp = functools.partial(self._vrrp_action, 'reload') self.session = requests.Session() self.session.cert = CONF.haproxy_amphora.client_cert self.ssl_adapter = CustomHostNameCheckingAdapter() self.session.mount('https://', self.ssl_adapter) def _base_url(self, ip): return "https://{ip}:{port}/{version}/".format( ip=ip, port=CONF.haproxy_amphora.bind_port, version=API_VERSION) def request(self, method, amp, path='/', **kwargs): LOG.debug("request url %s", path) _request = getattr(self.session, method.lower()) _url = self._base_url(amp.lb_network_ip) + path LOG.debug("request url " + _url) timeout_tuple = (CONF.haproxy_amphora.rest_request_conn_timeout, CONF.haproxy_amphora.rest_request_read_timeout) reqargs = { 'verify': CONF.haproxy_amphora.server_ca, 'url': _url, 'timeout': timeout_tuple, } reqargs.update(kwargs) headers = reqargs.setdefault('headers', {}) headers['User-Agent'] = OCTAVIA_API_CLIENT self.ssl_adapter.uuid = amp.id # Keep retrying for a in six.moves.xrange(CONF.haproxy_amphora.connection_max_retries): try: with warnings.catch_warnings(): warnings.filterwarnings( "ignore", message="A true SSLContext object is not available" ) r = _request(**reqargs) except (requests.ConnectionError, requests.Timeout): LOG.warning(_LW("Could not connect to instance. Retrying.")) time.sleep(CONF.haproxy_amphora.connection_retry_interval) if a >= CONF.haproxy_amphora.connection_max_retries: raise driver_except.TimeOutException() else: return r raise driver_except.UnavailableException() def upload_config(self, amp, listener_id, config): r = self.put( amp, 'listeners/{amphora_id}/{listener_id}/haproxy'.format( amphora_id=amp.id, listener_id=listener_id), data=config) return exc.check_exception(r) def get_listener_status(self, amp, listener_id): r = self.get( amp, 'listeners/{listener_id}'.format(listener_id=listener_id)) if exc.check_exception(r): return r.json() def _action(self, action, amp, listener_id): r = self.put(amp, 'listeners/{listener_id}/{action}'.format( listener_id=listener_id, action=action)) return exc.check_exception(r) def upload_cert_pem(self, amp, listener_id, pem_filename, pem_file): r = self.put( amp, 'listeners/{listener_id}/certificates/{filename}'.format( listener_id=listener_id, filename=pem_filename), data=pem_file) return exc.check_exception(r) def update_cert_for_rotation(self, amp, pem_file): r = self.put(amp, 'certificate', data=pem_file) return exc.check_exception(r) def get_cert_md5sum(self, amp, listener_id, pem_filename): r = self.get(amp, 'listeners/{listener_id}/certificates/{filename}'.format( listener_id=listener_id, filename=pem_filename)) if exc.check_exception(r): return r.json().get("md5sum") def delete_listener(self, amp, listener_id): r = self.delete( amp, 'listeners/{listener_id}'.format(listener_id=listener_id)) return exc.check_exception(r) def get_info(self, amp): r = self.get(amp, "info") if exc.check_exception(r): return r.json() def get_details(self, amp): r = self.get(amp, "details") if exc.check_exception(r): return r.json() def get_all_listeners(self, amp): r = self.get(amp, "listeners") if exc.check_exception(r): return r.json() def delete_cert_pem(self, amp, listener_id, pem_filename): r = self.delete( amp, 'listeners/{listener_id}/certificates/{filename}'.format( listener_id=listener_id, filename=pem_filename)) return exc.check_exception(r) def plug_network(self, amp, port): r = self.post(amp, 'plug/network', json=port) return exc.check_exception(r) def plug_vip(self, amp, vip, net_info): r = self.post(amp, 'plug/vip/{vip}'.format(vip=vip), json=net_info) return exc.check_exception(r) def upload_vrrp_config(self, amp, config): r = self.put(amp, 'vrrp/upload', data=config) return exc.check_exception(r) def _vrrp_action(self, action, amp): r = self.put(amp, 'vrrp/{action}'.format(action=action)) return exc.check_exception(r) def get_interface(self, amp, ip_addr): r = self.get(amp, 'interface/{ip_addr}'.format(ip_addr=ip_addr)) if exc.check_exception(r): return r.json()