Load Balancing as a Service (LBaaS) for OpenStack
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octavia/octavia/amphorae/backends/agent/api_server/server.py

248 lines
11 KiB

# Copyright 2015 Hewlett-Packard Development Company, L.P.
#
# 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 os
import stat
import flask
from oslo_config import cfg
from oslo_log import log as logging
import webob
from werkzeug import exceptions
from octavia.amphorae.backends.agent import api_server
from octavia.amphorae.backends.agent.api_server import amphora_info
from octavia.amphorae.backends.agent.api_server import certificate_update
from octavia.amphorae.backends.agent.api_server import keepalived
from octavia.amphorae.backends.agent.api_server import loadbalancer
from octavia.amphorae.backends.agent.api_server import osutils
from octavia.amphorae.backends.agent.api_server import plug
from octavia.amphorae.backends.agent.api_server import udp_listener_base
from octavia.amphorae.backends.agent.api_server import util
BUFFER = 1024
CONF = cfg.CONF
PATH_PREFIX = '/' + api_server.VERSION
LOG = logging.getLogger(__name__)
# make the error pages all json
def make_json_error(ex):
code = ex.code if isinstance(ex, exceptions.HTTPException) else 500
response = webob.Response(json={'error': str(ex), 'http_code': code})
response.status_code = code
return response
def register_app_error_handler(app):
for code in exceptions.default_exceptions:
app.register_error_handler(code, make_json_error)
class Server(object):
def __init__(self):
self.app = flask.Flask(__name__)
self._osutils = osutils.BaseOS.get_os_util()
self._keepalived = keepalived.Keepalived()
self._loadbalancer = loadbalancer.Loadbalancer()
self._udp_listener = (udp_listener_base.UdpListenerApiServerBase.
get_server_driver())
self._plug = plug.Plug(self._osutils)
self._amphora_info = amphora_info.AmphoraInfo(self._osutils)
register_app_error_handler(self.app)
self.app.add_url_rule(rule='/', view_func=self.version_discovery,
methods=['GET'])
self.app.add_url_rule(rule=PATH_PREFIX +
'/loadbalancer/<amphora_id>/<lb_id>/haproxy',
view_func=self.upload_haproxy_config,
methods=['PUT'])
self.app.add_url_rule(rule=PATH_PREFIX +
'/listeners/<amphora_id>/<listener_id>'
'/udp_listener',
view_func=self.upload_udp_listener_config,
methods=['PUT'])
self.app.add_url_rule(rule=PATH_PREFIX +
'/loadbalancer/<lb_id>/haproxy',
view_func=self.get_haproxy_config,
methods=['GET'])
self.app.add_url_rule(rule=PATH_PREFIX +
'/listeners/<listener_id>/udp_listener',
view_func=self.get_udp_listener_config,
methods=['GET'])
self.app.add_url_rule(rule=PATH_PREFIX +
'/loadbalancer/<object_id>/<action>',
view_func=self.start_stop_lb_object,
methods=['PUT'])
self.app.add_url_rule(rule=PATH_PREFIX + '/listeners/<object_id>',
view_func=self.delete_lb_object,
methods=['DELETE'])
self.app.add_url_rule(rule=PATH_PREFIX + '/config',
view_func=self.upload_config,
methods=['PUT'])
self.app.add_url_rule(rule=PATH_PREFIX + '/details',
view_func=self.get_details,
methods=['GET'])
self.app.add_url_rule(rule=PATH_PREFIX + '/info',
view_func=self.get_info,
methods=['GET'])
self.app.add_url_rule(rule=PATH_PREFIX + '/listeners',
view_func=self.get_all_listeners_status,
methods=['GET'])
self.app.add_url_rule(rule=PATH_PREFIX + '/loadbalancer/<lb_id>'
'/certificates/<filename>',
view_func=self.upload_certificate,
methods=['PUT'])
self.app.add_url_rule(rule=PATH_PREFIX + '/loadbalancer/<lb_id>'
'/certificates/<filename>',
view_func=self.get_certificate_md5,
methods=['GET'])
self.app.add_url_rule(rule=PATH_PREFIX + '/loadbalancer/<lb_id>'
'/certificates/<filename>',
view_func=self.delete_certificate,
methods=['DELETE'])
self.app.add_url_rule(rule=PATH_PREFIX + '/plug/vip/<vip>',
view_func=self.plug_vip,
methods=['POST'])
self.app.add_url_rule(rule=PATH_PREFIX + '/plug/network',
view_func=self.plug_network,
methods=['POST'])
self.app.add_url_rule(rule=PATH_PREFIX + '/certificate',
view_func=self.upload_cert, methods=['PUT'])
self.app.add_url_rule(rule=PATH_PREFIX + '/vrrp/upload',
view_func=self.upload_vrrp_config,
methods=['PUT'])
self.app.add_url_rule(rule=PATH_PREFIX + '/vrrp/<action>',
view_func=self.manage_service_vrrp,
methods=['PUT'])
self.app.add_url_rule(rule=PATH_PREFIX + '/interface/<ip_addr>',
view_func=self.get_interface,
methods=['GET'])
def upload_haproxy_config(self, amphora_id, lb_id):
return self._loadbalancer.upload_haproxy_config(amphora_id, lb_id)
def upload_udp_listener_config(self, amphora_id, listener_id):
return self._udp_listener.upload_udp_listener_config(listener_id)
def get_haproxy_config(self, lb_id):
return self._loadbalancer.get_haproxy_config(lb_id)
def get_udp_listener_config(self, listener_id):
return self._udp_listener.get_udp_listener_config(listener_id)
def start_stop_lb_object(self, object_id, action):
protocol = util.get_protocol_for_lb_object(object_id)
if protocol == 'UDP':
return self._udp_listener.manage_udp_listener(
listener_id=object_id, action=action)
return self._loadbalancer.start_stop_lb(lb_id=object_id, action=action)
def delete_lb_object(self, object_id):
protocol = util.get_protocol_for_lb_object(object_id)
if protocol == 'UDP':
return self._udp_listener.delete_udp_listener(object_id)
return self._loadbalancer.delete_lb(object_id)
def get_details(self):
return self._amphora_info.compile_amphora_details(
extend_udp_driver=self._udp_listener)
def get_info(self):
return self._amphora_info.compile_amphora_info(
extend_udp_driver=self._udp_listener)
def get_all_listeners_status(self):
udp_listeners = self._udp_listener.get_all_udp_listeners_status()
return self._loadbalancer.get_all_listeners_status(
other_listeners=udp_listeners)
def upload_certificate(self, lb_id, filename):
return self._loadbalancer.upload_certificate(lb_id, filename)
def get_certificate_md5(self, lb_id, filename):
return self._loadbalancer.get_certificate_md5(lb_id, filename)
def delete_certificate(self, lb_id, filename):
return self._loadbalancer.delete_certificate(lb_id, filename)
def plug_vip(self, vip):
# Catch any issues with the subnet info json
try:
net_info = flask.request.get_json()
assert type(net_info) is dict
assert 'subnet_cidr' in net_info
assert 'gateway' in net_info
assert 'mac_address' in net_info
except Exception:
raise exceptions.BadRequest(
description='Invalid subnet information')
return self._plug.plug_vip(vip,
net_info['subnet_cidr'],
net_info['gateway'],
net_info['mac_address'],
net_info.get('mtu'),
net_info.get('vrrp_ip'),
net_info.get('host_routes'))
def plug_network(self):
try:
port_info = flask.request.get_json()
assert type(port_info) is dict
assert 'mac_address' in port_info
except Exception:
raise exceptions.BadRequest(description='Invalid port information')
return self._plug.plug_network(port_info['mac_address'],
port_info.get('fixed_ips'),
port_info.get('mtu'))
def upload_cert(self):
return certificate_update.upload_server_cert()
def upload_vrrp_config(self):
return self._keepalived.upload_keepalived_config()
def manage_service_vrrp(self, action):
return self._keepalived.manager_keepalived_service(action)
def get_interface(self, ip_addr):
return self._amphora_info.get_interface(ip_addr)
def upload_config(self):
try:
stream = flask.request.stream
file_path = cfg.find_config_files(project=CONF.project,
prog=CONF.prog)[0]
flags = os.O_WRONLY | os.O_CREAT | os.O_TRUNC
# mode 00600
mode = stat.S_IRUSR | stat.S_IWUSR
with os.fdopen(os.open(file_path, flags, mode), 'wb') as cfg_file:
b = stream.read(BUFFER)
while b:
cfg_file.write(b)
b = stream.read(BUFFER)
CONF.mutate_config_files()
except Exception as e:
LOG.error("Unable to update amphora-agent configuration: "
"{}".format(str(e)))
return webob.Response(json=dict(
message="Unable to update amphora-agent configuration.",
details=str(e)), status=500)
return webob.Response(json={'message': 'OK'}, status=202)
def version_discovery(self):
return webob.Response(json={'api_version': api_server.VERSION})