# Copyright (c) 2013 Hortonworks, Inc. # # 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 shlex from eventlet.green import subprocess as e_subprocess from neutronclient.neutron import client as neutron_cli import requests from requests import adapters from sahara import context from sahara import exceptions as ex from sahara.i18n import _ from sahara.openstack.common import log as logging from sahara.utils.openstack import base LOG = logging.getLogger(__name__) def client(): ctx = context.ctx() args = { 'username': ctx.username, 'tenant_name': ctx.tenant_name, 'tenant_id': ctx.tenant_id, 'token': ctx.token, 'endpoint_url': base.url_for(ctx.service_catalog, 'network') } return neutron_cli.Client('2.0', **args) class NeutronClientRemoteWrapper(): neutron = None adapters = {} routers = {} def __init__(self, network, uri, token, tenant_name): self.neutron = neutron_cli.Client('2.0', endpoint_url=uri, token=token, tenant_name=tenant_name) self.network = network def get_router(self): matching_router = NeutronClientRemoteWrapper.routers.get(self.network, None) if matching_router: LOG.debug('Returning cached qrouter') return matching_router['id'] routers = self.neutron.list_routers()['routers'] for router in routers: device_id = router['id'] ports = self.neutron.list_ports(device_id=device_id)['ports'] port = next((port for port in ports if port['network_id'] == self.network), None) if port: matching_router = router NeutronClientRemoteWrapper.routers[ self.network] = matching_router break if not matching_router: raise ex.SystemError(_('Neutron router corresponding to network ' '%s is not found') % self.network) return matching_router['id'] def get_http_session(self, host, port=None, use_rootwrap=False, rootwrap_command=None, *args, **kwargs): session = requests.Session() adapters = self._get_adapters(host, port=port, use_rootwrap=use_rootwrap, rootwrap_command=rootwrap_command, *args, **kwargs) for adapter in adapters: session.mount('http://{0}:{1}'.format(host, adapter.port), adapter) return session def _get_adapters(self, host, port=None, use_rootwrap=False, rootwrap_command=None, *args, **kwargs): LOG.debug('Retrieving neutron adapters for {0}:{1}'.format(host, port)) adapters = [] if not port: # returning all registered adapters for given host adapters = [adapter for adapter in self.adapters if adapter.host == host] else: # need to retrieve or create specific adapter adapter = self.adapters.get((host, port), None, *args, **kwargs) if not adapter: LOG.debug('Creating neutron adapter for {0}:{1}' .format(host, port)) qrouter = self.get_router() adapter = ( NeutronHttpAdapter(qrouter, host, port, use_rootwrap=use_rootwrap, rootwrap_command=rootwrap_command)) self.adapters[(host, port)] = adapter adapters = [adapter] return adapters class NeutronHttpAdapter(adapters.HTTPAdapter): port = None host = None def __init__(self, qrouter, host, port, use_rootwrap=False, rootwrap_command=None, *args, **kwargs): super(NeutronHttpAdapter, self).__init__(*args, **kwargs) command = '{0} ip netns exec qrouter-{1} nc {2} {3}'.format( rootwrap_command if use_rootwrap else '', qrouter, host, port) LOG.debug('Neutron adapter created with cmd {0}'.format(command)) self.cmd = shlex.split(command) self.port = port self.host = host self.rootwrap_command = rootwrap_command if use_rootwrap else None def get_connection(self, url, proxies=None): pool_conn = ( super(NeutronHttpAdapter, self).get_connection(url, proxies)) if hasattr(pool_conn, '_get_conn'): http_conn = pool_conn._get_conn() if http_conn.sock is None: if hasattr(http_conn, 'connect'): sock = self._connect() LOG.debug('HTTP connecction {0} getting new ' 'netcat socket {1}'.format(http_conn, sock)) http_conn.sock = sock else: if hasattr(http_conn.sock, 'is_netcat_socket'): LOG.debug('pooled http connection has existing ' 'netcat socket. resetting pipe...') http_conn.sock.reset() pool_conn._put_conn(http_conn) return pool_conn def close(self): LOG.debug('Closing neutron adapter for {0}:{1}' .format(self.host, self.port)) super(NeutronHttpAdapter, self).close() def _connect(self): LOG.debug('returning netcat socket with command {0}' .format(self.cmd)) return NetcatSocket(self.cmd, rootwrap_command=self.rootwrap_command) class NetcatSocket: def _create_process(self): self.process = e_subprocess.Popen(self.cmd, stdin=e_subprocess.PIPE, stdout=e_subprocess.PIPE, stderr=e_subprocess.PIPE) def __init__(self, cmd, rootwrap_command=None): self.cmd = cmd self.rootwrap_command = rootwrap_command self._create_process() def send(self, content): try: self.process.stdin.write(content) except IOError as e: raise ex.SystemError(e) return len(content) def sendall(self, content): return self.send(content) def makefile(self, mode, *arg): if mode.startswith('r'): return self.process.stdout if mode.startswith('w'): return self.process.stdin raise ex.IncorrectStateError(_("Unknown file mode %s") % mode) def recv(self, size): try: return os.read(self.process.stdout.fileno(), size) except IOError as e: raise ex.SystemError(e) def _terminate(self): if self.rootwrap_command: os.system('{0} kill {1}'.format(self.rootwrap_command, self.process.pid)) else: self.process.terminate() def close(self): LOG.debug('Socket close called') self._terminate() def settimeout(self, timeout): pass def fileno(self): return self.process.stdin.fileno() def is_netcat_socket(self): return True def reset(self): self._terminate() self._create_process()