Source code for octavia.amphorae.backends.health_daemon.health_sender

#    Copyright 2014 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
#    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 socket

from oslo_config import cfg
from oslo_log import log as logging

from octavia.amphorae.backends.health_daemon import status_message

LOG = logging.getLogger(__name__)

[docs]def round_robin_addr(addrinfo_list): if not addrinfo_list: return None addrinfo = addrinfo_list.pop(0) addrinfo_list.append(addrinfo) return addrinfo
[docs]class UDPStatusSender(object): def __init__(self): self._update_dests() self.v4sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) self.v6sock = socket.socket(socket.AF_INET6, socket.SOCK_DGRAM)
[docs] def update(self, dest, port): addrlist = socket.getaddrinfo(dest, port, 0, socket.SOCK_DGRAM) # addrlist = [(family, socktype, proto, canonname, sockaddr) ...] # e.g. 4 = sockaddr - what we actually need for addr in addrlist: self.dests.append(addr) # Just grab the first match break
def _send_msg(self, dest, msg): # Note: heartbeat_key is mutable and must be looked up for each call envelope_str = status_message.wrap_envelope( msg, str(CONF.health_manager.heartbeat_key)) # dest = (family, socktype, proto, canonname, sockaddr) # e.g. 0 = sock family, 4 = sockaddr - what we actually need try: if dest[0] == socket.AF_INET: self.v4sock.sendto(envelope_str, dest[4]) elif dest[0] == socket.AF_INET6: self.v6sock.sendto(envelope_str, dest[4]) except socket.error: # Pass here as on amp boot it will get one or more # error: [Errno 101] Network is unreachable # while the networks are coming up # No harm in trying to send as it will still failover # if the message isn't received pass # The controller_ip_port_list configuration has mutated, reload it. def _update_dests(self): self.dests = [] for ipport in CONF.health_manager.controller_ip_port_list: try: ip, port = ipport.rsplit(':', 1) except ValueError: LOG.error("Invalid ip and port '%s' in health_manager " "controller_ip_port_list", ipport) break self.update(ip, port) self.current_controller_ip_port_list = ( CONF.health_manager.controller_ip_port_list)
[docs] def dosend(self, obj): # Check for controller_ip_port_list mutation if not (self.current_controller_ip_port_list == CONF.health_manager.controller_ip_port_list): self._update_dests() dest = round_robin_addr(self.dests) if dest is None: LOG.error('No controller address found. Unable to send heartbeat.') return self._send_msg(dest, obj)