# octavia.amphorae.backends.health_daemon.health_sender

# 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
    #
    #         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 socket

    from oslo_config import cfg
    from oslo_log import log as logging

    from octavia.amphorae.backends.health_daemon import status_message

    CONF = cfg.CONF
    LOG = logging.getLogger(__name__)

    def round_robin_addr(addrinfo_list):
        if not addrinfo_list:
            return None
        addrinfo = addrinfo_list.pop(0)
        addrinfo_list.append(addrinfo)
        return addrinfo

    class UDPStatusSender:
        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)

        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 OSError:
                # 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)
                    if ip and ip[0] == '[' and ip[-1] == ']':
                        ip = ip[1:-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)

        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)

this page last updated: 2026-04-13 15:26:39

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