/usr/lib/python3/dist-packages/glances/exports/glances_zeromq.py is in glances 2.11.1-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 | # -*- coding: utf-8 -*-
#
# This file is part of Glances.
#
# Copyright (C) 2017 Nicolargo <nicolas@nicolargo.com>
#
# Glances is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Glances is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""ZeroMQ interface class."""
import sys
import json
from glances.compat import b
from glances.logger import logger
from glances.exports.glances_export import GlancesExport
import zmq
from zmq.utils.strtypes import asbytes
class Export(GlancesExport):
"""This class manages the ZeroMQ export module."""
def __init__(self, config=None, args=None):
"""Init the ZeroMQ export IF."""
super(Export, self).__init__(config=config, args=args)
# Mandatories configuration keys (additional to host and port)
self.prefix = None
# Optionals configuration keys
# N/A
# Load the ZeroMQ configuration file section ([export_zeromq])
self.export_enable = self.load_conf('zeromq',
mandatories=['host', 'port', 'prefix'],
options=[])
if not self.export_enable:
sys.exit(2)
# Init the ZeroMQ context
self.context = None
self.client = self.init()
def init(self):
"""Init the connection to the CouchDB server."""
if not self.export_enable:
return None
server_uri = 'tcp://{}:{}'.format(self.host, self.port)
try:
self.context = zmq.Context()
publisher = self.context.socket(zmq.PUB)
publisher.bind(server_uri)
except Exception as e:
logger.critical("Cannot connect to ZeroMQ server %s (%s)" % (server_uri, e))
sys.exit(2)
else:
logger.info("Connected to the ZeroMQ server %s" % server_uri)
return publisher
def exit(self):
"""Close the socket and context"""
if self.client is not None:
self.client.close()
if self.context is not None:
self.context.destroy()
def export(self, name, columns, points):
"""Write the points to the ZeroMQ server."""
logger.debug("Export {} stats to ZeroMQ".format(name))
# Create DB input
data = dict(zip(columns, points))
# Do not publish empty stats
if data == {}:
return False
# Glances envelopes the stats in a publish message with two frames:
# - First frame containing the following prefix (STRING)
# - Second frame with the Glances plugin name (STRING)
# - Third frame with the Glances plugin stats (JSON)
message = [b(self.prefix),
b(name),
asbytes(json.dumps(data))]
# Write data to the ZeroMQ bus
# Result can be view: tcp://host:port
try:
self.client.send_multipart(message)
except Exception as e:
logger.error("Cannot export {} stats to ZeroMQ ({})".format(name, e))
return True
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