Commit ad6f5f02 authored by Justin's avatar Justin

promise/plugin: add check_network promise

parent 6d33c8c5
import psutil
from zope.interface import implementer
from slapos.grid.promise import interface
from slapos.grid.promise.generic import GenericPromise
@implementer(interface.IPromise)
class RunPromise(GenericPromise):
def __init__(self, config):
super(RunPromise, self).__init__(config)
self.setPeriodicity(minute=5)
def sense(self):
promise_success = True
# Get reference values
max_lost_packets = int(self.getConfig('max-lost-packets', 100))
max_error_messages = int(self.getConfig('max-error-messages', 100))
# Get current Network statistics
network_data = psutil.net_io_counters() # Check for args if useful
total_dropped = network_data.dropin + network_data.dropout
total_errors = network_data.errin + network_data.errout
# Check for network dropped packets
if total_dropped >= max_lost_packets:
self.logger.error("Network packets lost reached critical threshold: %s "\
" (threshold is %s)" % (total_dropped, max_lost_packets))
promise_success = False
# Check for network errors
if total_errors >= max_error_messages:
self.logger.error("Network errors reached critical threshold: %s "\
" (threshold is %s)" % (total_errors, max_error_messages))
promise_success = False
if promise_success:
self.logger.info("Network statistics OK")
def test(self):
"""
Called after sense() if the instance is still converging.
Returns success or failure based on sense results.
In this case, fail if the previous sensor result is negative.
"""
return self._test(result_count=1, failure_amount=1)
def anomaly(self):
"""
Called after sense() if the instance has finished converging.
Returns success or failure based on sense results.
Failure signals the instance has diverged.
In this case, fail if two out of the last three results are negative.
"""
return self._anomaly(result_count=3, failure_amount=2)
# -*- coding: utf-8 -*-
##############################################################################
# Copyright (c) 2022 Vifib SARL and Contributors. All Rights Reserved.
#
# WARNING: This program as such is intended to be used by professional
# programmers who take the whole responsibility of assessing all potential
# consequences resulting from its eventual inadequacies and bugs
# End users who are looking for a ready-to-use solution with commercial
# guarantees and support are strongly advised to contract a Free Software
# Service Company
#
# This program is Free Software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
##############################################################################
import mock
from collections import namedtuple
from slapos.grid.promise import PromiseError
from slapos.promise.plugin.check_network import RunPromise
from . import TestPromisePluginMixin
class TestCheckNetwork(TestPromisePluginMixin):
promise_name = "monitor-network.py"
def setUp(self):
super(TestCheckNetwork, self).setUp()
def writePromise(self, **kw):
super(TestCheckNetwork, self).writePromise(self.promise_name,
"from %s import %s\nextra_config_dict = %r\n"
% (RunPromise.__module__, RunPromise.__name__, kw))
def runPromise(self, summary, failed=False):
self.configureLauncher(enable_anomaly=True, force=True)
with mock.patch('psutil.net_io_counters', return_value=summary):
if failed:
self.assertRaises(PromiseError, self.launcher.run)
else:
self.launcher.run()
result = self.getPromiseResult(self.promise_name)['result']
self.assertEqual(result['failed'], failed)
return result['message']
def test_network_ok(self):
message = "Network statistics OK"
network_data = namedtuple('network_data', ['errin', 'errout', 'dropin', 'dropout'])
mock_stats = {'errin':0, 'errout':0, 'dropin':0, 'dropout':0}
self.writePromise(**{
'max-lost-packets': 5,
'max-error-messages': 5,
})
self.assertEqual(message, self.runPromise(network_data(**mock_stats)))
def test_network_dropped_packets_nok(self):
message = "Network packets lost reached critical threshold: 10 (threshold is 5)"
network_data = namedtuple('network_data', ['errin', 'errout', 'dropin', 'dropout'])
mock_stats = {'errin':0, 'errout':0, 'dropin':5, 'dropout':5}
self.writePromise(**{
'max-lost-packets': 5,
'max-error-messages': 5,
})
self.assertEqual(message, self.runPromise(network_data(**mock_stats)))
def test_network_errors_nok(self):
message = "Network errors reached critical threshold: 10 (threshold is 5)"
network_data = namedtuple('network_data', ['errin', 'errout', 'dropin', 'dropout'])
mock_stats = {'errin':5, 'errout':5, 'dropin':0, 'dropout':0}
self.writePromise(**{
'max-lost-packets': 5,
'max-error-messages': 5,
})
self.assertEqual(message, self.runPromise(network_data(**mock_stats)))
def test_network_nok(self):
message = "Network packets lost reached critical threshold: 10 (threshold is 5)"\
"\nNetwork errors reached critical threshold: 10 (threshold is 5)"
network_data = namedtuple('network_data', ['errin', 'errout', 'dropin', 'dropout'])
mock_stats = {'errin':5, 'errout':5, 'dropin':5, 'dropout':5}
self.writePromise(**{
'max-lost-packets': 5,
'max-error-messages': 5,
})
self.assertEqual(message, self.runPromise(network_data(**mock_stats)))
if __name__ == '__main__':
unittest.main()
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