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check_net_stats_by_ssh.py
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check_net_stats_by_ssh.py
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#!/usr/bin/env python2
# Copyright (C) 2013:
# Gabes Jean, [email protected]
# Pasche Sebastien, [email protected]
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
#
'''
This script is a check for lookup at memory consumption over ssh without
having an agent on the other side
'''
import os
import sys
import optparse
import base64
import subprocess
# Ok try to load our directory to load the plugin utils.
my_dir = os.path.dirname(__file__)
sys.path.insert(0, my_dir)
try:
import schecks
except ImportError:
print "ERROR : this plugin needs the local schecks.py lib. Please install it"
sys.exit(2)
VERSION = "0.1"
DEFAULT_WARNING = '75%'
DEFAULT_CRITICAL = '90%'
DEFAULT_TEMP_FILE = '/tmp/__check_net_stats_by_ssh.tmp'
def get_net_stats(client):
# We are looking for such lines for the first run:
#1366283417 <----- current unixtime on distant server
#ls: cannot access /tmp/__disks_stats6: No such file or directory <----- there was not previous check
#cat: /tmp/__disks_stats6: No such file or directory <----- same here
#tun0: 5264250 7350 0 0 0 0 0 0 1257139 7196 0 0 0 0 0 0 <------- current raw values but we don't really care now
#lo: 13954299 145920 0 0 0 0 0 0 13954299 145920 0 0 0 0 0 0
#eth1: 715774062 699787 0 0 0 0 0 0 81419374 557455 0 0 0 0 0 0
# After the first one we will have
#1366283725 <----- current unixtime on distant server
#1366283423 <----- the modification time of the CHK_FILE, so we know how much time we got between the two checks
#tun0: 5264250 7350 0 0 0 0 0 0 1257139 7196 0 0 0 0 0 0 <------- current raw values but we don't really care now
#lo: 13954299 145920 0 0 0 0 0 0 13954299 145920 0 0 0 0 0 0
#eth1: 715774062 699787 0 0 0 0 0 0 81419374 557455 0 0 0 0 0 0
#tun0: 5264251 7350 0 0 0 0 0 0 1257139 7196 0 0 0 0 0 0 <------- NEW one
#lo: 13954299 145920 0 0 0 0 0 0 13954299 145920 0 0 0 0 0 0
#eth1: 715774062 699787 0 0 0 0 0 0 81419374 557455 0 0 0 0 0 0
# Aboutthe fields
#face |bytes packets errs drop fifo frame compressed multicast|bytes packets errs drop fifo colls carrier compressed
# Beware of the export!
raw = 'CHK_FILE=%s;' % DEFAULT_TEMP_FILE
raw += r"""date +%s;ls -l --time-style=+%s $CHK_FILE | awk '{print $6}';cat $CHK_FILE; sed 1,2d /proc/net/dev | tee $CHK_FILE"""
stdin, stdout, stderr = client.exec_command('export LC_LANG=C && unset LANG && %s' % raw)
errors = [l for l in stderr]
for line in errors:
line = line.strip()
if line.startswith('ls:') and line.endswith('No such file or directory'):
print "OK: the check is initializing"
sys.exit(3)
stats = {}
lines = [line for line in stdout]
if len(lines) < 2:
print "Error: something goes wrong during the command launch sorry"
sys.exit(2)
# We try to get the diff betweenthe file date and now
now = lines.pop(0)
before = lines.pop(0)
diff = int(now) - int(before)
# Ok such things should not be true on day, but we don't really now
if diff <= 0:
diff = 300
# Let's parse al of this
for line in lines:
line = line.strip()
if not line:
continue
tmp = line.split(':', 1)
ifname = tmp[0]
# We don't care about lo
if ifname.startswith('lo') or (excluded_interfaces is not None and ifname.startswith(tuple(excluded_interfaces))):
continue
values = tmp[1]
# By pass the firt line, we already know about it
rx_bytes,rx_packets,rx_errs,rx_drop,_,_,_,rx_multicast,tx_bytes, tx_packets, tx_errs, tx_drop,_,_,_,_ = tuple([int(e) for e in values.split(' ') if e])
if not ifname in stats:
stats[ifname] = []
stats[ifname].append( (rx_bytes,rx_packets,rx_errs,rx_drop, rx_multicast,tx_bytes, tx_packets, tx_errs, tx_drop) )
# Before return, close the client
client.close()
return diff, stats
parser = optparse.OptionParser(
"%prog [options]", version="%prog " + VERSION)
parser.add_option('-H', '--hostname',
dest="hostname", help='Hostname to connect to')
parser.add_option('-p', '--port',
dest="port", type="int", default=22,
help='SSH port to connect to. Default : 22')
parser.add_option('-i', '--ssh-key',
dest="ssh_key_file",
help='SSH key file to use. By default will take ~/.ssh/id_rsa.')
parser.add_option('-u', '--user',
dest="user", help='remote use to use. By default shinken.')
parser.add_option('-P', '--passphrase',
dest="passphrase",
help='SSH key passphrase. By default will use void')
parser.add_option('-w', '--warning',
dest="warning",
help='Warning value for physical used memory. In percent. Default : 75%')
parser.add_option('-c', '--critical',
dest="critical",
help='Critical value for physical used memory. In percent. Must be '
'superior to warning value. Default : 90%')
parser.add_option('-e', '--exclude',
action="append",
dest="exclude",
help='Interfaces to exclude. Can appear several time.')
if __name__ == '__main__':
# Ok first job : parse args
opts, args = parser.parse_args()
if args:
parser.error("Does not accept any argument.")
port = opts.port
hostname = opts.hostname or ''
ssh_key_file = opts.ssh_key_file or os.path.expanduser('~/.ssh/id_rsa')
user = opts.user or 'shinken'
passphrase = opts.passphrase or ''
# Try to get numeic warning/critical values
s_warning = opts.warning or DEFAULT_WARNING
s_critical = opts.critical or DEFAULT_CRITICAL
warning, critical = schecks.get_warn_crit(s_warning, s_critical)
# Get list of excluded interfaces
excluded_interfaces = opts.exclude
# Ok now connect, and try to get values for memory
client = schecks.connect(hostname, port, ssh_key_file, passphrase, user)
diff, stats = get_net_stats(client)
# Maybe we failed at getting data
if not stats:
print "Error : cannot fetch cpu stats values from host"
sys.exit(2)
# We are putting diff into float so we are sure we will have float everywhere
diff = float(diff)
perfdata = []
for (device, v) in stats.iteritems():
if len(v) < 2:
# Ok maybe this disk just disapears or pop up, not a problem
continue
# First the previous ones
p_rx_bytes, p_rx_packets, p_rx_errs, p_rx_drop, p_rx_multicast, p_tx_bytes, p_tx_packets, p_tx_errs, p_tx_drop = v.pop(0)
n_rx_bytes, n_rx_packets, n_rx_errs, n_rx_drop, n_rx_multicast, n_tx_bytes, n_tx_packets, n_tx_errs, n_tx_drop = v.pop(0)
# We want only positive values, if not, means that ther ewas a problem
# like a reboot for example, so counters are back to 0
d_rx_bytes = max(0, n_rx_bytes - p_rx_bytes) / diff / 1024
d_tx_bytes = max(0, n_tx_bytes - p_tx_bytes) / diff / 1024
d_rx_packets = max(0, n_rx_packets - p_rx_packets) / diff
d_tx_packets = max(0, n_tx_packets - p_tx_packets) / diff
d_rx_errs = max(0, n_rx_errs - p_rx_errs) / diff
d_tx_errs = max(0, n_tx_errs - p_tx_errs) / diff
d_rx_multicast = max(0, n_rx_multicast - p_rx_multicast) / diff
d_rx_drop = max(0, n_rx_drop - p_rx_drop) / diff
d_tx_drop = max(0, n_tx_drop - p_tx_drop) / diff
# Ok Now it's what we did all of this : dump the io stats!
# PACKETS
perfdata.append('%s_%s=%dp/s' % (device, "rx_by_sec", d_rx_packets))
perfdata.append('%s_%s=%dp/s' % (device, "tx_by_sec", d_tx_packets))
# BYTES
perfdata.append('%s_%s=%dKB/s' % (device, "rwKB_by_sec", d_rx_bytes))
perfdata.append('%s_%s=%dKB/s' % (device, "txKB_by_sec", d_tx_bytes))
# Multicast
perfdata.append('%s_%s=%dp/s' % (device, "rx_multicast_by_sec", d_rx_multicast))
# Errs
perfdata.append('%s_%s=%dp/s' % (device, "rxErrs_by_sec", d_rx_errs))
perfdata.append('%s_%s=%dp/s' % (device, "txErrs_by_sec", d_tx_errs))
# Drop
perfdata.append('%s_%s=%dp/s' % (device, "rxDrops_by_sec", d_rx_drop))
perfdata.append('%s_%s=%dp/s' % (device, "txDrops_by_sec", d_tx_drop))
print "OK | %s" % (' '.join(perfdata))
sys.exit(0)