/usr/share/check_mk/checks/diskstat.include is in check-mk-server 1.2.2p3-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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# -*- encoding: utf-8; py-indent-offset: 4 -*-
# +------------------------------------------------------------------+
# | ____ _ _ __ __ _ __ |
# | / ___| |__ ___ ___| | __ | \/ | |/ / |
# | | | | '_ \ / _ \/ __| |/ / | |\/| | ' / |
# | | |___| | | | __/ (__| < | | | | . \ |
# | \____|_| |_|\___|\___|_|\_\___|_| |_|_|\_\ |
# | |
# | Copyright Mathias Kettner 2013 mk@mathias-kettner.de |
# +------------------------------------------------------------------+
#
# This file is part of Check_MK.
# The official homepage is at http://mathias-kettner.de/check_mk.
#
# check_mk 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 in version 2. check_mk is distributed
# in the hope that it will be useful, but WITHOUT ANY WARRANTY; with-
# out even the implied warranty of MERCHANTABILITY or FITNESS FOR A
# PARTICULAR PURPOSE. See the GNU General Public License for more de-
# ails. You should have received a copy of the GNU General Public
# License along with GNU Make; see the file COPYING. If not, write
# to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
# Boston, MA 02110-1301 USA.
diskstat_inventory_mode = "rule" # "summary", "single", "legacy"
diskstat_default_levels = {
# "read" : (10, 20), # MB/sec
# "write" : (20, 40), # MB/sec
# "average" : 15, # min
# "latency" : (10, 20), # ms
# "latency_perfdata" : True,
}
# Rule for controlling diskstat inventory more fine grained
diskstat_inventory = []
# Example
# diskstat_inventory = [
# ( [], [ 'linux' ], ALL_HOST ), --> No diskstat on this host
# ( [ 'summary', 'physical', 'lvm', 'vxvm' ], ALL_HOSTS ),
# ]
def inventory_diskstat_generic(info):
# Skip over on empty data
if not info:
return
# New style: use rule based configuration, defaulting to summary mode
if diskstat_inventory_mode == "rule":
hits = host_extra_conf(g_hostname, diskstat_inventory)
if len(hits) > 0:
modes = hits[0]
else:
modes = [ "summary" ]
elif diskstat_inventory_mode == "single":
modes = [ "physical" ]
elif diskstat_inventory_mode == "summary":
modes = [ "summary" ]
else:
modes = [ "legacy" ]
inventory = []
if "summary" in modes:
inventory.append( ( "SUMMARY", "diskstat_default_levels" ) )
if "legacy" in modes:
inventory += [ ( "read", None ), ( "write", None ) ]
if "physical" in modes:
inventory += [ (line[0], "diskstat_default_levels")
for line in info
if not ' ' in line[0] ]
if "lvm" in modes:
inventory += [ (line[0], "diskstat_default_levels")
for line in info
if line[0].startswith("LVM ") ]
if "vxvm" in modes:
inventory += [ (line[0], "diskstat_default_levels")
for line in info
if line[0].startswith("VxVM ") ]
return inventory
def check_diskstat_line(this_time, item, params, line):
average_range = params.get("average")
perfdata = []
infos = []
status = 0
for what, ctr in [ ("read", line[1]), ("write", line[2]) ]:
countername = "diskstat.%s.%s" % (item, what)
# unpack levels now, need also for perfdata
levels = params.get(what)
if levels:
warn, crit = levels
else:
warn, crit = None, None
# compute IO rate in bytes/sec
timedif, sectors_per_sec = get_counter(countername, this_time, int(ctr))
bytes_per_sec = sectors_per_sec * 512
infos.append("%s/sec %s" % (get_bytes_human_readable(bytes_per_sec), what))
perfdata.append( (what, bytes_per_sec, warn, crit) )
# compute average of the rate over ___ minutes
if average_range != None:
timedif, avg = get_average(countername + ".avg", this_time, bytes_per_sec, average_range)
perfdata.append( (what + ".avg", avg) )
bytes_per_sec = avg
# check levels
if levels != None:
mb_per_sec = bytes_per_sec / 1048576
if mb_per_sec >= crit:
status = 2
infos[-1] += "(!!)"
elif mb_per_sec >= warn:
status = max(status, 1)
infos[-1] += "(!)"
# Add performance data for averaged IO
if average_range != None:
perfdata = [ perfdata[0], perfdata[2], perfdata[1], perfdata[3] ]
# Process IOs when available
ios_per_sec = None
if len(line) >= 5 and line[3] >= 0 and line[4] > 0:
reads, writes = map(int, line[3:5])
ios = reads + writes
timedif, ios_per_sec = get_counter(countername + ".ios", this_time, ios)
infos.append("IOs: %.2f/sec" % ios_per_sec)
if params.get("latency_perfdata"):
perfdata.append(("ios", ios_per_sec))
# Do Latency computation if this information is available:
if len(line) >= 6 and line[5] >= 0:
timems = int(line[5])
timedif, timems_per_sec = get_counter(countername + ".time", this_time, timems)
if not ios_per_sec:
latency = 0.0
else:
latency = timems_per_sec / ios_per_sec
infos.append("Latency: %.2fms" % latency)
if "latency" in params:
warn, crit = params["latency"]
if latency >= crit:
status = 2
infos[-1] += "(!!)"
elif latency >= warn:
status = max(status, 1)
infos[-1] += "(!)"
else:
warn, crit = None, None
if params.get("latency_perfdata"):
perfdata.append(("latency", latency, warn, crit))
# Queue Lengths (currently only Windows). Windows uses counters here.
# I have not understood, why....
if len(line) >= 8:
for what, ctr in [ ("read", line[6]), ("write", line[7]) ]:
countername = "diskstat.%s.ql.%s" % (item, what)
levels = params.get(what + "_ql")
if levels:
warn, crit = levels
else:
warn, crit = None, None
timedif, qlx = get_counter(countername, this_time, int(ctr))
ql = qlx / 10000000.0
infos.append(what.title() + " Queue: %.2f" % ql)
# check levels
if levels != None:
if ql >= crit:
status = 2
infos[-1] += "(!!)"
elif ql >= warn:
status = max(status, 1)
infos[-1] += "(!)"
if params.get("ql_perfdata"):
perfdata.append((what + "_ql", ql))
return (status, nagios_state_names[status] + " - " + ", ".join(infos) , perfdata)
def check_diskstat_generic(item, params, this_time, info):
# legacy version if item is "read" or "write"
if item in [ 'read', 'write' ]:
return check_diskstat_old(item, params, this_time, info)
# summary mode
if item == 'SUMMARY': # summary mode (only summarize physical disks!)
summary_line = [0] * 13
for line in info:
devname = line[0]
if ' ' in devname:
continue
summary_line = map(lambda e: e[0] + int(e[1]), zip(summary_line, line[1:]))
return check_diskstat_line(this_time, "SUMMARY", params, [''] + summary_line)
# single mode
for line in info:
if line[0] == item:
return check_diskstat_line(this_time, item, params, line)
return (3, "UNKNOWN - device missing")
# This is the legacy version of diskstat as used in <= 1.1.10.
# We keep it here for a while in order to be compatible with
# old installations.
def check_diskstat_old(item, params, this_time, info):
# sum up over all devices
if item == 'read':
index = 1 # sectors read
elif item == 'write':
index = 2 # sectors written
else:
return (3, "UNKNOWN - invalid item %s" % (item,))
this_val = sum([int(x[index]) for x in info if ' ' not in x[0]])
timedif, per_sec = get_counter("diskstat." + item, this_time, this_val)
mb_per_s = per_sec / 2048.0 # Diskstat output is in sectors a 512 Byte
perfdata = [ (item, "%dc" % this_val ) ]
return (0, "OK - %.1fMB/s (in last %d secs)" % (mb_per_s, timedif), perfdata)
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