/usr/share/check_mk/checks/diskstat.include is in check-mk-server 1.2.6p12-1.
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 2014 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[1], "diskstat_default_levels")
for line in info
if not ' ' in line[1] ]
if "lvm" in modes:
inventory += [ (line[1], "diskstat_default_levels")
for line in info
if line[1].startswith("LVM ") ]
if "vxvm" in modes:
inventory += [ (line[1], "diskstat_default_levels")
for line in info
if line[1].startswith("VxVM ") ]
return inventory
def check_diskstat_line(this_time, item, params, line, mode='sectors'):
average_range = params.get("average")
perfdata = []
infos = []
status = 0
node = line[0]
if node != None and node != "":
infos.append("Node %s" % node)
prediction_perf = []
for what, ctr in [ ("read", line[2]), ("write", line[3]) ]:
if node:
countername = "diskstat.%s.%s.%s" % (node, item, what)
else:
countername = "diskstat.%s.%s" % (item, what)
# unpack levels now, need also for perfdata
levels = params.get(what)
if type(levels) == tuple:
warn, crit = levels
else:
warn, crit = None, None
per_sec = get_rate(countername, this_time, int(ctr))
if mode == 'sectors':
# compute IO rate in bytes/sec
bytes_per_sec = per_sec * 512
elif mode == 'bytes':
bytes_per_sec = per_sec
infos.append("%s/sec %s" % (get_bytes_human_readable(bytes_per_sec), what))
perfdata.append( (what, bytes_per_sec, warn, crit) )
dsname = what
# compute average of the rate over ___ minutes
if average_range != None:
avg = get_average(countername + ".avg", this_time, bytes_per_sec, average_range)
dsname = what + ".avg"
perfdata.append( (dsname, avg) )
bytes_per_sec = avg
# check levels
state, text, extraperf = check_levels(bytes_per_sec, dsname, levels,
unit = "MB/s", scale = 1048576, statemarkers=True)
if text:
infos.append(text)
status = max(state, status)
prediction_perf += extraperf
# 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) >= 6 and line[4] >= 0 and line[5] > 0:
reads, writes = map(int, line[4:6])
ios = reads + writes
ios_per_sec = get_rate(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) >= 7 and line[6] >= 0:
timems = int(line[6])
timems_per_sec = get_rate(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) >= 9:
for what, ctr in [ ("read", line[7]), ("write", line[8]) ]:
countername = "diskstat.%s.ql.%s" % (item, what)
levels = params.get(what + "_ql")
if levels:
warn, crit = levels
else:
warn, crit = None, None
qlx = get_rate(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))
perfdata += prediction_perf
return (status, ", ".join(infos) , perfdata)
def check_diskstat_generic(item, params, this_time, info, mode='sectors'):
# legacy version if item is "read" or "write"
if item in [ 'read', 'write' ]:
return check_diskstat_old(item, params, this_time, info)
# Sum up either all physical disks (if item is "SUMMARY") or
# all entries matching the item in question. It is not a bug if
# a disk appears more than once. This can for example happen in
# Windows clusters - even if they are no Check_MK clusters.
summed_up = [0] * 13
matching = 0
for line in info:
if item == 'SUMMARY' and line[0] != None:
return 3, "summary mode not supported in a cluster"
elif item == 'SUMMARY' and ' ' in line[1]:
continue # skip non-physical disks
elif item == 'SUMMARY' or line[1] == item:
matching += 1
summed_up = map(lambda e: e[0] + int(e[1]), zip(summed_up, line[2:]))
if matching == 0:
return 3, "No matching disk found"
else:
return check_diskstat_line(this_time, item, params, [None, ''] + summed_up, mode)
# 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 = 2 # sectors read
elif item == 'write':
index = 3 # sectors written
else:
return (3, "invalid item %s" % (item,))
this_val = 0
for line in info:
if line[0] != None:
return 3, "read/write mode not supported in a cluster"
if ' ' not in line[1]:
this_val += int(line[index])
per_sec = get_rate("diskstat." + item, this_time, this_val)
mb_per_s = per_sec / 2048.0 # Diskstat output is in sectors a 512 Byte
kb_per_s = per_sec / 2.0
perfdata = [ (item, "%f" % kb_per_s ) ]
return (0, "%.1f MB/s" % mb_per_s, perfdata)
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