/usr/share/check_mk/checks/mem is in check-mk-server 1.1.12-1ubuntu1.
This file is owned by root:root, with mode 0o755.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 | #!/usr/bin/python
# -*- encoding: utf-8; py-indent-offset: 4 -*-
# +------------------------------------------------------------------+
# | ____ _ _ __ __ _ __ |
# | / ___| |__ ___ ___| | __ | \/ | |/ / |
# | | | | '_ \ / _ \/ __| |/ / | |\/| | ' / |
# | | |___| | | | __/ (__| < | | | | . \ |
# | \____|_| |_|\___|\___|_|\_\___|_| |_|_|\_\ |
# | |
# | Copyright Mathias Kettner 2010 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.
# +----------------------------------------------------------------------+
# | _ |
# | _ __ ___ ___ _ __ ___ _ _ ___ ___ __| | |
# | | '_ ` _ \ / _ \ '_ ` _ \ | | | / __|/ _ \/ _` | |
# | | | | | | | __/ | | | | || |_| \__ \ __/ (_| | |
# | |_| |_| |_|\___|_| |_| |_(_)__,_|___/\___|\__,_| |
# | |
# +----------------------------------------------------------------------+
# | Memory check that takes into account the swap space. This check is |
# | used for unixoide operating systems. |
# +----------------------------------------------------------------------+
memused_default_levels = (150.0, 200.0)
mem_extended_perfdata = False
def parse_proc_meminfo(info):
return dict([ (i[0][:-1], int(i[1])) for i in info ])
def inventory_mem_used(info):
meminfo = parse_proc_meminfo(info)
if "MemTotal" in meminfo and \
"PageTotal" not in meminfo: # This case is handled by mem.win
return [(None, "memused_default_levels")]
def check_mem_used(item, params, info):
try:
meminfo = parse_proc_meminfo(info)
swapused = meminfo['SwapTotal'] - meminfo['SwapFree']
memused = meminfo['MemTotal'] - meminfo['MemFree']
# Buffers and Cached are optional (not supported on Windows yet)
caches = meminfo.get('Buffers', 0) + meminfo.get('Cached', 0)
except:
return (3, "UNKNOWN - invalid output from plugin")
# Add extended memory performance data, if this is
# enabled and the agent provides that information.
extended_perf = []
extrainfo = ""
if mem_extended_perfdata:
mapped = meminfo.get('Mapped')
if mapped:
mapped_mb = int(mapped) / 1024
committed_as = meminfo.get('Committed_AS')
if committed_as:
committed_as_mb = int(committed_as) / 1024
else:
committed_as = 0
extended_perf = [
('mapped', str(mapped_mb) + 'MB', '', '', 0, ''),
('committed_as', str(committed_as_mb) + 'MB', '', '', 0, ''),
]
extrainfo = ", %.1f GB mapped, %.1f GB committed" % \
(mapped_mb / 1024.0, committed_as_mb / 1024.0)
totalused_kb = (swapused + memused - caches)
totalused_mb = totalused_kb / 1024
totalmem_kb = meminfo['MemTotal']
totalmem_mb = totalmem_kb / 1024
totalused_perc = 100 * (float(totalused_kb) / float(totalmem_kb))
totalvirt_mb = (meminfo['SwapTotal'] + meminfo['MemTotal']) / 1024
warn, crit = params
perfdata = [
('ramused', str( (memused - caches) / 1024) + 'MB', '', '', 0, totalmem_mb),
('swapused', str(swapused / 1024) + 'MB', '', '', 0, meminfo['SwapTotal']/1024) ]
# levels may be given either in int -> MB or in float -> percentages
infotext = ("%.2f GB used (%.2f GB RAM + %.2f GB SWAP, this is %.1f%% of %.2f GB RAM)" % \
(totalused_mb / 1024.0, (memused-caches) / 1024.0 / 1024, swapused / 1024.0 / 1024,
totalused_perc, totalmem_mb / 1024.0)) \
+ extrainfo
if type(warn) == float:
perfdata.append(('memused', str(totalused_mb)+'MB', int(warn/100.0 * totalmem_mb),
int(crit/100.0 * totalmem_mb), 0, totalvirt_mb))
perfdata += extended_perf
if totalused_perc >= crit:
return (2, 'CRIT - %s, critical at %.1f%%' % (infotext, crit), perfdata)
elif totalused_perc >= warn:
return (1, 'WARN - %s, warning at %.1f%%' % (infotext, warn), perfdata)
else:
return (0, 'OK - %s' % infotext, perfdata)
else:
perfdata.append(('memused', str(totalused_mb)+'MB', warn, crit, 0, totalvirt_mb))
perfdata += extended_perf
if totalused_mb >= crit:
return (2, 'CRIT - %s, critical at %.2f GB' % (infotext, crit / 1024.0), perfdata)
elif totalused_mb >= warn:
return (1, 'WARN - %s, warning at %.2f GB' % (infotext, warn / 1024.0), perfdata)
else:
return (0, 'OK - %s' % infotext, perfdata)
check_info['mem.used'] = (check_mem_used, "Memory used", 1, inventory_mem_used)
check_config_variables.append("mem_extended_perfdata")
# +----------------------------------------------------------------------+
# | _ |
# | _ __ ___ ___ _ __ ___ __ _(_)_ __ |
# | | '_ ` _ \ / _ \ '_ ` _ \\ \ /\ / / | '_ \ |
# | | | | | | | __/ | | | | |\ V V /| | | | | |
# | |_| |_| |_|\___|_| |_| |_(_)_/\_/ |_|_| |_| |
# | |
# +----------------------------------------------------------------------+
# | Windows now has a dedicated memory check that reflect the special |
# | nature of the page file. |
# +----------------------------------------------------------------------+
# Special memory and page file check for Windows
check_default_levels['mem.win'] = "memory_win_default_levels"
factory_settings["memory_win_default_levels"] = {
"memory" : ( "80.0", "90.0" ),
"pagefile" : ( "50.0", "70.0" ),
}
def inventory_mem_win(info):
meminfo = parse_proc_meminfo(info)
if "PageTotal" in meminfo:
return [(None, {})]
def check_mem_windows(item, params, info):
meminfo = parse_proc_meminfo(info)
perfdata = []
infotxts = []
MB = 1024.0 * 1024
worststate = 0
for title, what, paramname in [
( "Memory", "Mem", "memory" ),
( "Page file", "Page", "pagefile" )]:
total_kb = meminfo[what + "Total"]
free_kb = meminfo[what + "Free"]
used_kb = total_kb - free_kb
used_mb = used_kb / 1024.0
free_mb = free_kb / 1024.0
perc = 100.0 * used_kb / total_kb
# Now check the levels
warn, crit = params[paramname]
if (type(crit) == int and free_mb <= crit) or \
(type(crit) == float and perc >= crit):
worststate = 2
state_code = '(!!)'
elif (type(warn) == int and free_mb <= warn) or \
(type(warn) == float and perc >= warn):
worststate = max(worststate, 1)
state_code = '(!)'
else:
state_code = ""
# Convert levels to absolute values (for perfdata)
if type(warn) == float:
warn = total_kb * warn / 100 / 1024
if type(crit) == float:
crit = total_kb * crit / 100 / 1024
infotxts.append("%s usage: %.1f%% (%.1f/%.1f GB)%s" %
(title, perc, used_kb / MB, total_kb / MB, state_code))
perfdata.append((paramname, used_kb / 1024.0, warn, crit, 0, total_kb / 1024.0))
return (worststate, "%s - %s" %
(nagios_state_names[worststate], ", ".join(infotxts)), perfdata)
check_info['mem.win'] = (check_mem_windows, "Memory and pagefile", 1, inventory_mem_win)
# +----------------------------------------------------------------------+
# | _ _ |
# | _ __ ___ ___ _ __ ___ __ ___ __ ___ __ _| | | ___ ___ |
# | | '_ ` _ \ / _ \ '_ ` _ \\ \ / / '_ ` _ \ / _` | | |/ _ \ / __| |
# | | | | | | | __/ | | | | |\ V /| | | | | | (_| | | | (_) | (__ |
# | |_| |_| |_|\___|_| |_| |_(_)_/ |_| |_| |_|\__,_|_|_|\___/ \___| |
# | |
# +----------------------------------------------------------------------+
# | This very specific check checks the usage and fragmentation of the |
# | address space 'vmalloc' that can be problematic on 32-Bit systems. |
# +----------------------------------------------------------------------+
# warn, crit, warn_chunk, crit_chunk. Integers are in MB, floats are in percent
mem_vmalloc_default_levels = ( 80.0, 90.0, 32, 64 )
def inventory_mem_vmalloc(info):
meminfo = parse_proc_meminfo(info)
if "VmallocTotal" in meminfo:
# Do not checks this on 64 Bit systems. They have almost
# infinitive vmalloc
vmalloc = meminfo["VmallocTotal"] / 1024.4
if vmalloc < 4096:
return [ (None, "mem_vmalloc_default_levels") ]
return []
def check_mem_vmalloc(item, params, info):
meminfo = parse_proc_meminfo(info)
total_mb = meminfo["VmallocTotal"] / 1024.0
used_mb = meminfo["VmallocUsed"] / 1024.0
free_mb = total_mb - used_mb
chunk_mb = meminfo["VmallocChunk"] / 1024.0
warn, crit, warn_chunk, crit_chunk = params
state = 0
infotxts = []
perfdata = []
for var, w, c, v, neg, what in [
( "used", warn, crit, used_mb, False, "used" ),
( "chunk", warn_chunk, crit_chunk, chunk_mb, True, "largest chunk" )]:
# convert levels from percentage to MB values
if type(w) == float:
w_mb = total_mb * w / 100
else:
w_mb = float(w)
if type(c) == float:
c_mb = total_mb * c / 100
else:
c_mb = float(c)
infotxt = "%s %.1f MB" % (what, v)
if (v >= c_mb) != neg:
s = 2
infotxt += " (critical at %.1f MB!!)" % c_mb
elif (v >= w_mb) != neg:
s = 1
infotxt += " (warning at %.1f MB!)" % w_mb
else:
s = 0
state = max(state, s)
infotxts.append(infotxt)
perfdata.append( (var, v, w_mb, c_mb, 0, total_mb) )
return (state, nagios_state_names[state] + (" - total %.1f MB, " % total_mb) + ", ".join(infotxts), perfdata)
check_info["mem.vmalloc"] = (check_mem_vmalloc, "Vmalloc address space", 1, inventory_mem_vmalloc)
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