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unix.py
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unix.py
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"""
Unix system checks.
"""
# stdlib
import operator
import platform
import re
import socket
import string
import subprocess as sp
import sys
import time
# project
from checks import Check, UnknownValue
from checks.system import Platform
from util import get_hostname
# locale-resilient float converter
to_float = lambda s: float(s.replace(",", "."))
class Disk(Check):
""" Collects metrics about the machine's disks. """
def check(self, agentConfig):
"""Get disk space/inode stats"""
# First get the configuration.
use_mount = agentConfig.get("use_mount", False)
blacklist_re = agentConfig.get('device_blacklist_re', None)
platform_name = sys.platform
try:
dfk_out = _get_subprocess_output(['df', '-k'])
disks = self.parse_df_output(
dfk_out,
platform_name,
use_mount=use_mount,
blacklist_re=blacklist_re
)
# Collect inode metrics.
dfi_out = _get_subprocess_output(['df', '-i'])
inodes = self.parse_df_output(
dfi_out,
platform_name,
inodes=True,
use_mount=use_mount,
blacklist_re=blacklist_re
)
return (disks, inodes)
except Exception:
self.logger.exception('Error collecting disk stats')
return False
def parse_df_output(self, df_output, platform_name, inodes=False, use_mount=False, blacklist_re=None):
"""
Parse the output of the df command. If use_volume is true the volume
is used to anchor the metric, otherwise false the mount
point is used. Returns a tuple of (disk, inode).
"""
usage_data = []
# Transform the raw output into tuples of the df data.
devices = self._transform_df_output(df_output, blacklist_re)
# If we want to use the mount point, replace the volume name on each
# line.
for parts in devices:
try:
if use_mount:
parts[0] = parts[-1]
if inodes:
if Platform.is_darwin(platform_name):
# Filesystem 512-blocks Used Available Capacity iused ifree %iused Mounted
# Inodes are in position 5, 6 and we need to compute the total
# Total
parts[1] = int(parts[5]) + int(parts[6]) # Total
parts[2] = int(parts[5]) # Used
parts[3] = int(parts[6]) # Available
elif Platform.is_freebsd(platform_name):
# Filesystem 1K-blocks Used Avail Capacity iused ifree %iused Mounted
# Inodes are in position 5, 6 and we need to compute the total
parts[1] = int(parts[5]) + int(parts[6]) # Total
parts[2] = int(parts[5]) # Used
parts[3] = int(parts[6]) # Available
else:
parts[1] = int(parts[1]) # Total
parts[2] = int(parts[2]) # Used
parts[3] = int(parts[3]) # Available
else:
parts[1] = int(parts[1]) # Total
parts[2] = int(parts[2]) # Used
parts[3] = int(parts[3]) # Available
except IndexError:
self.logger.exception("Cannot parse %s" % (parts,))
usage_data.append(parts)
return usage_data
@staticmethod
def _is_number(a_string):
try:
float(a_string)
except ValueError:
return False
return True
def _is_real_device(self, device):
"""
Return true if we should track the given device name and false otherwise.
"""
# First, skip empty lines.
if not device or len(device) <= 1:
return False
# Filter out fake devices.
device_name = device[0]
if device_name == 'none':
return False
# Now filter our fake hosts like 'map -hosts'. For example:
# Filesystem 1024-blocks Used Available Capacity Mounted on
# /dev/disk0s2 244277768 88767396 155254372 37% /
# map -hosts 0 0 0 100% /net
blocks = device[1]
if not self._is_number(blocks):
return False
return True
def _flatten_devices(self, devices):
# Some volumes are stored on their own line. Rejoin them here.
previous = None
for parts in devices:
if len(parts) == 1:
previous = parts[0]
elif previous and self._is_number(parts[0]):
# collate with previous line
parts.insert(0, previous)
previous = None
else:
previous = None
return devices
def _transform_df_output(self, df_output, blacklist_re):
"""
Given raw output for the df command, transform it into a normalized
list devices. A 'device' is a list with fields corresponding to the
output of df output on each platform.
"""
all_devices = [l.strip().split() for l in df_output.split("\n")]
# Skip the header row and empty lines.
raw_devices = [l for l in all_devices[1:] if l]
# Flatten the disks that appear in the mulitple lines.
flattened_devices = self._flatten_devices(raw_devices)
# Filter fake disks.
def keep_device(device):
if not self._is_real_device(device):
return False
if blacklist_re and blacklist_re.match(device[0]):
return False
return True
devices = filter(keep_device, flattened_devices)
return devices
class IO(Check):
def __init__(self, logger):
Check.__init__(self, logger)
self.header_re = re.compile(r'([%\\/\-_a-zA-Z0-9]+)[\s+]?')
self.item_re = re.compile(r'^([a-zA-Z0-9\/]+)')
self.value_re = re.compile(r'\d+\.\d+')
def _parse_linux2(self, output):
recentStats = output.split('Device:')[2].split('\n')
header = recentStats[0]
headerNames = re.findall(self.header_re, header)
device = None
ioStats = {}
for statsIndex in range(1, len(recentStats)):
row = recentStats[statsIndex]
if not row:
# Ignore blank lines.
continue
deviceMatch = self.item_re.match(row)
if deviceMatch is not None:
# Sometimes device names span two lines.
device = deviceMatch.groups()[0]
else:
continue
values = re.findall(self.value_re, row)
if not values:
# Sometimes values are on the next line so we encounter
# instances of [].
continue
ioStats[device] = {}
for headerIndex in range(len(headerNames)):
headerName = headerNames[headerIndex]
ioStats[device][headerName] = values[headerIndex]
return ioStats
def _parse_darwin(self, output):
lines = [l.split() for l in output.split("\n") if len(l) > 0]
disks = lines[0]
lastline = lines[-1]
io = {}
for idx, disk in enumerate(disks):
kb_t, tps, mb_s = map(float, lastline[(3 * idx):(3 * idx) + 3]) # 3 cols at a time
io[disk] = {
'system.io.bytes_per_s': mb_s * 10**6,
}
return io
def xlate(self, metric_name, os_name):
"""Standardize on linux metric names"""
if os_name == "sunos":
names = {
"wait": "await",
"svc_t": "svctm",
"%b": "%util",
"kr/s": "rkB/s",
"kw/s": "wkB/s",
"actv": "avgqu-sz",
}
elif os_name == "freebsd":
names = {
"svc_t": "await",
"%b": "%util",
"kr/s": "rkB/s",
"kw/s": "wkB/s",
"wait": "avgqu-sz",
}
# translate if possible
return names.get(metric_name, metric_name)
def check(self, agentConfig):
"""Capture io stats.
@rtype dict
@return {"device": {"metric": value, "metric": value}, ...}
"""
io = {}
try:
if sys.platform == 'linux2':
stdout = sp.Popen(['iostat', '-d', '1', '2', '-x', '-k'],
stdout=sp.PIPE,
close_fds=True).communicate()[0]
# Linux 2.6.32-343-ec2 (ip-10-35-95-10) 12/11/2012 _x86_64_ (2 CPU)
#
# Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util
# sda1 0.00 17.61 0.26 32.63 4.23 201.04 12.48 0.16 4.81 0.53 1.73
# sdb 0.00 2.68 0.19 3.84 5.79 26.07 15.82 0.02 4.93 0.22 0.09
# sdg 0.00 0.13 2.29 3.84 100.53 30.61 42.78 0.05 8.41 0.88 0.54
# sdf 0.00 0.13 2.30 3.84 100.54 30.61 42.78 0.06 9.12 0.90 0.55
# md0 0.00 0.00 0.05 3.37 1.41 30.01 18.35 0.00 0.00 0.00 0.00
#
# Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util
# sda1 0.00 0.00 0.00 10.89 0.00 43.56 8.00 0.03 2.73 2.73 2.97
# sdb 0.00 0.00 0.00 2.97 0.00 11.88 8.00 0.00 0.00 0.00 0.00
# sdg 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
# sdf 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
# md0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
io.update(self._parse_linux2(stdout))
elif sys.platform == "sunos5":
iostat = sp.Popen(["iostat", "-x", "-d", "1", "2"],
stdout=sp.PIPE,
close_fds=True).communicate()[0]
# extended device statistics <-- since boot
# device r/s w/s kr/s kw/s wait actv svc_t %w %b
# ramdisk1 0.0 0.0 0.1 0.1 0.0 0.0 0.0 0 0
# sd0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
# sd1 79.9 149.9 1237.6 6737.9 0.0 0.5 2.3 0 11
# extended device statistics <-- past second
# device r/s w/s kr/s kw/s wait actv svc_t %w %b
# ramdisk1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
# sd0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
# sd1 0.0 139.0 0.0 1850.6 0.0 0.0 0.1 0 1
# discard the first half of the display (stats since boot)
lines = [l for l in iostat.split("\n") if len(l) > 0]
lines = lines[len(lines)/2:]
assert "extended device statistics" in lines[0]
headers = lines[1].split()
assert "device" in headers
for l in lines[2:]:
cols = l.split()
# cols[0] is the device
# cols[1:] are the values
io[cols[0]] = {}
for i in range(1, len(cols)):
io[cols[0]][self.xlate(headers[i], "sunos")] = cols[i]
elif sys.platform.startswith("freebsd"):
iostat = sp.Popen(["iostat", "-x", "-d", "1", "2"],
stdout=sp.PIPE,
close_fds=True).communicate()[0]
# Be careful!
# It looks like SunOS, but some columms (wait, svc_t) have different meaning
# extended device statistics
# device r/s w/s kr/s kw/s wait svc_t %b
# ad0 3.1 1.3 49.9 18.8 0 0.7 0
# extended device statistics
# device r/s w/s kr/s kw/s wait svc_t %b
# ad0 0.0 2.0 0.0 31.8 0 0.2 0
# discard the first half of the display (stats since boot)
lines = [l for l in iostat.split("\n") if len(l) > 0]
lines = lines[len(lines)/2:]
assert "extended device statistics" in lines[0]
headers = lines[1].split()
assert "device" in headers
for l in lines[2:]:
cols = l.split()
# cols[0] is the device
# cols[1:] are the values
io[cols[0]] = {}
for i in range(1, len(cols)):
io[cols[0]][self.xlate(headers[i], "freebsd")] = cols[i]
elif sys.platform == 'darwin':
iostat = sp.Popen(['iostat', '-d', '-c', '2', '-w', '1'],
stdout=sp.PIPE,
close_fds=True).communicate()[0]
# disk0 disk1 <-- number of disks
# KB/t tps MB/s KB/t tps MB/s
# 21.11 23 0.47 20.01 0 0.00
# 6.67 3 0.02 0.00 0 0.00 <-- line of interest
io = self._parse_darwin(iostat)
else:
return False
# If we filter devices, do it know.
device_blacklist_re = agentConfig.get('device_blacklist_re', None)
if device_blacklist_re:
filtered_io = {}
for device, stats in io.iteritems():
if not device_blacklist_re.match(device):
filtered_io[device] = stats
else:
filtered_io = io
return filtered_io
except Exception:
self.logger.exception("Cannot extract IO statistics")
return False
class Load(Check):
def __init__(self, logger):
Check.__init__(self, logger)
def check(self, agentConfig):
if sys.platform == 'linux2':
try:
loadAvrgProc = open('/proc/loadavg', 'r')
uptime = loadAvrgProc.readlines()
loadAvrgProc.close()
except Exception:
self.logger.exception('Cannot extract load')
return False
uptime = uptime[0] # readlines() provides a list but we want a string
elif sys.platform in ('darwin', 'sunos5') or sys.platform.startswith("freebsd"):
# Get output from uptime
try:
uptime = sp.Popen(['uptime'],
stdout=sp.PIPE,
close_fds=True).communicate()[0]
except Exception:
self.logger.exception('Cannot extract load')
return False
# Split out the 3 load average values
load = [res.replace(',', '.') for res in re.findall(r'([0-9]+[\.,]\d+)', uptime)]
# Normalize load by number of cores
try:
cores = int(agentConfig.get('system_stats').get('cpuCores'))
assert cores >= 1, "Cannot determine number of cores"
# Compute a normalized load, named .load.norm to make it easy to find next to .load
return {'system.load.1': float(load[0]),
'system.load.5': float(load[1]),
'system.load.15': float(load[2]),
'system.load.norm.1': float(load[0])/cores,
'system.load.norm.5': float(load[1])/cores,
'system.load.norm.15': float(load[2])/cores,
}
except Exception:
# No normalized load available
return {'system.load.1': float(load[0]),
'system.load.5': float(load[1]),
'system.load.15': float(load[2])}
class Memory(Check):
def __init__(self, logger):
Check.__init__(self, logger)
macV = None
if sys.platform == 'darwin':
macV = platform.mac_ver()
macV_minor_version = int(re.match(r'10\.(\d+)\.?.*', macV[0]).group(1))
# Output from top is slightly modified on OS X 10.6 (case #28239) and greater
if macV and (macV_minor_version >= 6):
self.topIndex = 6
else:
self.topIndex = 5
self.pagesize = 0
if sys.platform == 'sunos5':
try:
pgsz = sp.Popen(['pagesize'],
stdout=sp.PIPE,
close_fds=True).communicate()[0]
self.pagesize = int(pgsz.strip())
except Exception:
# No page size available
pass
def check(self, agentConfig):
if sys.platform == 'linux2':
try:
meminfoProc = open('/proc/meminfo', 'r')
lines = meminfoProc.readlines()
meminfoProc.close()
except Exception:
self.logger.exception('Cannot get memory metrics from /proc/meminfo')
return False
# $ cat /proc/meminfo
# MemTotal: 7995360 kB
# MemFree: 1045120 kB
# Buffers: 226284 kB
# Cached: 775516 kB
# SwapCached: 248868 kB
# Active: 1004816 kB
# Inactive: 1011948 kB
# Active(anon): 455152 kB
# Inactive(anon): 584664 kB
# Active(file): 549664 kB
# Inactive(file): 427284 kB
# Unevictable: 4392476 kB
# Mlocked: 4392476 kB
# SwapTotal: 11120632 kB
# SwapFree: 10555044 kB
# Dirty: 2948 kB
# Writeback: 0 kB
# AnonPages: 5203560 kB
# Mapped: 50520 kB
# Shmem: 10108 kB
# Slab: 161300 kB
# SReclaimable: 136108 kB
# SUnreclaim: 25192 kB
# KernelStack: 3160 kB
# PageTables: 26776 kB
# NFS_Unstable: 0 kB
# Bounce: 0 kB
# WritebackTmp: 0 kB
# CommitLimit: 15118312 kB
# Committed_AS: 6703508 kB
# VmallocTotal: 34359738367 kB
# VmallocUsed: 400668 kB
# VmallocChunk: 34359329524 kB
# HardwareCorrupted: 0 kB
# HugePages_Total: 0
# HugePages_Free: 0
# HugePages_Rsvd: 0
# HugePages_Surp: 0
# Hugepagesize: 2048 kB
# DirectMap4k: 10112 kB
# DirectMap2M: 8243200 kB
regexp = re.compile(r'^(\w+):\s+([0-9]+)') # We run this several times so one-time compile now
meminfo = {}
for line in lines:
try:
match = re.search(regexp, line)
if match is not None:
meminfo[match.group(1)] = match.group(2)
except Exception:
self.logger.exception("Cannot parse /proc/meminfo")
memData = {}
# Physical memory
# FIXME units are in MB, we should use bytes instead
try:
memData['physTotal'] = int(meminfo.get('MemTotal', 0)) / 1024
memData['physFree'] = int(meminfo.get('MemFree', 0)) / 1024
memData['physBuffers'] = int(meminfo.get('Buffers', 0)) / 1024
memData['physCached'] = int(meminfo.get('Cached', 0)) / 1024
memData['physShared'] = int(meminfo.get('Shmem', 0)) / 1024
memData['physUsed'] = memData['physTotal'] - memData['physFree']
# Usable is relative since cached and buffers are actually used to speed things up.
memData['physUsable'] = memData['physFree'] + memData['physBuffers'] + memData['physCached']
if memData['physTotal'] > 0:
memData['physPctUsable'] = float(memData['physUsable']) / float(memData['physTotal'])
except Exception:
self.logger.exception('Cannot compute stats from /proc/meminfo')
# Swap
# FIXME units are in MB, we should use bytes instead
try:
memData['swapTotal'] = int(meminfo.get('SwapTotal', 0)) / 1024
memData['swapFree'] = int(meminfo.get('SwapFree', 0)) / 1024
memData['swapUsed'] = memData['swapTotal'] - memData['swapFree']
if memData['swapTotal'] > 0:
memData['swapPctFree'] = float(memData['swapFree']) / float(memData['swapTotal'])
except Exception:
self.logger.exception('Cannot compute swap stats')
return memData
elif sys.platform == 'darwin':
macV = platform.mac_ver()
macV_minor_version = int(re.match(r'10\.(\d+)\.?.*', macV[0]).group(1))
try:
top = sp.Popen(['top', '-l 1'], stdout=sp.PIPE, close_fds=True).communicate()[0]
sysctl = sp.Popen(['sysctl', 'vm.swapusage'], stdout=sp.PIPE, close_fds=True).communicate()[0]
except StandardError:
self.logger.exception('getMemoryUsage')
return False
# Deal with top
lines = top.split('\n')
physParts = re.findall(r'([0-9]\d+)', lines[self.topIndex])
# Deal with sysctl
swapParts = re.findall(r'([0-9]+\.\d+)', sysctl)
# Mavericks changes the layout of physical memory format in `top`
physUsedPartIndex = 3
physFreePartIndex = 4
if macV and (macV_minor_version >= 9):
physUsedPartIndex = 0
physFreePartIndex = 2
return {'physUsed' : physParts[physUsedPartIndex], 'physFree' : physParts[physFreePartIndex], 'swapUsed' : swapParts[1], 'swapFree' : swapParts[2]}
elif sys.platform.startswith("freebsd"):
try:
sysctl = sp.Popen(['sysctl', 'vm.stats.vm'], stdout=sp.PIPE, close_fds=True).communicate()[0]
except Exception:
self.logger.exception('getMemoryUsage')
return False
lines = sysctl.split('\n')
# ...
# vm.stats.vm.v_page_size: 4096
# vm.stats.vm.v_page_count: 759884
# vm.stats.vm.v_wire_count: 122726
# vm.stats.vm.v_active_count: 109350
# vm.stats.vm.v_cache_count: 17437
# vm.stats.vm.v_inactive_count: 479673
# vm.stats.vm.v_free_count: 30542
# ...
# We run this several times so one-time compile now
regexp = re.compile(r'^vm\.stats\.vm\.(\w+):\s+([0-9]+)')
meminfo = {}
for line in lines:
try:
match = re.search(regexp, line)
if match is not None:
meminfo[match.group(1)] = match.group(2)
except Exception:
self.logger.exception("Cannot parse sysctl vm.stats.vm output")
memData = {}
# Physical memory
try:
pageSize = int(meminfo.get('v_page_size'))
memData['physTotal'] = (int(meminfo.get('v_page_count', 0))
* pageSize) / 1048576
memData['physFree'] = (int(meminfo.get('v_free_count', 0))
* pageSize) / 1048576
memData['physCached'] = (int(meminfo.get('v_cache_count', 0))
* pageSize) / 1048576
memData['physUsed'] = ((int(meminfo.get('v_active_count'), 0) +
int(meminfo.get('v_wire_count', 0)))
* pageSize) / 1048576
memData['physUsable'] = ((int(meminfo.get('v_free_count'), 0) +
int(meminfo.get('v_cache_count', 0)) +
int(meminfo.get('v_inactive_count', 0))) *
pageSize) / 1048576
if memData['physTotal'] > 0:
memData['physPctUsable'] = float(memData['physUsable']) / float(memData['physTotal'])
except Exception:
self.logger.exception('Cannot compute stats from /proc/meminfo')
# Swap
try:
sysctl = sp.Popen(['swapinfo', '-m'], stdout=sp.PIPE, close_fds=True).communicate()[0]
except Exception:
self.logger.exception('getMemoryUsage')
return False
lines = sysctl.split('\n')
# ...
# Device 1M-blocks Used Avail Capacity
# /dev/ad0s1b 570 0 570 0%
# ...
assert "Device" in lines[0]
try:
memData['swapTotal'] = 0
memData['swapFree'] = 0
memData['swapUsed'] = 0
for line in lines[1:-1]:
line = line.split()
memData['swapTotal'] += int(line[1])
memData['swapFree'] += int(line[3])
memData['swapUsed'] += int(line[2])
except Exception:
self.logger.exception('Cannot compute stats from swapinfo')
return memData;
elif sys.platform == 'sunos5':
try:
memData = {}
kmem = sp.Popen(["kstat", "-c", "zone_memory_cap", "-p"],
stdout=sp.PIPE,
close_fds=True).communicate()[0]
# memory_cap:360:53aa9b7e-48ba-4152-a52b-a6368c:anon_alloc_fail 0
# memory_cap:360:53aa9b7e-48ba-4152-a52b-a6368c:anonpgin 0
# memory_cap:360:53aa9b7e-48ba-4152-a52b-a6368c:class zone_memory_cap
# memory_cap:360:53aa9b7e-48ba-4152-a52b-a6368c:crtime 16359935.0680834
# memory_cap:360:53aa9b7e-48ba-4152-a52b-a6368c:execpgin 185
# memory_cap:360:53aa9b7e-48ba-4152-a52b-a6368c:fspgin 2556
# memory_cap:360:53aa9b7e-48ba-4152-a52b-a6368c:n_pf_throttle 0
# memory_cap:360:53aa9b7e-48ba-4152-a52b-a6368c:n_pf_throttle_usec 0
# memory_cap:360:53aa9b7e-48ba-4152-a52b-a6368c:nover 0
# memory_cap:360:53aa9b7e-48ba-4152-a52b-a6368c:pagedout 0
# memory_cap:360:53aa9b7e-48ba-4152-a52b-a6368c:pgpgin 2741
# memory_cap:360:53aa9b7e-48ba-4152-a52b-a6368c:physcap 536870912 <--
# memory_cap:360:53aa9b7e-48ba-4152-a52b-a6368c:rss 115544064 <--
# memory_cap:360:53aa9b7e-48ba-4152-a52b-a6368c:snaptime 16787393.9439095
# memory_cap:360:53aa9b7e-48ba-4152-a52b-a6368c:swap 91828224 <--
# memory_cap:360:53aa9b7e-48ba-4152-a52b-a6368c:swapcap 1073741824 <--
# memory_cap:360:53aa9b7e-48ba-4152-a52b-a6368c:zonename 53aa9b7e-48ba-4152-a52b-a6368c3d9e7c
# turn memory_cap:360:zone_name:key value
# into { "key": value, ...}
kv = [l.strip().split() for l in kmem.split("\n") if len(l) > 0]
entries = dict([(k.split(":")[-1], v) for (k, v) in kv])
# extract rss, physcap, swap, swapcap, turn into MB
convert = lambda v: int(long(v))/2**20
memData["physTotal"] = convert(entries["physcap"])
memData["physUsed"] = convert(entries["rss"])
memData["physFree"] = memData["physTotal"] - memData["physUsed"]
memData["swapTotal"] = convert(entries["swapcap"])
memData["swapUsed"] = convert(entries["swap"])
memData["swapFree"] = memData["swapTotal"] - memData["swapUsed"]
if memData['swapTotal'] > 0:
memData['swapPctFree'] = float(memData['swapFree']) / float(memData['swapTotal'])
return memData
except Exception:
self.logger.exception("Cannot compute mem stats from kstat -c zone_memory_cap")
return False
else:
return False
class Processes(Check):
def __init__(self, logger):
Check.__init__(self, logger)
def check(self, agentConfig):
# Get output from ps
try:
ps = sp.Popen(['ps', 'auxww'], stdout=sp.PIPE, close_fds=True).communicate()[0]
except StandardError:
self.logger.exception('getProcesses')
return False
# Split out each process
processLines = ps.split('\n')
del processLines[0] # Removes the headers
processLines.pop() # Removes a trailing empty line
processes = []
for line in processLines:
line = line.split(None, 10)
processes.append(map(lambda s: s.strip(), line))
return { 'processes': processes,
'apiKey': agentConfig['api_key'],
'host': get_hostname(agentConfig) }
class Cpu(Check):
def __init__(self, logger):
Check.__init__(self, logger)
def check(self, agentConfig):
"""Return an aggregate of CPU stats across all CPUs
When figures are not available, False is sent back.
"""
def format_results(us, sy, wa, idle, st):
return { 'cpuUser': us, 'cpuSystem': sy, 'cpuWait': wa, 'cpuIdle': idle, 'cpuStolen': st }
def get_value(legend, data, name):
"Using the legend and a metric name, get the value or None from the data line"
if name in legend:
return to_float(data[legend.index(name)])
else:
# FIXME return a float or False, would trigger type error if not python
self.logger.debug("Cannot extract cpu value %s from %s (%s)" % (name, data, legend))
return 0.0
if sys.platform == 'linux2':
mpstat = sp.Popen(['mpstat', '1', '3'], stdout=sp.PIPE, close_fds=True).communicate()[0]
# topdog@ip:~$ mpstat 1 3
# Linux 2.6.32-341-ec2 (ip) 01/19/2012 _x86_64_ (2 CPU)
#
# 04:22:41 PM CPU %usr %nice %sys %iowait %irq %soft %steal %guest %idle
# 04:22:42 PM all 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
# 04:22:43 PM all 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
# 04:22:44 PM all 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
# Average: all 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
#
# OR
#
# Thanks to Mart Visser to spotting this one.
# blah:/etc/dd-agent# mpstat
# Linux 2.6.26-2-xen-amd64 (atira) 02/17/2012 _x86_64_
#
# 05:27:03 PM CPU %user %nice %sys %iowait %irq %soft %steal %idle intr/s
# 05:27:03 PM all 3.59 0.00 0.68 0.69 0.00 0.00 0.01 95.03 43.65
#
lines = mpstat.split("\n")
legend = [l for l in lines if "%usr" in l or "%user" in l]
avg = [l for l in lines if "Average" in l]
if len(legend) == 1 and len(avg) == 1:
headers = [h for h in legend[0].split() if h not in ("AM", "PM")]
data = avg[0].split()
# Userland
# Debian lenny says %user so we look for both
# One of them will be 0
cpu_usr = get_value(headers, data, "%usr")
cpu_usr2 = get_value(headers, data, "%user")
cpu_nice = get_value(headers, data, "%nice")
# I/O
cpu_wait = get_value(headers, data, "%iowait")
# Idling
cpu_idle = get_value(headers, data, "%idle")
# Kernel + Interrupts, soft and hard
cpu_sys = get_value(headers, data, "%sys")
cpu_hirq = get_value(headers, data, "%irq")
cpu_sirq = get_value(headers, data, "%soft")
# VM-related
cpu_st = get_value(headers, data, "%steal")
cpu_guest = get_value(headers, data, "%guest")
# (cpu_user & cpu_usr) == 0
return format_results(cpu_usr + cpu_usr2 + cpu_nice,
cpu_sys + cpu_hirq + cpu_sirq,
cpu_wait, cpu_idle,
cpu_st)
else:
return False
elif sys.platform == 'darwin':
# generate 3 seconds of data
# [' disk0 disk1 cpu load average', ' KB/t tps MB/s KB/t tps MB/s us sy id 1m 5m 15m', ' 21.23 13 0.27 17.85 7 0.13 14 7 79 1.04 1.27 1.31', ' 4.00 3 0.01 5.00 8 0.04 12 10 78 1.04 1.27 1.31', '']
iostats = sp.Popen(['iostat', '-C', '-w', '3', '-c', '2'], stdout=sp.PIPE, close_fds=True).communicate()[0]
lines = [l for l in iostats.split("\n") if len(l) > 0]
legend = [l for l in lines if "us" in l]
if len(legend) == 1:
headers = legend[0].split()
data = lines[-1].split()
cpu_user = get_value(headers, data, "us")
cpu_sys = get_value(headers, data, "sy")
cpu_wait = 0
cpu_idle = get_value(headers, data, "id")
cpu_st = 0
return format_results(cpu_user, cpu_sys, cpu_wait, cpu_idle, cpu_st)
else:
self.logger.warn("Expected to get at least 4 lines of data from iostat instead of just " + str(iostats[:max(80, len(iostats))]))
return False
elif sys.platform.startswith("freebsd"):
# generate 3 seconds of data
# tty ada0 cd0 pass0 cpu
# tin tout KB/t tps MB/s KB/t tps MB/s KB/t tps MB/s us ni sy in id
# 0 69 26.71 0 0.01 0.00 0 0.00 0.00 0 0.00 2 0 0 1 97
# 0 78 0.00 0 0.00 0.00 0 0.00 0.00 0 0.00 0 0 0 0 100
iostats = sp.Popen(['iostat', '-w', '3', '-c', '2'], stdout=sp.PIPE, close_fds=True).communicate()[0]
lines = [l for l in iostats.split("\n") if len(l) > 0]
legend = [l for l in lines if "us" in l]
if len(legend) == 1:
headers = legend[0].split()
data = lines[-1].split()
cpu_user = get_value(headers, data, "us")
cpu_nice = get_value(headers, data, "ni")
cpu_sys = get_value(headers, data, "sy")
cpu_intr = get_value(headers, data, "in")
cpu_wait = 0
cpu_idle = get_value(headers, data, "id")
cpu_stol = 0
return format_results(cpu_user + cpu_nice, cpu_sys + cpu_intr, cpu_wait, cpu_idle, cpu_stol);
else:
self.logger.warn("Expected to get at least 4 lines of data from iostat instead of just " + str(iostats[:max(80, len(iostats))]))
return False
elif sys.platform == 'sunos5':
# mpstat -aq 1 2
# SET minf mjf xcal intr ithr csw icsw migr smtx srw syscl usr sys wt idl sze
# 0 5239 0 12857 22969 5523 14628 73 546 4055 1 146856 5 6 0 89 24 <-- since boot
# 1 ...
# SET minf mjf xcal intr ithr csw icsw migr smtx srw syscl usr sys wt idl sze
# 0 20374 0 45634 57792 5786 26767 80 876 20036 2 724475 13 13 0 75 24 <-- past 1s
# 1 ...
# http://docs.oracle.com/cd/E23824_01/html/821-1462/mpstat-1m.html
#
# Will aggregate over all processor sets
try:
mpstat = sp.Popen(['mpstat', '-aq', '1', '2'], stdout=sp.PIPE, close_fds=True).communicate()[0]
lines = [l for l in mpstat.split("\n") if len(l) > 0]
# discard the first len(lines)/2 lines
lines = lines[len(lines)/2:]
legend = [l for l in lines if "SET" in l]
assert len(legend) == 1
if len(legend) == 1:
headers = legend[0].split()
# collect stats for each processor set
# and aggregate them based on the relative set size
d_lines = [l for l in lines if "SET" not in l]
user = [get_value(headers, l.split(), "usr") for l in d_lines]
kern = [get_value(headers, l.split(), "sys") for l in d_lines]
wait = [get_value(headers, l.split(), "wt") for l in d_lines]
idle = [get_value(headers, l.split(), "idl") for l in d_lines]
size = [get_value(headers, l.split(), "sze") for l in d_lines]
count = sum(size)
rel_size = [s/count for s in size]
dot = lambda v1, v2: reduce(operator.add, map(operator.mul, v1, v2))
return format_results(dot(user, rel_size),
dot(kern, rel_size),
dot(wait, rel_size),
dot(idle, rel_size),
0.0)
except Exception:
self.logger.exception("Cannot compute CPU stats")
return False
else:
self.logger.warn("CPUStats: unsupported platform")
return False
def _get_subprocess_output(command):
"""
Run the given subprocess command and return it's output. Raise an Exception
if an error occurs.
"""
proc = sp.Popen(command, stdout=sp.PIPE, close_fds=True)
return proc.stdout.read()
if __name__ == '__main__':
# 1s loop with results
import logging
import time
import pprint
import re
logging.basicConfig(level=logging.DEBUG, format='%(asctime)-15s %(message)s')
log = logging.getLogger()
cpu = Cpu(log)
disk = Disk(log)
io = IO(log)
load = Load(log)
mem = Memory(log)
proc = Processes(log)
config = {"api_key": "666", "device_blacklist_re":re.compile('.*disk0.*')}
while True:
print("=" * 10)
print("--- IO ---")
print(io.check(config))
print("--- Disk ---")
print(disk.check(config))
print("--- CPU ---")
print(cpu.check(config))
print("--- Load ---")
print(load.check(config))
print("--- Memory ---")
print(mem.check(config))
print("\n\n\n")
#print("--- Processes ---")
#print(proc.check(config))
time.sleep(1)