Python实现Linux监控的方法

#!/usr/bin/env Python
from __future__ import print_function
from collections import OrderedDict
import pprint
def CPUinfo():
''' Return the information in /proc/CPUinfo
as a dictionary in the following format:
CPU_info['proc0']={...}
CPU_info['proc1']={...}
'''
CPUinfo=OrderedDict()
procinfo=OrderedDict()
nprocs = 0
with open('/proc/CPUinfo') as f:
for line in f:
if not line.strip():
# end of one processor
CPUinfo['proc%s' % nprocs] = procinfo
nprocs=nprocs+1
# Reset
procinfo=OrderedDict()
else:
if len(line.split(':')) == 2:
procinfo[line.split(':')[0].strip()] = line.split(':')[1].strip()
else:
procinfo[line.split(':')[0].strip()] = ''
return CPUinfo
if __name__=='__main__':
CPUinfo = CPUinfo()
for processor in CPUinfo.keys():
print(CPUinfo[processor]['model name'])

#!/usr/bin/env Python  
import os 
def load_stat(): 
loadavg = {} 
f = open("/proc/loadavg") 
con = f.read().split() 
f.close() 
loadavg['lavg_1']=con[0] 
loadavg['lavg_5']=con[1] 
loadavg['lavg_15']=con[2] 
loadavg['nr']=con[3] 
loadavg['last_pid']=con[4] 
return loadavg 
print "loadavg",load_stat()['lavg_15']

!/usr/bin/env Python
from __future__ import print_function
from collections import OrderedDict
def meminfo():
''' Return the information in /proc/meminfo
as a dictionary '''
meminfo=OrderedDict()
with open('/proc/meminfo') as f:
for line in f:
meminfo[line.split(':')[0]] = line.split(':')[1].strip()
return meminfo
if __name__=='__main__':
#print(meminfo())
meminfo = meminfo()
print('Total memory: {0}'.format(meminfo['MemTotal']))
print('Free memory: {0}'.format(meminfo['MemFree']))

#!/usr/bin/env Python
  import time
  import sys
  if len(sys.argv) > 1:
    INTERFACE = sys.argv[1]
  else:
    INTERFACE = 'eth0'
  STATS = []
  print 'Interface:',INTERFACE
  def rx():
    ifstat = open('/proc/net/dev').readlines()
    for interface in ifstat:
      if INTERFACE in interface:
        stat = float(interface.split()[1])
        STATS[0:] = [stat]
  def tx():
    ifstat = open('/proc/net/dev').readlines()
    for interface in ifstat:
      if INTERFACE in interface:
        stat = float(interface.split()[9])
        STATS[1:] = [stat]
  print  'In     Out'
  rx()
  tx()
  while  True:
    time.sleep(1)
    rxstat_o = list(STATS)
    rx()
    tx()
    RX = float(STATS[0])
    RX_O = rxstat_o[0]
    TX = float(STATS[1])
    TX_O = rxstat_o[1]
    RX_RATE = round((RX - RX_O)/1024/1024,3)
    TX_RATE = round((TX - TX_O)/1024/1024,3)
    print RX_RATE ,'MB   ',TX_RATE ,'MB'

#!/usr/bin/env Python 
import os, sys, time 
while True: 
time.sleep(4) 
try: 
ret = os.popen('ps -C apache -o pid,cmd').readlines() 
if len(ret) < 2: 
print "apache 进程异常退出， 4 秒后重新启动" 
time.sleep(3) 
os.system("service apache2 restart") 
except: 
print "Error", sys.exc_info()[1]