memcached监控的python脚本

wendu

　　memcached 监控脚本，用于记录memcached的状态和负载情况。
　　输出至文件monitor_memcache_127.0.0.1_2014_9_19.log 中。包含时间、状态、采样区间平均每秒变化量（每秒的get 、set、bytes_read、bytes_written、内存变化)。
　　2014-09-19 00:08:10 1411056490 2325831 583884 365383267 1295656708 169255212 1 23 10 6402 14636 -183
　　2014-09-19 00:08:15 1411056495 2325948 583937 365415278 1295729889 169254299 1 26 8 6092 17059 -156
　　根据需要可以修改 regex1，记录其它的状态的变化量。

import telnetlib
import time
import re,os
import sys
Host = sys.argv[1]
Port = 11211
command ='stats'+ '\n'
delay_sec = 5
tn = telnetlib.Telnet(Host,Port)
tn.read_very_eager()
tn.write('stats' + '\n')  
tn.read_until('END')
print command
cur_time = time.localtime()
log_file_name = "monitor_memcache"+ "_" + Host + "_" +  str(cur_time[0]) + "_" + \
str(cur_time[1]) + "_" + \
str(cur_time[2]) +".log"
log_file = open(log_file_name, "w")
regex1='STAT time (\d+).*STAT cmd_get (\d+).*STAT cmd_set (\d+).*STAT bytes_read (\d+).*STAT bytes_written (\d+).*STAT bytes (\d+)'
pat = re.compile(regex1, re.DOTALL)
lv = []
while (1) :
tn.write(command)
ret = tn.read_until('END')
cur_time = time.localtime()
m = pat.search(ret)
v = m.groups()
if len(lv) > 0:
vi = [int(x) for x in v]
d = [x-y for x,y in zip(vi,lv)]
d_ps = [x/d[0] for x in d]
s = lv + d_ps
li = time.strftime('%Y-%m-%d %H:%M:%S',cur_time)+' '+ str(' '.join(list(map(str,s))))
log_file.write(li+'\n')
log_file.flush()
lv = list(map(int,v))
time.sleep(delay_sec)
log_file.close()
tn.close()