nagios插件-查看redis的内存使用率
nagios插件-查看redis的内存使用率使用python写的一个nagios插件，主要实现的功能就是查看redis的内存使用率，写这个插件起初是因为公司服务器的redis一个端口的内存使用完了，导致公司网站访问出现异常，所以写了这个插件來检测redis的内存使用率。
使用方法见脚本：check_redis_mem
[*]#!/usr/bin/env python
[*]#encoding=utf8
[*]
[*]#需要给python安装redis插件，安装方法：#easy_install redis
[*]import redis
[*]import sys
[*]import getopt
[*]
[*]def usage():
[*] print """
[*]Usage:
[*]
[*]check_redis_mem [-h|--help][-H|--hostname][-P|--port][-w|--warning][-c|--critical]
[*]
[*]Options:
[*] --help|-h)
[*] print check_redis_mem help.
[*] --host|-H)
[*] Sets connect host.
[*] --port|-P)
[*] Sets connect port.
[*] --warning|-w)
[*] Sets a warning level for redis mem userd. Default is: on
[*] --critical|-c)
[*] Sets a critical level for redis mem userd. Default is: on
[*]Example:
[*] ./check_redis_mem -H 127.0.0.1 -P 6379 -w 80 -c 90 or ./check_redis_mem -H 127.0.0.1 -P 6379
[*] This should output: mem is ok and used 10.50%"""
[*] sys.exit(3)
[*]
[*]try:
[*] options,args = getopt.getopt(sys.argv,"hH:P:w:c:",["help","host=","port=","warning=","critical="])
[*]except getopt.GetoptError as e:
[*] usage()
[*]
[*]warning = 75
[*]critical = 85
[*]host = ''
[*]port = 0
[*]
[*]for name,value in options:
[*] if name in ("-h","--help"):
[*] usage()
[*] if name in ("-H","--host"):
[*] host = value
[*] if name in ("-P","--port"):
[*] port = int(value)
[*] if name in ("-w","--warning"):
[*] warning = value
[*] if name in ("-c","--critical"):
[*] critical = value
[*]
[*]if host == '' or port == 0:
[*] usage()
[*]
[*]try:
[*] r = redis.Redis(host=host,port=port)
[*] if r.ping() == True:
[*] maxmem = r.config_get(pattern='maxmemory').get('maxmemory')
[*] usedmem = r.info().get('used_memory')
[*] temp=float(usedmem) / float(maxmem)
[*] tmp = temp*100
[*]
[*] if tmp >= warning and tmp < critical:
[*] print "mem is used %.2f%%" % (tmp)
[*] sys.exit(1)
[*] elif tmp >= critical:
[*] print "mem is used %.2f%%" % (tmp)
[*] sys.exit(2)
[*] else:
[*] print "It's ok and mem is used %.2f%%" % (tmp)
[*] sys.exit(0)
[*] else:
[*] print "can't connect."
[*] sys.exit(2)
[*]except Exception as e:
[*] print e.message
[*] usage()
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