#!/bin/env python
#-*- coding:utf-8 -*-

import json
import time
import socket
import os
import re
import sys
import commands
import urllib2, base64

class RedisStats:
    redis_cli = ‘/data/redis/bin/redis-cli‘
    stat_regex = re.compile(ur‘(\w+):([0-9]+\.?[0-9]*)\r‘)

    def __init__(self,port=‘6379‘,passwd=None,host=‘127.0.0.1‘,status=‘info‘):
        self.cmd = ‘%s -h %s -p %s %s‘ % (self.redis_cli, host, port,status)

    def stats(self):
        info = commands.getoutput(self.cmd)
        return dict(self.stat_regex.findall(info))

def main():
    timestamp = int(time.time())
    step = 60
    
    p = []
    
    monit_keys = [
        (‘connected_clients‘,‘GAUGE‘), 
        (‘blocked_clients‘,‘GAUGE‘), 
        (‘used_memory‘,‘GAUGE‘),
        (‘used_memory_rss‘,‘GAUGE‘),
        (‘mem_fragmentation_ratio‘,‘GAUGE‘),
        (‘total_commands_processed‘,‘COUNTER‘),
        (‘rejected_connections‘,‘COUNTER‘),
        (‘expired_keys‘,‘COUNTER‘),
        (‘evicted_keys‘,‘COUNTER‘),
        (‘keyspace_hits‘,‘COUNTER‘),
        (‘keyspace_misses‘,‘COUNTER‘),
        (‘keyspace_hit_ratio‘,‘GAUGE‘),
    ]
    
    insts_list = [ ‘/etc/redis/6379.conf‘ ]
  
    with open(‘./cfg.json‘) as f:
        data = f.read().replace(‘\n‘,‘‘)
        jsonhostname = json.loads(data)
        hostpoint = jsonhostname[‘hostname‘]

    for inst in insts_list:
        port = commands.getoutput("sed -n ‘s/^port *\([0-9]\{4,5\}\)/\\1/p‘ %s" % inst)
        metric = "redis"
        endpoint = ‘%s‘ %(hostpoint)
        tags = ‘port=%s‘ % port

        try:
            conn = RedisStats()
            stats = conn.stats()
        except Exception,e:
            continue

        for key,vtype in monit_keys:
            if key == ‘keyspace_hit_ratio‘:
                try:
                    value = float(stats[‘keyspace_hits‘])/(int(stats[‘keyspace_hits‘]) + int(stats[‘keyspace_misses‘]))
                except ZeroDivisionError:
                    value = 0
            elif key == ‘mem_fragmentation_ratio‘:
                value = float(stats[key])
            else:
                try:
                    value = int(stats[key])
                except:
                    continue
            
            i = {
                ‘Metric‘: ‘%s.%s‘ % (metric, key),
                ‘Endpoint‘: endpoint,
                ‘Timestamp‘: timestamp,
                ‘Step‘: step,
                ‘Value‘: value,
                ‘CounterType‘: vtype,
                ‘TAGS‘: tags
            }
            p.append(i)
        

    print json.dumps(p, sort_keys=True,indent=4)
    method = "POST"
    handler = urllib2.HTTPHandler()
    opener = urllib2.build_opener(handler)
    url = ‘http://127.0.0.1:1988/v1/push‘
    request = urllib2.Request(url, data=http://www.mamicode.com/json.dumps(p) )
    request.add_header("Content-Type",‘application/json‘)
    request.get_method = lambda: method
    try:
        connection = opener.open(request)
    except urllib2.HTTPError,e:
        connection = e

    # check. Substitute with appropriate HTTP code.
    if connection.code == 200:
        print connection.read()
    else:
        print ‘{"err":1,"msg":"%s"}‘ % connection
if __name__ == ‘__main__‘:
    proc = commands.getoutput(‘ ps -ef|grep %s|grep -v grep|wc -l ‘ % os.path.basename(sys.argv[0]))
    if int(proc) < 5:
        main()