单个服务器上创建多实例,对其重要参数的监控是非常重要的,以下是监控服务器上多实例的负载情况:主要包含:redis实例的QPS、内存使用情况、客户端连接数,服务器的内存使用率、CPU使用率、CPU load值、网卡流量等,脚本把采集到的数据显示并且写入到数据库中,方便查看多个服务器的多实例情况以及数据的汇总等,写的优点仓促,有兴趣的同学可以整理一下脚本使其模块化、简洁化。脚本如下:

#!/usr/bin/env python
#-*-coding:UTF-8-*-
import os,threading,time,sys,sigar,MySQLdb
'''
安装python的sigar模块
apt-get install libtool automake gettext python-MySQLdb screen pkg-config git
git clone git://github.com/hyperic/sigar.git sigar.git
./autogen.sh
./configure
make
make install
cd bindings/python/
python setup.py install
'''
'''
建库sql
CREATE TABLE `redis_stats` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `host_name` varchar(50) NOT NULL,
  `qps` int(11) NOT NULL,
  `clients` int(11) NOT NULL,
  `redis_mem_used` varchar(50) NOT NULL,
  `sys_mem_used_pers` float NOT NULL,
  `cpu_used` float NOT NULL,
  `cpu_load` varchar(50) NOT NULL,
  `netband` varchar(255) NOT NULL,
  `uptime` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  KEY `host_name` (`host_name`),
  KEY `uptime` (`uptime`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
查询每个实例的最新记录
select host_name,qps,clients,redis_mem_used,concat(sys_mem_used_pers,'%') as sys_mem_used,concat(cpu_used,'%') as cpu_used,cpu_load,netband from DBA.redis_stats group by host_name desc order by qps desc;
'''
def log2db(check_log):
    log_host = '192.168.56.101'
    log_user = 'root'
    log_pass = '1q2w3e4r'
    try:
        conn = MySQLdb.connect(host = log_host,port = 3306,user = log_user,passwd = log_pass,charset='utf8',connect_timeout=20)
        cursor = conn.cursor()
        #cursor.execute(insert_sql)
        cursor.executemany("INSERT INTO redis.redis_stats (`host_name`,`qps`,`clients`,`redis_mem_used`,`sys_mem_used_pers`,`cpu_used`,`cpu_load`,`netband`) VALUES (%s,%s,%s,%s,%s,%s,%s,%s)",tuple(check_log))
        conn.commit()
        cursor.close()
        conn.close()
    except Exception,e:
        print e
def redis_info(host,port,res):
    var = []
    var.append(host)
    var.append(port)
    aaa = os.popen("redis-cli -h %s -p %s info|grep -v '#'|tr -s '\r\n'" % (host,port)).readlines()
    dirc = {}
    for i in aaa:
        if i != '\r\n':
            a = i.strip()
            aa = a.split(":")
            dirc[aa[0]]=aa[1]
    var.append(dirc["connected_clients"])
    var.append(dirc["instantaneous_ops_per_sec"])
    var.append(dirc["used_memory_human"])
    res.append(var)
def main():
    netband = {}
    stime = 5
    while True:
        try:
            sg = sigar.open()
            mem = sg.mem()#内存
            mem_percent = "%.2f" % mem.used_percent()
            cpu = sg.cpu()#CPU总的使用率
            cpu_idle = "%.2f" % ((1-float(cpu.idle())/cpu.total())*100)
            loadavg = sg.loadavg()#CPU load值
            cpu_loadavg = ','.join([str(i) for i in loadavg])
            #nets = [i for i in sg.net_interface_list() if 'dum' not in i and i != 'lo']#网卡流量统计
            nets = [i.strip() for i in os.popen("/bin/ip a|grep global|awk '{print $7}'").readlines() if i.strip() != '']
            if len(netband) != 0:
                for net in nets:
                    netband[net+'_Out'] = "%.2f" % (float((sg.net_interface_stat(net).tx_bytes()) - int(netband[net+'_Out']))/stime/1024/1024)
                    netband[net+'_In'] = "%.2f" % (float((sg.net_interface_stat(net).rx_bytes()) - int(netband[net+'_In']))/stime/1024/1024)
            else:
                for net in nets:
                    netband[net+'_Out'] = "%.2f" % (float(sg.net_interface_stat(net).tx_bytes())/stime/1024/1024)
                    netband[net+'_In'] = "%.2f" % (float(sg.net_interface_stat(net).rx_bytes())/stime/1024/1024)
            redis_list = ['192.168.56.101:6379','192.168.1.87:16379']
            text = "*"*20 + "  Redis Status  %s  " % time.strftime("%Y-%m-%d %H:%M:%S") + "*"*20
            print "\033[1;31;40m%s\033[0m" % text
            threads = []
            res = []
            for i in redis_list:
                aa = i.split(':')
                host = aa[0]
                port = aa[1]
                t = threading.Thread(target=redis_info,args=(host,port,res))
                threads.append(t)
            for i in range(len(threads)):
                threads[i].start()
            for i in range(len(threads)):
                threads[i].join()
            print "\033[1;35;40m%s\033[0m" % ("Redis_host:port".ljust(23)+"Redis:QPS".ljust(10)+"Redis:Clients".ljust(15)+"Redis:Mem_used".ljust(15)+"Mem_percent".ljust(12)+"Cpu_used".ljust(10)+"Cpu_loadavg".ljust(17))
            All_qps = 0
            All_clients = 0
            res.sort()
            check_log = []
            for i in res:
                log = [i[0]+':'+i[1],int(i[3]),int(i[2]),i[4],float(mem_percent),float(cpu_idle),cpu_loadavg,str(netband)]
                check_log.append(log)
                print (i[0]+':'+i[1]).ljust(23)+i[3].ljust(10)+i[2].ljust(15)+i[4].ljust(15)+mem_percent.ljust(12)+cpu_idle.ljust(10)+cpu_loadavg.ljust(17)+str(netband)
                All_qps = All_qps + int(i[3])
                All_clients = All_clients + int(i[2])
            log2db(check_log)
            print "\033[1;35;40m%s\033[0m" % ("Summary All host:".ljust(23)+str(All_qps).ljust(10)+str(All_clients).ljust(10))
            netband = {}
            for net in nets:
                netband[net+'_Out'] = sg.net_interface_stat(net).tx_bytes()
                netband[net+'_In'] = sg.net_interface_stat(net).rx_bytes()
            time.sleep(stime)
        except KeyboardInterrupt :
            sys.exit(0)
            print
            break
if __name__ == "__main__":
    main()

有图有真相:

wKiom1LXUSeTq5ufAAXw-D3QjCY771.jpg