#!/usr/bin/python
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# MySQL主从集中监控脚本
# 请在MySQL上执行如下语句，将跑脚本的机器授权一个db_monitor账号。
# grant SHOW VIEW,REPLICATION CLIENT,SHOW DATABASES,PROCESS on *.* to db_monitor@'192.168.1.10';
import MySQLdb
import os
import datetime
# 发送一个字符串告警，公司特有告警系统，可以改成其他监控方式，比如短信或邮件
def report_alarm(attr, err_msg):
os.system('/usr/local/agenttools/agent/agentRepStr %s "%s" >/dev/null' % (attr, err_msg))
# 上报一个数值型告警，也是特有告警系统
def send_repnum(attr, num):
os.system('/usr/local/agenttools/agent/agentRepNum %s "%s" >/dev/null' % (attr ,num) )
def monitor(db_host):
try:
cxn=MySQLdb.connect(db_host, 'db_monitor', '', db='mysql')
except MySQLdb.Error, e:
try:
sqlError = "Error %d:%s" % (e.args[0], e.args[1])
except IndexError:
sqlError = "MySQL Error:%s" % str(e)
report_alarm(36320, sqlError)
#get mysql version
cur=cxn.cursor()
cur.execute('select version()')
for item in cur.fetchall():
if '5.0.' in item[0]:
mysql_version = 'low'
else:
mysql_version = 'high'
#show slave status
cur=cxn.cursor()
cur.execute('show slave status')
for item in cur.fetchall():
replicate_error = item[19]
if mysql_version == 'low':
seconds_behind_master = item[-1]
else:
seconds_behind_master = item[32]
#show processlist
cur=cxn.cursor()
cur.execute('show processlist')
connect_num = len(cur.fetchall())
meta_lock_num = cur.fetchall().count("meta lock")
cxn.close()
return replicate_error,seconds_behind_master,connect_num,meta_lock_num
print datetime.datetime.now()
for host in open('%s/hosts.list'% os.path.dirname(os.path.realpath(__file__))):
host = host.strip('\n')
replicate_error = ''
seconds_behind_master = 0
connect_num = 0
meta_lock_num = 0
replicate_error,seconds_behind_master,connect_num,meta_lock_num = monitor(host)
try:
Seconds_behind_master = int(seconds_behind_master)
except:
Seconds_behind_master = seconds_behind_master
print '==============================='
print 'Infomation of %s' % host
print "The Num of metalock : %s" % meta_lock_num
print "The Num of connection : %s" % connect_num
# 上报当前连接数
send = send_repnum(36713, connect_num)
# 上报字典锁数量
send = send_repnum(36715, meta_lock_num)
if len(replicate_error) > 0:
print replicate_error
# 如果主从同步出现问题，就发送告警
report_alarm(36320, '%s: Replicate error' % host)
elif Seconds_behind_master > 600:
print "Seconds behid master: %s" % Seconds_behind_master
# 如果主从延迟超过600s，就发送告警
report_alarm(36320, '%s: Seconds behind master ge 600' % host)
#else:
# print host + " is OK!"
print '==============================='
