zabbix自定义监控进程，日志，mysql主从

环境说明:

zabbix: 192.168.44.128 服务端（已经装好zabbix_agentd和zabbix_server，且为MySQL主）

node2: 192.168.44.129 客户端 （已经装好zabbix_agentd，已经安装好apache服务，且为MySQL从，数据库没有密码）

监视客户端的apache进程

[root@zabbix ~]# systemctl stop firewalld
[root@zabbix ~]# setenfoce 0
[root@node2 ~]# systemctl stop firewalld
[root@node2 ~]# setenforce 0
[root@node2 ~]# mkdir /scripts
[root@node2 ~]# cd /scripts/
//以查看进程方式过滤apache进程，输出1表示进程有问题，0表示没问题
[root@node2 scripts]# vim check_process.sh
#!/bin/bash

count=$(ps -ef | grep -Ev "grep|$0" | grep -c "$1")
if [ $count -eq 0 ];then
        echo "1"
else    
        echo "0"
fi
[root@node2 scripts]# chmod +x check_process.sh
//源码安装执行此脚本要加绝对路径
[root@node2 scripts]# ./check_process.sh /usr/local/apache/bin/httpd
[root@node2 scripts]# vim /usr/local/etc/zabbix_agentd.conf
//在文件最后面加入两行代码
UnsafeUserParameters=1
UserParameter=check_apache,/scripts/check_process.sh /usr/local/apache/bin/httpd

[root@node2 scripts]# pkill zabbix
[root@node2 scripts]# zabbix_agentd

//在服务端上查看能否取到刚才配置脚本的值
[root@zabbix ~]# zabbix_get -s 192.168.44.129 -k check_apache

//手动触发报警
[root@node2 scripts]# apachectl stop

监控客户端的apache的日志文件

[root@node2 scripts]# yum -y install python36
//log.py作用：检查日志文件中是否有指定的关键字
第一个参数为日志文件名（必须有，相对路径、绝对路径均可）
第二个参数为seek position文件的路径（可选项，若不设置则默认为/tmp/logseek文件。相对路径、绝对路径均可）
第三个参数为搜索关键字，默认为 Error
[root@node2 scripts]# vim log.py
#!/usr/bin/env python3
import sys
import re

def prePos(seekfile):
    global curpos
    try:
        cf = open(seekfile)
    except IOError:
        curpos = 0
        return curpos
    except FileNotFoundError:
        curpos = 0
        return curpos
    else:
        try:
            curpos = int(cf.readline().strip())
        except ValueError:
            curpos = 0
            cf.close()
            return curpos
        cf.close()
    return curpos

def lastPos(filename):
    with open(filename) as lfile:
        if lfile.readline():
            lfile.seek(0,2)
        else:
            return 0
        lastPos = lfile.tell()
    return lastPos

def getSeekFile():
    try:
        seekfile = sys.argv[2]
    except IndexError:
        seekfile = '/tmp/logseek'
    return seekfile

def getKey():
    try:
        tagKey = str(sys.argv[3])
    except IndexError:
        tagKey = 'Error'
    return tagKey

def getResult(filename,seekfile,tagkey):
    destPos = prePos(seekfile)
    curPos = lastPos(filename)

    if curPos < destPos:
        curpos = 0

    try:
        f = open(filename)
    except IOError:
        print('Could not open file: %s' % filename)
    except FileNotFoundError:
        print('Could not open file: %s' % filename)
    else:
        f.seek(destPos)

        while curPos != 0 and f.tell() < curPos:
            rresult = f.readline().strip()
            global result
            if re.search(tagkey, rresult):
                result = 1
                break
            else:
                result = 0

        with open(seekfile,'w') as sf:
            sf.write(str(curPos))
    finally:
        f.close()
    return result

if __name__ == "__main__":
    result = 0
    curpos = 0
    tagkey = getKey()
    seekfile = getSeekFile()
    result = getResult(sys.argv[1],seekfile,tagkey)
    print(result)
    
[root@node2 scripts]# chmod +x log.py
[root@node2 scripts]# touch /usr/local/apache/logs/error.log
[root@node2 scripts]# vim /usr/local/etc/zabbix_agentd.conf
UserParameter=check_logs[*],/scripts/log.py $1 $2 $3
[root@node2 scripts]# pkill zabbix
[root@node2 scripts]# zabbix_agentd

//在服务端上查看能否取到刚才配置py脚本的值
[root@zabbix ~]# zabbix_get -s 192.168.44.129 -k check_logs["/usr/local/apache/logs/error.log","/tmp/seek","Error"]


//手动触发报警
[root@node2 scripts]# echo 'Error' >> /usr/local/apache/logs/error.log

监控客户端的mysql主从状态

//输出1表示主从有问题，0表示没问题()
[root@node2 scripts]# vim check_mysql_repl.sh
#!/bin/bash

count=$(mysql -uroot -e 'show slave status\G'|grep ' Running:'|awk '{print $2}'|grep -c 'Yes')
if [ $count -ne 2 ];then
        echo '1'
else
        echo '0'
fi
[root@node2 scripts]# chmod +x check_mysql_repl.sh
[root@node2 scripts]# vim /usr/local/etc/zabbix_agentd.conf
//在文件最后面加入下面这行代码
UserParameter=check_mysql_repl,/scripts/check_mysql_repl.sh

[root@node2 scripts]# pkill zabbix
[root@node2 scripts]# zabbix_agentd

//在服务端上查看能否取到刚才配置脚本的值
[root@zabbix ~]# zabbix_get -s 192.168.44.129 -k check_mysql_repl

监控客户端的mysql主从延迟

[root@node2 ~]# vim /scripts/check_mysql_delay.sh 
#!/bin/bash

mysql -uroot -e 'show slave status \G'|grep 'Seconds_Behind_Master:'|awk '{print $2}'

[root@slave ~]# chmod +x /scripts/check_mysql_delay.sh 

//测试脚本
[root@slave ~]# /scripts/check_mysql_delay.sh
0

[root@slave ~]# vim /usr/local/etc/zabbix_agentd.conf
//在文件最下方加入这行内容
UserParameter=check_mysql_delay,/scripts/check_mysql_delay.sh

[root@slave ~]# pkill zabbix
[root@slave ~]# zabbix_agentd 

//使用服务端测试是否能获取刚才配置脚本的值
[root@zabbix ~]# zabbix_get -s 192.168.44.129 -k check_mysql_delay
0