linux中nagios pnp4nagios 图形监控 mysql

nagios图形界面还是比较麻烦的，下面以mysql为例来说一下。监控mysql的插件比较多，在这里了解方法，而不是死搬硬套。

一，安装pnp4nagios

[root@localhost objects]# yum install pnp4nagios rrdtool 
如果找不到包换epel源，博客里面有搜一下。关于nagios的安装，请参考：nagios 安装配置 详解

二，配置nagios

1，修改nagios.cfg
 
[root@localhost objects]# vim /etc/nagios/nagios.cfg    //修改以下内容 
process_performance_data=1                             //由0改为1 
host_perfdata_command=process-host-perfdata            //前面的注释拿掉 
service_perfdata_command=process-service-perfdata      //注释拿掉 
enable_environment_macros=1                            //如果有注释拿掉 

2，修改commands.cfg

注释掉原有对process-host-perfdata和process-service-perfdata，重新定义
[root@localhost objects]# vim /etc/nagios/objects/commands.cfg 
 
define command { 
       command_name    process-service-perfdata 
       command_line    /usr/bin/perl /usr/libexec/pnp4nagios/process_perfdata.pl 
} 
 
define command { 
       command_name    process-host-perfdata 
       command_line    /usr/bin/perl /usr/libexec/pnp4nagios/process_perfdata.pl -d HOSTPERFDATA 
} 

4、修改配置文件templates.cfg

添加以下内容
 
[root@localhost objects]# vim /etc/nagios/objects/templates.cfg  
 
define host { 
        name       hosts-pnp 
        register   0 
        action_url /pnp4nagios/index.php/graph?host=$HOSTNAME$&srv=_HOST_ 
        process_perf_data               1 
} 
define service { 
        name       srv-pnp 
        register   0 
        action_url /pnp4nagios/index.php/graph?host=$HOSTNAME$&srv=$SERVICEDESC$ 
        process_perf_data               1 
} 

5，修改服务器配置文件localhost.cfg
 
[root@localhost objects]# vim /etc/nagios/objects/localhost.cfg 
 
define host{ 
        use                     linux-server,hosts-pnp 
        host_name               localhost 
        alias                   localhost 
        address                 127.0.0.1 
        } 
 
define service{ 
        use                             local-service,srv-pnp 
        host_name                       localhost 
        service_description             PING 
        check_command                   check_ping!100.0,20%!500.0,60% 
        } 
上面只是例举了一个，你可以都加一下。

三，pnp4nagios配置

在网上好多关于pnp4nagios的文章，都是要把mv misccommands.cfg-sample misccommands.cfg 生成配置文件，我是yum安装的，安装目录下根本没有sample这样的东西
[root@localhost objects]# tree /etc/pnp4nagios/ 
/etc/pnp4nagios/ 
├── background.pdf 
├── check_commands 
│   ├── check_all_local_disks.cfg 
│   ├── check_nrpe.cfg 
│   └── check_nwstat.cfg 
├── config.php 
├── misccommands.cfg 
├── nagios.cfg 
├── npcd.cfg 
├── pages 
│   └── web_traffic.cfg 
├── pnp4nagios_release 
├── process_perfdata.cfg 
└── rra.cfg 
所在我根本没有配置任何东西。

四，重启nagios，启动npcd

[root@localhost pnp4nagios]# /etc/init.d/npcd start 
[root@localhost pnp4nagios]# /etc/init.d/nagios restart 

五，nginx配置

配置nginx的时候，配置挺头痛的，nagios的根目录是有php的，pnp4nagios是放在nagios的根目录下面，pnp4nagios也是php的，配置不好容易错乱的。
 
server 
{ 
    listen       80; 
    server_name  nagios.xxxx.com; 
    index  index.php; 
    root   /usr/share/nagios/html; 
 
    location ~ .*＼.(php|php5)?$ {        //nagios根目录的php 
        fastcgi_pass  127.0.0.1:9000; 
        fastcgi_index index.php; 
        include fastcgi.conf; 
    } 
 
    location ~ .*＼.(gif|jpg|jpeg|png|bmp|swf)$ {   //nagios的图片重写 
        rewrite ^/nagios/images/(.*) /images/$1 break; 
        rewrite ^/pnp4nagios/index.php/(.*) /pnp4nagios/$1 break; 
        expires     30d; 
    } 
 
    location ~ .*＼.(js|css)?$ {       //nagios的js,css重写 
        rewrite ^/nagios/stylesheets/(.*) /stylesheets/$1 break; 
        rewrite ^/nagios/js/(.*) /js/$1 break; 
        rewrite ^/pnp4nagios/index.php/(.*) /pnp4nagios/$1 break; 
        expires     1h; 
    } 
 
    location ~ .*＼.cgi$ {             //nagios的主程序是perl的，perl的cgi重写 
        root /usr/lib64/nagios/cgi-bin; 
        rewrite ^/nagios/cgi-bin/(.*)＼.cgi /$1.cgi break; 
        fastcgi_pass   127.0.0.1:9001; 
        fastcgi_index index.cgi; 
        include fastcgi.conf; 
    } 
    location ~ ^(/pnp4nagios.*＼.php)(.*)$ {       //pnp4nagios的php重写 
        rewrite ^/pnp4nagios/index.php/index.php/(.*)$ /pnp4nagios/index.php/$1; break; 
        fastcgi_pass   127.0.0.1:9000; 
        fastcgi_index index.php; 
        include fastcgi.conf; 
    } 
 
} 
在这里有一个问题就是http://nagios.xxxx.com/pnp4nagios/index.php/index.php/graph?host=localhost&srv=PING在这里有二个index.php，这个是php的程序加上去的，我并没有改。同一个页面有二种链接。
由nagios的监控页面，跳转到pnp4nagios监控页面的连接是
http://nagios.xxxx.com/pnp4nagios/index.php/graph?host=localhost&srv=PING
点php4nagios监控页面中的连接然后就会多加一个index.php，
http://nagios.xxxx.com/pnp4nagios/index.php/index.php/graph?host=localhost&srv=PING
这也是上面我为什么要加这一句rewrite ^/pnp4nagios/index.php/index.php/(.*)$ /pnp4nagios/index.php/$1; break;的原因

二，安装perl mysql扩展

# yum install perl-Class-DBI-mysql 

三，check_mysqld.php和check_mysqld.pl

1,下载

http://exchange.nagios.org/components/com_mtree/attachment.php?link_id=174&cf_id=30
http://exchange.nagios.org/components/com_mtree/attachment.php?link_id=174&cf_id=36
2,修改check_mysqld.php和check_mysqld.pl，本机是64位，根本没有/usr/lib/nagios，所以要把文件中的lib改成lib64

3,copy和修改文件权限

# cp check_mysqld.pl /usr/lib64/nagios/plugins 
 
# chmod 755 /usr/lib64/nagios/plugins/check_mysqld.pl 
# chgrp nagios /usr/lib64/nagios/plugins/check_mysqld.pl 
 
# cp check_mysqld.php /usr/share/nagios/html/pnp4nagios/templates.dist 

四，nagios配置

1,修改command.cfg

# vim /etc/nagios/objects/commands.cfg 
 
define command{ 
 command_name check_mysqld 
 command_line $USER1$/check_mysqld.pl -H $HOSTADDRESS$ -u nagios -p $USER7$ -a uptime,threads_connected,questions,slow_queries,open_tables -w ',,,,' -c ',,,,' -A $USER21$ 
} 

2,修改resource.cfg

# vim /etc/nagios/objects/resource.cfg  
 
$USER7$=nagios 
$USER21$='com_select,com_update,com_insert,com_insert_select,
com_commit,com_delete,com_rollback,aborted_clients,
aborted_connects,binlog_cache_disk_use,binlog_cache_use,
bytes_received,bytes_sent,connections,created_tmp_disk_tables,
created_tmp_files,created_tmp_tables,delayed_errors,
delayed_insert_threads,delayed_writes,handler_update,handler_write,
handler_delete,handler_read_first,handler_read_key,
handler_read_next,handler_read_prev,handler_read_rnd,
handler_read_rnd_next,key_blocks_not_flushed,
key_blocks_unused,key_blocks_used,key_read_requests,key_reads,
key_write_requests,key_writes,max_used_connections,
not_flushed_delayed_rows,open_files,open_streams,open_tables,
opened_tables,prepared_stmt_count,qcache_free_blocks,
qcache_free_memory,qcache_hits,qcache_inserts,
qcache_lowmem_prunes,qcache_not_cached,
qcache_queries_in_cache,qcache_total_blocks,questions,
select_full_join,select_rangle_check,slow_launch_threads,
slow_queries,table_locks_immediate,table_locks_waited,
threads_cached,threads_connected,threads_created,
threads_running' 

在这里要注意，$USER21$后面的内容要在一行。

3,修改localhost.cfg

# vim /etc/nagios/objects/localhost.cfg  
 
define service { 
 use local-service,srv-pnp //srv-pnp换成你自定义的 
 host_name localhost 
 service_description MYSQLD 
 check_command check_mysqld!localhost!nagios!nagios 
} 
4,pnp4nagios中增加check_mysqld.cfg
# vim /etc/pnp4nagios/check_commands/check_mysqld.cfg 
 
DATATYPE = COUNTER  

五，重启nagios

# /etc/init.d/npcd restart 
# /etc/init.d/nrpe restart 
# /etc/init.d/nagios restart 

六,查看结果