Nagios服务器架设之三

 

三、Nagios的运行和维护

1） 验证nagios主配置文件的语法正确性

[root@localhost etc]# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

Total Warnings: 0

Total Errors:   0

 

Things look okay - No serious problems were detected during the pre-flight check

2） 启动与停止nagios

[root@localhost etc]# service nagios start

Starting nagios:This account is currently not available.

 done.

[root@localhost etc]# service nagios status

nagios (pid 5106) is running...

[root@localhost etc]# service nagios stop

Stopping nagios: .done.

[root@localhost etc]# service nagios restart

Running configuration check...done.

Stopping nagios: No lock file found in /usr/local/nagios//var/nagios.lock

Starting nagios:This account is currently not available.

 done.

四、Nagios性能分析图表的实现

1)       安装PNP支持包rrdtool工具

首先安装支持包

yum install libxml2-devel libpng-devel pkg-config glib pixman pango pango-devel freetype freetype-devel fontconfig cairo cairo-devel libart_lgpl libart_lgpl-devel

[root@localhost aaa]# tar zxf rrdtool-1.4.5.tar.gz

[root@localhost aaa]# cd rrdtool-1.4.5

[root@localhost rrdtool-1.4.5]# ./configure --prefix=/usr/local/rrdtool ; make ; make install

2）安装PNP

[root@localhost rrdtool-1.4.5]# cd /aaa/

[root@localhost aaa]# tar zxf pnp-0.4.13.tar.gz

[root@localhost aaa]# cd pnp-0.4.13

[root@localhost pnp-0.4.13]# ./configure --with-nagios-user=nagios --with-nagios-group=nagios --with-rrdtool=/usr/local/rrdtool/bin/rrdtool --with-perfdata-di

r=/usr/local/nagios/share/perfdata ; make all ; make install ; make install-config ; make install-init

3） 配置PNP

A,创建默认配置文件

[root@localhost pnp-0.4.13]# cd /usr/local/nagios/etc/pnp/

[root@localhost pnp]# cp process_perfdata.cfg-sample process_perfdata.cfg

[root@localhost pnp]# cp npcd.cfg-sample npcd.cfg

[root@localhost pnp]# cp rra.cfg-sample rra.cfg

[root@localhost pnp]# chown -R nagios:nagios /usr/local/nagios/etc/pnp/

B，修改process_perfdata.cfg

[root@localhost pnp]# vi /usr/local/nagios/etc/pnp/process_perfdata.cfg

44 LOG_LEVEL = 2

4） 修改Nagios主配置文件

A,增加小太阳图标

[root@localhost pnp]# cd /usr/local/nagios/etc/

[root@localhost etc]# vi templates.cfg

define host{

        name    hosts-pnp

        register        0

        action_url      /nagios/pnp/index.php?host=$HOSTNAME$

        process_perf_data       1

}

define service{

        name    services-pnp

        register        0

        action_url      /nagios/pnp/index.php?host=$HOSTNAME$&srv=$SERVICEDESC$

        process_perf_data       1

}

B、修改nagios.cfg

找到如下几行去掉注释

[root@localhost etc]# vi nagios.cfg

833 process_performance_data=1

845 host_perfdata_command=process-host-perfdata

846 service_perfdata_command=process-service-perfdata

 

C、修改commands.cfg（注释掉原来的command_line原有的配置，更改成下面的配置）

227 # 'process-host-perfdata' command definition

    228 define command{

    229         command_name    process-host-perfdata

    230         command_line    /usr/local/nagios/libexec/process_perfdata.pl

    231         }

    232

    233

    234 # 'process-service-perfdata' command definition

    235 define command{

    236         command_name    process-service-perfdata

    237         command_line    /usr/local/nagios/libexec/process_perfdata.pl

    238         }

D、修改hosts.cfg文件和services.cfg文件

[root@localhost ~]# vi /usr/local/nagios/etc/hosts.cfg（在use这行后面增加hosts-pnp）

define host{

use     linux-server,hosts-pnp

host_name       web

alias   benet-web

address 192.168.6.199

}

define host{

use     linux-server,hosts-pnp

host_name       mysql

alias   benet-mysql

address 192.168.6.200

}

define hostgroup{

hostgroup_name sa-servers

alias   sa servers

members web,mysql

}

[root@localhost ~]# vi /usr/local/nagios/etc/services.cfg（在use这行后面增加service-pnp）

################- benet web -##########################

define service{

use     local-service,services-pnp

host_name       web

service_description     PING

check_command   check_ping!100.0,20%!500.0,60%

}

define service{

use     local-service,services-pnp

host_name       web

service_description     SSH

check_command   check_ssh

}

注意项：别心急看小太阳数据，等会儿就有了。

点击小太阳，出现对主机或服务的监控页面

点击小太阳后如果出现下面的错误：

Initalising Using /usr/local/nagios/share/perfdata/ RRDTool /usr/local/rrdtool/bin/rrdtool found. RRDTool /usr/local/rrdtool/bin/rrdtool is executable PHP Function proc_open is enabled PHP Function fpassthru is enabled PHP Function xml_parser_create is enabled PHP zlib Support found. PHP GD Support not found.

这说明你没有安装php-gd这个包，请利用yum –y install php-gd来安装此包，然后重新启动一下httpd服务和nagios服务，此问题就可以解决。