Nagios服务器架设之三

youngfan007

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。