监控系统 - pnp4nagios

pnp4nagios是nagios的一个插件，用于将perfdata数据写入rrd，用于展示流量图，目前最高版本0.6.25。

我用官方下载的tar.gz打rpm包，官方提供的pnp4nagios.spec 需要更改几处，才能顺利打包

version:    0.6.16 =>0.6.25

%build
--with-perfdata-spool-dir=%{_localstatedir}/spool/nagios  => --with-perfdata-spool-dir=%{_localstatedir}/nagios/spool

%files
增加
%{_libexecdir}/rrd_modify.pl

pnp4nagios 依赖 php-gd 还有rrdtool-perl，这个记得一定不能少。

pnp4nagios支持多种rrd生成模式，我选择Bulk Mode with NPCD和Gearman Mode模式

nagios.cfg

# 开启perfdata数据生成
process_performance_data=1

# perfdata数据位置
host_perfdata_file=/var/nagios/host-perfdata
service_perfdata_file=/var/nagios/service-perfdata

# perfdata数据模板
host_perfdata_file_template=DATATYPE::HOSTPERFDATA\tTIMET::$TIMET$\tHOSTNAME::$HOSTNAME$\tHOSTPERFDATA::$HOSTPERFDATA$\tHOSTCHECKCOMMAND::$HOSTCHECKCOMMAND$\tHOSTSTATE::$HOSTSTATE$\tHOSTSTATETYPE::$HOSTSTATETYPE$
service_perfdata_file_template=DATATYPE::SERVICEPERFDATA\tTIMET::$TIMET$\tHOSTNAME::$HOSTNAME$\tSERVICEDESC::$SERVICEDESC$\tSERVICEPERFDATA::$SERVICEPERFDATA$\tSERVICECHECKCOMMAND::$SERVICECHECKCOMMAND$\tHOSTSTATE::$HOSTSTATE$\tHOSTSTATETYPE::$HOSTSTATETYPE$\tSERVICESTATE::$SERVICESTATE$\tSERVICESTATETYPE::$SERVICESTATETYPE$

host_perfdata_file_mode=a
service_perfdata_file_mode=a

host_perfdata_file_processing_interval=15
service_perfdata_file_processing_interval=15

# perfdata数据文件处理命令，这个与pnp4nagios相关
host_perfdata_file_processing_command=process-host-perfdata-file
service_perfdata_file_processing_command=process-service-perfdata-file

commands

# 与Bulk Mode with NPCD模式对应，对应图示 - 步骤3
define command {
       command_name    process-host-perfdata-file
       command_line    /bin/mv /var/nagios/host-perfdata /var/nagios/spool/host-perfdata.$TIMET$
}

define command {
       command_name    process-service-perfdata-file
       command_line    /bin/mv /var/nagios/service-perfdata /var/nagios/spool/service-perfdata.$TIMET$
}

config.php

$views[] = array('title' => 'One Hour',  'start' => (60*60) );
$conf['RRD_DAEMON_OPTS'] = 'unix:/var/run/rrdcached.sock';

npcd.cfg

# 日志，用于调试
log_type = file
log_file = /var/log/nagios/npcd.log
log_level = 1

# pnp4nagios spool目录，与commands.cfg要对应
perfdata_spool_dir = /var/nagios/spool
npcd_max_threads = 10

# /var/nagios/spool目录扫描间隔
sleep_time = 15

process_perfdata.cfg

# rrd存储目录，与pnp4nagios的config.php对应
RRDPATH = /usr/share/pnp4nagios/perfdata

# 日志，用于调试
LOG_FILE = /var/log/nagios/perfdata.log
LOG_LEVEL = 1

# 使用rrdcached降低压力
RRD_DAEMON_OPTS = unix:/var/run/rrdcached.sock

/usr/share/pnp4nagios/templates.dist/default.php

默认模板里rrdtool配置参数与rrdtool 1.6不兼容，需要修改
--lower => --lower-limit
--upper => --upper-limit

启动

systemctl restart nagios
systemctl restart npcd

mod-gearman

#/etc/mod_gearman/module.conf

perfdata=yes
perfdata_send_all=yes
perfdata_mode=1

process_perfdata.cfg

# rrd存储目录，与pnp4nagios的config.php对应
RRDPATH = /usr/share/pnp4nagios/perfdata

# 日志，用于调试
LOG_FILE = /var/log/nagios/perfdata.log
LOG_LEVEL = 1

# 使用rrdcached降低压力
RRD_DAEMON_OPTS = unix:/var/run/rrdcached.sock

# 子进程数量
PREFORK = 20

# 指定gearmand服务器的地址
GEARMAN_HOST = xxx.xxx.xxx.xxx:4730

启动

systemctl restart nagios
systemctl restart pnp_gearmand_work