監控系統 - pnp4nagios

pnp4nagios是nagios的一個插件，用於將perfdata數據寫入rrd，用於展現流量圖，目前最高版本0.6.25。

我用官方下載的tar.gz打rpm包，官方提供的pnp4nagios.spec 須要更改幾處，才能順利打包

version:    0.6.16 =>0.6.25

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

%files
增長
%{_libexecdir}/rrd_modify.pl

pnp4nagios 依賴 php-gd 還有rrdtool-perl，這個記得必定不能少。

pnp4nagios支持多種rrd生成模式，我選擇Bulk Mode with NPCD和Gearman Mode模式

nagios.cfg

# 開啓perfdata數據生成
process_performance_data=1

# perfdata數據位置
host_perfdata_file=/var/nagios/host-perfdata
service_perfdata_file=/var/nagios/service-perfdata

# perfdata數據模板
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數據文件處理命令，這個與pnp4nagios相關
host_perfdata_file_processing_command=process-host-perfdata-file
service_perfdata_file_processing_command=process-service-perfdata-file

commands

# 與Bulk Mode with NPCD模式對應，對應圖示 - 步驟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

# 日誌，用於調試
log_type = file
log_file = /var/log/nagios/npcd.log
log_level = 1

# pnp4nagios spool目錄，與commands.cfg要對應
perfdata_spool_dir = /var/nagios/spool
npcd_max_threads = 10

# /var/nagios/spool目錄掃描間隔
sleep_time = 15

process_perfdata.cfg

# rrd存儲目錄，與pnp4nagios的config.php對應
RRDPATH = /usr/share/pnp4nagios/perfdata

# 日誌，用於調試
LOG_FILE = /var/log/nagios/perfdata.log
LOG_LEVEL = 1

# 使用rrdcached下降壓力
RRD_DAEMON_OPTS = unix:/var/run/rrdcached.sock

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

默認模板裏rrdtool配置參數與rrdtool 1.6不兼容，須要修改
--lower => --lower-limit
--upper => --upper-limit

啓動

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存儲目錄，與pnp4nagios的config.php對應
RRDPATH = /usr/share/pnp4nagios/perfdata

# 日誌，用於調試
LOG_FILE = /var/log/nagios/perfdata.log
LOG_LEVEL = 1

# 使用rrdcached下降壓力
RRD_DAEMON_OPTS = unix:/var/run/rrdcached.sock

# 子進程數量
PREFORK = 20

# 指定gearmand服務器的地址
GEARMAN_HOST = xxx.xxx.xxx.xxx:4730

啓動

systemctl restart nagios
systemctl restart pnp_gearmand_work