Nagios 部署步骤
安装扩展源
yum install -y epel-release安装nagios、插件、制图软件
yum install -y nagios nagios-plugins-all nagios-plugins-nt pnp4nagios启动nagios
[root@review ~]# systemctl start nagios
[root@review ~]# ps aux|grep nagios
nagios 7500 5.7 0.2 51560 4560 ? Ss 01:23 0:00 /usr/sbin/nagios -d /etc/nagios/nagios.cfg
nagios 7501 0.0 0.1 42044 1924 ? S 01:23 0:00 /usr/sbin/nagios --worker /var/spool/nagios/cmd/nagios.qh
nagios 7502 0.0 0.1 42696 2188 ? S 01:23 0:00 /usr/sbin/nagios --worker /var/spool/nagios/cmd/nagios.qh
nagios 7503 0.0 0.1 42044 1928 ? S 01:23 0:00 /usr/sbin/nagios --worker /var/spool/nagios/cmd/nagios.qh
nagios 7504 0.0 0.1 42044 1928 ? S 01:23 0:00 /usr/sbin/nagios --worker /var/spool/nagios/cmd/nagios.qh
nagios 7505 0.0 0.1 51560 1968 ? S 01:23 0:00 /usr/sbin/nagios -d /etc/nagios/nagios.cfg
root 7509 0.0 0.0 112724 988 pts/0 S+ 01:23 0:00 grep --color=autonagios
启动web端
[root@review ~]# systemctl start httpd
[root@review ~]# ps aux|grep httpd
root 7525 0.6 0.6 336628 12912 ? Ss 01:26 0:00 /usr/sbin/httpd -DFOREGROUND
apache 7526 0.0 0.3 336764 6464 ? S 01:26 0:00 /usr/sbin/httpd -DFOREGROUND
apache 7527 0.0 0.3 336764 7220 ? S 01:26 0:00 /usr/sbin/httpd -DFOREGROUND
apache 7528 0.0 0.3 336764 6464 ? S 01:26 0:00 /usr/sbin/httpd -DFOREGROUND
apache 7529 0.0 0.3 336764 6464 ? S 01:26 0:00 /usr/sbin/httpd -DFOREGROUND
apache 7530 0.0 0.3 336764 6464 ? S 01:26 0:00 /usr/sbin/httpd -DFOREGROUND
root 7535 0.0 0.0 112724 988 pts/0 S+ 01:26 0:00 grep --color=autohttpd
浏览器登录
网址：http://IP地址/nagios/
默认用户和密码：nagiosadmin
pnp4nagios图形生成
选择 Bulk Mode with NPCD 模式。
进入/etc/pnp4nagios/nagios.cfg 将Bulk / NPCD mode模式下的内容复制出来：
[root@review pnp4nagios]# pwd
/etc/pnp4nagios
[root@review pnp4nagios]# ls
background.pdf config.php npcd.cfg process_perfdata.cfg
check_commands misccommands.cfg pages rra.cfg
config.d nagios.cfg pnp4nagios_release
[root@review pnp4nagios]# vim nagios.cfg
#
# Bulk / NPCD mode
#
process_performance_data=1
# *** the template definition differs from the one in the original nagios.cfg
#
service_perfdata_file=/var/log/pnp4nagios/service-perfdata
service_perfdata_file_template=DATATYPE::SERVICEPERFDATA\tTIMET::$TIMET$\tHOSTNAME::$HOSTNAME$\tSERVICEDESC::$SERVICEDESC$\tSERVICEPERFDATA::$SERVICEPERFDATA$\tSERVICECHECKCOMMAND::$SERVICECHECKCOMMAND$\tHOSTSTATE::$HOSTSTATE$\tHOSTSTATETYPE::$HOSTSTATETYPE$\tSERVICESTATE::$SERVICESTATE$\tSERVICESTATETYPE::$SERVICESTATETYPE$
service_perfdata_file_mode=a
service_perfdata_file_processing_interval=15
service_perfdata_file_processing_command=process-service-perfdata-file
# *** the template definition differs from the one in the original nagios.cfg
#
host_perfdata_file=/var/log/pnp4nagios/host-perfdata
host_perfdata_file_template=DATATYPE::HOSTPERFDATA\tTIMET::$TIMET$\tHOSTNAME::$HOSTNAME$\tHOSTPERFDATA::$HOSTPERFDATA$\tHOSTCHECKCOMMAND::$HOSTCHECKCOMMAND$\tHOSTSTATE::$HOSTSTATE$\tHOSTSTATETYPE::$HOSTSTATETYPE$
host_perfdata_file_mode=a
host_perfdata_file_processing_interval=15
host_perfdata_file_processing_command=process-host-perfdata-file添加到文件（/etc/nagios/nagios.cfg）末尾。
进入 /etc/pnp4nagios/misccommands.cfg 将下面内容复制出来：
#
# Bulk with NPCD mode
#
#define command {
# command_name process-service-perfdata-file
# command_line /bin/mv /var/log/pnp4nagios/service-perfdata /var/spool/pnp4nagios/service-perfdata.$TIMET$
#}
#define command {
# command_name process-host-perfdata-file
# command_line /bin/mv /var/log/pnp4nagios/host-perfdata /var/spool/pnp4nagios/host-perfdata.$TIMET$
#}添加到文件（/etc/nagios/objects/commands.cfg）末尾，注意：要去掉注释。
#
# Bulk with NPCD mode
#
define command {
command_name process-service-perfdata-file
command_line /bin/mv /var/log/pnp4nagios/service-perfdata /var/spool/pnp4nagios/service-perfdata.$TIMET$
}
define command {
command_name process-host-perfdata-file
command_line /bin/mv /var/log/pnp4nagios/host-perfdata /var/spool/pnp4nagios/host-perfdata.$TIMET$
}重启
[root@review objects]# systemctl restart nagios
[root@review objects]# systemctl restart httpd
[root@review objects]# systemctl restart npcd
查询下面目录中是否有对应文件
[root@review ~]# ll /var/lib/pnp4nagios/localhost/
总用量 5300
-rw-rw-r--. 1 nagios nagios 1151496 10月 24 02:20 Current_Load.rrd
-rw-rw-r--. 1 nagios nagios 3353 10月 24 02:20 Current_Load.xml
-rw-rw-r--. 1 nagios nagios 384952 10月 24 02:20 Current_Users.rrd
-rw-rw-r--. 1 nagios nagios 1931 10月 24 02:20 Current_Users.xml
-rw-rw-r--. 1 nagios nagios 768224 10月 24 02:21 _HOST_.rrd
-rw-rw-r--. 1 nagios nagios 2489 10月 24 02:21 _HOST_.xml
-rw-rw-r--. 1 nagios nagios 768224 10月 24 02:20 HTTP.rrd
-rw-rw-r--. 1 nagios nagios 2505 10月 24 02:20 HTTP.xml
-rw-rw-r--. 1 nagios nagios 768224 10月 24 02:21 PING.rrd
-rw-rw-r--. 1 nagios nagios 2595 10月 24 02:21 PING.xml
-rw-rw-r--. 1 nagios nagios 384952 10月 24 02:21 Root_Partition.rrd
-rw-rw-r--. 1 nagios nagios 1979 10月 24 02:21 Root_Partition.xml
-rw-rw-r--. 1 nagios nagios 384952 10月 24 02:22 SSH.rrd
-rw-rw-r--. 1 nagios nagios 1893 10月 24 02:22 SSH.xml
-rw-rw-r--. 1 nagios nagios 384952 10月 24 02:20 Swap_Usage.rrd
-rw-rw-r--. 1 nagios nagios 1945 10月 24 02:20 Swap_Usage.xml
-rw-rw-r--. 1 nagios nagios 384952 10月 24 02:20 Total_Processes.rrd
-rw-rw-r--. 1 nagios nagios 1973 10月 24 02:20 Total_Processes.xml
浏览器访问：http://192.168.1.91/pnp4nagios
默认用户密码都是nagiosadmin
pnp4nagios主页图形生成
vim /etc/nagios/objects/templates.cfg
在末尾添加：
define host {
name host-pnp
action_url /pnp4nagios/index.php/graph?host=$HOSTNAME$&srv=_HOST_
register 0
}
define service {
name service-pnp
action_url /pnp4nagios/index.php/graph?host=$HOSTNAME$&srv=$SERVICEDESC$
register 0
}
在templates.cfg文件中找到 generic-host 末尾添加一行内容
define host {
name generic-host ; The name of this host template
notifications_enabled 1 ; Host notifications are enabled
event_handler_enabled 1 ; Host event handler is enabled
flap_detection_enabled 1 ; Flap detection is enabled
process_perf_data 1 ; Process performance data
retain_status_information 1 ; Retain status information across program restarts
retain_nonstatus_information 1 ; Retain non-status information across program restarts
notification_period 24x7 ; Send host notifications at any time
register 0 ; DON'T REGISTER THIS DEFINITION - ITS NOT A REAL HOST, JUST A TEMPLATE!
use host-pnp ; add context（添加这行）
}找到 generic-service 末尾添加一行内容
define service {
name generic-service ; The 'name' of this service template
active_checks_enabled 1 ; Active service checks are enabled
passive_checks_enabled 1 ; Passive service checks are enabled/accepted
parallelize_check 1 ; Active service checks should be parallelized (disabling this can lead to major performance problems)
obsess_over_service 1 ; We should obsess over this service (if necessary)
check_freshness 0 ; Default is to NOT check service 'freshness'
notifications_enabled 1 ; Service notifications are enabled
event_handler_enabled 1 ; Service event handler is enabled
flap_detection_enabled 1 ; Flap detection is enabled
process_perf_data 1 ; Process performance data
retain_status_information 1 ; Retain status information across program restarts
retain_nonstatus_information 1 ; Retain non-status information across program restarts
is_volatile 0 ; The service is not volatile
check_period 24x7 ; The service can be checked at any time of the day
max_check_attempts 3 ; Re-check the service up to 3 times in order to determine its final (hard) state
check_interval 10 ; Check the service every 10 minutes under normal conditions
retry_interval 2 ; Re-check the service every two minutes until a hard state can be determined
contact_groups admins ; Notifications get sent out to everyone in the 'admins' group
notification_options w,u,c,r ; Send notifications about warning, unknown, critical, and recovery events
notification_interval 60 ; Re-notify about service problems every hour
notification_period 24x7 ; Notifications can be sent out at any time
register 0 ; DON'T REGISTER THIS DEFINITION - ITS NOT A REAL SERVICE, JUST A TEMPLATE!
use service-pnp ; add context（添加这行）
}
重启
systemctl restart nagios
systemctl restart httpd
systemctl restart npcd浏览器登录 http://192.168.1.91/nagios/
监控Linux
服务端配置
yum install nagios-plugins-nrpe -y
yum install nrpe -y
vim /etc/nagios/objects/commands.cfg添加command
define command{
command_name check_nrpe
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
}
define command{
command_name check_mem
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c check_mem
}
define command{
command_name check_cpu
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c check_cpu
}被监控端配置
yum install nrpe -y添加监控项
vim /etc/nagios/nrpe.cfg
command[check_mem]=/usr/lib64/nagios/plugins/check_mem.sh -w 80 -c 90
command[check_cpu]=/usr/lib64/nagios/plugins/check_cpu.sh -w 80 -c 90
编写脚本监控内存
vim /usr/lib64/nagios/plugins/check_memory.sh
#!/bin/bash
# Get total memory and free memory
TOTAL=`free -m | grep Mem | awk '{print $2}'`
FREE=`free -m | grep Mem | awk '{print $4}'`
# Calculate memory usage percentage
USED=`echo "scale=2; 100 - (($FREE/$TOTAL) * 100)" | bc`
# Check memory usage against warning and critical thresholds
if [ $USED -ge $1 ] && [ $USED -lt $2 ]; then
echo "WARNING - Memory usage is at ${USED}%"
exit 1
elif [ $USED -ge $2 ]; then
echo "CRITICAL - Memory usage is at ${USED}%"
exit 2
else
echo "OK - Memory usage is at ${USED}%"
exit 0
fi
编写脚本监控cpu
vim /usr/lib64/nagios/plugins/check_cpu.sh
#!/bin/bash
# Get CPU usage percentage
CPU=`top -bn1 | grep load | awk '{printf "%.2f%%\n", $(NF-2)}'`
# Remove '%' sign from CPU usage
CPU=${CPU%?}
# Check CPU usage against warning and critical thresholds
if [ ${CPU%.*} -ge $1 ] && [ ${CPU%.*} -lt $2 ]; then
echo "WARNING - CPU usage is at ${CPU}"
exit 1
elif [ ${CPU%.*} -ge $2 ]; then
echo "CRITICAL - CPU usage is at ${CPU}"
exit 2
else
echo "OK - CPU usage is at ${CPU}"
exit 0
fi
给脚本可执行权限
chmod +x /usr/lib64/nagios/plugins/check_memory.sh
chmod +x /usr/lib64/nagios/plugins/check_cpu.sh启动 nrpe
systemctl start nrpe && systemctl enable nrpe监控windows
安装插件
vim /etc/nagios/objects/windows.cfg
# 添加主机
define host {
use windows-server
host_name winserver
alias My Windows Server
address 192.168.1.100
}
# 加入组
define hostgroup {
hostgroup_name windows-servers
alias Windows Servers
}
#需要监控的服务
define service {
use generic-service
host_name winserver
service_description NSClient++ Version
check_command check_nt!CLIENTVERSION
}vim /etc/nagios/nagios.cfg
# cfg_file=/etc/nagios/objects/windows.cfg
# 修改为
cfg_file=/etc/nagios/objects/windows.cfg重启nagios、httpd、npcd
systemctl restart nagios
systemctl restart httpd
systemctl restart npcd
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