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分类: LINUX

2011-06-14 16:33:25

由于公司业务服务器分布比较广,如果按照之前的监控架构的话,就是每个IDC增加一个nagios监控,想来这样子也有好处,可以互相监控,但是由于每个IDC部署一个nagios,无疑增加了监控人员的查看难度,所以就研究了一下分布式nagios监控。


一,分角色
1,监控中心服务器,分布式服务器,被监控服务器
监控中心服务器:通过NSCA获取分布式监控服务器的相关状态,呈现相关服务器状态和发出报警等;
分布式服务器:通过对被监控服务器状态采集并且把被监控服务器的状态通过NSCA_send发送给监控中心服务器。
被监控服务器:被监控服务器就是生产环境服务器。

二,详细部署
1,被监控服务器
tar -zxvf nagios-plugins-1.4.15.tar.gz
cd nagios-plugins-1.4.15
./configure
make
make install
chown nagios.nagios /usr/local/nagios
chown nagios.nagios /usr/local/nagios
cd ..
ls
tar -zxvf nrpe-2.12.tar.gz 
pwd
ls
cd nrpe-2.12
./configure 
make all
make install-plugin
make install-daemon
make install-daemon-config
vi /usr/local/nagios/etc/nrpe.cfg
将allowed_hosts=127.0.0.1
修改成你的nagios分布式服务器的ip
/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d   #启动nrpe
netstat -anl|grep 5666 #测试监听端口
2,安装分布式服务器
useradd nagios
passwd nagios
groupadd nagcmd
usermod -G nagcmd nagios
usermod -G nagcmd apache           #创建Nagios用户 创建组 把用户加入组 并加入apche
tar -zxvf nagios-3.2.3.tar.gz 
cd nagios-3.2.3
./configure --with-command-group=nagcmd
make all
make install
make install-init
make install-config
make install-commandmode

tar -zxvf nagios-plugins-1.4.15.tar.gz 
cd nagios-plugins-1.4.15
./configure --with-nagios-user=nagios --with-nagios-group=nagcmd
make
make install
chkconfig --add nagios
chkconfig nagios on

tar -zxvf nrpe-2.12.tar.gz 
cd nrpe-2.12
./configure 
make all
make install-plugin
/usr/local/nagios/libexec/check_nrpe -H 192.168.20.100                   #测试被监控服务器是否连通,正常情况下会返回被监控端的NRPE版本
vi /usr/local/nagios/etc/objects/commands.cfg
#check nrpe
define command{
       command_name check_nrpe
       command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
       }                                                                #添加nrpe外部检测命令

tar -zxvf nsca-2.7.2.tar.gz 
cd nsca-2.7.2
./configure
make all
cp sample-config/send_nsca.cfg /usr/local/nagios/etc/
cd /usr/local/nagios/etc/
chown nagios.nagios send_nsca.cfg 
cp src/send_nsca /usr/local/nagios/bin/
cd /usr/local/nagios/bin/
chown nagios.nagios send_nsca 
vi /usr/local/nagios/libexec/submit_check_result                          #创建脚本

#!/bin/sh
        # Arguments:
        #  $1 = host_name (Short name of host that the service is
        #       associated with)
        #  $2 = svc_description (Description of the service)
        #  $3 = state_string (A string representing the status of
        #       the given service - "OK", "WARNING", "CRITICAL"
        #       or "UNKNOWN")
        #  $4 = plugin_output (A text string that should be used
        #       as the plugin output for the service checks)
        #

        # Convert the state string to the corresponding return code
        return_code=-1

        case "$3" in
                    OK)
                    return_code=0
                        ;;
                WARNING)
                    return_code=1
                        ;;
                CRITICAL)
                    return_code=2
                        ;;
                UNKNOWN)
                    return_code=-1
                        ;;
        esac
        # pipe the service check info into the send_nsca program, which
        # in turn transmits the data to the nsca daemon on the central
        # monitoring server

        /bin/printf "%s\t%s\t%s\t%s\n" "$1" "$2" "$return_code" "$4" | /usr/local/nagios/bin/send_nsca 192.168.20.195 -c  /usr/local/nagios/etc/send_nsca.cfg                             #此处的IP地址为监控中心服务器。
chmod +x /usr/local/nagios/libexec/submit_check_result 
chown nagios.nagios /usr/local/nagios/libexec/submit_check_result 


vi /usr/local/nagios/etc/objects/commands.cfg       #增加如下检测命令

define command{
        command_name    submit_check_result
        command_line    /usr/local/nagios/libexec/submit_check_result $HOSTNAME$ '$SERVICEDESC$' $SERVICESTATE$ '$SERVICEOUTPUT$'
        }

vi /usr/local/nagios/etc/nagios.cfg
enable_notifications=0                          #禁用告警
obsess_over_services=1 #开启被动监控
ocsp_command=submit_check_result #定义每次执行完检查后执行的命令
obsess_over_hosts=1 #开启主机被动监控
ochp_command=submit_check_result #指定每次执行完主机检查后执行的命令

vi /usr/local/nagios/etc/send_nsca.cfg
password=urgamer #设置密码,此处设置的密码要和监控中心服务器一致

配置被监控的服务器,此处配置在分布式监控服务器上配置
cd /usr/local/nagios/etc/objects/
vi hosts.cfg
define host{
        use                     linux-server            ; Name of host template to use
                                                        ; This host definition will inherit all variables that are defined
                                                        ; in (or inherited by) the linux-server host template definition.
        host_name               urg-test01
        alias                   linux-test01
        address                 192.168.20..100
        }
vi services.cfg


        define service{
        use                             local-service         ; Name of service template to use
        host_name                       urg-test01
        service_description             PING
        check_command                   check_ping!100.0,20%!500.0,60%
        }
define service{
        use                             local-service         ; Name of service template to use
        host_name                       urg-test01
        service_description             Root Partition
        check_command                   check_nrpe!check_local_disk!20%!10%!/
        }
define service{
        use                             local-service         ; Name of service template to use
        host_name                       urg-test01
        service_description             Current Users
        check_command                   check_nrpe!check_local_users!20!50
        }
define service{
        use                             local-service         ; Name of service template to use
        host_name                       urg-test01
        service_description             Total Processes
        check_command                   check_nrpe!check_local_procs!250!400!RSZDT
        }



 vi nagios.cfg                                     #添加以下两行配置
cfg_file=/usr/local/nagios/etc/objects/hosts.cfg
cfg_file=/usr/local/nagios/etc/objects/services.cfg
 /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg #检查配置文件
  service nagios start                                            #启动nagios
3,安装监控中心服务器
首先确认监控中心服务器已经安装了apache且禁用了SElinux
useradd nagios
passwd nagios
groupadd nagcmd
usermod -G nagcmd nagios
usermod -G nagcmd apache           #创建Nagios用户 创建组 把用户加入组 并加入apche
tar -zxvf nagios-3.2.3.tar.gz
cd nagios-3.2.3
./configure --with-command-group=nagcmd
make all
make install
make install-init
make install-config
make install-commandmode 
make install-webconf  
htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin

tar xzf nagios-plugins-1.4.11.tar.gz
cd nagios-plugins-1.4.11
./configure --with-nagios-user=nagios --with-nagios-group=nagcmd
make
make install
chkconfig --add nagios
chkconfig nagios on    

tar -zxvf nsca-2.7.2.tar.gz
 cd nsca-2.7.2
 ./configure
 make all
cp /usr/local/src/nsca-2.7.2/src/nsca /usr/local/nagios/bin/
chown nagios:nagios /usr/local/nagios/bin/nsca
cp /usr/local/src/nsca-2.7.2/sample-config/nsca.cfg /usr/local/nagios/etc
chown nagios:nagios /usr/local/nagios/etc/nsca.cf

vi /usr/local/nagios/etc/nsca.cfg
password=urgamer             #此处和分布式监控服务器密码一致
vi /usr/local/nagios/etc/nagios.cfg
  check_external_commands=1 # 配置nagios检查扩展命令
  accept_passive_service_checks=1 # 配置接受被动服务检测的结果
  accept_passive_host_checks=1 #配置接受被动主机检测的结果

cd /usr/local/nagios/etc/
mkdir monitor
cd monitor
vi monitor.cfg
define host{
        use     linux-server
        host_name       urg-test01
        address         192,168,20.100
        passive_checks_enabled  1
        active_checks_enabled   0
}

define service{
        use     local-service
        host_name       urg-test01
        service_description Root Partiton
        check_command   check_local_disk!30%!10!/
        check_freshness         1
        freshness_threshold     450
        passive_checks_enabled  1
        active_checks_enables   0
}

/usr/local/nagios/bin/nsca -d -c /usr/local/nagios/nsca.cfg

service nagios restart
此时重新打开浏览器就换显示,新加的服务器。
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