如何部署nagios

系统环境:RHEL6 x86_64 selinux and iptables disabled
nagios 主机:192.168.2.20 server20.example.com mysql 主机: 192.168.2.21 server21.example.com #yum install httpd gcc make gd-devel perl-ExtUtils-Embed.x86_64 -y #编译所需软件包 nagios培训 #useradd nagios #运行 nagios服务的用户
#usermod -G nagios apache #使 apache用户对 nagios 目录具有写权限,不然web 页面操作失败 #tar jxf nagios-4.0.7.tar.gz #nagios 软件安装 #cd nagios-4.0.7 #./configure #make all #make install #make install-init #make install-commandmode #make install-config #make install-webconf #make install-exfoliation #make install-classicui #yum install mysql-devel openssl-devel -y #编译所需软件包 #tar zxf nagios-plugins-1.4.15.tar.gz #nagios 插件安装 #cd nagios-plugins-1.4.15 #./configure --with-nagios-user=nagios --with-nagios-group=nagios --enable-extra-opts --enable-libtap – enable-perl-modules #make #make install #vi /usr/local/nagios/etc/nagios.cfg #nagios 配置 cfg_file=/usr/local/nagios/etc/objects/hosts.cfg #新建 hosts.cfg 文件,存放主机与主机组定义 cfg_file=/usr/local/nagios/etc/objects/services.cfg #新建 services.cfg 文件,存放服务与服务组定义 #cfg_file=/usr/local/nagios/etc/objects/localhost.cfg #cd /usr/local/nagios/etc/objects #cp localhost.cfg hosts.cfg #cp localhost.cfg services.cfg #vi /usr/local/nagios/etc/objects/host.cfg define host{ use linux-server host_name server20.example.com alias Manager address 127.0.0.1 statusmap_image server.gd2 2d_coords 500,200 3d_coords 500,200,100 } define hostgroup{ #主机组并不是必须的,这是配合nagios 的监控页面的显示 hostgroup_name linux-servers alias Linux Servers members * } #vi /usr/local/nagios/etc/objects/services.cfg define service{ use local-service host_name * service_description PING check_command check_ping!100.0,20%!500.0,60% } define service{ use local-service host_name * service_description 根分区 check_command check_local_disk!20%!10%!/ nagios实施 }
define service{ use local-service host_name * service_description 登录用户数 check_command check_local_users!20!50 } define service{ use local-service host_name * service_description 进程数 check_command check_local_procs!250!400!RSZDT } define service{ use local-service host_name * service_description 系统负载 check_command check_local_load!5.0,4.0,3.0!10.0,6.0,4.0 } define servicegroup{ #服务组并不是必须的,这是配合nagios 的监控页面的显示 监控软件 servicegroup_name 系统状况检查
alias 系统概况 } #usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg #校验 nagios 配置文件的正确性 #htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin #nagios 监控页面访问用户和密码 #service nagios start #启动 nagios和 httpd 服务 #service httpd start nagios #访问 nagios监控页面,输入上面添加的用户名和密码 mysql 主机上运行有 mysql服务,在其上创建监控检测帐户
mysql> create database nagdb; mysql> grant select on nagdb.* to nagdb@'192.168.2.21'; mysql> flush privileges; 在 nagios 主机上检测是否可以连接mysql 主机上的 mysql 服务 /usr/local/nagios/libexec/check_mysql -H 192.168.2.20 -u nagdb -d nagdb Uptime: 73 Threads: 1 Questions: 7 Slow queries: 0 Opens: 15 Flush tables: 1 Open tables: 8 Queries per second avg: 0.95 在 nagios 主机上添加对mysql 服务监控的定义 #vi /usr/local/nagios/etc/objects/hosts.cfg 添加如下行 nagios配置 define host{
use linux-server host_name mysql 主机 alias mysql 服务器 address 192.168.2.20 statusmap_image server.gd2 2d_coords 500,200 3d_coords 500,200,100 } #vi /usr/local/nagios/etc/objects/services.cfg 添加如下行 define service{ use local-service host_name mysql 主机 servce_groups mysql 服务组 service_description mysql 服务 check_command check_mysql } define servicegroup{ servicegroup_name mysql 服务组 alias mysql 服务器 } #vi /usr/local/nagios/etc/objects/commands.cfg 添加如下行 define command{ command_name check_mysql command_line $USER1$/check_mysql -H $HOSTADDRESS$ -u nagdb -d nagdb } #/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg 开源监控软件 #service nagios reload
远程主机设定
#useradd nagios #tar xzf nagios-plugins-1.4.15.tar.gz #cd nagios-plugins-1.4.15 #./configure --with-nagios-user=nagios --with-nagios-group=nagios #make #make install #yum install xinetd -y #tar zxf nrpe-2.12.tar.gz #cd nrpe-2.12 #./configure #make all #make install-plugin #make install-daemon #make install-daemon-config #make install-xinetd #vi /etc/xinetd.d/nrpe 修改如下行 only_from = 192.168.0.71 #nagios 主机ip 地址 #vi /etc/services 添加如下行 nrpe 5666/tcp #nrpe 服务监听端口 #vi /usr/local/nagios/etc/nrpe.cfg 修改如下行 command[check_disk]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p / #根分区监测 #service xinetd restart #netstat -antlp |grep 5666 #tcp 0 0 :::5666 :::* LISTEN 26359/xinetd #看到如下输出说明NRPE 正常启动,并确保防火墙允许此端口 监控主机设定 #tar zxf nrpe-2.12.tar.gz #cd nrpe-2.12 #./configure --with-nagios-user=nagios --with-nagios-group=nagios 开源监控软件 #make all
#make install-plugin #/usr/local/nagios/libexec/check_nrpe -H 192.168.2.20 #如看到如下输出说明连接正常 NRPE v2.12 #vi /usr/local/nagios/etc/objects/commands.cfg 添加如下行 define command{ command_name check_nrpe command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$ } #vi /usr/local/nagios/etc/objects/services.cfg 添加如下行 define service{ use generic-service host_name mysql 主机 service_description CPU Load check_command check_nrpe!check_load } define service{ use generic-service host_name mysql 主机 service_description Current Users check_command check_nrpe!check_users } define service{ use generic-service host_name mysql 主机 service_description / Free Space check_command check_nrpe!check_disk } define service{ use generic-service host_name mysql 主机 service_description Total Processes check_command check_nrpe!check_total_procs } define service{ use generic-service host_name mysql 主机 service_description Zombie Processes check_command check_nrpe!check_zombie_procs } #/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg #service nagios reload