云监控 Nagios 安装步骤
前言最近在研究云监控的相关工具，之前写过Ganglia的安装步骤，这回来记录下Nagios的安装步骤。
本文不讲解相关原理,若想了解请参考其他资料.
本文目的: 即使之前未触过nagios,也能按照文中步骤搭建自己的nagios监控集群.
@Author duangr
@Website http://my.oschina.net/duangr/blog/183160
1. Nagios简介
Nagios是一个可运行在Linux/Unix平台之上的开源监视系统，可以用来监视系统运行状态和网络信息。Nagios可以监视所指定的本地或远程主机以及服务，同时提供异常通知功能。在系统或服务状态异常时发出邮件或短信报警第一时间通知网站运维人员，在状态恢复后发出正常的邮件或短信通知。
2. 相关环境
Host NameIPOS
Archduangr-1192.168.56.10CentOS 6.4x86_64duangr-2192.168.56.11
CentOS 6.4
x86_64
duangr-3192.168.56.12
CentOS 6.4
x86_64
3. 部署规划
项值监控服务主节点(Master)
duangr-1
被监控从节点(Slave)duangr-2, duangr-3Nagios主节点需要安装:
[*]nagios
[*]nagios-plugin
[*]nrpe
[*]php
[*]apache
Nagios从节点需要安装:
[*]nagios-plugin
[*]nrpe
安装路径规划
项值nagios安装路径
/usr/local/nagios
php安装路径/usr/local/php
apache安装路径/usr/local/apache2
4. 代码获取
[*]nagios-4.0.2.tar.gz
[*]nagios-plugins-1.5.tar.gz
[*]nrpe-2.15.tar.gz
[*]httpd-2.2.23.tar.gz
[*]php-5.4.10.tar.gz
5. 前提依赖
5.1 主机环境检查(全部节点)
2gcc-4.4.7-3.el6.x86_644glibc-common-2.14.1-6.x86_646package gd-devel is not installed8openssl-devel-1.0.0-27.el6.x86_64
若有缺失,请先安装. 可通过如下几个镜像网站下载相关安装包:
[*]http://rpm.pbone.net/
[*]http://mirrors.163.com/centos/6.4/os/x86_64/Packages/
[*]http://mirrors.sohu.com/centos/6.4/os/x86_64/Packages/
安装后再次检查如下:
2gcc-4.4.7-3.el6.x86_644glibc-common-2.14.1-6.x86_646gd-devel-2.0.35-11.el6.x86_648openssl-devel-1.0.0-27.el6.x86_64
6. 编译安装
6.1 创建用户nagios(全部节点)
2passwd nagios (密码自定义)
6.2 安装nagios主程序(主节点安装)
2cd nagios-4.0.24make all1chkconfig --add nagios 3chkconfig --level 35 nagios on5nagios 0:关闭 1:关闭 2:关闭 3:启用 4:关闭 5:启用 6:关闭
6.3 安装nagios插件(全部节点安装)
2cd nagios-plugins-1.54make && make install
如果出现mysql相关的编译错误,是mysql的默认安装路径被修改导致的,调整with-mysql后重新make
2make && make install
6.4 安装NRPE(全部节点安装)
2cd nrpe-2.154make all1make install-daemon && make install-daemon-config && make install-xinetd
6.4.1 被监控节点配置
如果是被监控节点,需要配置NRPE已守护进程运行(通过xinetd来运行)
1、更改/etc/xinetd.d/nrpe文件，设置允许nagios主节点服务器连接
2only_from = 127.0.0.1 192.168.56.10
2、在/etc/services结尾增加：
1vi /usr/local/nagios/etc/nrpe.cfg1service xinetd restart
5、验证nrpe是否监听
1/usr/local/nagios/libexec/check_nrpe -H localhost1/usr/local/nagios/libexec/check_nrpe -H 192.168.56.113/usr/local/nagios/libexec/check_nrpe -H 192.168.56.121tar -zxf httpd-2.2.23.tar.gz3./configure --prefix=/usr/local/apache21cd /export/home/tools/soft/php3cd /php-5.4.105make && make install
6.7 使用apache 发布PHP的WEB
vi /usr/local/apache2/conf/httpd.conf
02Listen 800406 AddType application/x-httpd-php .php08....10ScriptAlias /nagios/cgi-bin "/usr/local/nagios/sbin"12 AuthType Basic14 AllowOverride None16 Allow from all18 AuthUserFile /usr/local/nagios/etc/htpasswd202224 Options None26 Order allow,deny28 AuthName "nagios Access"30 Require valid-user1/usr/local/apache2/bin/htpasswd -c /usr/local/nagios/etc/htpasswd admin
启动apache
1# su - nagios1command=/usr/local/nagios/libexec/check_users -w $ARG1$ -c $ARG2$3command=/usr/local/nagios/libexec/check_disk -w $ARG1$ -c $ARG2$ -p $ARG3$5command=/usr/local/nagios/libexec/check_procs $ARG1$1service xinetd restart
7.1.3 校验配置
检查监控命令配置是否ok
2/usr/local/nagios/libexec/check_nrpe -H localhost -c check_load -a 15,10,5 30,25,204/usr/local/nagios/libexec/check_nrpe -H localhost -c check_procs -a 200 400 RSZDT1default_user_name=admin3authorized_for_configuration_information=nagiosadmin,admin5authorized_for_all_services=nagiosadmin,admin7authorized_for_all_service_commands=nagiosadmin,admin1#cfg_file=/export/home/nagios/etc/objects/localhost.cfg (注释掉)1cd /usr/local/nagios/etc3cd servers
7.2.3 定义监控的主机组
声明一个监控的主机组,将主机环境中提到的三台主机全部加入监控
vi /export/home/nagios/etc/servers/group.cfg
新文件,内容如下:
2 hostgroup_name duangr-server4 members duangr-1,duangr-2,duangr-301define host{03 host_name duangr-105 address 192.168.56.1007 09 use local-service11 service_description Host Alive13 }15 use local-service17 service_description Users19 }21 use local-service23 service_description CPU25 }27 use local-service29 service_description Disk Root31 }33 use local-service35 service_description Disk Home37 }39 use local-service41 service_description Zombie Procs43 }45 use local-service47 service_description Total Procs49 }51 use local-service53 service_description Swap Usage55 }
说明下,由于是此主机也是监控服务主节点所在主机,因此可以使用check_local_* 的相关命令来进行监控.
这个文件中已经将常用的监控项配置进去.
7.2.4.2 远程主机监控配置
再定义远程主机duangr-2和duangr-3
定义远程主机的监控之前,需要先定义check_nrpe命令
vi /usr/local/nagios/etc/objects/commands.cfg
在文件的最后面添加如下内容:
2define command{4 command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -t 30 -c $ARG1$6define command{8 command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -t 30 -c $ARG1$ -a $ARG2$001define host{003 host_name duangr-2005 address 192.168.56.11007 009 use local-service011 service_description Host Alive013 }015 use local-service017 service_description Users019 }021 use local-service023 service_description CPU025 }027 use local-service029 service_description Disk Root031 }033 use local-service035 service_description Disk /export/home037 }039 use local-service041 service_description Procs Zombie043 }045 use local-service047 service_description Procs Total049 }051 use local-service053 service_description Swap Usage055 }057;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;059;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;061define service{063 host_name duangr-2065 check_command check_nrpe_args!check_procs_args!"-c1:1 -Ccrond"067;; 监控zookeeper进程069 use local-service071 service_description PS: QuorumPeerMain073 }075define service{077 host_name duangr-2079 check_command check_nrpe_args!check_procs_args!"-c1:1 -Cjava -adaemon.supervisor"081;; 监控storm的主节点进程083 use local-service085 service_description PS: nimbus087 }089define service{091 host_name duangr-2093 check_command check_nrpe_args!check_procs_args!"-c1:1 -Cjava -ametamorphosis-server-w"095;; 监控Redis进程097 use local-service099 service_description PS: redis-server101 }103define service{105 host_name duangr-2107 check_command check_nrpe_args!check_procs_args!"-c1:1 -Cjava -aserver.namenode.NameNode"109;; 监控hadoop主节点SecondaryNameNode进程111 use local-service113 service_description PS: SecondaryNameNode115 }117define service{119 host_name duangr-2121 check_command check_nrpe_args!check_procs_args!"-c1:1 -Cjava -aserver.resourcemanager.ResourceManager"123;; 监控hadoop从节点DataNode进程125 use local-service127 service_description PS: DataNode129 }131define service{133 host_name duangr-2135 check_command check_nrpe_args!check_procs_args!"-c1:1 -Cjava -aserver.nodemanager.NodeManager"1define contact{3 use generic-contact ; Inherit default values from generic-contact template (defined above)5 email yourname@domain.com 7 }
除了配置监控邮件的接收人外,还要确保:
[*]本主机与邮件服务器互通
[*]本主机SendMail可以使用外部SMTP服务发送邮件
7.2.4.4 校验配置
1/usr/local/nagios/bin/nagios -d /usr/local/nagios/etc/nagios.cfg
nagios已经是一个服务,也可以执行如下操作:
页:
[1]