本周的工作是做 Nagios 监控系统的初期调研，看了大量的网上资料，我初步确定 Nagios 的功能确实很强大，相比之前我搭建的 Cacti 监控系统，Nagios 监控服务器的状态更强大，并且报警功能也很不错，但对像流量这样的持续数据的展现能力却比较弱，不像 Cacti 监控系统将服务器的点状态和线状态都清晰的展现出来。所以我的研究表明，公司同时使用这两种监控系统是有必要的，而且我从网上找到了一种将 Nagios 整合到 Cacti 监控系统中的方法，如果这个方法行得通的话，公司的监控系统就完美了！具体的实现方法我会在自己测试后以博文的形式发布到我的博客里，下面就请大家跟我一起开始 Nagios 的安装旅程吧！
- 建立安装所需的系统用户和组，其中创建的 nagcmd 组用于从 Web 接口执行外部命令，所以需要将 Apache 服务的执行用户加入到该组中去。
[root@pubservicedb nagios]# groupadd -g 9000 nagios
[root@pubservicedb nagios]# groupadd -g 9001 nagcmd
[root@pubservicedb nagios]# useradd -u 9000 -g nagios -G nagcmd -s /sbin/nologin -c “Nagios Admin” nagios
[root@pubservicedb nagios]# grep “^User” /usr/local/apache/conf/httpd.conf
User daemon
[root@pubservicedb nagios]# usermod -G nagcmd daemon - 编译 Nagios 源程序包
[root@pubservicedb nagios-3.2.3]# ./configure –with-command-group=nagcmd –with-httpd-conf=/usr/local/apache/conf/conf.d/ –with-gd-lib=/usr/local/lib/ –with-gd-inc=/usr/local/includechecking for a BSD-compatible install… /usr/bin/install -c
… …
checking for mail… /bin/mail
We’ll use default routines (in xdata/xsddefault.*) for status data I/O…
We’ll use default routines (in xdata/xcddefault.*) for comment data I/O…
We’ll use default routines (in xdata/xrddefault.*) for retention data I/O…
We’ll use template-based routines (in xdata/xodtemplate.*) for object data I/O…
We’ll use default routines (in xdata/xpddefault.*) for performance data I/O…
We’ll use default routines (in xdata/xdddefault.*) for scheduled downtime data I/O…
checking ltdl.h usability… no
… …
config.status: creating include/cgiutils.hCreating sample config files in sample-config/ …
*** Configuration summary for nagios 3.2.3 10-03-2010 ***:
General Options:
————————-
Nagios executable: nagios
Nagios user/group: nagios,nagios
Command user/group: nagios,nagcmd
Embedded Perl: no
Event Broker: yes
Install ${prefix}: /usr/local/nagios
Lock file: ${prefix}/var/nagios.lock
Check result directory: ${prefix}/var/spool/checkresults
Init directory: /etc/rc.d/init.d
Apache conf.d directory: /etc/httpd/conf.d
Mail program: /bin/mail
Host OS: linux-gnuWeb Interface Options:
————————
HTML URL: http://localhost/nagios/
CGI URL: http://localhost/nagios/cgi-bin/
Traceroute (used by WAP): /bin/tracerouteReview the options above for accuracy. If they look okay,
type ‘make all’ to compile the main program and CGIs.[root@pubservicedb nagios-3.2.3]# make all
[root@pubservicedb nagios-3.2.3]# make install - 安装 Nagios 二进制程序、初始化脚本、配置文件示例并设置运行目录权限
[root@pubservicedb nagios-3.2.3]# make install
[root@pubservicedb nagios-3.2.3]# make install-init
/usr/bin/install -c -m 755 -d -o root -g root /etc/rc.d/init.d
/usr/bin/install -c -m 755 -o root -g root daemon-init /etc/rc.d/init.d/nagios*** Init script installed ***[root@pubservicedb nagios-3.2.3]# make install-config
/usr/bin/install -c -m 775 -o nagios -g nagios -d /usr/local/nagios/etc
/usr/bin/install -c -m 775 -o nagios -g nagios -d /usr/local/nagios/etc/objects
/usr/bin/install -c -b -m 664 -o nagios -g nagios sample-config/nagios.cfg /usr/local/nagios/etc/nagios.cfg
/usr/bin/install -c -b -m 664 -o nagios -g nagios sample-config/cgi.cfg /usr/local/nagios/etc/cgi.cfg
/usr/bin/install -c -b -m 660 -o nagios -g nagios sample-config/resource.cfg /usr/local/nagios/etc/resource.cfg
/usr/bin/install -c -b -m 664 -o nagios -g nagios sample-config/template-object/templates.cfg /usr/local/nagios/etc/objects/templates.cfg
/usr/bin/install -c -b -m 664 -o nagios -g nagios sample-config/template-object/commands.cfg /usr/local/nagios/etc/objects/commands.cfg
/usr/bin/install -c -b -m 664 -o nagios -g nagios sample-config/template-object/contacts.cfg /usr/local/nagios/etc/objects/contacts.cfg
/usr/bin/install -c -b -m 664 -o nagios -g nagios sample-config/template-object/timeperiods.cfg /usr/local/nagios/etc/objects/timeperiods.cfg
/usr/bin/install -c -b -m 664 -o nagios -g nagios sample-config/template-object/localhost.cfg /usr/local/nagios/etc/objects/localhost.cfg
/usr/bin/install -c -b -m 664 -o nagios -g nagios sample-config/template-object/windows.cfg /usr/local/nagios/etc/objects/windows.cfg
/usr/bin/install -c -b -m 664 -o nagios -g nagios sample-config/template-object/printer.cfg /usr/local/nagios/etc/objects/printer.cfg
/usr/bin/install -c -b -m 664 -o nagios -g nagios sample-config/template-object/switch.cfg /usr/local/nagios/etc/objects/switch.cfg*** Config files installed ***
Remember, these are *SAMPLE* config files. You’ll need to read
the documentation for more information on how to actually define
services, hosts, etc. to fit your particular needs.[root@pubservicedb nagios-3.2.3]# make install-commandmode
/usr/bin/install -c -m 775 -o nagios -g nagcmd -d /usr/local/nagios/var/rw
chmod g+s /usr/local/nagios/var/rw*** External command directory configured ***
[root@pubservicedb nagios-3.2.3]#
- 客户化配置，将 contacts.cfg 配置文件中的 Email 信息修改为系统管理员的 Email 地址
[root@pubservicedb nagios-plugins-1.4.15]# vi /usr/local/nagios/etc/objects/contacts.cfg - 配置 Web 接口
[root@pubservicedb nagios-3.2.3]# make install-webconf
/usr/bin/install -c -m 644 sample-config/httpd.conf /usr/local/apache/conf/conf.d//nagios.conf*** Nagios/Apache conf file installed ***[root@pubservicedb nagios-3.2.3]# /usr/local/apache/bin/htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin
New password:
Re-type new password:
Adding password for user nagiosadmin - 重启 httpd 服务
[root@pubservicedb nagios-3.2.3]# /usr/local/apache/bin/apachectl -k restart
httpd: Could not reliably determine the server’s fully qualified domain name, using 10.10.6.201 for ServerName
[root@pubservicedb nagios-3.2.3]# - 编译并安装 Nagios 插件源代码包
[root@pubservicedb nagios]# tar -zxf nagios-plugins-1.4.15.tar.gz
[root@pubservicedb nagios]# cd nagios-plugins-1.4.15
[root@pubservicedb nagios-plugins-1.4.15]# ./configure –with-nagios-user=nagios –with-nagios-group=nagios
[root@pubservicedb nagios-plugins-1.4.15]# make
[root@pubservicedb nagios-plugins-1.4.15]# make install - 配置 Nagios 服务
[root@pubservicedb nagios-plugins-1.4.15]# chkconfig –add nagios
[root@pubservicedb nagios-plugins-1.4.15]# chkconfig nagios on - 验证 Nagios 示例配置文件
[root@pubservicedb nagios-plugins-1.4.15]# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfgNagios Core 3.2.3
Copyright (c) 2009-2010 Nagios Core Development Team and Community Contributors
Copyright (c) 1999-2009 Ethan Galstad
Last Modified: 10-03-2010
License: GPLWebsite: http://www.nagios.org
Reading configuration data…
Read main config file okay…
Processing object config file ‘/usr/local/nagios/etc/objects/commands.cfg’…
Processing object config file ‘/usr/local/nagios/etc/objects/contacts.cfg’…
Processing object config file ‘/usr/local/nagios/etc/objects/timeperiods.cfg’…
Processing object config file ‘/usr/local/nagios/etc/objects/templates.cfg’…
Processing object config file ‘/usr/local/nagios/etc/objects/localhost.cfg’…
Read object config files okay…Running pre-flight check on configuration data…
Checking services…
Checked 8 services.
Checking hosts…
Checked 1 hosts.
Checking host groups…
Checked 1 host groups.
Checking service groups…
Checked 0 service groups.
Checking contacts…
Checked 1 contacts.
Checking contact groups…
Checked 1 contact groups.
Checking service escalations…
Checked 0 service escalations.
Checking service dependencies…
Checked 0 service dependencies.
Checking host escalations…
Checked 0 host escalations.
Checking host dependencies…
Checked 0 host dependencies.
Checking commands…
Checked 24 commands.
Checking time periods…
Checked 5 time periods.
Checking for circular paths between hosts…
Checking for circular host and service dependencies…
Checking global event handlers…
Checking obsessive compulsive processor commands…
Checking misc settings…Total Warnings: 0
Total Errors: 0Things look okay – No serious problems were detected during the pre-flight check
[root@pubservicedb nagios-plugins-1.4.15]# - 启动 Nagios 服务
[root@pubservicedb nagios-plugins-1.4.15]# service nagios start
Starting nagios:This account is currently not available.
done.
[root@pubservicedb nagios-plugins-1.4.15]# service nagios status
nagios (pid 20180) is running…
[root@pubservicedb nagios-plugins-1.4.15]# - 关于 SELinux 的相关设置
如果你所用的 Linux 系统开启了 SElinux 设置，那么这会使你在尝试访问 Nagios 的 CGI 时导致一个“内部服务错误”消息。你可以更改 /etc/sysconfig/selinux 文件，设置为 disabled 然后重启系统，通过彻底关闭该功能来避免上述问题。
当然，你也可以通过让 CGI 模块在 SELinux 模式下制定强制目标模式来解决该问题，方法如下：# chcon -R -t httpd_sys_content_t /usr/local/nagios/sbin/
# chcon -R -t httpd_sys_content_t /usr/local/nagios/share/ - 登录 Web 接口
在浏览器中浏览 http://host_ip/nagios/ 根据提示输入之前设置的用户名和口令即可访问 Nagios Web 界面。 - 大功告成！
总的来说，我安装 Nagios 的过程没有安装 Cacti 时那么曲折，但这并不意味着 Nagios 的安装步骤简单容易，而是因为很多东西，比如 libpng, libjpeg, libgd, Apache 等组件，我之前安装 Cacti 时都安装过了，如果有朋友在安装 Nagios 的过程中遇到了上述组件的安装困难的话，请参考这篇 文章 来解决。安装好 Nagios 后，我接下来的工作就是研究 Nagios 的基本配置以及相关监控插件的使用，我会在我的博客上及时更新我的学习过程的。请感兴趣的朋友常来我的博客看看！(＃^_^＃)
转载请注明：爱开源 » 在 RHEL 5.5 下配置 Nagios 3.2.3