监控利器nagios

一、先安装apahce+php这里不做介绍了。

二、安装nagios
1、建立用户

# useradd -s /sbin/nologins nagios
# mkdir /usr/local/nagios
# chown -R  nagios.nagios /usr/local/nagios/

# tar xf nagios-3.4.1.tar.gz
# cd nagios
# ./configure --prefix=/usr/local/nagios/
# make all
# make install
# make install-init
# make install-commandmode
# make install-config

# chkconfig --add nagios
# chkconfig nagios on
# chkconfig --list nagios

2、安装插件

# tar xf nagios-plugins-1.4.16.tar.gz
# cd nagios-plugins-1.4.16
# ./configure --prefix=/usr/local/nagios/
# make && make install

三、修改配置
1、修改apache的配置文件

# vim /usr/local/apache2/conf/httpd.conf
User nagios
Group nagios

最后添加如下内容，设置成需要输入密码才能登陆
ScriptAlias /nagios/cgi-bin "/usr/local/nagios/sbin"
<Directory "/usr/local/nagios/sbin">
        AuthType Basic
        Options ExecCGI
        AllowOverride   None
        Order allow,deny
        Allow from all
        AuthName "Nagions Access"
        AuthUserFile /usr/local/nagios/etc/htpasswd
        Require valid-user
</Directory>

Alias /nagios   "/usr/local/nagios/share"
<Directory "/usr/local/nagios/share">
        AuthType Basic
        Options None
        AllowOverride None
        Order allow,deny
        Allow from all
        AuthName "Nagios Access"
        AuthUserFile /usr/local/nagios/etc/htpasswd
        Require valid-user
</Directory>

建立登陆的用户名密码
# /usr/local/apache2/bin/htpasswd -c /usr/local/nagios/etc/htpasswd admin
启动httpd以后访问输入用户名密码就可以看到Nagios了

2、配置nagios

在/usr/local/nagios/etc下建立2个文件：
（1）hosts.cfg定义主机的文件
define host{
    use    linux-server        //引用linux-server的属性信息，linux-server在templates.cfg中定义
    host_name    localhost    //主机名
    alias    host1            //别名
    address    192.168.163.143        //ip地址
}
define host{
    use    linux-server
    host_name    host-142
    alias    host2
    address    192.168.163.142
}

（2）services.cfg 定义主机服务的文件
define service{
    use    local-service        //引用local-service的属性信息，在template.cfg中定义
    host_name    host-142    //监控那个主机，host-142在hosts.cfg中定义
    service_description    ssh    //对监控内容的描述
    check_command    check_ping    //指定监控的命令，check_ping在commands.cfg中定义
}
define service{
    use    local-service
    host_name    localhost
    service_description    Ping
    check_command    check_ping
}

3、添加admin用户信息，这里的admin用户是之前htpasswd生成的用户：

default_user_name=admin
authorized_for_system_information=nagiosadmin,admin
authorized_for_configuration_information=nagiosadmin,admin
authorized_for_system_commands=nagiosadmin,admin
authorized_for_all_services=nagiosadmin,admin
authorized_for_all_hosts=nagiosadmin,admin
authorized_for_all_service_commands=nagiosadmin,admin
authorized_for_all_host_commands=nagiosadmin,admin

4、修改nagios.cfg文件，添加文件路径信息：

cfg_file=/usr/local/nagios/etc/hosts.cfg
cfg_file=/usr/local/nagios/etc/services.cfg
cfg_file=/usr/local/nagios/etc/objects/commands.cfg
cfg_file=/usr/local/nagios/etc/objects/contacts.cfg
cfg_file=/usr/local/nagios/etc/objects/timeperiods.cfg
cfg_file=/usr/local/nagios/etc/objects/templates.cfg

5、检查是否有问题
# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
如下正常，如果有问题的话nagios会提示那有错误非常明确的

#service nagios restart
启动nagios后访问下:

1、查看主机的信息：

2、查看服务的信息