用 KVM 搭建web集群实验笔记 - nagios 安装配置

来源：互联网发布：万网域名不备案能用吗编辑：程序博客网时间：2024/06/06 04:24

Nagios 是一个开源的监控工具，能够监控 windows、Linux等系统的主机状态信息，以及交换机、路由器等网络设备。Nagios有一个主程序(Nagios)、一个插件程序(Nagios-plugins)和一些可选的附加程序（NPRE、NSClient++、NSCA 和NDAOUtils）等组成。

服务器端：安装nagios和nagios-plugins插件(必选)，NDOUtils（可选），存储配置信息和产生的数据。

客服端：linux/unix 安装NRPE组件（被动方式），windows安装NSClient++组件。

服务器 nagios 192.168.122.34

客户端 nfssvr 192.168.122.41

一、服务器安装

在nagios上执行操作

1. 配置对时，192.168.122.1为服务器

echo '#time sync by oliver on 2016-09-30 ' >> /var/spool/cron/rootecho '*/5 * * * * /usr/sbin/ntpdate 192.168.122.1 > /dev/null 2>&1' >> /var/spool/cron/rootcrontab -l

2. 安装软件

yum install -y gcc glibc glibc-common yum install -y gd gd-develyum install -y mysql-server mysql-develyum install -y httpd php php-gd

3. 创建用户组和用户

/usr/sbin/useradd nagios -g nagios /usr/sbin/useradd apache -g nagios -M -s /sbin/nologin/usr/sbin/groupadd nagcmd/usr/sbin/usermod -a -G nagcmd nagios/usr/sbin/usermod -a -G nagcmd apache

4. 启动httpd

vi /etc/httpd/conf/httpd.conf

设置

ServerName 192.168.122.34:80

service httpd start 或者 /etc/init.d/httpd start

5. 下载nagios的软件包

check_iostatcheck_memory.plClass-Accessor-0.31.tar.gzConfig-Tiny-2.12.tar.gzlibart_lgpl-2.3.17.tar.gzMath-Calc-Units-1.07.tar.gznagios-3.5.1.tar.gzNagios-Plugin-0.34.tar.gznagios-plugins-1.4.16.tar.gznrpe-2.12.tar.gzParams-Validate-0.91.tar.gzpnp-0.4.14.tar.gzRegexp-Common-2010010201.tar.gzrrdtool-1.2.14.tar.gz

在网上可以搜到。可以进入http://www.filewatcher.com/ 这个网站搜。

6. 编译nagios-3.5.1.tar.gz

tar -xvf nagios-3.5.1.tar.gzcd nagios./configure --with-command-group=nagcmdmake allmake installmake install-initmake install-configmake install-commandmodemake install-webconfhtpasswd -bc /usr/local/nagios/etc/htpasswd.users nagios 123456service httpd restart

配置邮件（这一步没有实际测试）

sed -i 's#nagios@localhost#em21@qq.com#g' /usr/local/nagios/etc/objects/contacts.cfg

7. 编译nagios-plugins-1.4.16.tar.gz

tar xvf nagios-plugins-1.4.16.tar.gzcd nagios-plugins-1.4.16./configure --with-nagios-user=nagios --with-nagios-group=nagios --enable-perl-modules --with-mysqlmakemake installcd ..

确认configure的输出，然后在执行make 和 make install

config.status: creating po/Makefile            --with-apt-get-command:               --with-ping6-command: /bin/ping6 -n -U -w %d -c %d %s               --with-ping-command: /bin/ping -n -U -w %d -c %d %s                       --with-ipv6: yes                      --with-mysql: /usr/bin/mysql_config                    --with-openssl: yes                     --with-gnutls: no               --enable-extra-opts: no                       --with-perl: /usr/bin/perl             --enable-perl-modules: yes                     --with-cgiurl: /nagios/cgi-bin               --with-trusted-path: /bin:/sbin:/usr/bin:/usr/sbin                   --enable-libtap: no

8. 编译nrpe-2.12.tar.gz

tar xvf nrpe-2.12.tar.gzcd nrpe-2.12./configuremake allmake install-pluginmake install-daemonmake install-daemon-configls /usr/local/nagios/libexec/check_nrpe

9.启动httpd和nagios

chkconfig httpd onchkconfig nagios on

二、客服端安装配置

在nfssvr上操作

1.安装基本软件、增加用户

yum install -y gcc glibc glibc-commonyum install -y mysql-server mysql-develyum install -y perl-devel perl-CPAN openssl-develuseradd nagios -M -s /sbin/nologin

2.编译nagios-plugins-1.4.16.tar.gz

tar -xvf nagios-plugins-1.4.16.tar.gzcd nagios-plugins-1.4.16./configure --with-nagios=nagios --with-nagios-group=nagios --enable-perl-modules --with-mysqlmakemake installcd ..

检查插件个数

[root@nfssvr _soft]# ls /usr/local/nagios/libexec/ |wc -l58[root@nfssvr _soft]#

3.安装插件

#---------------tar xvf nrpe-2.12.tar.gzcd nrpe-2.12./configuremake allmake install-pluginmake install-daemonmake install-daemon-configcd ..#-------------------------tar xvf Params-Validate-0.91.tar.gzcd Params-Validate-0.91perl Makefile.PLmakemake installcd ..#----------------------------------tar xvf Class-Accessor-0.31.tar.gzcd Class-Accessor-0.31 perl Makefile.PLmakemake installcd ..#---------------------------------tar xvf Config-Tiny-2.12.tar.gzcd Config-Tiny-2.12 perl Makefile.PLmakemake installcd ..#-------------------------------tar xvf Math-Calc-Units-1.07.tar.gzcd Math-Calc-Units-1.07perl Makefile.PLmakemake installcd ..#-------------------------------tar xvf Regexp-Common-2010010201.tar.gzcd Regexp-Common-2010010201perl Makefile.PLmakemake installcd ..#-------------------------------tar xvf Nagios-Plugin-0.34.tar.gzcd Nagios-Plugin-0.34perl Makefile.PLmakemake installcd ..yum install -y sysstatyum install -y dos2unixcp /_soft/check_memory.pl /usr/local/nagios/libexeccp /_soft/check_iostat /usr/local/nagios/libexecchmod 755 check_memory.plchmod 755 check_iostatdos2unix /usr/local/nagios/libexec/check_memory.pldos2unix /usr/local/nagios/libexec/check_iostat

4.配置nrpe服务

[root@nfssvr etc]# cd /usr/local/nagios/etc[root@nfssvr etc]# sed -n '79'p nrpe.cfgallowed_hosts=127.0.0.1[root@nfssvr etc]# sed -i 's#allowed_hosts=127.0.0.1#allowed_hosts=127.0.0.1,192.168.122.34#g' nrpe.cfg[root@nfssvr etc]# sed -n '79'p nrpe.cfgallowed_hosts=127.0.0.1,192.168.122.34

vi nrpe.cfg
199~233行替换为

command[check_load]=/usr/local/nagios/libexec/check_load -w 15,10,5 -c 30,25,20command[check_hda1]=/usr/local/nagios/libexec/check_memory.pl -w 10% -c 3%command[check_hda1]=/usr/local/nagios/libexec/check_disk -w 15% -c 7% -p /command[check_hda1]=/usr/local/nagios/libexec/check_swap -w 20% -c 10%  command[check_hda1]=/usr/local/nagios/libexec/check_iostat -w 6 -c 10

启动nrep服务并检查

/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -dnetstat -lntup|grep nrpeps -ef|grep nrpe |grep -v grep

三、服务器端配置

1.编辑 /usr/local/nagios/etc/nagios.cfg

在34行下增加
cfg_file=/usr/local/nagios/etc/objects/hosts.cfg
cfg_file=/usr/local/nagios/etc/objects/services.cfg
cfg_dir=/usr/local/nagios/etc/objects/services

注释
#cfg_file=/usr/local/nagios/etc/objects/localhost.cfg

2. 在ojbects 下将services目录

3. 配置/usr/local/nagios/etc/objects/hosts.cfg

cd /usr/local/nagios/etc/objectshead -51 localhost.cfg > hosts.cfgchown nagios.nagios /usr/local/nagios/etc/objects/hosts.cfg

增加host

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               nfssvr        alias                   nfssvr        address                 192.168.122.41        }

在组内增加一个成员

define hostgroup{        hostgroup_name  linux-servers ; The name of the hostgroup        alias           Linux Servers ; Long name of the group        members         nfssvr     ; Comma separated list of hosts that belong to this group        }

4. 配置/usr/local/nagios/etc/objects/services.cfg

touch services.cfg
chown nagios.nagios services.cfg

增加以下内容

define service {    use                       generic-service    host_name                 nfssvr    service_description       Disk Partition    check_command             check_nrpe!check_disk}define service {    use                       generic-service    host_name                 nfssvr    service_description       Swap Useage    check_command             check_nrpe!check_swap}define service {    use                       generic-service    host_name                 nfssvr    service_description       MEM Useage    check_command             check_nrpe!check_mem}define service {    use                       generic-service    host_name                 nfssvr    service_description       Current Load    check_command             check_nrpe!check_load}define service {    use                       generic-service    host_name                 nfssvr    service_description       Disk Iostat    check_command             check_nrpe!check_iostat!5!11}define service {    use                       generic-service    host_name                 nfssvr    service_description       PING    check_command             check_ping!100.0,20%!500.0,60%}

5. 配置/usr/local/nagios/etc/objects/commands.cfg

增加以下内容

define command{       command_name    check_nrpe       command_line    $USER1$/check_nrpe -h $HOSTADDRESS$ -c $ARG1$       }

6.建目录

mkdir -p /usr/local/nagios/etc/objects/serviceschown -R nagios.nagios services

7. 修改 /usr/local/nagios/etc/cgi.cfg

将授权用户改为nagios，否则用nagios登录，不能查看相应的信息。

grep ^"authorized_for" cgi.cfgsed -i 's#nagiosadmin#nagios#g' cgi.cfg

8. 验证

/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

验证无误后重新启动nagios服务

servie nagios restart

9. 浏览器登录

四、问题诊断

如出现问题，可用以下方法诊断。

1. 检查客服端的nrpe是否能连接上，连接上会打印出版本号

在服务器端操作

[root@nagios libexec]# pwd/usr/local/nagios/libexec[root@nagios libexec]# ./check_nrpe -H 192.168.122.41Connection refused by host[root@nagios libexec]# ./check_nrpe -H 192.168.122.41NRPE v2.12[root@nagios libexec]#

2. 检查某个service是否正常

在服务器端操作

[root@nagios libexec]# ./check_nrpe -H 192.168.122.41 -c check_memOK - 77.9% (391240 kB) free.|TOTAL=502096KB;;;; USED=110856KB;;;; FREE=391240KB;;;; CACHES=54296KB;;;;[root@nagios libexec]# ./check_nrpe -H 192.168.122.41 -c check_diskDISK OK - free space: / 8937 MB (90% inode=95%);| /=990MB;8895;9732;0;10465[root@nagios libexec]#

如无返回可以倒客服端上执行相应的命令，及在客户端上执行如下命令（在/usr/local/nagios/etc/nrpe.cfg）

[root@nfssvr etc]# /usr/local/nagios/libexec/check_disk -w 15% -c 7% -p /DISK OK - free space: / 8937 MB (90% inode=95%);| /=990MB;8895;9732;0;10465[root@nfssvr etc]#

0 0