day14 - centos7部署nagios（客户端，服务端的安装）（ob16）

其他 2021-03-27 00:54:38 阅读次数: 0

参考：https://www.cnblogs.com/benjamin77/p/8565798.html 《centos7部署nagios》
环境：centos7
服务端IP：192.168.26.136 （nagios监控服务器，Apache、Php、Nagios、nagios-plugins nginx）
客户端IP：192.168.26.137 （Lamp服务器，被监控的客户端服务器，nagios-plugins、nrpe）

一、服务端的安装

1.1 nagios监控工具原理图

在这里插入图片描述

Nagios 通过NRPE 来远端管理服务
1. Nagios 执行安装在它里面的check_nrpe 插件，并告诉check_nrpe 去检测哪些服务。
2. 通过SSL，check_nrpe 连接远端机子上的NRPE daemon
3. NRPE 运行本地的各种插件去检测本地的服务和状态(check_disk,..etc)
4. 最后，NRPE 把检测的结果传给主机端的check_nrpe，check_nrpe 再把结果送到Nagios状态队列中。
5. Nagios 依次读取队列中的信息，再把结果显示出来。

1.2 服务端安装nagios前的准备

1、解决perl编译问题

echo 'export LC_ALL=C'>> /etc/profile
source /etc/profile

2、关闭防火墙

systemctl stop firewalld

3、系统时间同步

ntpdate pool.ntp.org
echo '*/10 * * * * /usr/sbin/ntpdate pool.ntp.org >/dev/null 2>&1'>>/var/spool/root
或者
crontab -e 编辑，放上面定时同步语句到里面。

4、所需基础软件包

yum install gcc glibc glibc-common -y
yum install gd gd-devel -y
yum install httpd php php-gd -y
yum -y install httpd httpd-devel gcc glibc glibc-common gd gd-devel perl-devel perl-CPAN fcgi perl-FCGI perl-FCGI-ProcManager

此时他的版本为httpd-2.4.6 、php-5.4.16

1.3 创建nagios需要的用户及用户组

/usr/sbin/useradd -m nagios
/usr/sbin/useradd apache
/usr/sbin/useradd nagcmd

/usr/sbin/usermod -a -G nagcmd nagios
/usr/sbin/usermod -a -G nagcmd apache 

#检查
id -n -G nagios
id -n -G apache 
groups nagios
groups apache

1.4 安装nagios

#nagios-4.3.1.tar.gz  nagios-plugins-2.2.1.tar.gz  nrpe-3.1.0.tar.gz
cd /server/tools
wget https://assets.nagios.com/downloads/nagioscore/releases/nagios-4.3.1.tar.gz
wget https://nagios-plugins.org/download/nagios-plugins-2.2.1.tar.gz 
wget https://sourceforge.net/projects/nagios/files/nrpe-3.x/nrpe-3.1.0.tar.gz

tar -zxf nagios-4.3.1.tar.gz
cd nagios-4.3.1/
./configure --with-command-group=nagcmd

在这里插入图片描述

make all

在这里插入图片描述

#随后： 
make install
make install-init
make install-config
make install-commandmode
make install-webconf

cat /etc/httpd/conf.d/nagios.conf

在这里插入图片描述
在这里插入图片描述

1.5 创建nagios web监控界面登录的账号密码

# oldboy / 123456
htpasswd -c /usr/local/nagios/etc/htpasswd.users oldboy
[root@lb-136 nagios-4.3.1]# cat /usr/local/nagios/etc/htpasswd.users
oldboy:$apr1$78E5XW/o$KWeQOuJlOwuem.y9y4Df8/

这里的密码文件路径其实对应的是nagios.conf的这一段：
在这里插入图片描述

1.6 添加监控报警的接收email地址 （35行的地方）

sed -i 's#nagios@localhost#[email protected]#g' /usr/local/nagios/etc/objects/contacts.cfg

#参考 https://blog.51cto.com/13043516/2139030
yum -y install sendmail
yum -y install mailx
systemctl start sendmail
netstat -lnt | grep 25

在这里插入图片描述

1.7 配置启动Apache服务

主配置目录：
源码包位于手动指定目录下的conf/httpd.conf；yum的位于/etc/httd/conf/httpd.conf。

systemctl start httpd
systemctl enable httpd
apachectl graceful
lsof -i:80

1.8 安装nagios插件软件包

tar zxf nagios-plugins-2.2.1.tar.gz
cd nagios-plugins-2.2.1/
./configure --with-nagios-user=nagios --with-nagios-group=nagios --enable-perl-modules
make
make install

#查看生成的插件数量
ll /usr/local/nagios/libexec/ | wc -l

1.9 启动nagios

chkconfig nagios on
/etc/init.d/nagios start
#检查语法   Error 0  为正常
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
/etc/init.d/nagios checkconfig

在这里插入图片描述
访问：http://192.168.26.136/nagios/ （oldboy / 123456）
在这里插入图片描述

1.10 安装nrpe

yum -y install openssl-devel
tar -zxf nrpe-3.1.0.tar.gz
cd nrpe-3.1.0/
./configure
make all
make install-plugin
make install-daemon
make install-daemon-config

ls

nrpe版本3.1.0执行make install-daemon-config的时候会报错。目前暂认为是新版本没有该模块，忽略不管。。。
在这里插入图片描述
nagios服务端的安装到此。

二、客户端的安装

ntpdate time.windows.com
yum install perl-devel perl-CPAN -y

/usr/sbin/adduser nagios -M -s /sbin/nologin
#安装nagios-plugins
tar -zxf nagios-plugins-2.2.1.tar.gz
cd nagios-plugins-2.2.1/
./configure \
--with-nagios-user=nagios --with-nagios-group=nagios --enable-perl-modules
make
make install
#查看插件个数
ls /usr/local/nagios/libexec/ | wc -l
55

#安装nrpe
yum -y install openssl-devel 
tar zxf nrpe-3.1.0.tar.gz
cd nrpe-3.1.0/
./configure
make all
make install-plugin
make install-daemon
#生成 nrpe.cfg
make install-daemon-config
cp sample-config/nrpe.cfg /usr/local/nagios/etc/nrpe.cfg

yum install sysstat -y

2.1 测试启动nrpe （客户端）

#-d 后台启动 ，  -c 接配置文件
 /usr/local/nagios/bin/nrpe -d -c /usr/local/nagios/etc/nrpe.cfg 
[root@nagios-client nrpe-3.1.0]# echo "/usr/local/nagios/bin/nrpe -d -c /usr/local/nagios/etc/nrpe.cfg" >> /etc/rc.local
[root@nagios-client nrpe-3.1.0]# chmod +x /etc/rc.d/rc.local           # centos 7下需要这一步， 不然/etc/rc.local中的内容开机可能不执行
[root@nagios-client nrpe-3.1.0]# netstat -lnput|grep 5666
tcp        0      0 0.0.0.0:5666            0.0.0.0:*               LISTEN      28296/nrpe          
tcp6       0      0 :::5666                 :::*                    LISTEN      28296/nrpe 
[root@nagios-client nrpe-3.1.0]# /usr/local/nagios/libexec/check_nrpe -H localhost
NRPE v3.1.0-rc1

在这里插入图片描述

2.2 修改配置文件

允许服务端IP和本机访问，192.168.26.136是nagios服务端IP地址

cd /usr/local/nagios/etc/
vi nrpe.cfg

allowed_hosts=127.0.0.1,::1,192.168.26.136

在这里插入图片描述
注释304~308的文本
在这里插入图片描述
换成下面的内容。
注：command[ ]，中括号里面是方法名， w指warning ， c指critical 、超过这些数值就会显示警报。
/usr/local/nagios/libexec/check_users 这里就是nrpe里面那些监控插件/脚本

# my custom monitor items
command[check_users]=/usr/local/nagios/libexec/check_users -w 5 -c 10
command[check_load]=/usr/local/nagios/libexec/check_load -r -w .15,.10,.05 -c .30,.25,.20
# -p后面接的是磁盘分区
command[check_disk]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /
command[check_mem]=/usr/local/nagios/libexec/check_mem.pl -w 90% -c 95%
command[check_swap]=/usr/local/nagios/libexec/check_swap -w 20% -c 10%

注*:上面依次为对负载，内存，硬盘，虚拟内存，磁盘 IO的监控，这些都是本地的服务〔我们这里称之为被动监控)，由 nagios 服务器端通过nrpe插件定时去 client的nrpe服务定期获取信息。原理如下图:
在这里插入图片描述

创建check_mem.pl

vi /usr/local/nagios/libexec/check_mem.pl
chmod 755 /usr/local/nagios/libexec/check_mem.pl

#! /usr/bin/perl -w
#
# $Id: check_mem.pl 8 2008-08-23 08:59:52Z rhomann $
#
# check_mem v1.7 plugin for nagios
#
# uses the output of `free` to find the percentage of memory used
#
# Copyright Notice: GPL
#
# History:
# v1.8 Rouven Homann - [email protected]
# + added findbin patch from Duane Toler
# + added backward compatibility patch from Timour Ezeev
#
# v1.7 Ingo Lantschner - ingo AT boxbe DOT com
# + adapted for systems with no swap (avoiding divison through 0)
#
# v1.6 Cedric Temple - cedric DOT temple AT cedrictemple DOT info
# + add swap monitoring
#       + if warning and critical threshold are 0, exit with OK
#       + add a directive to exclude/include buffers
#
# v1.5 Rouven Homann - [email protected]
# + perfomance tweak with free -mt (just one sub process started instead of 7)
# + more code cleanup
#
# v1.4 Garrett Honeycutt - [email protected]
# + Fixed PerfData output to adhere to standards and show crit/warn values
#
# v1.3 Rouven Homann - [email protected]
#   + Memory installed, used and free displayed in verbose mode
# + Bit Code Cleanup
#
# v1.2 Rouven Homann - [email protected]
# + Bug fixed where verbose output was required (nrpe2)
#       + Bug fixed where perfomance data was not displayed at verbose output
# + FindBin Module used for the nagios plugin path of the utils.pm
#
# v1.1 Rouven Homann - [email protected]
#     + Status Support (-c, -w)
# + Syntax Help Informations (-h)
#       + Version Informations Output (-V)
# + Verbose Output (-v)
#       + Better Error Code Output (as described in plugin guideline)
#
# v1.0 Garrett Honeycutt - [email protected]
#   + Initial Release
#
use strict;
use FindBin;
FindBin::again();
use lib $FindBin::Bin;
use utils qw($TIMEOUT %ERRORS &print_revision &support);
use vars qw($PROGNAME $PROGVER);
use Getopt::Long;
use vars qw($opt_V $opt_h $verbose $opt_w $opt_c);

$PROGNAME = "check_mem";
$PROGVER = "1.8";

# add a directive to exclude buffers:
my $DONT_INCLUDE_BUFFERS = 0;

sub print_help ();
sub print_usage ();

Getopt::Long::Configure('bundling');
GetOptions ("V"   => \$opt_V, "version"    => \$opt_V,
  "h"   => \$opt_h, "help"       => \$opt_h,
        "v" => \$verbose, "verbose"  => \$verbose,
  "w=s" => \$opt_w, "warning=s"  => \$opt_w,
  "c=s" => \$opt_c, "critical=s" => \$opt_c);

if ($opt_V) {
    
    
  print_revision($PROGNAME,'$Revision: '.$PROGVER.' $');
  exit $ERRORS{
    
    'UNKNOWN'};
}

if ($opt_h) {
    
    
  print_help();
  exit $ERRORS{
    
    'UNKNOWN'};
}

print_usage() unless (($opt_c) && ($opt_w));

my ($mem_critical, $swap_critical);
my ($mem_warning, $swap_warning);
($mem_critical, $swap_critical) = ($1,$2) if ($opt_c =~ /([0-9]+)[%]?(?:,([0-9]+)[%]?)?/);
($mem_warning, $swap_warning)   = ($1,$2) if ($opt_w =~ /([0-9]+)[%]?(?:,([0-9]+)[%]?)?/);

# Check if swap params were supplied
$swap_critical ||= 100;
$swap_warning  ||= 100;

# print threshold in output message
my $mem_threshold_output = " (";
my $swap_threshold_output = " (";

if ( $mem_warning > 0 && $mem_critical > 0) {
    
    
  $mem_threshold_output .= "W> $mem_warning, C> $mem_critical";
}
elsif ( $mem_warning > 0 ) {
    
    
  $mem_threshold_output .= "W> $mem_warning";
}
elsif ( $mem_critical > 0 ) {
    
    
  $mem_threshold_output .= "C> $mem_critical";
}

if ( $swap_warning > 0 && $swap_critical > 0) {
    
    
  $swap_threshold_output .= "W> $swap_warning, C> $swap_critical";
}
elsif ( $swap_warning > 0 ) {
    
    
  $swap_threshold_output .= "W> $swap_warning";
}
elsif ( $swap_critical > 0 )  {
    
    
  $swap_threshold_output .= "C> $swap_critical";
}

$mem_threshold_output .= ")";
$swap_threshold_output .= ")";

my $verbose = $verbose;

my ($mem_percent, $mem_total, $mem_used, $swap_percent, $swap_total, $swap_used) = &sys_stats();
my $free_mem = $mem_total - $mem_used;
my $free_swap = $swap_total - $swap_used;

# set output message
my $output = "Memory Usage".$mem_threshold_output.": ". $mem_percent.'% <br>';
$output .= "Swap Usage".$swap_threshold_output.": ". $swap_percent.'%';

# set verbose output message
my $verbose_output = "Memory Usage:".$mem_threshold_output.": ". $mem_percent.'% '."- Total: $mem_total MB, used: $mem_used MB, free: $free_mem MB<br>";
$verbose_output .= "Swap Usage:".$swap_threshold_output.": ". $swap_percent.'% '."- Total: $swap_total MB, used: $swap_used MB, free: $free_swap MB<br>";

# set perfdata message
my $perfdata_output = "MemUsed=$mem_percent\%;$mem_warning;$mem_critical";
$perfdata_output .= " SwapUsed=$swap_percent\%;$swap_warning;$swap_critical";


# if threshold are 0, exit with OK
if ( $mem_warning == 0 ) {
    
     $mem_warning = 101 };
if ( $swap_warning == 0 ) {
    
     $swap_warning = 101 };
if ( $mem_critical == 0 ) {
    
     $mem_critical = 101 };
if ( $swap_critical == 0 ) {
    
     $swap_critical = 101 };


if ($mem_percent>$mem_critical || $swap_percent>$swap_critical) {
    
    
    if ($verbose) {
    
     print "<b>CRITICAL: ".$verbose_output."</b>|".$perfdata_output."\n";}
    else {
    
     print "<b>CRITICAL: ".$output."</b>|".$perfdata_output."\n";}
    exit $ERRORS{
    
    'CRITICAL'};
} elsif ($mem_percent>$mem_warning || $swap_percent>$swap_warning) {
    
    
    if ($verbose) {
    
     print "<b>WARNING: ".$verbose_output."</b>|".$perfdata_output."\n";}
    else {
    
     print "<b>WARNING: ".$output."</b>|".$perfdata_output."\n";}
    exit $ERRORS{
    
    'WARNING'};
} else {
    
    
    if ($verbose) {
    
     print "OK: ".$verbose_output."|".$perfdata_output."\n";}
    else {
    
     print "OK: ".$output."|".$perfdata_output."\n";}
    exit $ERRORS{
    
    'OK'};
}

sub sys_stats {
    
    
    my @memory = split(" ", `free -mt`);
    my $mem_total = $memory[7];
    my $mem_used;
    if ( $DONT_INCLUDE_BUFFERS) {
    
     $mem_used = $memory[15]; }
    else {
    
     $mem_used = $memory[8];}
    my $swap_total = $memory[18];
    my $swap_used = $memory[19];
    my $mem_percent = ($mem_used / $mem_total) * 100;
    my $swap_percent;
    if ($swap_total == 0) {
    
    
  $swap_percent = 0;
    } else {
    
    
  $swap_percent = ($swap_used / $swap_total) * 100;
    }
    return (sprintf("%.0f",$mem_percent),$mem_total,$mem_used, sprintf("%.0f",$swap_percent),$swap_total,$swap_used);
}

sub print_usage () {
    
    
    print "Usage: $PROGNAME -w <warn> -c <crit> [-v] [-h]\n";
    exit $ERRORS{
    
    'UNKNOWN'} unless ($opt_h);
}

sub print_help () {
    
    
    print_revision($PROGNAME,'$Revision: '.$PROGVER.' $');
    print "Copyright (c) 2005 Garrett Honeycutt/Rouven Homann/Cedric Temple\n";
    print "\n";
    print_usage();
    print "\n";
    print "-w <MemoryWarn>,<SwapWarn> = Memory and Swap usage to activate a warning message (eg: -w 90,25 ) .\n";
    print "-c <MemoryCrit>,<SwapCrit> = Memory and Swap usage to activate a critical message (eg: -c 95,50 ).\n";
    print "-v = Verbose Output.\n";
    print "-h = This screen.\n\n";
    support();
}

重启nrpe 并本地测试

# 方法一
[root@client1 etc]# killall nrpe               
[root@client1 etc]# /usr/local/nagios/bin/nrpe -d -c /usr/local/nagios/etc/nrpe.cfg
# 方法二
[root@client1 etc]# kill -HUP `ps -ef|grep nrpe|awk 'NR==1{print $2}'`

netstat -lnt | grep 5666

在本机执行两个命令看下效果
/usr/local/nagios/libexec/check_nrpe -H localhost -c check_mem

/usr/local/nagios/libexec/check_nrpe -H localhost -c check_disk

在这里插入图片描述
小tips：
ps -ef 可以看出最后有 nagios的启动语句，下次killall nagios ，killall nrpe ，pkill nrpe 在启动程序的话，直接复制粘贴即可

[root@memcache137 etc]# ps -ef | grep nagios
nagios    79948      1  0 11:07 ?        00:00:00 /usr/local/nagios/bin/nrpe -d -c /usr/local/nagios/etc/nrpe.cfg

END
这客户端CV参考了些许文章，搞得有丶缝合了

猜你喜欢

转载自blog.csdn.net/Nightwish5/article/details/114262388
今日推荐
火速冲上 GitHub 热榜 —— 开源编程语言、框架哪有这么可爱？
北京人形机器人创新中心发布全球首个纯电驱拟人奔跑的全尺寸人形机器人“天工”
LFOSSA 源来如此公开课 | 掌握云原生未来：CNCF 认证全面攻略与备考秘籍
国产云输入法——仅华为无云端数据上传安全问题
开源日报 | 工业开源项目OGG 1.0；姐姐，你要和我一起配置火狐吗；苹果AI遥遥落后？Fedora 40
开放签电子签章：停止新增，优化体验，前进更进（五一假期前工作）
周排行
Metasploit文件目录与入侵基本概念
跨域(CORS)请求问题[No 'Access-Control-Allow-Origin' header is present on the requested resource]常见解决方案
CodeIgniter 源码解读之 CodeIgniter.php（二）
SAS入门之（四）改变数据类型
初识元组
[数学建模]数学建模算法和模型（B站视频）（二）
Nginx 服务器源码安装配置流程
C#实现语音视频录制 【基于MCapture + MFile】
开发进度4
下载安装vue的方法网址
每日归档
更多
2024-04-28(0)
2024-04-27(56)
2024-04-26(39)
2024-04-25(22)
2024-04-24(36)
2024-04-23(26)
2024-04-22(39)
2024-04-21(0)
2024-04-20(6)
2024-04-19(5)

代码天地 © 2018 codetd.com

境外服务器   最新电视剧2022