Centos-7下Nagios的安裝及配置（完整版）
簡介
Nagios 是一款自動化運維工具，能夠協助運維人員監控服務器的運行情況，而且擁有報警功能。本文章將介紹其安裝方法和詳細的配置方法。php
nagios 監控服務應用指南
本地資源：負載，CPU，磁盤，內存。IO，RAID，溫度，passwd文件變化，本地全部文件指紋識別
網絡服務：端口，URL，丟包，進程，網絡流量
其餘設備：交換機，打印機，windows等。
業務數據：用戶登陸失敗次數，用戶登陸網站次數，輸入驗證碼失敗的次數，某個API接口流量併發，電商網站訂單，支付交易的數量htmlnagios成員：主程序nagios，插件nagios-plugins，和一些可選的客戶端nrpe，NSClient++,NSCA和NDOUtilsnode
- NRPE--半被動模式
存放位置：安裝在客戶端
NRPE做用：在客戶端執行相關的腳本插件來獲取數據，實現對客戶端主機資源的監控。
存在形式：守護進程(agent)模式，開啓的端口5666- NSClient++：半被動模式，至關於linux系統的nrpe
- NDOUtils（不推薦用）
存在位置：服務端
做用：用於將nagios的配置信息和各event產生的數據存入數據庫中，以實現對這些數據的檢索和處理。- NSCA：純被動模式--->用在分佈式監控環境中
位置：NSCA須要同時安裝在nagios的服務器端和客戶端
軟件版本
nagios版本：4.3.1
nagios-plugins版本：2.2.1
nrpe版本：3.1.0
實現環境
nagios運行在LAMP環境下（若是尚未安裝LAMP環境，能夠參考下個人安裝LNMP文章，由於我已經編譯安裝了php和Mysql，本文直接採起yum 方式安裝apache，固然也能夠採起編譯方式安裝apache。看我的喜愛和公司需求）mysql
Centos版本：CentOS Linux release 7.3.1611 (Core) 64位
Apache版本：Apache/2.4.6
Nginx版本: nginx 1.12.0
Mysql版本：mysql 5.7.18
PHP版本：php 7.1.4
下載nagios軟件及插件包
下載慢的話能夠去個人網盤下載linux
[root@nagios ~]# cd /software/ [root@nagios software]# wget https://assets.nagios.com/downloads/nagioscore/releases/nagios-4.3.1.tar.gz [root@nagios software]# wget https://nagios-plugins.org/download/nagios-plugins-2.2.1.tar.gz [root@nagios software]# wget https://sourceforge.net/projects/nagios/files/nrpe-3.x/nrpe-3.1.0.tar.gz [root@nagios software]# ll -rw-r--r-- 1 root root 11095797 4月 21 15:57 nagios-4.3.1.tar.gz -rw-r--r-- 1 root root 2728818 4月 20 00:04 nagios-plugins-2.2.1.tar.gz -rw-r--r-- 1 root root 501028 4月 17 22:36 nrpe-3.1.0.tar.gz
安裝nagios-server服務端
安裝依賴包
[root@nagios software]# yum -y install httpd httpd-devel gcc glibc glibc-common gd gd-devel perl-devel perl-CPAN fcgi perl-FCGI perl-FCGI-ProcManager
解壓nagios源碼包
[root@nagios software]# tar zxvf nagios-4.3.1.tar.gz
進入解壓後的目錄
[root@nagios software]# cd nagios-4.3.1/
建立ngaios用戶和組（把nginx啓動用戶www加入到nagios相關組）
[root@nagios nagios-4.3.1]# useradd nagios -s /sbin/nologin [root@nagios nagios-4.3.1]# id www [root@nagios nagios-4.3.1]# groupadd nagcmd [root@nagios nagios-4.3.1]# usermod -a -G nagcmd nagios [root@nagios nagios-4.3.1]# usermod -a -G nagcmd www [root@nagios nagios-4.3.1]# id -n -G nagios [root@nagios nagios-4.3.1]# id -n -G www
配置nagios
[root@client1 nagios-4.3.1]# ./configure --with-command-group=nagcmd
編譯和安裝
[root@nagios nagios-4.3.1]# make all [root@nagios nagios-4.3.1]# make install-init [root@nagios nagios-4.3.1]# make install-commandmode [root@nagios nagios-4.3.1]# make install-config [root@nagios nagios-4.3.1]# make install [root@nagios nagios-4.3.1]# cp -R contrib/eventhandlers/ /usr/local/nagios/libexec/ [root@nagios nagios-4.3.1]# chown -R nagios:nagios /usr/local/nagios/libexec/eventhandlers [root@nagios nagios-4.3.1]# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
生成apache配置文件
[root@nagios nagios-4.3.1]# make install-webconf
/usr/bin/install -c -m 644 sample-config/httpd.conf /etc/httpd/conf.d/nagios.conf
if [ 0 -eq 1 ]; then \
ln -s /etc/httpd/conf.d/nagios.conf /etc/apache2/sites-enabled/nagios.conf; \
fi
*** Nagios/Apache conf file installed ***
生成nagios web界面的驗證信息
[root@nagios nagios-4.3.1]# htpasswd -c /usr/local/nagios/etc/htpasswd.users nagios New password: ==> 輸入密碼，這裏我輸入的密碼是nagios，記住這個密碼 Re-type new password: ==> 確認密碼 Adding password for user nagios
修改apache配置文件
vi /etc/httpd/conf/httpd.confios
Listen 80 ===> 修改成 Listen 8080 User apache ===> 修改成 User www Group apache ===> 修改成 Group www DirectoryIndex index.html ===> 修改成 DirectoryIndex index.php index.html AddType application/x-gzip .gz .tgz ===> 下面添加一行內容 AddHandler application/x-httpd-php .php # LoadModule foo_module modules/mod_foo.so ===> 下面添加一行內容 LoadModule php7_module modules/libphp7.so
apache配置文件參考
[root@nagios httpd]# grep -v '^$' /etc/httpd/conf/httpd.conf|grep -v '#'
ServerRoot "/etc/httpd"
Listen 8080
LoadModule php7_module modules/libphp7.so
Include conf.modules.d/*.conf
User www
Group www
ServerAdmin root@localhost
<Directory />
AllowOverride none
Require all denied
</Directory>
DocumentRoot "/var/www/html"
<Directory "/var/www">
AllowOverride None
Require all granted
</Directory>
<Directory "/var/www/html">
Options Indexes FollowSymLinks
AllowOverride None
Require all granted
</Directory>
<IfModule dir_module>
DirectoryIndex index.php index.html
</IfModule>
<Files ".ht*">
Require all denied
</Files>
ErrorLog "logs/error_log"
LogLevel warn
<IfModule log_config_module>
LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined
LogFormat "%h %l %u %t \"%r\" %>s %b" common
<IfModule logio_module>
LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\" %I %O" combinedio
</IfModule>
CustomLog "logs/access_log" combined
</IfModule>
<IfModule alias_module>
ScriptAlias /cgi-bin/ "/var/www/cgi-bin/"
</IfModule>
<Directory "/var/www/cgi-bin">
AllowOverride None
Options None
Require all granted
</Directory>
<IfModule mime_module>
TypesConfig /etc/mime.types
AddType application/x-compress .Z
AddType application/x-gzip .gz .tgz
AddHandler application/x-httpd-php .php
AddType text/html .shtml
AddOutputFilter INCLUDES .shtml
</IfModule>
AddDefaultCharset UTF-8
<IfModule mime_magic_module>
MIMEMagicFile conf/magic
</IfModule>
EnableSendfile on
IncludeOptional conf.d/*.conf
從新編譯一下php，使其直接apache（也就是編譯參數加上--with-apxs2）
[root@nagios nagios-4.3.1]# cd /software/php-7.1.4/ [root@nagios php-7.1.4]# ./configure --prefix=/usr/local/php --enable-fpm --with-fpm-user=nginx --with-fpm-group=nginx --with-mysqli --with-zlib --with-curl --with-gd --with-jpeg-dir --with-png-dir --with-freetype-dir --with-openssl --enable-mbstring --enable-xml --enable-session --enable-ftp --enable-pdo -enable-tokenizer --enable-zip --with-apxs2 [root@nagios php-7.1.4]# make && make install [root@nagios php-7.1.4]# cd /etc/httpd/ [root@nagios httpd]# ll /etc/httpd/modules/libphp7.so -rwxr-xr-x 1 root root 38908880 4月 24 10:34 /etc/httpd/modules/libphp7.so ===> 能夠看到這個模塊已經生成
啓動apache
[root@nagios httpd]# systemctl start httpd [root@nagios httpd]# systemctl enable httpd
啓動nagios
chkconfig nagios on /etc/init.d/nagios start
在瀏覽器輸入ip:8080/nagios測試nagios-web頁面是否能夠打開
安裝nagios-plugins插件
解壓nagios-plugins源碼包
[root@nagios httpd]# cd /software/ [root@nagios software]# tar zxvf nagios-plugins-2.2.1.tar.gz
進入解壓後的目錄進行配置
[root@nagios software]# cd nagios-plugins-2.2.1/ [root@nagios nagios-plugins-2.2.1]# ./configure --with-nagios-user=nagios --with-nagios-group=nagcmd --enable-perl-modules
編譯及安裝
[root@nagios nagios-plugins-2.2.1]# make && make install
安裝nrpe
解壓nrpe源碼包
[root@nagios nagios-plugins-2.2.1]# cd /software/ [root@nagios software]# tar zxvf nrpe-3.1.0.tar.gz
進去解壓後的目錄進行配置
[root@nagios software]# cd nrpe-3.1.0/ [root@nagios nrpe-3.1.0]# ./configure
編譯及安裝
[root@nagios nrpe-3.1.0]# make all [root@nagios nrpe-3.1.0]# make install-plugin [root@nagios nrpe-3.1.0]# make install-daemon [root@nagios nrpe-3.1.0]# make install-daemon-config [root@nagios nrpe-3.1.0]# cp sample-config/nrpe.cfg /usr/local/nagios/etc/nrpe.cfg
安裝完成後，查看下libexec下面是否有插件
[root@nagios nrpe-3.1.0]# ls /usr/local/nagios/libexec/ check_apt check_flexlm check_log check_ntp_peer check_smtp disable_active_service_checks check_breeze check_fping check_mailq check_ntp_time check_spop disable_notifications check_by_ssh check_ftp check_mrtg check_nwstat check_ssh distributed-monitoring check_clamd check_http check_mrtgtraf check_oracle check_ssmtp enable_active_service_checks check_cluster check_icmp check_mysql check_overcr check_swap enable_notifications check_dhcp check_ide_smart check_mysql_query check_ping check_tcp eventhandlers check_dig check_ifoperstatus check_nagios check_pop check_time negate check_disk check_ifstatus check_nntp check_procs check_udp redundancy-scenario1 check_disk_smb check_imap check_nntps check_real check_ups submit_check_result check_dns check_ircd check_nrpe check_rpc check_uptime urlize check_dummy check_jabber check_nt check_sensors check_users utils.pm check_file_age check_load check_ntp check_simap check_wave utils.sh
啓動nrpe，並測試服務端本地是否能夠連通
[root@nagios nrpe-3.1.0]# /usr/local/nagios/bin/nrpe -d -c /usr/local/nagios/etc/nrpe.cfg [root@nagios nrpe-3.1.0]# echo "/usr/local/nagios/bin/nrpe -d -c /usr/local/nagios/etc/nrpe.cfg" >> /etc/rc.local [root@nagios nrpe-3.1.0]# chmod +x /etc/rc.d/rc.local # centos 7下須要這一步， 否則/etc/rc.local中的內容開機可能不執行 [root@nagios nrpe-3.1.0]# netstat -lnput|grep 5666 tcp 0 0 0.0.0.0:5666 0.0.0.0:* LISTEN 67176/nrpe tcp6 0 0 :::5666 :::* LISTEN 67176/nrpe [root@nagios nrpe-3.1.0]# /usr/local/nagios/libexec/check_nrpe -H localhost NRPE v3.1.0-rc1
nagios客戶端的安裝
下載nagios-plugin和nrpe插件
[root@client1 ~]# mkdir /software/ [root@client1 ~]# cd /software/ [root@client1 software]# wget https://nagios-plugins.org/download/nagios-plugins-2.2.1.tar.gz [root@client1 software]# wget https://sourceforge.net/projects/nagios/files/nrpe-3.x/nrpe-3.1.0.tar.gz
安裝nagios-plugin
安裝依賴包nginx
[root@client1 software]# yum install perl-devel perl-CPAN -y
建立用戶web
[root@client1 software]# useradd nagios -M -s /sbin/nologin
解壓nagios-plugin源碼包sql
[root@client1 software]# tar zxvf nagios-plugins-2.2.1.tar.gz
進入解壓後的目錄進行配置數據庫
[root@client1 software]# cd nagios-plugins-2.2.1/ [root@client1 nagios-plugins-2.2.1]# ./configure --with-nagios-user=nagios --with-nagios-group=nagios --enable-perl-modules
編譯及安裝
[root@client1 nagios-plugins-2.2.1]# make && make install
安裝nrpe插件
解壓nrpe源碼包
[root@client1 nagios-plugins-2.2.1]# cd .. [root@client1 software]# tar zxvf nrpe-3.1.0.tar.gz
進入解壓後的目錄進行配置
[root@client1 software]# cd nrpe-3.1.0/ [root@client1 nrpe-3.1.0]# ./configure
編譯及安裝
[root@client1 nrpe-3.1.0]# make all [root@client1 nrpe-3.1.0]# make install-plugin [root@client1 nrpe-3.1.0]# make install-daemon [root@client1 nrpe-3.1.0]# make install-daemon-config [root@client1 nrpe-3.1.0]# mkdir /usr/local/nagios/etc/ [root@client1 nrpe-3.1.0]# cp sample-config/nrpe.cfg /usr/local/nagios/etc/nrpe.cfg
安裝完成後，查看下libexec下面是否有插件
[root@client1 nrpe-3.1.0]# ls /usr/local/nagios/libexec/ check_apt check_dummy check_imap check_nagios check_overcr check_ssh negate check_breeze check_file_age check_ircd check_nntp check_ping check_ssmtp urlize check_by_ssh check_flexlm check_jabber check_nntps check_pop check_swap utils.pm check_clamd check_fping check_load check_nrpe check_procs check_tcp utils.sh check_cluster check_ftp check_log check_nt check_real check_time check_dhcp check_http check_mailq check_ntp check_rpc check_udp check_dig check_icmp check_mrtg check_ntp_peer check_sensors check_ups check_disk check_ide_smart check_mrtgtraf check_ntp_time check_simap check_uptime check_disk_smb check_ifoperstatus check_mysql check_nwstat check_smtp check_users check_dns check_ifstatus check_mysql_query check_oracle check_spop check_wave
啓動nrpe，並測試服務端本地是否能夠連通
[root@client1 nrpe-3.1.0]# /usr/local/nagios/bin/nrpe -d -c /usr/local/nagios/etc/nrpe.cfg [root@client1 nrpe-3.1.0]# echo "/usr/local/nagios/bin/nrpe -d -c /usr/local/nagios/etc/nrpe.cfg" >> /etc/rc.local [root@client1 nrpe-3.1.0]# chmod +x /etc/rc.d/rc.local # centos 7下須要這一步， 否則/etc/rc.local中的內容開機可能不執行 [root@client1 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@client1 nrpe-3.1.0]# /usr/local/nagios/libexec/check_nrpe -H localhost NRPE v3.1.0-rc1
修改配置文件
[root@client1 nrpe-3.1.0]# cd /usr/local/nagios/etc/
vi nrpe.cfg
容許服務端IP和本機訪問，172.16.0.18是nagios服務端IP地址
allowed_hosts=127.0.0.1,::1 ===> 修改成 allowed_hosts=127.0.0.1,::1,172.16.0.18
註釋下面幾行內容
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 command[check_hda1]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/hda1 command[check_zombie_procs]=/usr/local/nagios/libexec/check_procs -w 5 -c 10 -s Z command[check_total_procs]=/usr/local/nagios/libexec/check_procs -w 150 -c 200
在nrpe.cfg文件末尾增長下面幾行內容
# 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 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%
建立一個監控內存的perl腳本
[root@client1 etc]# vi /usr/local/nagios/libexec/check_mem.pl
添加下面內容
#! /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 - rouven.homann@cimt.de
# + 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 - rouven.homann@cimt.de
# + perfomance tweak with free -mt (just one sub process started instead of 7)
# + more code cleanup
#
# v1.4 Garrett Honeycutt - gh@3gupload.com
# + Fixed PerfData output to adhere to standards and show crit/warn values
#
# v1.3 Rouven Homann - rouven.homann@cimt.de
# + Memory installed, used and free displayed in verbose mode
# + Bit Code Cleanup
#
# v1.2 Rouven Homann - rouven.homann@cimt.de
# + 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 - rouven.homann@cimt.de
# + 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 - gh@3gupload.com
# + 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();
}
給腳本增長執行權限
[root@client1 etc]# chmod 755 /usr/local/nagios/libexec/check_mem.pl
重啓nrpe服務
# 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}'`
在本機執行兩個命令看下效果
[root@client1 etc]# /usr/local/nagios/libexec/check_nrpe -H localhost -c check_mem <b>CRITICAL: Memory Usage (W> 10, C> 3): 29% <br>Swap Usage (W> 100, C> 100): 12%</b>|MemUsed=29%;10;3 SwapUsed=12%;100;100 [root@client1 etc]# /usr/local/nagios/libexec/check_nrpe -H localhost -c check_disk DISK OK - free space: / 4201 MB (24.15% inode=97%);| /=13192MB;13915;15654;0;17394
服務端配置
nrpe鏈接客戶端機器測試是否能夠連通，而後執行一個監控命令（若是不通的話多是由於selinux和防火牆沒關閉而形成的）
[root@nagios nrpe-3.1.0]# /usr/local/nagios/libexec/check_nrpe -H 172.16.0.20 NRPE v3.1.0-rc1 [root@nagios nrpe-3.1.0]# /usr/local/nagios/libexec/check_nrpe -H 172.16.0.20 -c check_disk DISK OK - free space: / 4201 MB (24.15% inode=97%);| /=13192MB;13915;15654;0;17394
由於nagios默認把所有的權限給nagiosadmin，因此能夠經過修改cgi.cfg文件賦予nagios權限，切換到/usr/local/nagios/etc目錄下
[root@nagios nrpe-3.1.0]# cd /usr/local/nagios/etc [root@nagios etc]# ll 總用量 144 -rw-rw-r-- 1 nagios nagios 12999 4月 21 17:00 cgi.cfg -rw-r--r-- 1 root root 45 4月 24 09:28 htpasswd.users -rw-rw-r-- 1 nagios nagios 44831 4月 21 17:00 nagios.cfg -rw-r--r-- 1 root root 10765 4月 24 12:32 nrpe.cfg drwxrwxr-x 2 nagios nagios 336 4月 21 17:00 objects -rw-rw---- 1 nagios nagios 1312 4月 21 17:00 resource.cfg [root@nagios etc]# grep nagiosadmin cgi.cfg authorized_for_system_information=nagiosadmin authorized_for_configuration_information=nagiosadmin authorized_for_system_commands=nagiosadmin authorized_for_all_services=nagiosadmin authorized_for_all_hosts=nagiosadmin authorized_for_all_service_commands=nagiosadmin authorized_for_all_host_commands=nagiosadmin [root@nagios etc]# sed -i 's/nagiosadmin/nagiosadmin,nagios/g' cgi.cfg [root@nagios etc]# grep nagiosadmin cgi.cfg authorized_for_system_information=nagiosadmin,nagios authorized_for_configuration_information=nagiosadmin,nagios authorized_for_system_commands=nagiosadmin,nagios authorized_for_all_services=nagiosadmin,nagios authorized_for_all_hosts=nagiosadmin,nagios authorized_for_all_service_commands=nagiosadmin,nagios authorized_for_all_host_commands=nagiosadmin,nagios
修改nagios.cfg（自定義一些配置）
[root@nagios etc]# vi nagios.cfg +34 #註釋掉下面這行 #cfg_file=/usr/local/nagios/etc/objects/localhost.cfg #添加下面兩行內容 cfg_file=/usr/local/nagios/etc/objects/services.cfg cfg_file=/usr/local/nagios/etc/objects/hosts.cfg
建立hosts.cfg和services.cfg這兩個文件
[root@nagios etc]# cd objects/ [root@nagios objects]# pwd /usr/local/nagios/etc/objects [root@nagios objects]# touch services.cfg [root@nagios objects]# head -51 localhost.cfg > hosts.cfg [root@nagios objects]# chown -R nagios.nagios *
修改nagios檢查語法腳本
[root@nagios objects]# vim /etc/init.d/nagios +181 #check_config $NagiosBin -v $NagiosCfgFile;
vi commands.cfg 進入後按shift+g切到結尾加入下面內容。
# 'check_nrpe' command definition
define command{
command_name check_nrpe
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
}
# 'check_ping' command definition
define command{
command_name check-ping
command_line $USER1$/check_ping -H $HOSTADDRESS$ -w 100.0,20% -c 200.0,50% -p 3 -t 2
}
# 'check_http' command definition
define command{
command_name check-weburl
command_line $USER1$/check_http -H $HOSTADDRESS$ $ARG1$ -w 5 -c 10
}
# 'check_tcp' command definition
define command{
command_name check-tcp
command_line $USER1$/check_tcp -H $HOSTADDRESS$ -p $ARG1$ -w 0.02 -c 0.1
}
查看有哪些cfg文件
[root@nagios objects]# pwd /usr/local/nagios/etc/objects [root@nagios objects]# ll 總用量 100 -rw-rw-r-- 1 nagios nagios 7860 4月 24 16:53 commands.cfg -rw-rw-r-- 1 nagios nagios 2138 4月 21 17:00 contacts.cfg -rw-r--r-- 1 nagios nagios 1843 4月 24 16:46 hosts.cfg -rw-rw-r-- 1 nagios nagios 5379 4月 21 17:00 localhost.cfg -rw-rw-r-- 1 nagios nagios 3070 4月 21 17:00 printer.cfg -rw-r--r-- 1 nagios nagios 0 4月 24 16:46 services.cfg -rw-rw-r-- 1 nagios nagios 3252 4月 21 17:00 switch.cfg -rw-rw-r-- 1 nagios nagios 10595 4月 21 17:00 templates.cfg -rw-rw-r-- 1 nagios nagios 3180 4月 21 17:00 timeperiods.cfg -rw-rw-r-- 1 nagios nagios 3991 4月 21 17:00 windows.cfg
經常使用對象介紹
- 聯繫人
contact
出了問題像誰報告?通常固然是系統管理員了- 監控時間段
timeperiod
7X24小時不間斷仍是週一至週五,或是自定義的其餘時間段- 被監控主機
host
所須要監控的服務器,固然能夠是監控機本身- 監控命令
command
nagios發出的哪一個指令來執行某個監控,這也是本身定義的- 被監控的服務
service
例如主機是否存活,80端口是否開,磁盤使用狀況或者自定義的服務等
contacts.cfg文件介紹
- service_notification_period 24x7
服務出了情況通知的時間段,這個時間段就是上面在timeperiods.cfg中定義的.- host_notification_period 24x7
主機出了情況通知的時間段, 這個時間段就是上面在timeperiods.cfg中定義的- service_notification_options w,u,c,r
當服務出現w—報警(warning),u—未知(unkown),c—嚴重(critical),或者r—從異常狀況恢復正常,在這四種狀況下通知聯繫人.- host_notification_options d,u,r
當主機出現d—當機(down),u—返回不可達(unreachable),r—從異常狀況恢復正常,在這3種狀況下通知聯繫人- service_notification_commands notify- service -by-email
服務出問題通知採用的命令notify-by-email,這個命令是在commands.cfg中定義的,做用是給聯繫人發郵件.至於commands.cfg以後將專門介紹- host_notification_commands host-notify-by-email notify- host--by-email
同上,主機出問題時採用的也是發郵件的方式通知聯繫人- email 123456@qq.com
很明顯,聯繫的人email地址- pager 1338757xxxx
聯繫人的手機,若是支持短信的通知的話,這個就頗有用了.- alias是聯繫人別名,address是地址 .
contactgroups.cfg文件介紹
define contactgroup{
contactgroup_name 組名 //聯繫人組的名稱
alias 別名 //別名
members 用戶名 //組的成員,來自於上面定義的contacts.cfg,若是有多個聯繫人則以逗號相隔
}
主機模板介紹（hosts.cfg）
> ```# host
define host{
host_name 主機名 //被監控主機的名稱,最好別帶空格nagios-server
alias 別名
address IP //被監控主機的IP地址
check_command check-host-alive //監控的命令check-host-alive,這個命令來自commands.cfg,用來監控主機是否存活
max_check_attempts 5 //檢查失敗後重試的次數
check_period 24x7 //檢查的時間段24x7,一樣來自於咱們以前在 timeperiods.cfg中定義的
contact_groups 組名 //聯繫人組,上面在contactgroups.cfg中定義的組名
notification_interval 10 //提醒的間隔,每隔10秒提醒一次
notification_period 24x7 //提醒的週期, 24x7,一樣來自於咱們以前在timeperiods.cfg中定義的
notification_options d,u,r //指定什麼狀況下提醒,具體含義見以前contacts.cfg部分的介紹
}
主機組模板介紹（hosts.cfg）
define hostgroup{
hostgroup_name 主機組名
alias 別名
members 主機名 //組的成員主機,多個主機以逗號相隔,必須是上面hosts.cfg中定義的
}
服務模板介紹（services.cfg）
> ```# service definition
define service{
host_name 主機名 //被監控的主機,hosts.cfg中定義的
service_description check-host-alive //這個監控項目的描述(也能夠說是這個項目的名稱),能夠空格,咱們這裏定義的是監控這個主機是否是存活
check_command check-host-alive //所用的命令,是commands.cfg中定義的
max_check_attempts 5
normal_check_interval 3
retry_check_interval 2
check_period 24x7 //監控的時間段,是timeperiods.cfg中定義的
notification_interval 10
notification_period 24x7 //通知的時間段, ,是timeperiods.cfg中定義的
notification_options w,u,c,r //在監控的結果是wucr時通知聯繫人,具體含義看前文.
contact_groups 組名 //聯繫人組,是contactgroups.cfg中定義的
}
主機模板配置
[root@nagios objects]# vi hosts.cfg +21
刪除下面11行內容
添加下面內容
# Define some hosts
###########172.16.0.18##################
define host {
use linux-server
host_name nagios
alias nagios
address 172.16.0.18
check_command check-host-alive
max_check_attempts 3
normal_check_interval 2
retry_check_interval 2
check_period 24x7
notification_interval 300
notification_period 24x7
notification_options d,u,r
contact_groups admins
process_perf_data 1
}
###########172.16.0.18##################
define host {
use linux-server
host_name client1
alias client1
address 172.16.0.20
check_command check-host-alive
max_check_attempts 3
normal_check_interval 2
retry_check_interval 2
check_period 24x7
notification_interval 300
notification_period 24x7
notification_options d,u,r
contact_groups admins
process_perf_data 1
}
把監控的主機添加到主機組裏面
[root@nagios objects]# vi hosts.cfg +76
define hostgroup{
hostgroup_name linux-servers ; The name of the hostgroup
alias Linux Servers ; Long name of the group
members nagios,client1 ; Comma separated list of hosts that belong to this group
}
服務模板配置
[root@nagios objects]# pwd
/usr/local/nagios/etc/objects
[root@nagios objects]# vi services.cfg
添加下面內容
###########172.16.0.18##################
define service{
use generic-service
host_name nagios
service_description Load
check_command check_nrpe!check_load #這裏的check_nrpe不是服務端/usr/local/nagios/libexec/check_nrpe,而是command.cfg裏定義的命令
}
define service{
use generic-service
host_name nagios
service_description Disk
check_command check_nrpe!check_disk
}
define service{
use generic-service
host_name nagios
service_description memory
check_command check_nrpe!check_mem
}
define service{
use generic-service
host_name nagios
service_description Ping
check_command check-ping!172.16.0.18
}
define service{
use generic-service
host_name nagios
service_description port_3306
check_command check-tcp!3306
}
###########172.16.0.20##################
define service{
use generic-service
host_name client1
service_description Load
check_command check_nrpe!check_load
}
define service{
use generic-service
host_name client1
service_description Disk
check_command check_nrpe!check_disk
}
define service{
use generic-service
host_name client1
service_description memory
check_command check_nrpe!check_mem
}
define service{
use generic-service
host_name client1
service_description Ping
check_command check-ping!172.16.0.20
}
define service{
use generic-service
host_name client1
service_description port_3306
check_command check-tcp!3306
}
重啓nagios服務
[root@nagios objects]# /etc/init.d/nagios restart
打開瀏覽器訪問
點擊hosts
點擊services
ok，咱們的配置告一段落了。
出圖部分
下載pnp4nagios源碼包
[root@nagios objects]# cd /software/ [root@nagios software]# wget https://jaist.dl.sourceforge.net/project/pnp4nagios/PNP-0.6/pnp4nagios-0.6.25.tar.gz
安裝依賴包
[root@nagios software]# yum install cairo pango perl-rrdtool rrdtool librrds-perl zlib zlib-devel freetype freetype-devel gd gd-devel -y
解壓pnp4nagios源碼包
[root@nagios software]# tar zxf pnp4nagios-0.6.25.tar.gz
進入解壓後的目錄配置png
[root@nagios pnp4nagios-0.6.25]# ./configure --with-nagios-user=nagios --with-nagios-group=nagios
編譯及安裝
[root@nagios pnp4nagios-0.6.25]# make all [root@nagios pnp4nagios-0.6.25]# make install [root@nagios pnp4nagios-0.6.25]# make install-webconf [root@nagios pnp4nagios-0.6.25]# make install-config [root@nagios pnp4nagios-0.6.25]# make install-init [root@nagios pnp4nagios-0.6.25]# cd sample-config/ [root@nagios sample-config]# make install-webconf
配置pnp4nagios
[root@nagios sample-config]# cd /usr/local/pnp4nagios/etc/ [root@nagios etc]# mv misccommands.cfg-sample misccommands.cfg [root@nagios etc]# mv rra.cfg-sample rra.cfg [root@nagios etc]# mv nagios.cfg-sample nagios.cfg [root@nagios etc]# cd pages/ [root@nagios pages]# mv web_traffic.cfg-sample web_traffic.cfg [root@nagios pages]# cd ../check_commands/ [root@nagios check_commands]# mv check_all_local_disks.cfg-sample check_all_local_disks.cfg [root@nagios check_commands]# mv check_nrpe.cfg-sample check_nrpe.cfg [root@nagios check_commands]# mv check_nwstat.cfg-sample check_nwstat.cfg [root@nagios check_commands]# systemctl enable npcd [root@nagios check_commands]# systemctl start npcd
配置Nagios數據輸出接口(以BULK模式運行)詳情參考官網https://docs.pnp4nagios.org/pnp-0.6/config#bulk_mode：
[root@nagios check_commands]# vi /usr/local/nagios/etc/nagios.cfg process_performance_data=1 #默認爲0，修改成1 並在該文件中添加下面的內容 # # service performance data # service_perfdata_file=/usr/local/pnp4nagios/var/service-perfdata service_perfdata_file_template=DATATYPE::SERVICEPERFDATA\tTIMET::$TIMET$\tHOSTNAME::$HOSTNAME$\tSERVICEDESC::$SERVICEDESC$\tSERVICEPERFDATA::$SERVICEPERFDATA$\tSERVICECHECKCOMMAND::$SERVICECHECKCOMMAND$\tHOSTSTATE::$HOSTSTATE$\tHOSTSTATETYPE::$HOSTSTATETYPE$\tSERVICESTATE::$SERVICESTATE$\tSERVICESTATETYPE::$SERVICESTATETYPE$ service_perfdata_file_mode=a service_perfdata_file_processing_interval=15 service_perfdata_file_processing_command=process-service-perfdata-file # # host performance data starting with Nagios # host_perfdata_file=/usr/local/pnp4nagios/var/host-perfdata host_perfdata_file_template=DATATYPE::HOSTPERFDATA\tTIMET::$TIMET$\tHOSTNAME::$HOSTNAME$\tHOSTPERFDATA::$HOSTPERFDATA$\tHOSTCHECKCOMMAND::$HOSTCHECKCOMMAND$\tHOSTSTATE::$HOSTSTATE$\tHOSTSTATETYPE::$HOSTSTATETYPE$ host_perfdata_file_mode=a host_perfdata_file_processing_interval=15 host_perfdata_file_processing_command=process-host-perfdata-file
配置command.cfg
[root@nagios check_commands]# vi /usr/local/nagios/etc/objects/commands.cfg
在該文件中添加下面的內容
define command{
command_name process-service-perfdata-file
command_line /usr/local/pnp4nagios/libexec/process_perfdata.pl --bulk=/usr/local/pnp4nagios/var/service-perfdata
}
define command{
command_name process-host-perfdata-file
command_line /usr/local/pnp4nagios/libexec/process_perfdata.pl --bulk=/usr/local/pnp4nagios/var/host-perfdata
}
在模板配置文件中添加圖表圖標模板：
[root@nagios check_commands]# vi /usr/local/nagios/etc/objects/templates.cfg
在該文件中添加下面的內容
define host {
name host-pnp
action_url /pnp4nagios/index.php/graph?host=$HOSTNAME$&srv=_HOST_
register 0
}
define service {
name service-pnp
action_url /pnp4nagios/index.php/graph?host=$HOSTNAME$&srv=$SERVICEDESC$
register 0
}
在監控主機和服務中調用圖表模板（在主機和服務後面添加新的模板）：
[root@nagios check_commands]# vi /usr/local/nagios/etc/objects/hosts.cfg
主機內容修改以下
###########172.16.0.18##################
define host {
use linux-server,host-pnp
host_name nagios
alias nagios
address 172.16.0.18
check_command check-host-alive
max_check_attempts 3
normal_check_interval 2
retry_check_interval 2
check_period 24x7
notification_interval 300
notification_period 24x7
notification_options d,u,r
contact_groups admins
process_perf_data 1
}
###########172.16.0.18##################
define host {
use linux-server,host-pnp
host_name client1
alias client1
address 172.16.0.20
check_command check-host-alive
max_check_attempts 3
normal_check_interval 2
retry_check_interval 2
check_period 24x7
notification_interval 300
notification_period 24x7
notification_options d,u,r
contact_groups admins
process_perf_data 1
}
[root@nagios check_commands]# vi /usr/local/nagios/etc/objects/services.cfg
服務內容修改以下
###########172.16.0.18##################
define service{
use generic-service,service-pnp
host_name nagios
service_description Load
check_command check_nrpe!check_load #這裏的check_nrpe不是服務端/usr/local/nagios/libexec/check_nrpe,而是command.cfg裏定義的命令
}
define service{
use generic-service,service-pnp
host_name nagios
service_description Disk
check_command check_nrpe!check_disk
}
define service{
use generic-service,service-pnp
host_name nagios
service_description memory
check_command check_nrpe!check_mem
}
define service{
use generic-service,service-pnp
host_name nagios
service_description Ping
check_command check-ping!172.16.0.18
}
define service{
use generic-service,service-pnp
host_name nagios
service_description port_3306
check_command check-tcp!3306
}
###########172.16.0.20##################
define service{
use generic-service,service-pnp
host_name client1
service_description Load
check_command check_nrpe!check_load
}
define service{
use generic-service,service-pnp
host_name client1
service_description Disk
check_command check_nrpe!check_disk
}
define service{
use generic-service,service-pnp
host_name client1
service_description memory
check_command check_nrpe!check_mem
}
define service{
use generic-service,service-pnp
host_name client1
service_description Ping
check_command check-ping!172.16.0.20
}
define service{
use generic-service,service-pnp
host_name client1
service_description port_3306
check_command check-tcp!3306
}
圖表展現
重啓nagios和apache
[root@nagios check_commands]# /etc/init.d/nagios checkconfig [root@nagios check_commands]# /etc/init.d/nagios restart [root@nagios check_commands]# systemctl restart httpd
訪問nagios界面便可看到圖表小圖標：
點擊圖標會顯示pnp4nagios測試頁面：
全是綠色表明配置正常，若是不是全綠，要逐個解決錯誤。而後移除或修改install.php文件：
[root@nagios ~]# rm -rf /usr/local/pnp4nagios/share/install.php
再次點擊圖標就會顯示當前監控服務由pnp4nagios生成的圖表了
郵件報警配置
查看sendmail郵件系統是否安裝
[root@nagios ~]# rpm -qa|grep sendmail
若是沒有安裝，能夠yum安裝一下
[root@nagios ~]# yum -y install sendmail
啓動sendmail
[root@nagios ~]# systemctl enable sendmail [root@nagios ~]# systemctl start sendmail
測試發送郵件：
[root@nagios ~]# echo "test" | mail zhengxinlei@test.com.cn
發送外部郵件的時候，這種本地形式的發件人和發件地址容易被誤認爲垃圾郵件而拒收。
咱們這裏定義郵件發送smtp信息。
首先安裝mailx12.5
wget http://fossies.org/linux/misc/old/mailx-12.5.tar.gz tar zxf mailx-12.5.tar.gz cd mailx-12.5 make make install UCBINSTALL=/usr/bin/install mv /bin/mail /bin/mail_old ln -s /usr/local/bin/mailx /bin/mail mail -V
接下來配置外部smtp發件信息
vi /etc/nail.rc 添加以下內容： set bsdcompat set from=yunwei@yasn.com.cn set smtp=smtp.yasn.com.cn set smtp-auth-user=yunwei@yasn.com.cn set smtp-auth-password=123456 set smtp-auth=login
測試郵件發送
echo 'mail content'|mail -s test zhengxinlei@test.com.cn
發送郵件測試，能夠看到發件人是咱們設定的外部郵件發件人
編輯contacts.cfg，定義郵件聯繫人和組
[root@nagios ~]# cd /usr/local/nagios/etc/objects/
[root@nagios objects]# ls
commands.cfg localhost.cfg~ services.cfg templates.cfg hosts.cfg printer.cfg
switch.cfg windows.cfg contacts.cfg localhost.cfg timeperiods.cfg
[root@nagios objects]# vi contacts.cfg // 修改內容以下
define contact{
contact_name nagiosadmin ; Short name of user
use generic-contact ; Inherit default values from generic-contact template (defined above)
alias Nagios Admin ; Full name of user
#email nagios@localhost ; <<***** CHANGE THIS TO YOUR EMAIL ADDRESS ******
email 3166@vip.qq.com,xinlei@126.com
}
define contactgroup{
contactgroup_name admins
alias Nagios Administrators
members nagiosadmin
}
編輯commands.cfg文件，定義郵件發送命令
[root@nagios objects]# vi commands.cfg // 查看下面內容是否存在，不存在則添加
# 'notify-host-by-email' command definition
define command{
command_name notify-host-by-email
command_line /usr/bin/printf "%b" "***** Nagios ***** Notification Type: $NOTIFICATIONTYPE$ Host: $HOSTNAME$ State: $HOSTSTATE$ Address: $HOSTADDRESS$ Info: $HOSTOUTPUT$ Date/Time: $LONGDATETIME$ " | /bin/mail -s "** $NOTIFICATIONTYPE$ Host Alert: $HOSTNAME$ is $HOSTSTATE$ **" $CONTACTEMAIL$
}
# 'notify-service-by-email' command definition
define command{
command_name notify-service-by-email
command_line /usr/bin/printf "%b" "***** Nagios ***** Notification Type: $NOTIFICATIONTYPE$ Service: $SERVICEDESC$ Host: $HOSTALIAS$ Address: $HOSTADDRESS$ State: $SERVICESTATE$ Date/Time: $LONGDATETIME$ Additional Info: $SERVICEOUTPUT$ " | /bin/mail -s "** $NOTIFICATIONTYPE$ Service Alert: $HOSTALIAS$/$SERVICEDESC$ is $SERVICESTATE$ **" $CONTACTEMAIL$
}
修改一下監控的閥值，模擬報警。
重啓nagios服務和sendmail服務
[root@nagios ~]# systemctl restart nagios [root@nagios ~]# systemctl stop sendmail [root@nagios ~]# ps -ef|grep sendmail [root@nagios ~]# systemctl start sendmail [root@nagios ~]# ps -ef|grep sendmail
查看報警的郵件，來幾張圖吧：
這是報警恢復後的郵件：
ok，搞定了。
常見郵件發送報錯：
報錯1
解決方法：
修改hosts爲域名形式
[root@nagios objects]# cat /etc/hosts 172.16.0.18 nagios nagios.com
報錯2（發送外部郵件的時候，這種本地形式的發件人和發件地址容易被誤認爲垃圾郵件而拒收。）
解決方法，見上面配置mail發件人smtp信息。
監視物理組件的高級 Linux 命令（僅供參考）
內存：top free、vmstat、mpstat、iostat、sar
CPU：top vmstat、mpstat、iostat、sar
I/O：vmstat、mpstat、iostat、sar
進程：ipcs、ipcrm
負載：uptime
一鍵安裝nagios命令參考
#############nagios-server-install######################## mkdir /software/ # mv nagios-4.3.1.tar.gz nagios-plugins-2.2.1.tar.gz nrpe-3.1.0.tar.gz pnp4nagios-0.6.25.tar.gz /software/ cd /software/ 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 wget https://jaist.dl.sourceforge.net/project/pnp4nagios/PNP-0.6/pnp4nagios-0.6.25.tar.gz yum -y install httpd httpd-devel gcc glibc glibc-common gd gd-devel perl-devel perl-CPAN fcgi perl-FCGI perl-FCGI-ProcManager tar zxvf nagios-4.3.1.tar.gz cd nagios-4.3.1/ useradd nagios -s /sbin/nologin id www groupadd nagcmd usermod -a -G nagcmd nagios usermod -a -G nagcmd www id -n -G nagios id -n -G www ./configure --with-command-group=nagcmd make all make install-init make install-commandmode make install-config make install sleep 2 cp -R contrib/eventhandlers/ /usr/local/nagios/libexec/ chown -R nagios:nagios /usr/local/nagios/libexec/eventhandlers /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg make install-webconf echo 'nagios:$apr1$UigX6LG0$29RugFJZTSxRjnX4NIH3E0' > /usr/local/nagios/etc/htpasswd.users sed -i 's/Listen 80/Listen 8080/g' /etc/httpd/conf/httpd.conf sed -i 's/User apache/User www/g' /etc/httpd/conf/httpd.conf sed -i 's/Group apache/Group www/g' /etc/httpd/conf/httpd.conf sed -i 's/DirectoryIndex index.html/DirectoryIndex index.php index.html/g' /etc/httpd/conf/httpd.conf grep 'Listen' /etc/httpd/conf/httpd.conf grep 'User' /etc/httpd/conf/httpd.conf grep 'Group' /etc/httpd/conf/httpd.conf grep 'DirectoryIndex' /etc/httpd/conf/httpd.conf cd /software/php-7.1.4/ ./configure --prefix=/usr/local/php --enable-fpm --with-fpm-user=www --with-fpm-group=www --with-mysqli --with-zlib --with-curl --with-gd --with-jpeg-dir --with-png-dir --with-freetype-dir --with-openssl --enable-mbstring --enable-xml --enable-session --enable-ftp --enable-pdo -enable-tokenizer --enable-zip --with-apxs2 make && make install sleep 1 cd /etc/httpd/ ll /etc/httpd/modules/libphp7.so systemctl start httpd systemctl enable httpd chkconfig nagios on /etc/init.d/nagios start cd /software/ tar zxvf nagios-plugins-2.2.1.tar.gz cd nagios-plugins-2.2.1/ ./configure --with-nagios-user=nagios --with-nagios-group=nagcmd --enable-perl-modules make && make install cd /software/ tar zxvf nrpe-3.1.0.tar.gz cd nrpe-3.1.0/ ./configure make all make install-plugin make install-daemon make install-daemon-config cp sample-config/nrpe.cfg /usr/local/nagios/etc/nrpe.cfg ls /usr/local/nagios/libexec/ /usr/local/nagios/bin/nrpe -d -c /usr/local/nagios/etc/nrpe.cfg echo "/usr/local/nagios/bin/nrpe -d -c /usr/local/nagios/etc/nrpe.cfg" >> /etc/rc.local chmod +x /etc/rc.d/rc.local netstat -lnput|grep 5666 /usr/local/nagios/libexec/check_nrpe -H localhost #######################nagios-client-install########################### mkdir /software/ # mv nagios-plugins-2.2.1.tar.gz nrpe-3.1.0.tar.gz /software/ cd /software/ 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 yum install perl-devel perl-CPAN -y useradd nagios -M -s /sbin/nologin tar zxvf 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 sleep 1 cd .. tar zxvf nrpe-3.1.0.tar.gz cd nrpe-3.1.0/ ./configure make all make install-plugin make install-daemon make install-daemon-config mkdir /usr/local/nagios/etc/ cp sample-config/nrpe.cfg /usr/local/nagios/etc/nrpe.cfg ls /usr/local/nagios/libexec/ /usr/local/nagios/bin/nrpe -d -c /usr/local/nagios/etc/nrpe.cfg echo "/usr/local/nagios/bin/nrpe -d -c /usr/local/nagios/etc/nrpe.cfg" >> /etc/rc.local chmod +x /etc/rc.d/rc.local netstat -lnput|grep 5666 sed -i 's/allowed_hosts=127.0.0.1,::1/allowed_hosts=127.0.0.1,::1,172.16.0.1/g' /usr/local/nagios/etc/nrpe.cfg sed -i 's/^command\[check/\#command\[check/g' /usr/local/nagios/etc/nrpe.cfg cat >> /usr/local/nagios/etc/nrpe.cfg << EOF # 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 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% EOF /usr/local/nagios/libexec/check_nrpe -H localhost -c check_disk
總結：多多查看nagios日誌和mail日誌，進行排錯。
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