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案例拓撲圖

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安裝keepalived和nginx

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安裝keepalived

#?yum?-y?install?keepalived

創建nginx用戶組及nginx用戶

#?groupadd?-r?nginx #?useradd?-g?nginx?-r?nginx

編譯安裝nginx-1.4.7

#?tar?xf?nginx-1.4.7.tar.gz? #?cd?nginx-1.4.7 #?./configure?\--prefix=/usr?\--sbin-path=/usr/sbin/nginx?\--conf-path=/etc/nginx/nginx.conf?\--error-log-path=/var/log/nginx/error.log?\--http-log-path=/var/log/nginx/access.log?\--pid-path=/var/run/nginx/nginx.pid??\--lock-path=/var/lock/nginx.lock?\--user=nginx?\--group=nginx?\--with-http_ssl_module?\--with-http_flv_module?\--with-http_stub_status_module?\--with-http_gzip_static_module?\--http-client-body-temp-path=/usr/local/nginx/client/?\--http-proxy-temp-path=/usr/local/nginx/proxy/?\--http-fastcgi-temp-path=/usr/local/nginx/fcgi/?\--http-uwsgi-temp-path=/usr/local/nginx/uwsgi?\--http-scgi-temp-path=/usr/local/nginx/scgi?\--with-pcre #?make?&&?make?install

檢查配置文件是否有語法錯誤

[root@localhost?nginx-1.4.7]#?nginx?-t nginx:?the?configuration?file?/etc/nginx/nginx.conf?syntax?is?ok nginx:?[emerg]?mkdir()?"/usr/local/nginx/client/"?failed?(2:?No?such?file?or?directory) nginx:?configuration?file?/etc/nginx/nginx.conf?test?failed

修改錯誤

#?mkdir?/usr/local/nginx

再次檢查配置文件是否有語法錯誤

[root@localhost?nginx-1.4.7]#?nginx?-t

為nginx提供SysV init腳本

#?vim?/etc/rc.d/init.d/nginx#!/bin/sh # #?nginx?-?this?script?starts?and?stops?the?nginx?daemon # #?chkconfig:???-?85?15? #?description:??Nginx?is?an?HTTP(S)?server,?HTTP(S)?reverse?\ #???????????????proxy?and?IMAP/POP3?proxy?server #?processname:?nginx #?config:??????/etc/nginx/nginx.conf #?config:??????/etc/sysconfig/nginx #?pidfile:?????/var/run/nginx.pid#?Source?function?library. .?/etc/rc.d/init.d/functions#?Source?networking?configuration. .?/etc/sysconfig/network#?Check?that?networking?is?up. [?"$NETWORKING"?=?"no"?]?&&?exit?0nginx="/usr/sbin/nginx" prog=$(basename?$nginx)NGINX_CONF_FILE="/etc/nginx/nginx.conf"[?-f?/etc/sysconfig/nginx?]?&&?.?/etc/sysconfig/nginxlockfile=/var/lock/subsys/nginxmake_dirs()?{#?make?required?directoriesuser=`nginx?-V?2>&1?|?grep?"configure?arguments:"?|?sed?'s/[^*]*--user=\([^?]*\).*/\1/g'?-`options=`$nginx?-V?2>&1?|?grep?'configure?arguments:'`for?opt?in?$options;?doif?[?`echo?$opt?|?grep?'.*-temp-path'`?];?thenvalue=`echo?$opt?|?cut?-d?"="?-f?2`if?[?!?-d?"$value"?];?then#?echo?"creating"?$valuemkdir?-p?$value?&&?chown?-R?$user?$valuefifidone }start()?{[?-x?$nginx?]?||?exit?5[?-f?$NGINX_CONF_FILE?]?||?exit?6make_dirsecho?-n?$"Starting?$prog:?"daemon?$nginx?-c?$NGINX_CONF_FILEretval=$?echo[?$retval?-eq?0?]?&&?touch?$lockfilereturn?$retval }stop()?{echo?-n?$"Stopping?$prog:?"killproc?$prog?-QUITretval=$?echo[?$retval?-eq?0?]?&&?rm?-f?$lockfilereturn?$retval }restart()?{configtest?||?return?$?stopsleep?1start }reload()?{configtest?||?return?$?echo?-n?$"Reloading?$prog:?"killproc?$nginx?-HUPRETVAL=$?echo }force_reload()?{restart }configtest()?{$nginx?-t?-c?$NGINX_CONF_FILE }rh_status()?{status?$prog }rh_status_q()?{rh_status?>/dev/null?2>&1 }case?"$1"?instart)rh_status_q?&&?exit?0$1;;stop)rh_status_q?||?exit?0$1;;restart|configtest)$1;;reload)rh_status_q?||?exit?7$1;;force-reload)force_reload;;status)rh_status;;condrestart|try-restart)rh_status_q?||?exit?0;;*)echo?$"Usage:?$0?{start|stop|status|restart|condrestart|try-restart|reload|force-reload|configtest}"exit?2 esac

賦予nginx腳本執行權限

#?chmod?+x?/etc/rc.d/init.d/nginx

添加至服務管理列表，并讓其開機自動啟動

#?chkconfig?--add?nginx #?chkconfig?nginx?on

提示：在兩個keepalived+nginx主機上都需安裝keepalkved和nginx服務

配置nginx為反向代理服務器

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編輯nginx.conf配置文件

#?cd?/etc/nginx/ #?vim?nginx.conf

在nginx.conf配置文件中的http段內添加如下內容

upstream?webservers?{server?10.170.2.101;server?10.170.2.102; } server?{listen?80;server_name?www.muluhe.com;location?/?{proxy_pass?http://webservers;proxy_set_header?X-Real-IP?$remote_addr;} }

提示：在兩臺keepalived+nginx主機的nginx.conf的配置文件所添加的內容一樣

配置keepalived

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編輯keepalived.conf配置文件

#?cd?/etc/keepalived/ #?vim?keepalived.conf

IP地址為10.170.2.60的配置文件內容為：

!?Configuration?File?for?keepalived global_defs?{notification_email?{acassen@firewall.locfailover@firewall.locsysadmin@firewall.loc}notification_email_from?Alexandre.Cassen@firewall.locsmtp_server?192.168.200.1smtp_connect_timeout?30router_id?LVS_DEVEL } vrrp_instance?VI_1?{state?MASTERinterface?eth0virtual_router_id?15priority?100advert_int?1authentication?{auth_type?PASSauth_pass?111111}virtual_ipaddress?{10.170.2.100}notify_master?"/etc/init.d/nginx?start"notify_backup?"/etc/init.d/nginx?stop"notify_fault?"/etc/init.d/nginx?stop" }

IP地址為10.170.2.61的配置文件內容為

!?Configuration?File?for?keepalived global_defs?{notification_email?{acassen@firewall.locfailover@firewall.locsysadmin@firewall.loc}notification_email_from?Alexandre.Cassen@firewall.locsmtp_server?192.168.200.1smtp_connect_timeout?30router_id?LVS_DEVEL } vrrp_instance?VI_1?{state?BACKUPinterface?eth0virtual_router_id?15priority?99advert_int?1authentication?{auth_type?PASSauth_pass?111111}virtual_ipaddress?{10.170.2.100}notify_master?"/etc/init.d/nginx?start"notify_backup?"/etc/init.d/nginx?stop"notify_fault?"/etc/init.d/nginx?stop" }

配置web1和web2服務器

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編輯web1測試頁面

#?vim?/var/www/html/index.html 內容為：<h1>www1.muluhe.com</h1>

啟動httpd服務

#?/etc/init.d/httpd?start

編輯web2測試頁面

#?vim?/var/www/html/index.html 內容為：<h1>www2.muluhe.com</h1>

啟動httpd服務

#?/etc/init.d/httpd?start

啟動keepalived服務并進行測試

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啟動keepalived+nginx兩臺主機的keepalived服務

#?/etc/init.d/keepalived?start

在瀏覽器中鍵入10.170.2.100，刷新幾下，可得到如下結果

關閉IP地址為10.170.2.60那臺主機的keepalived服務

#?/etc/init.d/keepalived?stop

再次在瀏覽器中鍵入10.170.2.100，刷新幾下，查看結果如下

由以上結果可以，keepalived實現了nginx反向代理的高可用以及nginx實現了web的負載均衡效果。

轉載于:https://blog.51cto.com/muluhe/1555180

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