Nginx+keepalived 脚本安装主从双机热备自动切换解决方案

nui9

Nginx+keepalived主从双机热备自动切换解决方案

测试环境如下：

系统：Ceentos 6.4 64位

主nginx服务器：192.168.122.5

备nginx服务器：192.168.122.6

VIP：192.168.122.15

一、Nginx+keepalived 安装—脚本安装

#!/bin/bash # author: kuangl # mail: kuangl@orient-media.com # description: The installation of Nginx files. # -------------------------------------------------------- # ## Nginx_install # -------------------------------------------------------- # # Nginx installation #CURRENT_PATH=$(pwd) for i in $(rpm -q gcc gcc-c++ kernel-devel openssl-devel zlib-devel popt-devel popt-static libnl-devel wget make |grep 'not installed' | awk '{print $2}') do yum -y install $i done [ -d /root/software ] [ "$?" != 0 ] && mkdir /root/software cd /root/software [ !-e pcre-8.33.tar.gz ] && wget ftp://ftp.csx.cam.ac.uk/pub/soft ... re/pcre-8.33.tar.gz tar -zxvf pcre-8.33.tar.gz cd pcre-8.33 ./configure make && make install echo $? || [ $? != 0] || echo" installation pcrefailed" || exit 1 cd /root/software [ ! -e nginx-1.2.9.tar.gz ] && wget http://nginx.org/download/nginx-1.2.9.tar.gz tar -zxvf nginx-1.2.9.tar.gz cd nginx-1.2.9 ./configure--prefix=/usr/local/nginx --with-http_ssl_module --with-http_sub_module --with-http_stub_status_module--with-http_gzip_static_module make && make install echo $? || [ $? != 0] || echo" installationnginxfailed" || exit 1 # -------------------------------------------------------- # ## Keepalived_intsall # -------------------------------------------------------- # # Keepalived installation cd /root/softwarae [ ! -e keepalived-1.2.4.tar.gz ] &&wget http://www.keepalived.org/software/keepalived-1.2.4.tar.gz tar -zxvf keepalived-1.2.4.tar.gz cd keepalived-1.2.4 ln -s /usr/src/kernels/$(uname -r) /usr/src/kernels/linux ./configure --prefix=/usr--bindir=/usr/bin--sbindir=/usr/bin--libexecdir=/usr/libexec --localstatedir=/var --libdir=/lib64--infodir=/usr/share/info--sysconfdir=/etc --mandir=/usr/local/share/man--with-kernel-dir=/usr/src/kernels/linux make && make install echo $? || [ $? != 0] || print " installation keepalivedfailed" || exit 1 chkconfig --add keepalived chkconfig --level 345 keepalived on

二、主Nginx 配置

[iyunv@node5 conf]# mkdir -p /var/www/html [iyunv@node5 conf]# cat "192.168.122.5" > /var/www/html/index.html [iyunv@node5 conf]# vim nginx.conf [iyunv@node5 conf]# ../sbin/nginx -s reload [iyunv@node5 conf]# curl http://192.168.122.5 192.168.122.5

三、主Keepalived配置

[iyunv@node6 conf]# vim /etc/keepalived/keepalived.conf ! Configuration File for keepalived global_defs { notification_email { 404060@qq.com 138162@139.com } notification_email_from 404060@qq.com smtp_server 127.0.0.1 smtp_connect_timeout 30 router_id LVS_DEVEL } vrrp_script chk_nginx { script "/etc/keepalived/chk_nginx.keepalived.sh" interval 2 weight 2 } vrrp_instance VI_1 { state MASTER interface eth0 virtual_router_id 51 priority 200 advert_int 1 authentication { auth_type PASS auth_pass kuangling } track_script { chk_nginx.keepalived } virtual_ipaddress { 192.168.122.15 } }

四、备nginx配置

[iyunv@node6 conf]# mkdir -p /var/www/html [iyunv@node6 conf]# cat "192.168.122.6" > /var/www/html/index.html [iyunv@node6 conf]# vim nginx.conf [iyunv@node6 conf]# ../sbin/nginx -s reload [iyunv@node6 conf]# curl http://192.168.122.6 192.168.122.6

五、备keepalived配置

[iyunv@node6 conf]# vim /etc/keepalived/keepalived.conf ! Configuration File for keepalived global_defs { notification_email { 404060@qq.com 138162@139.com } notification_email_from 404060@qq.com smtp_server 127.0.0.1 smtp_connect_timeout 30 router_id LVS_DEVEL } vrrp_script chk_nginx { script "/etc/keepalived/chk_nginx.keepalived.sh" interval 2 weight 2 } vrrp_instance VI_1 { state BACKUP interface eth0 virtual_router_id 51 priority 150 advert_int 1 authentication { auth_type PASS auth_pass kuangling } track_script { chk_nginx.keepalived } virtual_ipaddress { 192.168.122.15 } }

六、分别在2台nginx服务器上添加检测脚本：

[iyunv@node6 conf]# vim /etc/keepalived/chk_nginx.keepalived.sh #!/bin/bash # description: # 定时查看Nginx是否存在，如果不存在则启动Nginx # 如果启动失败，则停止keepalived status=`ps -C nginx --no-header |wc -l` if [ $status -eq 0 ];then /usr/local/nginx/sbin/nginx sleep 3 if [ `ps -C nginx --no-header |wc -l` -eq 0 ];then killall keepalived fi fi [iyunv@node6 conf]#chmod +x /etc/keepalived/chk_nginx.keepalived.sh

七、测试分别在2台nginx上启动nginx和keepalived服务，然后分别用ip a 查看ip

帝王

我在马路边丢了一分钱

水莹儿

勃起不是万能的，但不能勃起却是万万都不能的!

remington_young

走，MM，咱们化蝶去……

llcong

沙发！沙发!

liujjun

自从我变成了狗屎,就再也没有人踩在我头上了。

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关羽五绺长髯，风度翩翩，手提青龙偃月刀，江湖人送绰号——刀郎。