Keepaliev Nginx http

建站服务器
ngxin作为一个强大的开源软件是可以先做为高可用集群服务的，这篇博文就介绍一下nginx keepalived是如何实现高性能 高可用集群服务的
环境介绍：
硬件： 4台虚拟服务器
系统：centos 7.3
软件：keepalived、apache、nginx
ip及主机名
master
主机名：shiyan1
ip地址：172.18.17.31
backup
主机名：shiyan2
ip地址：172.18.17.32
httpd1
主机名：shiyan3
ip地址：172.18.17.33
httpd2
主机名：shiyan4
ip地址：172.18.17.34
四台服务器初始化配置(四台服务器相同的配置)
关闭防火墙
[root@shiyan~]#systemctldisablefirewalld[root@shiyan~]#systemctlstopfirewalld[root@shiyan~]#iptables–f
关闭selinux
[root@shiyan~]#vim/etc/selinux/configselinux=disabled#保存重启系统生效
安装软件
master/backup
[root@shiyan~]#yuminstallkeepalivedhttpdnginx#(nginx需要单独配置epel源) httpd1/httpd2
[root@shiyan~]#yuminstallhttpd
httpd1配置
[root@shiyan3~]#mkdir-p/app/apache/html/[root@shiyan3~]#chown-rapache.apache/app/apache/html/[root@shiyan3~]#echoapacheserver1>/app/apache/html/index.html[root@shiyan3~]#vim/etc/httpd/conf/httpd.conf#此处是更改httpd.conf中的内容，并非添加内容documentroot/app/apache/html#更改为自定义的路径##relaxaccesstocontentwithin/var/www.#<directory/app/apache>#更改为自定义的路径allowoverridenone#allowopenaccess:requireallgranted</directory>#furtherrelaxaccesstothedefaultdocumentroot:<directory/app/apache/html>#更改为自定义的路径.[root@shiyan3~]#systemctlrestarthttpd#测试网站是否正常运行[root@yum~]#curlhttp://172.18.17.33apacheserver1#测试成功
httpd2配置
[root@shiyan4~]#mkdir-p/app/apache/html/[root@shiyan4~]#chown-rapache.apache/app/apache/html/[root@shiyan4~]#echoapacheserver2>/app/apache/html/index.html[root@shiyan4~]#vim/etc/httpd/conf/httpd.conf#此处是更改httpd.conf中的内容，并非添加内容documentroot/app/apache/html#更改为自定义的路径##relaxaccesstocontentwithin/var/www.#<directory/app/apache>#更改为自定义的路径allowoverridenone#allowopenaccess:requireallgranted</directory>#furtherrelaxaccesstothedefaultdocumentroot:<directory/app/apache/html>#更改为自定义的路径.[root@shiyan4~]#systemctlrestarthttpd#测试网站是否正常运行[root@yum~]#curlhttp://172.18.17.34apacheserver2#测试成功
master配置
配置sorry-server[root@shiyan1~]#mkdir-p/app/apache/html/[root@shiyan1~]#chown-rapache.apache/app/apache/html/[root@shiyan1~]#echo<h2>sorryserver1</h2>>/app/apache/html/index.html[root@shiyan1~]#vim/etc/httpd/conf/httpd.conf#此处是更改httpd.conf中的内容，并非添加内容listen8080documentroot/app/apache/html#更改为自定义的路径##relaxaccesstocontentwithin/var/www.#<directory/app/apache>#更改为自定义的路径allowoverridenone#allowopenaccess:requireallgranted</directory>#furtherrelaxaccesstothedefaultdocumentroot:<directory/app/apache/html>#更改为自定义的路径.[root@shiyan1~]#systemctlrestarthttp#测试网站是否正常运行[root@yum~]#curlhttp://172.18.17.31:8080<h2>sorryserver1</h2>#测试成功配置keepalived[root@shiyan1~]#cp/etc/keepalived/keepalived.conf{,.bak}#备份文件[root@shiyan1~]#vim/etc/keepalived/keepalived.confglobal_defs{notification_email{root#定义收邮件的用户}notification_email_fromalexandre.cassen@firewall.locsmtp_server172.18.17.31#定义邮件地址smtp_connect_timeout30router_idnode1#定义节点名称}vrrp_instancevi_1{statemaster#定义节点为主节点模式interfaceens33#定义使用ens33为vip网卡virtual_router_id51#定义节点编号priority150#定义优先级advert_int1authentication{auth_typepassauth_pass1111}virtual_ipaddress{172.18.17.30#定义vip}}~配置nginx服务[root@shiyan1~]#vim/etc/nginx/nginx.conf#添加nginx集群upstreamwebsrvs{server172.18.17.33:80;server172.18.17.34:80;server127.0.0.1:8080backup;}#server部分的内容需要全部注释掉[root@shiyan1~]#vim/etc/nginx/conf.d/default.confserver{listen80;location/{roothtml;proxy_passhttp://websrvs;indexindex.htmlindex.htm;}}[root@shiyan1~]#systemctlrestartnginx[root@shiyan1~]#systemctlrestartkeepalived[root@shiyan1~]#systemctlrestarthttpd
backup配置
配置sorry-server[root@shiyan2~]#mkdir-p/app/apache/html/[root@shiyan2~]#chown-rapache.apache/app/apache/html/[root@shiyan2~]#echo<h2>sorryserver2</h2>>/app/apache/html/index.html[root@shiyan2~]#vim/etc/httpd/conf/httpd.conf#此处是更改httpd.conf中的内容，并非添加内容listen8080documentroot/app/apache/html#更改为自定义的路径##relaxaccesstocontentwithin/var/www.#<directory/app/apache>#更改为自定义的路径allowoverridenone#a

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