代码下载地址:http://www.zuidaima.com/share/1860227690056704.htm
随着最代码用户量的增大,对高可用服务的依赖度日益增强,单点的服务无法避免重启给用户带来的影响,所以采用了如下方案来实现无痛重启服务。
nginx+2tomcat(8080,8081)
思路:其中正常服务的tomcat只有1个,如果重启时,启动另外一个,服务正常后,执行nginx -s reload,最后在关闭上一个服务的tomcat。
shell代码如下:
nginx_root_path="/usr/local/nginx/" nginx_conf_path="${nginx_root_path}conf/vhost/" tomcat_running_8080_port="8080" tomcat_running_8081_port="8081" tomcat_startup_path="bin/startup.sh" tomcat_shutdown_path="bin/shutdown.sh" cnt=`ps -ef|grep "apache-tomcat-6.0.39_${tomcat_running_8080_port}"|wc -l` if [ "${cnt}" == "0" ] ;then stop_tomcat_port="${tomcat_running_8081_port}" start_tomcat_port="${tomcat_running_8080_port}" mv_start_conf_path="${nginx_conf_path}www.zuidaima.com_8080.conf" mv_stop_conf_path="${nginx_conf_path}www.zuidaima.com_8081.conf" url="http://www.zuidaima.com:8080/share.htm" else stop_tomcat_port="${tomcat_running_8080_port}" start_tomcat_port="${tomcat_running_8081_port}" mv_start_conf_path="${nginx_conf_path}www.zuidaima.com_8081.conf" mv_stop_conf_path="${nginx_conf_path}www.zuidaima.com_8080.conf" url="http://www.zuidaima.com:8081/share.htm" fi echo "start tomcat ${start_tomcat_port}" mv ${mv_start_conf_path}.bak ${mv_start_conf_path} mv ${mv_stop_conf_path} ${mv_stop_conf_path}.bak /usr/local/apache-tomcat-6.0.39_${start_tomcat_port}/${tomcat_startup_path} sleep 40 rm share.htm -v curl -v "${url}" -o "share.htm" sleep 10 echo "nginx reload" ${nginx_root_path}sbin/nginx -s reload sleep 2 echo "stop tomcat ${stop_tomcat_port}" /usr/local/apache-tomcat-6.0.39_${stop_tomcat_port}/${tomcat_shutdown_path} sleep 10 ps -ef|grep tomcat-6.0.39_${stop_tomcat_port}|awk '{print $2}'|xargs kill
脚本有些冗余,但实现功能没问题了,大家可以自行发挥优化下代码。
相关截图如下:
关键点在利用了nginx的include指令实现只加载需要的conf文件:
include /usr/local/nginx/conf/vhost/*.conf;