nginx tomcat cluster configuration to achieve painless service restart tutorial

With the increase in the number of code users, the reliance on high-availability services is increasing day by day. Single-point services cannot avoid the impact of restarts on users, so the following solution is adopted to achieve painless service restarts.

nginx+2tomcat(8080,8081)

Idea: There is only one tomcat for normal service. If it is restarted, start the other one. After the service is normal, execute nginx -s reload, and finally close the tomcat of the previous service.

The shell code is as follows:

nginx_root_path="/usr/local/nginx/"<br>nginx_c/vhost/"<br>tomcat_running_8080_port="8080"<br>tomcat_running_8081_port="8081"<br>tomcat_startup_path="bin/startup.sh"<br>tomcat_ shutdown_path= "bin/shutdown.sh"<br>cnt=`ps -ef|grep "apache-tomcat-6.0.39_${tomcat_running_8080_port}"|wc -l`<br>if [ "${cnt}" == "0" ] ; then<br>stop_tomcat_port = "$ {tomcat_running_8081_port}" <br> start_tomcat_port = "$ {tomcat_running_8080_Port} //www.zuidaima.com:8080/share.htm"<br>else<br>lse_tomcat_port = "$ {tomcat_running_8080_port}"<br> start_tomcat_port="${tomcat_running_8081_port}"<br> mv_start_c> mv_stop_c> url="http://www.zuidaima.com:8081/share.htm"<br>fi<br>echo "start tomcat ${start_tomcat_port}" <br> mv ${mv_start_conf_path}.bak ${mv_start_conf_path}<br>mv ${mv_stop_conf_path} ${mv_stop_conf_path}.bak<br>/usr/local/apache-tomcat-6.0.39_${start_tomcat_port}/${tomcat_startup_path}<br>sleep 40<br>rm share.htm -v<br>curl -v "${url}" -o "share.htm"<br>sleep 10<br>echo "nginx reload"<br>${nginx_root_path}sbin/nginx -s reload<br>sleep 2<br>echo "stop tomcat ${stop_tomcat_port}"<br>/usr/local/apache-tomcat-6.0.39_${stop_tomcat_port}/${tomcat_shutdown_path}<br>sleep 10<br>ps -ef|grep tomcat-6.0.39_${stop_tomcat_port}|awk '{print $2}'|xargs kill<br>

The script is a bit redundant, but there is no problem in realizing the function. You can optimize the code by yourself.

The relevant screenshots are as follows:

The key point is to use nginx’s include directive to load only the required conf files: <br>

include /usr/local/nginx/conf/vhost/*.conf; <br>

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