nginx tomcat集群配置实现无痛重启服务教程

╰半橙微兮° 2022-08-23 13:58 122阅读 0赞

代码下载地址：[http://www.zuidaima.com/share/1860227690056704.htm][http_www.zuidaima.com_share_1860227690056704.htm]

原文：[nginx tomcat集群配置实现无痛重启服务教程][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。