300字范文 > 如何用tomcat模拟集群要求负载均衡（Nginx）并保持session一致性！

如何用tomcat模拟集群要求负载均衡（Nginx）并保持session一致性！

时间：2023-09-25 05:15:53

有两台服务器（tomcat），nginx配置了这两台服务器，现在需要将用户访问的网址进行登录验证，同一个用户不同的请求都可以进到首页，而不是因为不同的服务器，导致同一用户的请求退回到登陆页。

效果如图：

实现方式

1 基于Redis的Session共享，使用Spring Session

这一步可以查看我这篇文章：

如何保持session一致性

2 两个服务器8080和8081如何实现？

两个tomcat

两个tomcat如何同时启动？

修改其中一个配置文件server.xml，将里面三个端口号都 +1 ，如：

配置代码如下：

<?xml version="1.0" encoding="UTF-8"?><Server port="8006" shutdown="SHUTDOWN"><Listener className="org.apache.catalina.startup.VersionLoggerListener" /><Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" /><Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" /><Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" /><Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" /><GlobalNamingResources><Resource name="UserDatabase" auth="Container"type="org.apache.catalina.UserDatabase"description="User database that can be updated and saved"factory="org.apache.catalina.users.MemoryUserDatabaseFactory"pathname="conf/tomcat-users.xml" /></GlobalNamingResources><Service name="Catalina"><Connector port="8081" protocol="HTTP/1.1"connectionTimeout="20000"redirectPort="8443" /><Connector port="8011" protocol="AJP/1.3" redirectPort="8443" /><Engine name="Catalina" defaultHost="localhost"><Realm className="org.apache.catalina.realm.LockOutRealm"><Realm className="org.apache.catalina.realm.UserDatabaseRealm"resourceName="UserDatabase"/></Realm><Host name="localhost" appBase="webapps"unpackWARs="true" autoDeploy="true"><Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"prefix="localhost_access_log" suffix=".txt"pattern="%h %l %u %t "%r" %s %b" /></Host></Engine></Service></Server>

3 如何使用nginx实现两台服务器的负载均衡

修改nginx配置

配置代码如下：

#user nobody;worker_processes 1;#error_log logs/error.log;#error_log logs/error.log notice;#error_log logs/error.log info;#pid logs/nginx.pid;events {worker_connections 1024;}http {include mime.types;default_type application/octet-stream;#log_format main '$remote_addr - $remote_user [$time_local] "$request" '# '$status $body_bytes_sent "$http_referer" '# '"$http_user_agent" "$http_x_forwarded_for"';#access_log logs/access.log main;sendfile on;#tcp_nopushon;#keepalive_timeout 0;keepalive_timeout 65;#gzip on;upstream lagouServer{server 127.0.0.1:8080;server 127.0.0.1:8081;}server {listen 80;server_name localhost;#charset koi8-r;#access_log logs/host.access.log main;location / {root html;index index.html index.htm;proxy_pass http://lagouServer;}location /favicon.ico {}#error_page 404 /404.html; # redirect server error pages to the static page /50x.html#error_page 500 502 503 504 /50x.html;location = /50x.html {root html;}# proxy the PHP scripts to Apache listening on 127.0.0.1:80##location ~ \.php$ {# proxy_pass http://127.0.0.1;#}# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000##location ~ \.php$ {# root html;# fastcgi_pass 127.0.0.1:9000;# fastcgi_index index.php;# fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;# include fastcgi_params;#}# deny access to .htaccess files, if Apache's document root# concurs with nginx's one##location ~ /\.ht {# deny all;#}}# another virtual host using mix of IP-, name-, and port-based configuration##server {# listen 8000;# listen somename:8080;# server_name somename alias another.alias;# location / {# root html;# index index.html index.htm;# }#}# HTTPS server##server {# listen 443 ssl;# server_name localhost;# ssl_certificatecert.pem;# ssl_certificate_key cert.key;# ssl_session_cache shared:SSL:1m;# ssl_session_timeout 5m;# ssl_ciphers HIGH:!aNULL:!MD5;# ssl_prefer_server_ciphers on;# location / {# root html;# index index.html index.htm;# }#}}

踩抗注意：

tomcat运行的项目要打成war包，将war包放到tomcat的webapps文件夹下即可！

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