Nginx+tomcat集群

一、Nginx相关

Nginx分发两台tomcat，主要需要在nginx的nginx.conf中添加如下配置：

 upstream mysite {  
      server 172.29.10.19:8280 weight=5;  
      server 172.29.10.20:8280 weight=5;  
    }

 location /zyk {
           proxy_pass http://mysite;
	   proxy_connect_timeout   1;   
           proxy_send_timeout      1;  
           proxy_read_timeout      1;  

        }

完整的nginx.conf文件如下：

#user  nobody;
worker_processes  4;

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_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    gzip  on;

    client_header_buffer_size    128m;

    upstream mysite {  
      server 172.29.xx.x9:8280 weight=5;  
      server 172.29.xx.x0:8280 weight=5;  
    }  

    server {
        listen       80;
        server_name  172.29.xx.xx;

        charset utf-8;
        #charset koi8-r;

        access_log  logs/host.access.log  main;

        location /zyk {
           proxy_pass http://mysite/zyk;
	   proxy_connect_timeout   1;   
           proxy_send_timeout      1;  
           proxy_read_timeout      1;  

        }


        #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_certificate      cert.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;
    #    }
    #}

}

二、tomcat相关

tomcat集群我使用的是session复制。

1、首先部署两台tomcat服务器，并都启动没有问题

我的两台tomcat服务器分别为：

http://172.29.10.19:8280/zyk/

http://172.29.10.20:8280/zyk/

2、在tomcat的conf\Catalina\localhost目录下建立一个zyk.xml文件（这里的xml文件名字和tomcat下的webapps下的应用名字保持一致），其内容为：
<?xml version="1.0" encoding="UTF-8"?>
<Context docBase="/usr/local/workspaces/npu_fwcms/fwcms/apache-tomcat-7.0.85/webapps/zyk"
privileged="true" antiResourceLocking="false" antiJARLocking="false" distributable="true">
</Context>
3、若是两个tomcat在同一台机器上，则需要将tomcat的启动端口全部改为不同。
4、修改server.xml文件
找到Cluster节点

去掉注释
找到Engine节点，将这个由
<Engine name="Catalina" defaultHost="localhost">
变为
<Engine name="Catalina" defaultHost="localhost" jvmRoute="node1">
其中node1意思为目前这个tomcat的实例名称为node1，另一台机器上则设置为node2
5、在web.xml中加入：
<display-name>session</display-name>
<distributable/>
或者
<distrbutable/>

然后重启两台tomcat会看到如下信息：

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