Nginx绑定IP,解决session共享

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1.Nginx通过负载均衡IP地址固定绑定，解决Session共享
upstream note.java.itcast.cn{
ip_hash;
server localhost:8080 weight=1;
server localhost:8081 weight=1;
}

server {
listen 80;
server_name note.java.itcast.cn;

#charset koi8-r;

#access_log logs/host.access.log main;

location / {

proxy_pass http://note.java.itcast.cn;
index index.html index.htm;

}
}

只需要在 upstream添加一个 ip_hash;属性,

相同的请求就会一直请求第一次绑定的这个IP

实现方式

新建一个servlet用于接收请求

@WebServlet("/NginxSessionServlet")

public class NginxSessionServlet extends HttpServlet {

    @Override

    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        System.out.println("当前请求端口:"+req.getLocalPort());

        String action=req.getParameter("action");

        //向Session中存放一个数据

        if(action.equals("setSession")){

            req.getSession().setAttribute("username","zhangsan");

        }else if(action.equals("getSession")){

            resp.getWriter().write((String)req.getSession().getAttribute("username"));

        }

    }

    @Override

    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        doPost(req, resp);

    }

实现效果

无论访问多少次,都只会请求8080端口