Nginx+tomcat to realize load balancing _nginx

Implementation of load Balancing configuration
1. Reverse Proxy

2, implementation agent (192.168.1.161 Agent to 192.168.1.62)

Worker_processes 1;
events{
    worker_connections 1024;
}
http{
    include mine.types;
    Default_type Application/octet-stream;
    Senfile on;
    Keepalive_timeout;

    server{
        Listen;
        server_name locahost;
        Location/{
            #root html;
            Index index.html index.htm;
            Proxy_pass http://192.168.1.62:8080; # Agent to http://192.168.1.62:8080
        }

        error_page 502 503 504/50x.html;
        Location =/50x.html {
            root html;
        }

}} Restart Nginx:./nginx-s Reload

Second, the processing strategy of session during load balancing
1. Achieve Basic load Balancing

# Set up the server group, the policy is the default policy, the average polling (1) upstream Tomcats {server 192.168.1.62:8080;
Server 192.168.1.63:8080;
    # Set up the server group, the policy is Ip_hash policy, the user is locked to a server (2) upstream Tomcats {ip_hash;
    Server 192.168.1.62:8080;
Server 192.168.1.63:8080;
    # Configure server group information for load Balancing (5) Upstream backends{server 192.168.1.62:8080 backup;

    Server 192.168.1.63;

    # Weight: Weight, the higher the value the larger the load (by weight decision polling) # server 192.168.1.4 weight=5;

    # Backup: back-up machine, only if not the backup machine is dead to enable; server 192.168.1.4 backup; 

    # Down: Stop sign, will not be accessed, mainly for temporary downtime maintenance server 192.168.1.65 down;
# Max_fails: To the specified number of times that the server hangs up # Fail_timeout: How long before you hang up to test if the server 192.168.1.66 max_fails=2 fail_timeout=60s has been restored;
} worker_processes 1;
    events{worker_connections 1024; http{include mine.types;
    Default_type Application/octet-stream;
    Senfile on;

    Keepalive_timeout 65;
        server{Listen 80;
        server_name locahost;
            Location/{#root html;
            Index index.html index.htm; ProXy_pass Http://tomcats;
        # Send current access to server group} Error_page 502 503 504/50x.html;
        Location =/50x.html {root html; }
    }
}

Each time you refresh, the server being proxied is different, the default average polling. The balance strategy includes
(1) None polling, weight determined by weight
(2) Ip_hash, a user bound to a server
(3) Fair strategy, according to the speed of the server response dynamic allocation, response fast load
(4) Url_hash,url binding on a server

Three, the problem that the application code should pay attention to in the cluster environment