nginx load balancing

1. http load balancing

upstream backend {

    server 10.10.10.10:80      weight=1;

    server test.com:80         weight=2;

}

server {

    location / {

        proxy_pass http://backend;

    }

}

2. tcp load balancing

stream {

    upstream mysql_read {

        server test1.com:3306           weight=5;

        server test2.com:3306;

        server 10.10.10.11:3306        backup;

    }

    server {

        listen 3306;

        proxy_pass mysql_read;

    }

}

3. load-balacing methods

1) least_conn 접속 (hash/ip_hash등등)

upstream backend {

    least_conn;

    server test1.com;

    server test2.com;

}

2) 접속 제한 (NGINX Plus 기능)

upstream backend {

    zone backends 64k;

    queue 750 timeout=30s;

    server test1.com max_conns=25;

    server test2.com max_conns=15;

}