Load Balancing in NGINX

今天有人問graylog的三個node怎麼做load balance
想到之前玩過haproxy
可是查了一下資料
haproxy不支援UDP的load balance
nginx目前已經有支援了
設定方法如下

udp loadbalance

# Load balance UDP‑based DNS traffic across two servers
stream {
    upstream dns_upstreams {
        server 192.168.1.1:53;
        server 192.168.1.2:53;
    }

    server {
        listen 53 udp;
        proxy_pass dns_upstreams;
        proxy_timeout 1s;
        proxy_responses 1;
        error_log logs/dns.log;
    }
}

=============================================================

tcp load balance

upstream mytest {

server 192.168.2.1 weight=3;

server 192.168.2.2 weight=2;

}



server {

listen       443 ssl;

server_name  my.test.tw;



access_log /var/log/nginx/my.test.tw.access.log main;

error_log /var/log/nginx/my.test.tw.error.log warn;



ssl_certificate my.test.tw.crt;

ssl_certificate_key my.test.tw.key;

ssl_protocols TLSv1 TLSv1.1 TLSv1.2;



location / {

proxy_pass http://mytest;

proxy_set_header   Host    $host;

proxy_set_header   X-Real-IP   $remote_addr;

proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;

}

}

https://blog.dtask.idv.tw/Nginx/2018-07-31/

https://www.nginx.com/blog/announcing-udp-load-balancing/