nginx upstream 配置及负载均衡算法

蔚落 2023-07-10 08:12 33阅读 0赞

基本配置

http {
        include       mime.types;
        default_type  application/octet-stream;
    
        sendfile        on;
    
        keepalive_timeout  65;
    
    	upstream backend {
    		server localhost:7001 weight=1;
    		server localhost:7002 weight=1;
    	}
    
        server {
            listen       8888;
            server_name  localhost;
    
            location / {
                proxy_pass   http://backend;
            }

失败重试

http {
        include       mime.types;
        default_type  application/octet-stream;
    
        sendfile        on;
    
        keepalive_timeout  65;
    
    	upstream backend {
    		server localhost:7001 max_fails=2 fail_timeout=10s weight=1;
    		server localhost:7002 max_fails=2 fail_timeout=10s weight=1;
    	}
    
        server {
            listen       8888;
            server_name  localhost;
    
            location / {
    			proxy_connect_timeout 5s;
    			proxy_read_timeout 5s;
    			proxy_send_timeout 5s;
    			
    			proxy_next_upstream error timeout;
    			proxy_next_upstream_timeout 10s;
    			proxy_next_upstream_tries 2;
    			
                proxy_pass   http://backend;
    			
    			add_header upstream_addr $upstream_addr;
            }

tcp心跳

upstream backend {
    		server localhost:7001 weight=1;
    		server localhost:7002 weight=1;
    		check interval=3000 rise=1 fall=3 timeout=2000 type=tcp;
    	}

http心跳

upstream backend {
    		server localhost:7001 weight=1;
    		server localhost:7002 weight=1;
    		check interval=3000 rise=1 fall=3 timeout=2000 type=http;
    		check_http_send "HEAD /status HTTP/1.0\r\n\r\n"
    		check_http_expect_alive http_2xx http_3xx;
    	}

域名上游服务器（略）

备份上游服务器

upstream backend {
    		server localhost:7001 weight=1;
    		server localhost:7002 weight=1 backup;
    	}

不可用上游服务器

upstream backend {
    		server localhost:7001 weight=1;
    		server localhost:7002 weight=1 down;
    	}

长连接

upstream backend {
    		server localhost:7001 weight=1;
    		server localhost:7002 weight=1 backup;
    		keepalive 100;
    	}
    
        server {
            listen       8888;
            server_name  localhost;
    
            location / {
    			# 支持keep_alive 
    			# 如果是http/1.0 需要配置发送 Connection "Keep-Alive" 请求头
    			proxy_http_version 1.1;
    			proxy_set_header Connection "";
    			
                proxy_pass   http://backend;
            }