簡單的反向代理

# Define which servers to include in the load balancing scheme. 
# It's best to use the servers' private IPs for better performance and security.

upstream backend {

    ip_hash; 
    server 10.10.10.10 slow_start=30s max_fails=3 fail_timeout=15s;
    server 10.10.10.12 slow_start=30s max_fails=3 fail_timeout=15s;

    # Activates the cache for connections to upstream servers.
    keepalive 20;
}

# This server accepts all traffic to port 80 and passes it to the upstream. 
# Notice that the upstream name and the proxy_pass need to match.

server {
    listen 80; 
    server_name example.com;

    location / {
        proxy_pass http://backend/;
    }
}