linux – 根据流量或请求的百分比负载均衡HTTP？

# I like starTing my upstream names with _
# so they're not confused with hostnames
upstream _old_upstream {
  server 127.0.0.1:1234;
}

upstream _new_upstream {
  server 127.0.0.1:4321;
}

# Make sure the values here match the names of the upstream blocks above
split_clients $remote_addr $split_upstream {
   10% _new_upstream;
   -   _old_upstream;
}

server {
  LOCATIOn / {
    # EDIT: I forgot,when using variables in a proxy_pass,you have to
    # specify the entire request
    proxy_pass @R_673_10107@://$split_upstream$request_uri;
  }
}

然后,当您想要将更多流量移动到新服务器时,只需更改百分比并运行Nginx -s reload.