nginx負載均衡、長鏈接，默認會使用http1.0鏈接下游服務

1.官網 http://nginx.org/en/docs/http/ngx_http_upstream_module.html http://nginx.org/en/docs/ http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_http_versionhtml 2.參考文檔 https://www.cnblogs.co

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