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Nginx upstream健康检查：后端挂了自动踢出局_我的网站

一 |     

　    一键部署OpenClaw        

单台后端出问题时，如果Nginx还继续把请求发过去，用户看到的不是502就是超时。upstream配置里的max_fails和fail_timeout可以让Nginx自动把失败节点暂时下线，保证正常请求不受影响。

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这是被动健康检查，不需要商业模块。Nginx在指定时间内检测到多次失败，就把节点标记为不可用，等fail_timeout过后再尝试恢复。    

upstream backend {
 server 192.168.1.11:8080 weight=5 max_fails=3 fail_timeout=30s;
 server 192.168.1.12:8080 weight=5 max_fails=3 fail_timeout=30s;
 server 192.168.1.13:8080 backup;
}
 
server {
 location / {
 proxy_pass http://backend;
 proxy_next_upstream error timeout http_500 http_502 http_503;
 proxy_connect_timeout 5s;
 }
}

proxy_next_upstream很关键，它告诉Nginx在什么情况下把请求换一台后端重试。    As we mark the 101st birth anniversary of Raj Kapoor, it feels like the perfect moment to look back at one of the most memorable chapters in Filmfare history, a night that celebrated the artistry, emotion, and timeless appeal of the showman of Indian cinema. Let’s travel back to May 1961, when the 9th Filmfare Awards unfolded as a landmark evening. Raj Kapoor was honoured with the Filmfare Best Actor award for his unforgettable performance in Jis Desh Mein Ganga Behti Hai, a role that beautifully captured his deep-rooted connection with Indian culture and storytelling.                was awarded the Filmfare Best Actor for his spectacular performance in Jis Desh Men Ganga Behti Hai at the 9th Filmfare awards. ❤️Witness the magic once again as we return to Gujarat for the… pic.twitter.com/9C1AXn6S3s     — Filmfare (@filmfare) September 14, 2025                    That year, Raj Kapoor took home the Best Actor trophy for Jis Desh Mein Ganga Behti Hai. The film led the night with 10 nominations, followed closely by Gunga Jumna with 7. Interestingly, though released in 1960, Jis Desh Mein Ganga Behti Hai was not considered for the 8th edition but went on to dominate the 4th Filmfare Awards with 4 wins, including Best Film and Best Actor.     Another highlight from the evening was Shubha Khote’s double nomination in the Best Supporting Actress category for her roles in Gharana and Sasural. However, the award eventually went to Nirupa Roy for her powerful performance in Chhaya.                                                                 View this post on Instagram          A post shared by Filmfare (@filmfare)                         From legends like Dilip Kumar, Raj Kapoor, and Nargis in the early decades to the unmatched charisma of Amitabh Bachchan, Rekha, and Rishi Kapoor, every generation has left a timeless stamp on the Filmfare stage. More recently, Shah Rukh Khan’s witty hosting, Salman Khan’s high-energy acts, Aishwarya Rai Bachchan’s poise, Deepika Padukone’s elegance, Priyanka Chopra’s dynamism, and Ranveer Singh’s infectious energy have kept the magic alive.Also Read: Filmfare Flashback: Looking Back at Dilip Kumar and Nutan’s Wins for Devdas and Seema。但只建议对幂等请求开启GET/HEAD重试，POST请求重复提交可能带来业务风险。    

如果有条件，建议用Nginx Plus的主动健康检查模块，会周期性向后端发探测请求，比被动检测更早发现问题。免费版用被动方案也基本够用了。    数据来源：Nginx官方文档 ngx_http_upstream_module（max_fails / fail_timeout / proxy_next_upstream）

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Published on:21:53:58