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How does Nginx handle the request of the upstream server when it is marked as `down`?

April 13, 2015 04:16AM
For a simple Nginx configuration like this:
For a simple Nginx configuration like this:

upstream myservers {
server 127.0.0.1:3000;
server 127.0.0.1:3001;
}
server {
listen 80;
location / {
proxy_pass http://myservers;
}
I have two questions related zero downtime of the application:

If I change the configuration to mark the first server server 127.0.0.1:3000 as down, I assume that no new request will go to that server, but what about the current request that is handled by the upstream server? Does Nginx can still return valid response to end user for that request?

If I remove the first server server 127.0.0.1:3000 and reload the configuration, what about the current request that is handled by this upstream server?
Subject Author Posted

How does Nginx handle the request of the upstream server when it is marked as `down`?

HUMing April 13, 2015 04:16AM

Re: How does Nginx handle the request of the upstream server when it is marked as `down`?

Maxim Dounin April 13, 2015 09:08AM



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