I've configured nginx as a reverse proxy for downloading software artifacts (e.g. JAR files) and want to speed it up by proxying each request to multiple upstream servers in parallel.
The following currently works: with nginx running at localhost:8080, I request localhost:8080/com/foo/bar.jar, nginx checks serially for the file com/foo/bar.jar at each host in a pre-configured list (e.g. repo1.org/com/foo/bar.jar, repo2.org/com/foo/bar.jar, etc.), and returns the first matching artifact (i.e. first to return status 200).
The config below makes this work for repos at maven.org and osgeo.org:
events {}
http {
server {
listen 8000;
location / {
proxy_pass https://repo1.maven.org/maven2/;
}
}
server {
listen 8001;
location / {
proxy_pass https://repo.osgeo.org/repository/release/;
}
}
upstream repositories {
server localhost:8000;
server localhost:8001;
}
server {
location / {
proxy_next_upstream error timeout http_404;
proxy_pass http://repositories;
}
}
}
To decrease latency, I'd like for nginx to run the requests in parallel, return the first one that gives a 200, and otherwise return error code 404.
I'm not sure which directives (if any) can enable this kind of behavior. I appreciate any tips.
