NGINX ingress controller timing out request after 60s

Because you appear to be using the actual ingress from ngnix.com, you need to use nginx.org/proxy-connect-timeout: "3m" style annotations, as one can see in their example

I am still pretty sure that my debugging trick of kubectl cp-ing the nginx.conf off the controller Pod would have helped you debug that situation on your own, but for sure reading the documentation for your ingress controller will go a long way, too

While this might not matter to you, their latest release is also 1.4.3 so I hope you are on an old version on purpose.

The issue was fixed by provided integer values (in seconds) for these annotations:

nginx.ingress.kubernetes.io/proxy-connect-timeout: "180"
nginx.ingress.kubernetes.io/proxy-read-timeout: "180"
nginx.ingress.kubernetes.io/proxy-send-timeout: "180"

It seems that this variation of the NGINX ingress controller requires such.