bug#49205: Closing Bug#49205: Usually caused by misconfigurations of Nginx

[Felix Lechner via Bug reports for GNU Guix <bug-guix@gnu.org>]

Hi,

I have also seen this error several times. In my experience, it is
almost always caused by a misconfiguration of Nginx.

On my equipment, there is an exception to that rule when Nginx serves
outside connections as a reverse proxy to the local network, i.e.
something like: [1]

(body (list
  "proxy_pass http://lechner-desktop.us-core.com:3011;"
  "proxy_set_header Host $host;"
  "proxy_set_header X-Real-IP $remote_addr;"
  "proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;"))

but that's somewhat exotic. It triggers a "host not found" in the logs.

My particular failure may have to do with the service ordering in
Shepherd, although I have not been able to fix it. For example, the
default prerequisites for Nginx do not even include 'networking. [2]
Either way, Nginx is configured to respawn, so my bug is probably
elsewhere.

Closing this issue.

Kind regards
Felix

[1] https://codeberg.org/lechner/system-config/src/commit/fca07b73068b043d57930266a2102af05b0b0aa9/host/wallace-server/operating-system.scm#L892-L895
[2] https://codeberg.org/lechner/guix/src/commit/f25529b08e356f89ca7cecc44295085531a8faba/gnu/services/web.scm#L567