Hello,
I know what the problem is.
The problem is that nginx starts before all network interfaces are upped
up. I looked through all nginx unit files (nginx-common debian package)
and found that all versions, including Ubuntu 22.04, have incorrect
After & Wants.
All versions from the package specify After=network.target, but if you
study this network.target, it does not guarantee that the entire network
on the device is already configured. It is correct to use
network-online.target. Moreover, it is also recommended by the nginx
developers themselves:
https://www.nginx.com/resources/wiki/start/topics/examples/systemd/
As a temporary solution, I recommend doing so until it is fixed in the
package nginx-common itself:
$ sudo systemctl edit nginx.service
To insert there:
[Unit]
After=syslog.target network-online.target remote-fs.target nss-lookup.target
Wants=network-online.target
Best regards, Perlover
