Can relay_ipv4_addr and relay_ipv6_addr be set as an FQDN?

[NagaseYami]

I often switch between multiple VPS providers because some of them offer better deals. This leads to frequent changes in my IP address, and I don't want to modify configuration files or environment variables each time. Of course, I could also try writing a shell script to make a DNS request each time before starting Eturnal and then output the response to environment variable.

[licaon-kter]

this is covered in https://eturnal.net/doc/

[weiss]

I often switch between multiple VPS providers because some of them offer better deals. This leads to frequent changes in my IP address, and I don't want to modify configuration files or environment variables each time.

Can't you just omit the relay_ipv4_addr and relay_ipv6_addr options altogether? eturnal should figure out the correct relay address(es) by default, unless the server is behind NAT or has multiple public addresses (check the startup [info] messages in the eturnal log).

Of course, I could also try writing a shell script to make a DNS request each time before starting Eturnal and then output the response to environment variable.

You could create an /etc/eturnalctl.cfg file such as the following:

export ETURNAL_RELAY_IPV4_ADDR=$(curl -4fsS 'https://ifconfig.co/ip')
export ETURNAL_RELAY_IPV6_ADDR=$(curl -6fsS 'https://ifconfig.co/ip')

(The eturnalctl.cfg file isn't documented so far, but we have no plans to remove support for it.)

[NagaseYami]

unless the server is behind NAT or has multiple public addresses

Yes, I use multiple VPS servers for reverse proxy (port forwarding) in order to conceal the actual IP address of the real server. Therefore, I cannot run the automatic IP detection feature on the real server.

You could create an /etc/eturnalctl.cfg file such as the following:

Thank you very much, this is exactly what I wanted!

[NagaseYami]

In my case, it should be

export ETURNAL_RELAY_IPV4_ADDR=$(dig +short example.com A)
export ETURNAL_RELAY_IPV6_ADDR=$(dig +short example.com AAAA)