Select IP of resulting machine

[typetetris]

Can I somehow select the IP a machine will have later?

networking.privateIPv4 seems to have no effect.

[sorki]

This used to work by means of nixops filling networking.extraHosts so you could refer to other hosts in the network by their names.

Currently the output is just

networking = {
        extraHosts = "\n";
};

due to hosts in https://github.com/NixOS/nixops/blob/master/nixops/deployment.py#L655 not being populated, the function that should do this creates empty dict at https://github.com/NixOS/nixops/blob/master/nixops/deployment.py#L713

I don't get how this is supposed to work with the new plugin system - should nixops-libvirtd somehow provide IPs from its state?

Also I think that networking.privateIPv4 has no effect at all when looking at impl and it seems to be ignored even for guest IP queries (and for VM image creation).

This was quite useful feature of older nixops, which allowed to toy with clustered setups without any IPs or DNS servers.