What does the `cardano.node.configPath` setting do?

[jaredponn]

Over here

cardano.nix/modules/node.nix

Lines 26 to 30 in 4cdea76

	configPath = lib.mkOption {
	description = "Path to cardano-node configuration.";
	type = lib.types.path;
	default = "/etc/cardano-node/config.json";
	};

we define the cardano.node.configPath setting, but we see that it isn't used anywhere in the same module. I would expect there to be some code which ensures that the the Cardano node's config gets copied to this location. As it currently stands, it looks like if I change the cardano.node.configPath value, services which assume that the config file is actually at this option value won't find it.

[aciceri]

Sorry for not answering before!
However I think that you are right and this may be a bug.

[brainrake]

A better description would be:
Path where other services expect the config.json of the cardano-node they are connecting to.

If this module is enabled and so cardano-node is running on the local host, this module also makes the config available at the same path which is hardcoded. This is because it can not be at an arbitrary path.

If this module is not enabled, the other modules (namely ogmios and kupo) still use cardano.node.configPath as the default for the config path setting, so it is enough to configure it here. In this case, the config file needs to be made available at some path and that path configured above.

Perhaps it is better to remove this setting entirely, and set ogmios and kupo configPath directly.