Wrong home directory for Prometheus Node Exporter

[mweinelt]

I'm getting the following error all the time on rebuilds and have to disable and reenable the exporter.

The homedir we configure for the user is /var/lib/prometheus-node-exporter, but that seems to also be present at /private/var/lib/prometheus-node-exporter, like a symlink or a bindmount.

error: config contains the wrong home directory for _prometheus-node-exporter, aborting activation
nix-darwin does not support changing the home directory of existing users.

Please set:

    users.users._prometheus-node-exporter.home = "/private/var/lib/prometheus-node-exporter";

or remove it from your configuration.

[Enzime]

/var is a bind mount to /private/var I believe and some users have their home directory set to both /var/lib/x and /private/var/lib/x

The best fix imo is to update the user to only have one home directory, it should be something like dscl . -create /Users/x /var/lib/x

[emilazy]

This is a user created by our own module so it doesn’t seem like that should happen or that manual intervention should be required. (FWIW it’s a symlink, /var@ -> private/var.)

[mweinelt]

nix-darwin/modules/services/monitoring/prometheus-node-exporter.nix

Line 84 in ba9b317

home = "/var/lib/prometheus-node-exporter";