All hosts streaming their logs to the monitoring node need to know that host

morph/lib/base.nix

@@ -57,6 +57,11 @@
     # qualified domain name.
     deployment.targetHost = config.networking.fqdn;
 
+    networking.hosts = {
+      # To stream logs to the monitoring host, all nodes need to know its address
+      "172.23.23.1" = [ "monitoring" "monitoring.monitoringvpn" ];
+    };
+
     assertions = [
       # This is a check to save somebody in the future trying to debug why
       # setting `nixpkgs.config` is not having an effect.