nut: Infer role from server name, set commands

Since the "primary" `upsmon` is always (for our purposes) running on the
same host as `upsd`, there's no reason to specify both values.

All systems need a shutdown command; one is not set by default.

The primary system is the only one that should send notifications.

env/prod/nut.cue

@@ -73,7 +73,6 @@ nut: schema.#Nut & {
 #nut_monitor: {
 	#server:   string | *ups_server
 	#username: string
-	#role:     "primary" | *"secondary"
 
 	monitor: [
 		for k, v in nut.ups {
@@ -82,10 +81,19 @@ nut: schema.#Nut & {
 				powervalue: 1
 				username:   #username
 				password:   nut.users[#username].password
-				role:       #role
+				if #server == "localhost" {
+					role: "primary"
+				}
+				if #server != "localhost" {
+					role: "secondary"
+				}
 			}
 		},
 	]
+	shutdowncmd: "systemctl poweroff"
+	if #server == "localhost" {
+		notifycmd: "/usr/local/libexec/nut-notify"
+	}
 	minsupplies: 1
 }
 

host/nut0.pyrocufflink.blue.cue

@@ -9,7 +9,6 @@ nut: prod.nut
 nut: monitor: prod.#nut_monitor & {
 	#server:   "localhost"
 	#username: "upsmon"
-	#role:     "primary"
 }
 
 collectd: prod.collectd