Move prometheus to zippy.

services/prometheus.hcl

@@ -10,6 +10,13 @@ job "prometheus" {
   group "monitoring" {
     count = 1
 
+    # Run on primary storage node (zippy) for local disk performance
+    # TODO: move to fractal once it's converted to NixOS (spinning disks OK for time-series data)
+    constraint {
+      attribute = "${meta.storage_role}"
+      value     = "primary"
+    }
+
     network {
       port "http" {
         #host_network = "tailscale"
@@ -37,7 +44,7 @@ job "prometheus" {
         volumes = [
           "local/alerts.yml:/prometheus/alerts.yml",
           "local/prometheus.yml:/prometheus/prometheus.yml",
-          "/data/compute/appdata/prometheus:/opt/prometheus",
+          "/data/services/prometheus:/opt/prometheus",
         ]
       }