facts: only look up prefixes and VLANs once

Also drop "access-*" hosts from setup playbook as they have all been
renamed to "sw-*".

roles/facts/tasks/main.yml

@@ -1,17 +1,20 @@
 # Make expensive lookups to NetBox once for later reference by any host.
-- name: Lookup networks and prefixes
-  set_fact:
-    vlans: '{{ query("netbox.netbox.nb_lookup", "vlans", api_filter="group=new-net", raw_data=true)
-        | sort(attribute="vid") }}'
-    vrfs: '{{ query("netbox.netbox.nb_lookup", "vrfs", raw_data=true) | list2dict("name") }}'
-    prefixes: '{{ query("netbox.netbox.nb_lookup", "prefixes", raw_data=true)
-        | sort(attribute="prefix") | sort(attribute="family.value") }}'
+- delegate_to: localhost
+  block:
+    - name: Lookup networks and prefixes
+      run_once: true
+      set_fact:
+        vlans: '{{ query("netbox.netbox.nb_lookup", "vlans", api_filter="group=new-net", raw_data=true)
+            | sort(attribute="vid") }}'
+        vrfs: '{{ query("netbox.netbox.nb_lookup", "vrfs", raw_data=true) | list2dict("name") }}'
+        prefixes: '{{ query("netbox.netbox.nb_lookup", "prefixes", raw_data=true)
+            | sort(attribute="prefix") | sort(attribute="family.value") }}'
 
-- name: Select VLAN and BGP prefixes
-  set_fact:
-    vrf_prefixes: '{{ prefixes | selectattr("vrf")
-        | selectattr("vlan") | selectattr("vlan.id", "in", vlans|map(attribute="id"))
-        | sort(attribute="vlan.vid") }}'
-    bgp_prefixes: '{{ prefixes | selectattr("tenant")
-        | selectattr("role") | selectattr("role.slug", "==", "bgp")
-        | sort(attribute="tenant.slug") }}'
+    - name: Select VLAN and BGP prefixes
+      set_fact:
+        vrf_prefixes: '{{ prefixes | selectattr("vrf")
+            | selectattr("vlan") | selectattr("vlan.id", "in", vlans|map(attribute="id"))
+            | sort(attribute="vlan.vid") }}'
+        bgp_prefixes: '{{ prefixes | selectattr("tenant")
+            | selectattr("role") | selectattr("role.slug", "==", "bgp")
+            | sort(attribute="tenant.slug") }}'

setup.yml

@@ -17,7 +17,7 @@
     - exit
 
 # Set up access switches.
-- hosts: access-*, sw-*
+- hosts: sw-*
   gather_facts: false
   roles:
     - access