debian: get inventory data from netbox

Set standardized interface names (mgmt0… for L2 management interfaces
and lan0… for L3 data interfaces speaking BGP). ASN is stored as a
custom field in netbox but that might change.

roles/debian/templates/fabric.intf.j2

@@ -1,6 +1,6 @@
-{% for iface in ifaces_fabric %}
-auto {{ iface }}
-iface {{ iface }}
+{% for iface in hostvars[inventory_hostname].interfaces | selectattr('name', 'match', '^lan') %}
+auto {{ iface.name }}
+iface {{ iface.name }}
     mtu 9216
 
 {% endfor %}

roles/debian/templates/frr.conf.j2

@@ -2,16 +2,16 @@ frr defaults datacenter
 service integrated-vtysh-config
 log syslog
 
-router bgp {{ asn }}
+router bgp {{ hostvars[inventory_hostname].custom_fields.asn.asn }}
   bgp bestpath as-path multipath-relax
 
   neighbor fabric peer-group
   neighbor fabric remote-as external
   neighbor fabric capability extended-nexthop
 
-{% for iface in ifaces_fabric %}
-  neighbor {{ iface }} interface peer-group fabric
-  neighbor {{ iface }} bfd
+{% for iface in hostvars[inventory_hostname].interfaces | selectattr('name', 'match', '^lan') %}
+  neighbor {{ iface.name }} interface peer-group fabric
+  neighbor {{ iface.name }} bfd
 {% endfor %}
 
   address-family ipv4 unicast

roles/debian/templates/interfaces.j2

@@ -7,8 +7,16 @@ iface mgmt
     address ::1/128
     vrf-table auto
 
-auto {{ iface_mgmt }}
-iface {{ iface_mgmt }}
+{% for iface in hostvars[inventory_hostname].interfaces | selectattr('name', 'match', '^mgmt') | selectattr('ip_addresses') %}
+auto {{ iface.name }}
+iface {{ iface.name }}
     vrf mgmt
-    address {{ ansible_host }}/{{ mgmt_gw | ipaddr('prefix') }}
-    gateway {{ mgmt_gw | ipaddr('address') }}
+{% for ip in iface.ip_addresses %}
+    address {{ ip.address }}
+{% set gw = query('netbox.netbox.nb_lookup', 'ip-addresses', api_filter=('tag=gateway parent=' + ip.address))|first %}
+{% if gw is defined %}
+    gateway {{ gw.value.address | ipaddr('address') }}
+{% endif %}
+{% endfor %}
+
+{% endfor %}

roles/debian/templates/loopback.intf.j2

@@ -1,3 +1,6 @@
+{% set iface_lo = hostvars[inventory_hostname].interfaces | selectattr('name', 'equalto', 'lo') | first %}
 auto lo
 iface lo inet loopback
-    address {{ router_id }}/32
+{% for ip in iface_lo.ip_addresses %}
+    address {{ ip.address }}
+{% endfor %}