extract dhcp-failover.conf into separate file

roles/isc-dhcp-server/tasks/main.yml

@@ -15,7 +15,15 @@
     dest: /etc/default/isc-dhcp-server
     mode: 0644
 
-- name: Configure isc-dhcp-server
+
+- name: Configure dhcp-failover.conf
+  template:
+    src: dhcp/dhcp-failover.conf.j2
+    dest: /etc/dhcp/dhcp-failover.conf
+    mode: 0600
+  when: dhcp_failover is defined
+
+- name: Configure dhcpd.conf
   template:
     src: dhcp/dhcpd.conf.j2
     dest: /etc/dhcp/dhcpd.conf

roles/isc-dhcp-server/templates/dhcp/dhcp-failover.conf.j2

@@ -0,0 +1,31 @@
+failover peer "dhcp-failover" {
+{% if inventory_hostname == dhcp_failover.primary_host %}
+                primary;
+
+                # MCLT = Maximum Client Lead Time.
+                # Must be specified on the primary, forbidden on the secondary.
+                mclt 3600;
+
+                # Address or DNS name on which this node listens for connections
+                # from its failover peer.
+                address {{ dhcp_failover.primary_host }};
+                peer address {{ dhcp_failover.secondary_host }};
+
+                # Load balancing.
+                split 128;
+{% endif %}
+{% if inventory_hostname == dhcp_failover.secondary_host %}
+                secondary;
+                # Address and peer address are reversed on the secondary node.
+                address {{ dhcp_failover.secondary_host }};
+                peer address {{ dhcp_failover.primary_host }};
+{% endif %}
+
+                # The following options can be shared between primary and
+                # secondary failover peers.
+                port 647;
+                peer port 647;
+                max-response-delay 30;
+                max-unacked-updates 10;
+                load balance max seconds 3;
+}

roles/isc-dhcp-server/templates/dhcp/dhcpd.conf.j2

@@ -30,40 +30,8 @@ authoritative;
 
 # TODO: move this failover peer declaration to a separate file and include it.
 {% if dhcp_failover is defined %}
-failover peer "dhcp-failover" {
+include "/etc/dhcp/dhcp-failover.conf";
-{% if inventory_hostname == dhcp_failover.primary_host %}
-                primary;
-
-                # MCLT = Maximum Client Lead Time.
-                # Must be specified on the primary, forbidden on the secondary.
-                mclt 3600;
-
-                # Address or DNS name on which this node listens for connections
-                # from its failover peer.
-                address {{ dhcp_failover.primary_host }};
-                peer address {{ dhcp_failover.secondary_host }};
-
-                # Load balancing.
-                split 128;
 {% endif %}
-{% if inventory_hostname == dhcp_failover.secondary_host %}
-                secondary;
-                # Address and peer address are reversed on the secondary node.
-                address {{ dhcp_failover.secondary_host }};
-                peer address {{ dhcp_failover.primary_host }};
-{% endif %}
-
-                # The following options can be shared between primary and
-                # secondary failover peers.
-                port 647;
-                peer port 647;
-                max-response-delay 30;
-                max-unacked-updates 10;
-                load balance max seconds 3;
-          }
-{% endif %}
-
-
 
 # Bornes WiFi
 subnet 10.{{ subnet_ids.ap }}.0.0 netmask 255.255.0.0 {