container: Set network ip range when using a static container ip

roles/container/tasks/main.yaml

@@ -15,11 +15,8 @@
     name: network
   vars:
     network_name: "{{ network }}"
-    network_subnet: >-
-      {{
-        container_ip | ansible.utils.ipsubnet(24)
-        if (container_ip | length > 0 and network_index == 0) else ''
-      }}
+    network_subnet: "{{ _container_network_subnet if network_index == 0 else '' }}"
+    network_range: "{{ _container_network_range if network_index == 0 else '' }}"
   when: network_created_networks is not defined or network not in network_created_networks
   loop: "{{ container_networks }}"
   loop_control:

roles/container/vars/main.yaml

@@ -11,6 +11,22 @@ _container_networks_with_ip: >-
     ]
     + _container_networks[1:]
   }}
+_container_network_subnet: >-
+  {{ container_ip | ansible.utils.ipsubnet(24) if container_ip | length > 0 else '' }}
+_container_network_subnet_ranges: >-
+  {{
+    [
+      _container_network_subnet | ansible.utils.ipsubnet(25, 0),
+      _container_network_subnet | ansible.utils.ipsubnet(25, 1)
+    ] if container_ip | length > 0 else ''
+  }}
+_container_network_range: >-
+  {{
+    _container_network_subnet_ranges |
+      reject('ansible.utils.supernet_of', container_ip) |
+      first
+    if container_ip | length > 0 else ''
+  }}
 
 _container_volumes: "{{ container_mounts | selectattr('type', '==', 'volume') }}"