feat: Add migration of IPv4-only to Dual Stack

Author: davidrapan

supervisor/docker/network.py

@@ -77,20 +77,24 @@ def observer(self) -> IPv4Address:
     def _get_network(self) -> docker.models.networks.Network:
         """Get supervisor network."""
         try:
-            return self.docker.networks.get(DOCKER_NETWORK)
+            if (network := self.docker.networks.get(DOCKER_NETWORK))["EnableIPv6"]:
+                return network
+            network.remove()
+            _LOGGER.info("Migrating Supervisor network to IPv4/IPv6 Dual Stack")
         except docker.errors.NotFound:
             _LOGGER.info("Can't find Supervisor network, creating a new network")
 
-        ip6am_pool = docker.types.IPAMPool(subnet=str(DOCKER_IPV6_NETWORK_MASK))
-
-        ip4am_pool = docker.types.IPAMPool(
-            subnet=str(DOCKER_IPV4_NETWORK_MASK),
-            gateway=str(self.gateway),
-            iprange=str(DOCKER_IPV4_NETWORK_RANGE),
+        ipam_config = docker.types.IPAMConfig(
+            pool_configs=[
+                docker.types.IPAMPool(subnet=str(DOCKER_IPV6_NETWORK_MASK)),
+                docker.types.IPAMPool(
+                    subnet=str(DOCKER_IPV4_NETWORK_MASK),
+                    gateway=str(self.gateway),
+                    iprange=str(DOCKER_IPV4_NETWORK_RANGE),
+                ),
+            ]
         )
 
-        ipam_config = docker.types.IPAMConfig(pool_configs=[ip6am_pool, ip4am_pool])
-
         return self.docker.networks.create(
             DOCKER_NETWORK,
             driver="bridge",