network: Add the network_allow_service_restart parameter

Related to osism/issues#974

Signed-off-by: Christian Berendt <[email protected]>

docs/guides/configuration-guide/commons/network.md

@@ -64,8 +64,8 @@ network_tunnels   | `{}`        | https://netplan.readthedocs.io/en/stable/netpl
 network_vlans     | `{}`        | https://netplan.readthedocs.io/en/stable/netplan-yaml/#properties-for-device-type-vlans
 network_vrfs      | `{}`        | https://netplan.readthedocs.io/en/stable/netplan-yaml/#properties-for-device-type-vrfs
 
-Changes to the configuration are currently not applied utomatically. This is done on
-purpose to enable a manual check in advance. Changes to the network configuration can
+By default changes to the network configuration are not applied automatically. This is done on
+purpose to allow a manual check in advance. Changes to the network configuration can
 be applied either by rebooting or by executing `netplan apply`.
 
 ```
@@ -75,6 +75,13 @@ Working with nodes: testbed-manager.testbed.osism.xyz,testbed-node-[0-2].testbed
 clush> sudo netplan apply
 ```
 
+It is possible to execute the `netplan apply` automatically via a handler when changes are made.
+The parameter `network_allow_service_restart` is used for this.
+
+```yaml title="environments/configuration.yml"
+network_allow_service_restart: true
+```
+
 ### Example
 
 The Netplan documentation contains a large number of example configurations. The following