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docs, net, service-objects: Add a section for Service lifecycle #969

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12 changes: 12 additions & 0 deletions docs/network/service_objects.md
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Expand Up @@ -178,3 +178,15 @@ Use `vinagre` client to connect your VirtualMachineInstance by using the
public IP and port.

Note that here the external port here (31829) was dynamically allocated.

## Service lifecycle

Service objects may be created explicitly by a user or implicitly
through the `virtctl expose` command.

While creating the service explicitly, it is up to the user to explicitly
clean up the service.
From v1.9 the implicit service creation through `virtctl expose` adds an
[`ownerReference`](https://kubernetes.io/docs/concepts/overview/working-with-objects/owners-dependents/) to the service object, binding the service to the VM/VMI.
As a result, the service will be collected by the k8s garbage-collector once
the referenced object (e.g. VMI) is deleted.