Delay deactivation on silo shutdown

[NicolaAtorino]

We use Orleans in a k8s cluster, and because of this there are cases where the pods are terminated due to external factors, for example cluster packing or cluster update.
We have several grains for which we should delay the deactivation until certain conditions are met, and this would basically mean that once the pod receives the SIGTERM the silo should not shutdown until these grains have completed their work (they have an internal timer).

Using DelayDeactivation() protects me only against deactivations caused by GarbageCollection, but it does not prevent the deactivation of a grain in case of silo shutdown.

basically i am asking for the possibility of doing this :

• when sigterm is sent, the application should not exit and complete the shutdown until all activated grains exit from the OnDeactivateAsync() . However this should allow me to take an arbitrary amount of time (up to a pair of hours) . I tried this, but after a certain period of time the silo shuts down anyway and the OnDeactivateAsync() method does not complete.
• during this time, the silo should not receive new grain activation requests and all new activations should be routed to other silos in the cluster.

p.s. we are using an old version of Orleans, Orleans 3.X .

any help ?