Preview features

Preview features in Dapr are considered experimental when they are first released.

Runtime preview features require explicit opt-in in order to be used. The runtime opt-in is specified in a preview setting feature in Dapr’s application configuration. See How-To: Enable preview features for more information.

For CLI there is no explicit opt-in, just the version that this was first made available.

Current preview features

Feature	Description	Setting	Documentation	Version introduced
Pluggable components	Allows creating self-hosted gRPC-based components written in any language that supports gRPC. The following component APIs are supported: State stores, Pub/sub, Bindings	N/A	Pluggable components concept	v1.9
Multi-App Run for Kubernetes	Configure multiple Dapr applications from a single configuration file and run from a single command on Kubernetes	dapr run -k -f	Multi-App Run	v1.12
Workflows	Author workflows as code to automate and orchestrate tasks within your application, like messaging, state management, and failure handling	N/A	Workflows concept	v1.10
Cryptography	Encrypt or decrypt data without having to manage secrets keys	N/A	Cryptography concept	v1.11
Actor State TTL	Allow actors to save records to state stores with Time To Live (TTL) set to automatically clean up old data. In its current implementation, actor state with TTL may not be reflected correctly by clients, read Actor State Transactions for more information.	ActorStateTTL	Actor State Transactions	v1.11
Component Hot Reloading	Allows for Dapr-loaded components to be “hot reloaded”. A component spec is reloaded when it is created/updated/deleted in Kubernetes or on file when running in self-hosted mode. Ignores changes to actor state stores and workflow backends.	HotReload	Hot Reloading	v1.13
Subscription Hot Reloading	Allows for declarative subscriptions to be “hot reloaded”. A subscription is reloaded either when it is created/updated/deleted in Kubernetes, or on file in self-hosted mode. In-flight messages are unaffected when reloading.	HotReload	Hot Reloading	v1.14
Scheduler Actor Reminders	Whilst the Scheduler service is deployed by default, Scheduler actor reminders (actor reminders stored in the Scheduler control plane service as opposed to the Placement control plane service actor reminder system) are enabled through a preview feature and needs a feature flag.	SchedulerReminders	Scheduler actor reminders	v1.14