Updating components

When making an update to an existing deployed component used by an application, Dapr does not update the component automatically unless the HotReload feature gate is enabled. The Dapr sidecar needs to be restarted in order to pick up the latest version of the component. How this is done depends on the hosting environment.

Kubernetes

When running in Kubernetes, the process of updating a component involves two steps:

1. Apply the new component YAML to the desired namespace
2. Unless the HotReload feature gate is enabled, perform a rollout restart operation on your deployments to pick up the latest component

Self Hosted

Unless the HotReload feature gate is enabled, the process of updating a component involves a single step of stopping and restarting the daprd process to pick up the latest component.

Hot Reloading (Preview Feature)

This feature is currently in preview. Hot reloading is enabled by via the HotReload feature gate.

Dapr can be made to “hot reload” components whereby component updates are picked up automatically without the need to restart the Dapr sidecar process or Kubernetes pod. This means creating, updating, or deleting a component manifest will be reflected in the Dapr sidecar during runtime.

All components are supported for hot reloading except for the following types. Any create, update, or deletion of these component types is ignored by the sidecar with a restart required to pick up changes.

• Actor State Stores
• Workflow Backends

深入阅读

• Dapr组件概念
• Reference secrets in component definitions
• Supported state stores
• Supported pub/sub brokers
• Supported secret stores
• 支持的绑定列表
• Set component scopes