Set up Dapr resources in the AppHost

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⭐ Community Toolkit

This article is the AppHost API reference for the 📦 CommunityToolkit.Aspire.Hosting.Dapr package. If you’re new to the integration, start with Get started with Dapr and Aspire. For app-side endpoint variables and SDK examples, see Connect Aspire apps to Dapr sidecars.

aspire add CommunityToolkit.Aspire.Hosting.Dapr

Or add the package manually:

#:package CommunityToolkit.Aspire.Hosting.Dapr@*

<PackageReference Include="CommunityToolkit.Aspire.Hosting.Dapr" Version="*" />

aspire add CommunityToolkit.Aspire.Hosting.Dapr

This adds the package to aspire.config.json. After aspire restore, .aspire/modules/aspire.mjs includes the Dapr APIs.

Learn more about aspire add and aspire restore.

Add a sidecar and component resources

Add Dapr, create state-store and pub/sub component resources, then reference the components from a sidecar:

C#
TypeScript

var builder = DistributedApplication.CreateBuilder(args);

builder.AddDapr();

var stateStore = builder.AddDaprStateStore("statestore");
var pubSub = builder.AddDaprPubSub("pubsub");

builder.AddProject<Projects.Api>("api")
    .WithDaprSidecar(sidecar => sidecar
        .WithReference(stateStore)
        .WithReference(pubSub));

builder.Build().Run();

import { createBuilder } from './.aspire/modules/aspire.mjs';

const builder = await createBuilder();

await builder.addDapr();

const stateStore = builder.addDaprStateStore('statestore');
const pubSub = builder.addDaprPubSub('pubsub');

await builder
  .addContainer('api', 'nginx')
  .withEndpoint({ name: 'http', scheme: 'http', targetPort: 80 })
  .configureDaprSidecar(async (sidecar) => {
    await sidecar.withOptions({
      appId: 'api',
      appPort: 80,
      appProtocol: 'http',
    });
    await sidecar.withReference(await stateStore);
    await sidecar.withReference(await pubSub);
  });

await builder.build().run();

AddDaprStateStore and AddDaprPubSub create generic component resources. Use the generic component API when you need another Dapr component type:

C#
TypeScript

var builder = DistributedApplication.CreateBuilder(args);

var binding = builder.AddDaprComponent(
    "outbound",
    "bindings.http");

builder.Build().Run();

import { createBuilder } from './.aspire/modules/aspire.mjs';

const builder = await createBuilder();

const binding = builder.addDaprComponent('outbound', 'bindings.http');

await builder.build().run();

Configure sidecar options

Use DaprSidecarOptions or its TypeScript equivalent to configure the app ID, app endpoint, Dapr endpoints, health probes, logging, metrics, component paths, and other dapr run settings:

C#
TypeScript

using CommunityToolkit.Aspire.Hosting.Dapr;

var builder = DistributedApplication.CreateBuilder(args);

builder.AddProject<Projects.Api>("api")
    .WithDaprSidecar(new DaprSidecarOptions
    {
        AppId = "catalog-api",
        AppPort = 8080,
        AppProtocol = "http",
        EnableApiLogging = true,
        ResourcesPaths = ["./components"]
    });

builder.Build().Run();

import { createBuilder } from './.aspire/modules/aspire.mjs';

const builder = await createBuilder();

await builder
  .addContainer('api', 'nginx')
  .withEndpoint({ name: 'http', scheme: 'http', targetPort: 80 })
  .withDaprSidecar({
    sidecarOptions: {
      appId: 'catalog-api',
      appPort: 80,
      appProtocol: 'http',
      enableApiLogging: true,
      resourcesPaths: ['./components'],
    },
  });

await builder.build().run();

Configure component metadata

Use WithMetadata or withMetadata for static values. The hosting integration also exposes overloads for endpoint references, reference expressions, and parameters so metadata can follow Aspire-managed resources.

C#
TypeScript

var builder = DistributedApplication.CreateBuilder(args);

var redis = builder.AddRedis("redis");
var redisPassword = builder.AddParameter("redis-password", secret: true);

var stateStore = builder.AddDaprStateStore("statestore")
    .WithMetadata("actorStateStore", "true")
    .WithMetadata("redisHost", redis.GetEndpoint("tcp"))
    .WithMetadata("redisPassword", redisPassword.Resource);

builder.Build().Run();

import { createBuilder } from './.aspire/modules/aspire.mjs';

const builder = await createBuilder();

const redis = builder
  .addContainer('redis', 'redis')
  .withEndpoint({ name: 'tcp', targetPort: 6379 });
const redisEndpoint = await redis.getEndpoint('tcp');
const redisPassword = await builder.addParameter('redis-password', {
  secret: true,
});

const stateStore = builder
  .addDaprStateStore('statestore')
  .withMetadata('actorStateStore', 'true')
  .withMetadataEndpoint('redisHost', redisEndpoint)
  .withMetadataParameter('redisPassword', redisPassword);

await builder.build().run();

Dashboard integration

Each Dapr sidecar is a hidden resource named from its app resource, such as api-dapr. The Aspire dashboard displays the sidecar’s state, endpoints, logs, traces, and metrics with the rest of the application model.

Deploy to Azure Container Apps

Install 📦 CommunityToolkit.Aspire.Hosting.Azure.Dapr, then enable Dapr components on the Azure Container Apps environment:

C#
TypeScript

var builder = DistributedApplication.CreateBuilder(args);

var environment = builder.AddAzureContainerAppEnvironment("cae");
environment.WithDaprComponents();

builder.Build().Run();

import { createBuilder } from './.aspire/modules/aspire.mjs';

const builder = await createBuilder();

const environment = await builder.addAzureContainerAppEnvironment('cae');
await environment.withDaprComponents();

await builder.build().run();

The integration translates local Dapr component and sidecar settings into Azure Container Apps Dapr configuration during publish.