Deployment — Complete Reference

Aspire separates orchestration (what to run) from deployment (where to run it). The aspire publish command translates your AppHost resource model into deployment manifests for your target platform.

Publish vs Deploy

Aspire does NOT deploy directly. It generates the manifests — you deploy them.

Supported Targets

Docker

Package: Aspire.Hosting.Docker

aspire publish -p docker -o ./docker-output

Generates:

• docker-compose.yml — service definitions matching your AppHost
• Dockerfile for each .NET project
• Environment variable configuration
• Volume mounts
• Network configuration

// AppHost configuration for Docker publishing
var api = builder.AddProject<Projects.Api>("api")
    .PublishAsDockerFile();  // override default publish behavior

Kubernetes

Package: Aspire.Hosting.Kubernetes

aspire publish -p kubernetes -o ./k8s-output

Generates:

• Kubernetes YAML manifests (Deployments, Services, ConfigMaps, Secrets)
• Helm chart (optional)
• Ingress configuration
• Resource limits based on AppHost configuration

// AppHost: customize K8s publishing
var api = builder.AddProject<Projects.Api>("api")
    .WithReplicas(3)                    // maps to K8s replicas
    .WithExternalHttpEndpoints();       // maps to Ingress/LoadBalancer

Azure Container Apps

Package: Aspire.Hosting.Azure.AppContainers

aspire publish -p azure -o ./azure-output

Generates:

• Bicep templates for Azure Container Apps Environment
• Container App definitions for each service
• Azure Container Registry configuration
• Managed identity configuration
• Dapr components (if using Dapr integration)
• VNET configuration

// AppHost: Azure-specific configuration
var api = builder.AddProject<Projects.Api>("api")
    .WithExternalHttpEndpoints()        // maps to external ingress
    .WithReplicas(3);                   // maps to min replicas

// Azure resources are auto-provisioned
var storage = builder.AddAzureStorage("storage");   // creates Storage Account
var cosmos = builder.AddAzureCosmosDB("cosmos");    // creates Cosmos DB account
var sb = builder.AddAzureServiceBus("messaging");   // creates Service Bus namespace

Azure App Service

Package: Aspire.Hosting.Azure.AppService

aspire publish -p appservice -o ./appservice-output

Generates:

• Bicep templates for App Service Plans and Web Apps
• Connection string configuration
• Application settings

Resource model to deployment mapping

CI/CD integration

GitHub Actions example

name: Deploy
on:
  push:
    branches: [main]

jobs:
  deploy:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Setup .NET
        uses: actions/setup-dotnet@v4
        with:
          dotnet-version: '10.0.x'

      - name: Install Aspire CLI
        run: curl -sSL https://aspire.dev/install.sh | bash

      - name: Generate manifests
        run: aspire publish -p azure -o ./deploy

      - name: Deploy to Azure
        uses: azure/arm-deploy@v2
        with:
          template: ./deploy/main.bicep
          parameters: ./deploy/main.parameters.json

Azure DevOps example

trigger:
  branches:
    include: [main]

pool:
  vmImage: 'ubuntu-latest'

steps:
  - task: UseDotNet@2
    inputs:
      version: '10.0.x'

  - script: curl -sSL https://aspire.dev/install.sh | bash
    displayName: 'Install Aspire CLI'

  - script: aspire publish -p azure -o $(Build.ArtifactStagingDirectory)/deploy
    displayName: 'Generate deployment manifests'

  - task: AzureResourceManagerTemplateDeployment@3
    inputs:
      deploymentScope: 'Resource Group'
      templateLocation: '$(Build.ArtifactStagingDirectory)/deploy/main.bicep'

Environment-specific configuration

Using parameters for secrets

// AppHost
var dbPassword = builder.AddParameter("db-password", secret: true);
var postgres = builder.AddPostgres("db", password: dbPassword);

In deployment:

• Docker: Loaded from .env file
• Kubernetes: Loaded from Secret resource
• Azure: Loaded from Key Vault via managed identity

Conditional resources

// Use Azure services in production, emulators locally
if (builder.ExecutionContext.IsPublishMode)
{
    var cosmos = builder.AddAzureCosmosDB("cosmos");    // real Azure resource
}
else
{
    var cosmos = builder.AddAzureCosmosDB("cosmos")
        .RunAsEmulator();                                // local emulator
}

Dev Containers & GitHub Codespaces

Aspire templates include .devcontainer/ configuration:

{
  "name": "Aspire App",
  "image": "mcr.microsoft.com/devcontainers/dotnet:10.0",
  "features": {
    "ghcr.io/devcontainers/features/docker-in-docker:2": {},
    "ghcr.io/devcontainers/features/node:1": {}
  },
  "postCreateCommand": "curl -sSL https://aspire.dev/install.sh | bash",
  "forwardPorts": [18888],
  "portsAttributes": {
    "18888": { "label": "Aspire Dashboard" }
  }
}

Port forwarding works automatically in Codespaces — the dashboard and all service endpoints are accessible via forwarded URLs.