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Backstage Self-Service

important

The Backstage Self-service feature is available on request. Please reach out to support@stackgen.com to avail this service.

Overview​

Backstage offers a Developer Self-service Experience, where your developers can scaffold backend services, frontend apps, CI/CD pipelines, and more, without involving your DevOps teams.

You can do this through software templates that capture repeatable infrastructure and service patterns.

Backstage Self Serve Home

What Does StackGen Enable?​

StackGen provides APIs that let teams go beyond just scaffolding code, enabling them to automate infrastructure provisioning alongside code creation.

With StackGen, your templates can:

  • Scaffold application code
  • Create appStack in Stackgen
  • Export and then generate IaC
  • Provision infrastructure

Integration Steps: How It Works​

  1. Create or reuse an existing Template: Define the structure, parameters, and steps needed to scaffold your service or resource.
  2. Configure the required actions: Use built-in or custom actions to perform specific tasks like provisioning resources, pushing code, or registering components.

Let's look at how this is done in detail.

Steps to Create a Backstage Self-Service Template​

Prerequisites​

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  • You will need to add the StackGen config in app-config.yaml if you haven’t done it already:

    stackGen:
      baseUrl: "${BACKSTAGE_ADAPTER_URL}" 
      apiToken: "${STACKGEN_PAT}"
      allowedTeams: "20f0e211-15ce-4d2c-1e12-0555bffee7bd,20f0e211-15ce-4d2c-2e22-0555bffee7bd"

  • Add the custom action stackGen:createAppstack to your backstage backend

Create or Reuse an Existing Template​

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A typical Backstage template.yaml file defines the user interface and the execution workflow of a Backstage Software Template. It typically includes:

  • steps: It is the input for your actions and consists of the sequence of actions to be executed.
  • output: The results or links shown to the user after the template runs.

Let’s look at each of these configurations in detail:

  • steps in your template.yaml will look like this:

    steps:
      - id: stackGen
        name: Create appStack
        action: stackGen:createAppstack
        input:
          appstack:
            name: "MyappStack"
            # Optional: teamId can be omitted if not needed
            teamId: "team-123"
            cloudProvider: "aws"
            resources:
              - resourceType: "aws_s3" # must be valid stackGen resourceType
                # Only one of 'configuration' or 'resourcePackId' should be provided
                configuration:
                  bucket_name: "mybucket" # configuration keys for a stackGen resource must be valid otherwise values will not be set.

  • output in your template.yaml will look like this:

    output:
      links:
        - title: 'View Created AppStack in StackGen'
          url: '${{ steps.stackGen.output.appStackURL }}'

You can contact support@stackgen.com to help you configure these supported properties.

Advanced template.yaml Configurations​

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You can additionally configure steps for:

  • Resource Packs

         - resourceType: "resourcePack"
           resourcePackId: "20f0e212-15ce-4d2c-1e12-0555bffee7bd" # resourcePackId should be valid.
           # No configuration here because resourcePackId is used

  • Resource Groups like Helm

        - resourceType: "helm_workload" # for a resourceType which is a group, children can be specified.
          children:
            - resourceType: "helm_workload"
              configuration:
                name: test-workload
                image: test-image
            - resourceType: helm_service
              configuration:
                name: test-service

    Contact support@stackgen.com to help you configure these supported properties. Check out the Backstage documentation to learn how to write template.yaml.

Configure the action in Your Backstage Backend​

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This is where the stackGen:createAppstack action (shown below) comes into play.

Here’s how the action works:

  1. Validates the user input using Zod schemas.
  2. Constructs a payload for StackGen’s /v1/appstacks API.
  3. Makes a POST request to StackGen to create the appStack.
  4. Returns the generated appStack URL.
import { createAppStackAction, downloadIaCAction } from '@stackgenhq/backstage-plugin-stackgen-backend';

...

export const scaffolderCustomExtension = createBackendModule({
  pluginId: 'scaffolder',
  moduleId: 'custom-extensions',
  register(env) {
    env.registerInit({
      deps: {
        scaffolder: scaffolderActionsExtensionPoint,
        config: coreServices.rootConfig,
        logger: coreServices.logger,
      },
      async init({ scaffolder, config, logger }) {
        scaffolder.addActions(
          createAppStackAction(config, logger),
          downloadIaCAction(config, logger)
          // ...other actions 
        );
      },
    });
  },
});

...

backend.add(scaffolderCustomExtension);

If you have already configured actions, simply insert the function as shown below:

scaffolder.addActions(createAppstackAction(config, logger));

Check out the Backstage documentation to learn how to register custom actions.

Sample template.yaml for creating an appStack​

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apiVersion: scaffolder.backstage.io/v1beta3
kind: Template
metadata:
  name: create-appstack-with-resource-pack
  title: Create appStack With Resource Pack
  description: Create a new appStack with cloud resources, Helm workload and a Resource Pack
spec:
  owner: user:guest
  type: service
  parameters:
    - title: appStack Info
      required:
        - name
      properties:
        name:
          type: string
          title: appStack Name
        teamId:
          type: string
          title: Team ID
          default: ""

    - title: Cloud Resources
      properties:
        s3:
          type: object
          title: S3 Bucket Configuration
          properties:
            s3BucketName:
              type: string
              title: S3 Bucket Name

        rds:
          type: object
          title: RDS Configuration
          properties:
            rdsEngine:
              type: string
              title: RDS Engine
              default: postgres

    - title: Helm Workload
      properties:
        workloadName:
          type: string
          title: Deployment Name
        image:
          type: string
          title: Image Name
        imageTag:
          type: string
          title: Image Tag
          default: latest
        replicas:
          type: number
          title: Replicas
          default: 3
        serviceName:
          type: string
          title: Service Name
        serviceLabel:
          type: string
          title: Service Label
          default: exampleApp

    - title: Resource Pack
      required:
        - resourcePackId
      properties:
        resourcePackId:
          type: string
          title: Resource Pack ID
          description: ID of the resource pack to include in resources

  steps:
    - id: stackgen
      name: Create appStack
      action: stackGen:createAppstack
      input:
        appstack:
          name: ${{ parameters.name }}
          cloudProvider: "aws"
          teamId: ${{ parameters.teamId }}
          resources:
            - resourceType: aws_s3
              configuration:
                bucket_name: ${{ parameters.s3.s3BucketName }}
            - resourceType: aws_rds
              configuration:
                rds_engine: ${{ parameters.rds.rdsEngine }}
                rds_master_password: "${var.rds_password}"
            - resourceType: helm_workload
              children:
                - resourceType: helm_workload
                  configuration:
                    name: ${{ parameters.workloadName }}
                    image: ${{ parameters.image }}
                    image_tag: ${{ parameters.imageTag }}
                    replicas: ${{ parameters.replicas }}
                    labels:
                      service: ${{ parameters.serviceLabel }}
                - resourceType: helm_service
                  configuration:
                    name: ${{ parameters.serviceName }}
            - resourceType: resourcePack
              resourcePackId: ${{ parameters.resourcePackId }}

  output:
    links:
      - title: 'View Created appStack in StackGen'
        url: ${{ steps.stackgen.output.appstackURL }}

API References Used​

GET /v1/team/listTeams – Retrieves available teams for resource ownership. Check out the API reference documentation at StackGen Integrations Gateway API.

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