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Getting started with Red Hat Developer Hub

Red Hat Developer Hub 1.3

Red Hat Customer Content Services

Abstract

Red Hat Developer Hub is an enterprise-grade platform for building developer portals. You can configure and customize your Developer Hub instance to meet your needs and preferences.

Preface
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As a developer, you can use Red Hat Developer Hub to experience a streamlined development environment. Red Hat Developer Hub is driven by a centralized software catalog, providing efficiency to your microservices and infrastructure. It enables your product team to deliver quality code without any compromises.

This section describes the configurations that are required to access the Red Hat Developer Hub, including:

  • Custom applications configuration
  • Source control configuration for Developer Hub Catalog

To access the Red Hat Developer Hub, you must add a custom application configuration file to Red Hat OpenShift Container Platform. In OpenShift Container Platform, you can use the following content as a base template to create a ConfigMap named app-config-rhdh: 

kind: ConfigMap
apiVersion: v1
metadata:
  name: app-config-rhdh
data:
  app-config-rhdh.yaml: |
    app:
      title: Red Hat Developer Hub
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You can add the custom application configuration file to OpenShift Container Platform in one of the following ways:

  • The Red Hat Developer Hub Operator
  • The Red Hat Developer Hub Helm chart

You can use the Red Hat Developer Hub Helm chart to add a custom application configuration file to your OpenShift Container Platform instance.

Prerequisites

  • You have created an Red Hat OpenShift Container Platform account.

Procedure

  1. From the OpenShift Container Platform web console, select the ConfigMaps tab.
  2. Click Create ConfigMap.
  3. From Create ConfigMap page, select the YAML view option in Configure via and make changes to the file, if needed.
  4. Click Create.
  5. Go to the Helm tab to see the list of Helm releases.
  6. Click the overflow menu on the Helm release that you want to use and select Upgrade.

  7. Use either the Form view or YAML view to edit the Helm configuration.

    • Using Form view

      1. Expand Root Schema → Backstage chart schema → Backstage parameters → Extra app configuration files to inline into command arguments.
      2. Click the Add Extra app configuration files to inline into command arguments link.

      3. Enter the value in the following fields:

        • configMapRef: app-config-rhdh
        • filename: app-config-rhdh.yaml
      4. Click Upgrade.

    • Using YAML view

      1. Set the value of the upstream.backstage.extraAppConfig.configMapRef and upstream.backstage.extraAppConfig.filename parameters as follows: 

        # ... other Red Hat Developer Hub Helm Chart configurations
upstream:
  backstage:
    extraAppConfig:
      - configMapRef: app-config-rhdh
        filename: app-config-rhdh.yaml
# ... other Red Hat Developer Hub Helm Chart configurations
        Copy to Clipboard Toggle word wrap
      2. Click Upgrade.

A custom application configuration file is a ConfigMap object that you can use to change the configuration of your Red Hat Developer Hub instance. If you are deploying your Developer Hub instance on Red Hat OpenShift Container Platform, you can use the Red Hat Developer Hub Operator to add a custom application configuration file to your OpenShift Container Platform instance by creating the ConfigMap object and referencing it in the Developer Hub custom resource (CR).

The custom application configuration file contains a sensitive environment variable, named BACKEND_SECRET. This variable contains a mandatory backend authentication key that Developer Hub uses to reference an environment variable defined in an OpenShift Container Platform secret. You must create a secret, named 'secrets-rhdh', and reference it in the Developer Hub CR.

Note

You are responsible for protecting your Red Hat Developer Hub installation from external and unauthorized access. Manage the backend authentication key like any other secret. Meet strong password requirements, do not expose it in any configuration files, and only inject it into configuration files as an environment variable.

Prerequisites

  • You have an active Red Hat OpenShift Container Platform account.
  • Your administrator has installed the Red Hat Developer Hub Operator in OpenShift Container Platform. For more information, see Installing the Red Hat Developer Hub Operator.
  • You have created the Red Hat Developer Hub CR in OpenShift Container Platform.

Procedure

  1. From the Developer perspective in the OpenShift Container Platform web console, select the Topology view, and click the Open URL icon on the Developer Hub pod to identify your Developer Hub external URL: <RHDH_URL>.
  2. From the Developer perspective in the OpenShift Container Platform web console, select the ConfigMaps view.
  3. Click Create ConfigMap.

  4. Select the YAML view option in Configure via and use the following example as a base template to create a ConfigMap object, such as app-config-rhdh.yaml: 

    kind: ConfigMap
apiVersion: v1
metadata:
  name: app-config-rhdh
data:
  "app-config-rhdh.yaml": |
    app:
      title: Red Hat Developer Hub
      baseUrl: <RHDH_URL>
    1 
    
    backend:
      auth:
        externalAccess:
            - type: legacy
              options:
                subject: legacy-default-config
                secret: "${BACKEND_SECRET}"
    2 
    
      baseUrl: <RHDH_URL>
    3 
    
      cors:
        origin: <RHDH_URL>
    4
    Copy to Clipboard Toggle word wrap
    1
    Set the external URL of your Red Hat Developer Hub instance.
    2
    Use an environment variable exposing an OpenShift Container Platform secret to define the mandatory Developer Hub backend authentication key.
    3
    Set the external URL of your Red Hat Developer Hub instance.
    4
    Set the external URL of your Red Hat Developer Hub instance.
  5. Click Create.
  6. Select the Secrets view.
  7. Click Create Key/value Secret.
  8. Create a secret named secrets-rhdh.

  9. Add a key named BACKEND_SECRET and a base64 encoded string as a value. Use a unique value for each Red Hat Developer Hub instance. For example, you can use the following command to generate a key from your terminal: 

    node -p 'require("crypto").randomBytes(24).toString("base64")'
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  10. Click Create.
  11. Select the Topology view.

  12. Click the overflow menu for the Red Hat Developer Hub instance that you want to use and select Edit Backstage to load the YAML view of the Red Hat Developer Hub instance.

    operator install 2
    View larger image
    operator install 2

  13. In the CR, enter the name of the custom application configuration config map as the value for the spec.application.appConfig.configMaps field, and enter the name of your secret as the value for the spec.application.extraEnvs.secrets field. For example: 

    apiVersion: rhdh.redhat.com/v1alpha1
kind: Backstage
metadata:
  name: developer-hub
spec:
  application:
    appConfig:
      mountPath: /opt/app-root/src
      configMaps:
         - name: app-config-rhdh
    extraEnvs:
      secrets:
         - name: secrets-rhdh
    extraFiles:
      mountPath: /opt/app-root/src
    replicas: 1
    route:
      enabled: true
  database:
    enableLocalDb: true
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  14. Click Save.
  15. Navigate back to the Topology view and wait for the Red Hat Developer Hub pod to start.
  16. Click the Open URL icon to use the Red Hat Developer Hub platform with the configuration changes.

Additional resources

Chapter 2. Bulk importing GitHub repositories
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Important

These features are for Technology Preview only. Technology Preview features are not supported with Red Hat production service level agreements (SLAs), might not be functionally complete, and Red Hat does not recommend using them for production. These features provide early access to upcoming product features, enabling customers to test functionality and provide feedback during the development process.

For more information on Red Hat Technology Preview features, see Technology Preview Features Scope.

Red Hat Developer Hub can automate GitHub repositories onboarding and track their import status.

You can enable the Bulk Import feature for users and give them the necessary permissions to access it.

Prerequisites

Procedure

  1. The Bulk Import plugins are installed but disabled by default. To enable the ./dynamic-plugins/dist/janus-idp-backstage-plugin-bulk-import-backend-dynamic and ./dynamic-plugins/dist/janus-idp-backstage-plugin-bulk-import plugins, edit your dynamic-plugins.yaml with the following content:

    dynamic-plugins.yaml fragment

    plugins:
  - package: ./dynamic-plugins/dist/janus-idp-backstage-plugin-bulk-import-backend-dynamic
    disabled: false
  - package: ./dynamic-plugins/dist/janus-idp-backstage-plugin-bulk-import
    disabled: false
    Copy to Clipboard Toggle word wrap

    See Installing and viewing dynamic plugins.

  2. Configure the required bulk.import RBAC permission for the users who are not administrators as follows:

    rbac-policy.csv fragment

    p, role:default/bulk-import, bulk.import, use, allow
g, user:default/<your_user>, role:default/bulk-import
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    Note that only Developer Hub administrators or users with the bulk.import permission can use the Bulk Import feature. See Permission policies in Red Hat Developer Hub.

Verification

  • The sidebar displays a Bulk Import option.
  • The Bulk Import page shows a list of Added Repositories.

2.2. Importing multiple GitHub repositories
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In Red Hat Developer Hub, you can select your GitHub repositories and automate their onboarding to the Developer Hub catalog.

Prerequisites

Procedure

  1. Click Bulk Import in the left sidebar.

  2. Click the Add button in the top-right corner to see the list of all repositories accessible from the configured GitHub integrations.

    1. From the Repositories view, you can select any repository, or search for any accessible repositories. For each repository selected, a catalog-info.yaml is generated.
    2. From the Organizations view, you can select any organization by clicking Select in the third column. This option allows you to select one or more repositories from the selected organization.

  3. Click Preview file to view or edit the details of the pull request for each repository.

    1. Review the pull request description and the catalog-info.yaml file content.
    2. Optional: when the repository has a .github/CODEOWNERS file, you can select the Use CODEOWNERS file as Entity Owner checkbox to use it, rather than having the content-info.yaml contain a specific entity owner.
    3. Click Save.

  4. Click Create pull requests. At this point, a set of dry-run checks runs against the selected repositories to ensure they meet the requirements for import, such as:

    1. Verifying that there is no entity in the Developer Hub catalog with the name specified in the repository catalog-info.yaml
    2. Verifying that the repository is not empty

    3. Verifying that the repository contains a .github/CODEOWNERS file if the Use CODEOWNERS file as Entity Owner checkbox is selected for that repository

      • If any errors occur, the pull requests are not created, and you see a Failed to create PR error message detailing the issues. To view more details about the reasons, click Edit.
      • If there are no errors, the pull requests are created, and you are redirected to the list of added repositories.
  5. Review and merge each pull request that creates a catalog-info.yml file.

Verification

  • The Added repositories list displays the repositories you imported, each with an appropriate status: either Waiting for approval or Added.
  • For each Waiting for approval import job listed, there is a corresponding pull request adding the catalog-info.yaml file in the corresponding repository.

2.3. Managing the added repositories
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You can oversee and manage the repositories that are imported to the Developer Hub.

Prerequisites

Procedure

  1. Click Bulk Import in the left sidebar to display all the current repositories that are being tracked as Import jobs, along with their status.

    Added
    The repository is added to the Developer Hub catalog after the import pull request is merged or if the repository already contained a catalog-info.yaml file during the bulk import. Note that it may take a few minutes for the entities to be available in the catalog.
    Waiting for approval

    There is an open pull request adding a catalog-info.yaml file to the repository. You can:

    • Click the pencil icon on the right to see details about the pull request or edit the pull request content right from Developer Hub.
    • Delete the Import job, this action closes the import PR as well.
    • To transition the Import job to the Added state, merge the import pull request from the Git repository.
    Empty
    Developer Hub is unable to determine the import job status because the repository is imported from other sources but does not have a catalog-info.yaml file and lacks any import pull request adding it.
Note
  • After an import pull request is merged, the import status is marked as Added in the list of Added Repositories, but it might take a few seconds for the corresponding entities to appear in the Developer Hub Catalog.

  • A location added through other sources (like statically in an app-config.yaml file, dynamically when enabling GitHub discovery, or registered manually using the "Register an existing component" page) might show up in the Bulk Import list of Added Repositories if the following conditions are met:

    • The target repository is accessible from the configured GitHub integrations.
    • The location URL points to a catalog-info.yaml file at the root of the repository default branch.

2.4. Understanding the Bulk Import audit Logs
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The Bulk Import backend plugin adds the following events to the Developer Hub audit logs. See Audit Logs in Red Hat Developer Hub for more information on how to configure and view audit logs.

Bulk Import Events:

BulkImportUnknownEndpoint
Tracks requests to unknown endpoints.
BulkImportPing
Tracks GET requests to the /ping endpoint, which allows us to make sure the bulk import backend is up and running.
BulkImportFindAllOrganizations
Tracks GET requests to the /organizations endpoint, which returns the list of organizations accessible from all configured GitHub Integrations.
BulkImportFindRepositoriesByOrganization
Tracks GET requests to the /organizations/:orgName/repositories endpoint, which returns the list of repositories for the specified organization (accessible from any of the configured GitHub Integrations).
BulkImportFindAllRepositories
Tracks GET requests to the /repositories endpoint, which returns the list of repositories accessible from all configured GitHub Integrations.
BulkImportFindAllImports
Tracks GET requests to the /imports endpoint, which returns the list of existing import jobs along with their statuses.
BulkImportCreateImportJobs
Tracks POST requests to the /imports endpoint, which allows to submit requests to bulk-import one or many repositories into the Developer Hub catalog, by eventually creating import pull requests in the target repositories.
BulkImportFindImportStatusByRepo
Tracks GET requests to the /import/by-repo endpoint, which fetches details about the import job for the specified repository.
BulkImportDeleteImportByRepo
Tracks DELETE requests to the /import/by-repo endpoint, which deletes any existing import job for the specified repository, by closing any open import pull request that could have been created.

Example bulk import audit logs

{
  "actor": {
    "actorId": "user:default/myuser",
    "hostname": "localhost",
    "ip": "::1",
    "userAgent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36"
  },
  "eventName": "BulkImportFindAllOrganizations",
  "isAuditLog": true,
  "level": "info",
  "message": "'get /organizations' endpoint hit by user:default/myuser",
  "meta": {},
  "plugin": "bulk-import",
  "request": {
    "body": {},
    "method": "GET",
    "params": {},
    "query": {
      "pagePerIntegration": "1",
      "sizePerIntegration": "5"
    },
    "url": "/api/bulk-import/organizations?pagePerIntegration=1&sizePerIntegration=5"
  },
  "response": {
    "status": 200
  },
  "service": "backstage",
  "stage": "completion",
  "status": "succeeded",
  "timestamp": "2024-08-26 16:41:02"
}
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When using the app-config, you can do the following:

  • Customize and extend the default Home page layout with additional cards that appear based on the plugins you have installed and enabled.
  • Change quick access links.

  • Add, reorganize, and remove the following available cards:

    • Search bar
    • Quick access
    • Headline
    • Markdown
    • Placeholder
    • Catalog starred entities
    • Featured docs

3.1. Customizing the Home page cards
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Administrators can change the fixed height of cards that are in a 12-column grid.

The default Home page is as shown in the following app-config file configuration: 

dynamicPlugins:
  frontend:
    janus-idp.backstage-plugin-dynamic-home-page:
      dynamicRoutes:
        - path: /
          importName: DynamicHomePage
      mountPoints:
        - mountPoint: home.page/cards
          importName: SearchBar
          config:
            layouts:
              xl: { w: 10, h: 1, x: 1 }
              lg: { w: 10, h: 1, x: 1 }
              md: { w: 10, h: 1, x: 1 }
              sm: { w: 10, h: 1, x: 1 }
              xs: { w: 12, h: 1 }
              xxs: { w: 12, h: 1 }
        - mountPoint: home.page/cards
          importName: QuickAccessCard
          config:
            layouts:
              xl: { w: 7, h: 8 }
              lg: { w: 7, h: 8 }
              md: { w: 7, h: 8 }
              sm: { w: 12, h: 8 }
              xs: { w: 12, h: 8 }
              xxs: { w: 12, h: 8 }
        - mountPoint: home.page/cards
          importName: CatalogStarredEntitiesCard
          config:
            layouts:
              xl: { w: 5, h: 4, x: 7 }
              lg: { w: 5, h: 4, x: 7 }
              md: { w: 5, h: 4, x: 7 }
              sm: { w: 12, h: 4 }
              xs: { w: 12, h: 4 }
              xxs: { w: 12, h: 4 }
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Prerequisites

  • You have administrative access and can modify the app-config.yaml file for dynamic plugin configurations.

Procedure

  • Configure different cards for your Home page in Red Hat Developer Hub as follows:

    Search
    dynamicPlugins:
  frontend:
    janus-idp.backstage-plugin-dynamic-home-page:
      mountPoints:
        - mountPoint: home.page/cards
          importName: SearchBar
          config:
            layouts:
              xl: { w: 10, h: 1, x: 1 }
              lg: { w: 10, h: 1, x: 1 }
              md: { w: 10, h: 1, x: 1 }
              sm: { w: 10, h: 1, x: 1 }
              xs: { w: 12, h: 1 }
              xxs: { w: 12, h: 1 }
    Copy to Clipboard Toggle word wrap
    Expand
    Table 3.1. Available props
    PropDefaultDescription

    path

    /search

    Override the linked search path if needed

    queryParam

    query

    Override the search query parameter name if needed

    Quick access
    dynamicPlugins:
  frontend:
    janus-idp.backstage-plugin-dynamic-home-page:
      mountPoints:
        - mountPoint: home.page/cards
          importName: QuickAccessCard
          config:
            layouts:
              xl: { h: 8 }
              lg: { h: 8 }
              md: { h: 8 }
              sm: { h: 8 }
              xs: { h: 8 }
              xxs: { h: 8 }
    Copy to Clipboard Toggle word wrap
    Expand
    Table 3.2. Available props
    PropDefaultDescription

    title

    Quick Access

    Override the linked search path if needed

    path

    none

    Override the search query parameter name if needed

    Headline
    dynamicPlugins:
  frontend:
    janus-idp.backstage-plugin-dynamic-home-page:
      mountPoints:
        - mountPoint: home.page/cards
          importName: Headline
          config:
            layouts:
              xl: { h: 1 }
              lg: { h: 1 }
              md: { h: 1 }
              sm: { h: 1 }
              xs: { h: 1 }
              xxs: { h: 1 }
            props:
              title: Important info
    Copy to Clipboard Toggle word wrap
    Expand
    Table 3.3. Available props
    PropDefaultDescription

    title

    none

    Title

    Markdown
    dynamicPlugins:
  frontend:
    janus-idp.backstage-plugin-dynamic-home-page:
      mountPoints:
        - mountPoint: home.page/cards
          importName: MarkdownCard
          config:
            layouts:
              xl: { w: 6, h: 4 }
              lg: { w: 6, h: 4 }
              md: { w: 6, h: 4 }
              sm: { w: 6, h: 4 }
              xs: { w: 6, h: 4 }
              xxs: { w: 6, h: 4 }
            props:
              title: Company links
              content: |
                ### RHDH
                * [Website](https://developers.redhat.com/rhdh/overview)
                * [Documentation](https://docs.redhat.com/en/documentation/red_hat_developer_hub/)
                * [GitHub Showcase](https://github.com/redhat-developer/rhdh)
                * [GitHub Plugins](https://github.com/janus-idp/backstage-plugins)
        - mountPoint: home.page/cards
          importName: Markdown
          config:
            layouts:
              xl: { w: 6, h: 4, x: 6 }
              lg: { w: 6, h: 4, x: 6 }
              md: { w: 6, h: 4, x: 6 }
              sm: { w: 6, h: 4, x: 6 }
              xs: { w: 6, h: 4, x: 6 }
              xxs: { w: 6, h: 4, x: 6 }
            props:
              title: Important company links
              content: |
                ### RHDH
                * [Website](https://developers.redhat.com/rhdh/overview)
                * [Documentation](https://docs.redhat.com/en/documentation/red_hat_developer_hub/)
                * [GitHub Showcase](https://github.com/redhat-developer/rhdh)
                * [GitHub Plugins](https://github.com/janus-idp/backstage-plugins)
    Copy to Clipboard Toggle word wrap
    Placeholder
    dynamicPlugins:
  frontend:
    janus-idp.backstage-plugin-dynamic-home-page:
      mountPoints:
        - mountPoint: home.page/cards
          importName: Placeholder
          config:
            layouts:
              xl: { w: 1, h: 1 }
              lg: { w: 1, h: 1 }
              md: { w: 1, h: 1 }
              sm: { w: 1, h: 1 }
              xs: { w: 1, h: 1 }
              xxs: { w: 1, h: 1 }
            props:
              showBorder: true
              debugContent: '1'
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    Catalog starred entities
    dynamicPlugins:
  frontend:
    janus-idp.backstage-plugin-dynamic-home-page:
      mountPoints:
        - mountPoint: home.page/cards
          importName: CatalogStarredEntitiesCard
    Copy to Clipboard Toggle word wrap
    Featured docs
    dynamicPlugins:
  frontend:
    janus-idp.backstage-plugin-dynamic-home-page:
      mountPoints:
        - mountPoint: home.page/cards
          importName: FeaturedDocsCard
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Prerequisites

  • Include the following optimal parameters in each of your breakpoints:

    • width (w)
    • height (h)
    • position (x and y)

Procedure

  • Configure your Developer Hub app-config.yaml configuration file by choosing one of the following options:

    • Use the full space on smaller windows and half of the space on larger windows as follows: 
dynamicPlugins:
  frontend:
    janus-idp.backstage-plugin-dynamic-home-page:
      mountPoints:
        - mountPoint: home.page/cards
          importName: Placeholder
          config:
            layouts:
              xl: { w: 6, h: 2 }
              lg: { w: 6, h: 2 }
              md: { w: 6, h: 2 }
              sm: { w: 12, h: 2 }
              xs: { w: 12, h: 2 }
              xxs: { w: 12, h: 2 }
            props:
              showBorder: true
              debugContent: a placeholder
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  • Show the cards side by side by defining the x parameter as follows: 
dynamicPlugins:
  frontend:
    janus-idp.backstage-plugin-dynamic-home-page:
      mountPoints:
        - mountPoint: home.page/cards
          importName: Placeholder
          config:
            layouts:
              xl: { w: 6, h: 2 }
              lg: { w: 6, h: 2 }
              md: { w: 6, h: 2 }
              sm: { w: 12, h: 2 }
              xs: { w: 12, h: 2 }
              xxs: { w: 12, h: 2 }
            props:
              showBorder: true
              debugContent: left
        - mountPoint: home.page/cards
          importName: Placeholder
          config:
            layouts:
              xl: { w: 6, h: 2, x: 6 }
              lg: { w: 6, h: 2, x: 6 }
              md: { w: 6, h: 2, x: 6 }
              sm: { w: 12, h: 2, x: 0 }
              xs: { w: 12, h: 2, x: 0 }
              xxs: { w: 12, h: 2, x: 0 }
            props:
              showBorder: true
              debugContent: right
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However, you can see a second card below this card by default.

  • Show the cards in three columns by defining the x parameter as follows: 
dynamicPlugins:
  frontend:
    janus-idp.backstage-plugin-dynamic-home-page:
      mountPoints:
        - mountPoint: home.page/cards
          importName: Placeholder
          config:
            layouts:
              xl: { w: 4, h: 2 }
              lg: { w: 4, h: 2 }
              md: { w: 4, h: 2 }
              sm: { w: 6, h: 2 }
              xs: { w: 12, h: 2 }
              xxs: { w: 12, h: 2 }
            props:
              showBorder: true
              debugContent: left
        - mountPoint: home.page/cards
          importName: Placeholder
          config:
            layouts:
              xl: { w: 4, h: 2, x: 4 }
              lg: { w: 4, h: 2, x: 4 }
              md: { w: 4, h: 2, x: 4 }
              sm: { w: 6, h: 2, x: 6 }
              xs: { w: 12, h: 2 }
              xxs: { w: 12, h: 2 }
            props:
              showBorder: true
              debugContent: center
        - mountPoint: home.page/cards
          importName: Placeholder
          config:
            layouts:
              xl: { w: 4, h: 2, x: 8 }
              lg: { w: 4, h: 2, x: 8 }
              md: { w: 4, h: 2, x: 8 }
              sm: { w: 6, h: 2 }
              xs: { w: 12, h: 2 }
              xxs: { w: 12, h: 2 }
            props:
              showBorder: true
              debugContent: right
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To access the Home page in Red Hat Developer Hub, the base URL must include the /developer-hub proxy. You can configure the Home page by passing the data into the app-config.yaml file as a proxy. You can provide data to the Home page from the following sources:

  • JSON files hosted on GitHub or GitLab.
  • A dedicated service that provides the Home page data in JSON format using an API.

Prerequisites

Procedure

  • To access the data from the JSON files, add the following code to the Developer Hub app-config.yaml configuration file:

  • Add the following code to the app-config.yaml file: 

    proxy:
  endpoints:
    # Other Proxies
    # customize developer hub instance
    '/developer-hub':
      target: <DOMAIN_URL> # i.e https://raw.githubusercontent.com/
      pathRewrite:
        '^/api/proxy/developer-hub': <path to json file> # i.e /redhat-developer/rhdh/main/packages/app/public/homepage/data.json
      changeOrigin: true
      secure: true
      # Change to "false" in case of using self hosted cluster with a self-signed certificate
      headers:
	<HEADER_KEY>: <HEADER_VALUE> # optional and can be passed as needed i.e Authorization can be passed for private GitHub repo and PRIVATE-TOKEN can be passed for private GitLab repo
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When using a dedicated service, you can do the following:

  • Use the same service to provide the data to all configurable Developer Hub pages or use a different service for each page.
  • Use the red-hat-developer-hub-customization-provider as an example service, which provides data for both the Home and Tech Radar pages. The red-hat-developer-hub-customization-provider service provides the same data as default Developer Hub data. You can fork the red-hat-developer-hub-customization-provider service repository from GitHub and modify it with your own data, if required.
  • Deploy the red-hat-developer-hub-customization-provider service and the Developer Hub Helm chart on the same cluster.

Prerequisites

  • You have installed the Red Hat Developer Hub using Helm Chart.

For more information, see Installing Red Hat Developer Hub on OpenShift Container Platform with the Helm chart.

Procedure

To use a separate service to provide the Home page data, complete the following steps:

  1. From the Developer perspective in the Red Hat OpenShift Container Platform web console, click +Add > Import from Git.

  2. Enter the URL of your Git repository into the Git Repo URL field.

    To use the red-hat-developer-hub-customization-provider service, add the URL for the red-hat-developer-hub-customization-provider repository or your fork of the repository containing your customizations.

  3. On the General tab, enter red-hat-developer-hub-customization-provider in the Name field and click Create.

  4. On the Advanced Options tab, copy the value from the Target Port.

    Note

    The Target Port automatically generates a Kubernetes or OpenShift Container Platform service to communicate with.

  5. Add the following code to the app-config-rhdh.yaml file: 

    proxy:
  endpoints:
    # Other Proxies
    # customize developer hub instance
    '/developer-hub':
      target: ${HOMEPAGE_DATA_URL}
      changeOrigin: true
      # Change to "false" in case of using self-hosted cluster with a self-signed certificate
      secure: true
    Copy to Clipboard Toggle word wrap

    where HOMEPAGE_DATA_URL is defined as http://<SERVICE_NAME>:8080, for example, http://rhdh-customization-provider:8080.

    Note

    The red-hat-developer-hub-customization-provider service contains the 8080 port by default. If you are using a custom port, you can specify it with the 'PORT' environmental variable in the app-config-rhdh.yaml file.

  6. Replace the HOMEPAGE_DATA_URL by adding the URL to rhdh-secrets or by directly replacing it in your custom ConfigMap.
  7. Delete the Developer Hub pod to ensure that the new configurations are loaded correctly.

Verification

  • To view the service, navigate to the Administrator perspective in the OpenShift Container Platform web console and click Networking > Service.

    Note

    You can also view the Service Resources in the Topology view.

  • Ensure that the provided API URL for the Home page returns the data in JSON format as shown in the following example: 

    [
  {
    "title": "Dropdown 1",
    "isExpanded": false,
    "links": [
      {
        "iconUrl": "https://imagehost.com/image.png",
        "label": "Dropdown 1 Item 1",
        "url": "https://example.com/"
      },
      {
        "iconUrl": "https://imagehost2.org/icon.png",
        "label": "Dropdown 1 Item 2",
        "url": ""
      }
    ]
  },
  {
    "title": "Dropdown 2",
    "isExpanded": true,
    "links": [
      {
        "iconUrl": "http://imagehost3.edu/img.jpg",
        "label": "Dropdown 2 Item 1",
        "url": "http://example.com"
      }
    ]
  }
]
    Copy to Clipboard Toggle word wrap
    Note

    If the request call fails or is not configured, the Developer Hub instance falls back to the default local data.

  • If the images or icons do not load, then allowlist them by adding your image or icon host URLs to the content security policy’s (csp) img-src in your custom ConfigMap as follows: 
kind: ConfigMap
apiVersion: v1
metadata:
  name: app-config-rhdh
data:
  app-config-rhdh.yaml: |
    app:
      title: Red Hat Developer Hub
    backend:
      csp:
        connect-src:
          - "'self'"
          - 'http:'
          - 'https:'
        img-src:
          - "'self'"
          - 'data:'
          - <image host url 1>
          - <image host url 2>
          - <image host url 3>
    # Other Configurations
Copy to Clipboard Toggle word wrap

In Red Hat Developer Hub, the Tech Radar page is provided by the tech-radar dynamic plugin, which is disabled by default. For information about enabling dynamic plugins in Red Hat Developer Hub see Configuring plugins in Red Hat Developer Hub.

In Red Hat Developer Hub, you can configure Learning Paths by passing the data into the app-config.yaml file as a proxy. The base Tech Radar URL must include the /developer-hub/tech-radar proxy.

Note

Due to the use of overlapping pathRewrites for both the tech-radar and homepage quick access proxies, you must create the tech-radar configuration (^api/proxy/developer-hub/tech-radar) before you create the homepage configuration (^/api/proxy/developer-hub).

For more information about customizing the Home page in Red Hat Developer Hub, see Customizing the Home page in Red Hat Developer Hub.

You can provide data to the Tech Radar page from the following sources:

  • JSON files hosted on GitHub or GitLab.
  • A dedicated service that provides the Tech Radar data in JSON format using an API.

Prerequisites

You have installed Red Hat Developer Hub by using either the Operator or Helm chart.

For more information, see Installing Red Hat Developer Hub on OpenShift Container Platform.

Procedure

To access the data from the JSON files, complete the following step:

  • Add the following code to the app-config.yaml file: 

    proxy:
  endpoints:
    # Other Proxies
    # customize developer hub instance
    '/developer-hub':
      target: <DOMAIN_URL> # i.e https://raw.githubusercontent.com/
      pathRewrite:
        '^/api/proxy/developer-hub/tech-radar': <path to json file> # i.e /redhat-developer/rhdh/main/packages/app/public/tech-radar/data-default.json
	 '^/api/proxy/developer-hub': <path to json file> # i.e /redhat-developer/rhdh/main/packages/app/public/homepage/data.json
      changeOrigin: true
      secure: true

      # Change to "false" in case of using self hosted cluster with a self-signed certificate
      headers:
	<HEADER_KEY>: <HEADER_VALUE> # optional and can be passed as needed i.e Authorization can be passed for private GitHub repo and PRIVATE-TOKEN can be passed for private GitLab repo
    Copy to Clipboard Toggle word wrap

When using a dedicated service, you can do the following:

  • Use the same service to provide the data to all configurable Developer Hub pages or use a different service for each page.
  • Use the red-hat-developer-hub-customization-provider as an example service, which provides data for both the Home and Tech Radar pages. The red-hat-developer-hub-customization-provider service provides the same data as default Developer Hub data. You can fork the red-hat-developer-hub-customization-provider service repository from GitHub and modify it with your own data, if required.
  • Deploy the red-hat-developer-hub-customization-provider service and the Developer Hub Helm chart on the same cluster.

Prerequisites

  • You have installed the Red Hat Developer Hub using Helm Chart.

For more information, see Installing Red Hat Developer Hub on OpenShift Container Platform with the Helm chart.

Procedure

To use a separate service to provide the Tech Radar data, complete the following steps:

  1. Add the following code to the app-config-rhdh.yaml file: 

    proxy:
  endpoints:
    # Other Proxies
    '/developer-hub/tech-radar':
      target: ${TECHRADAR_DATA_URL}
      changeOrigin: true
      # Change to "false" in case of using self hosted cluster with a self-signed certificate
      secure: true
    Copy to Clipboard Toggle word wrap

    where the TECHRADAR_DATA_URL is defined as http://<SERVICE_NAME>/tech-radar, for example, http://rhdh-customization-provider/tech-radar.

    Note

    You can define the TECHRADAR_DATA_URL by adding it to rhdh-secrets or by directly replacing it with its value in your custom ConfigMap.

  2. Delete the Developer Hub pod to ensure that the new configurations are loaded correctly.

In Red Hat Developer Hub, you can configure Learning Paths by passing the data into the app-config.yaml file as a proxy. The base URL must include the /developer-hub/learning-paths proxy.

Note

Due to the use of overlapping pathRewrites for both the learning-path and homepage quick access proxies, you must create the learning-paths configuration (^api/proxy/developer-hub/learning-paths) before you create the homepage configuration (^/api/proxy/developer-hub).

For more information about customizing the Home page in Red Hat Developer Hub, see Customizing the Home page in Red Hat Developer Hub.

You can provide data to the Learning Path from the following sources:

  • JSON files hosted on GitHub or GitLab.
  • A dedicated service that provides the Learning Path data in JSON format using an API.

Prerequisites

You have installed Red Hat Developer Hub by using either the Operator or Helm chart.

For more information, see Installing Red Hat Developer Hub on OpenShift Container Platform.

Procedure

To access the data from the JSON files, complete the following step:

  • Add the following code to the app-config.yaml file: 

    proxy:
  endpoints:
    '/developer-hub':
      target: https://raw.githubusercontent.com/
      pathRewrite:
        '^/api/proxy/developer-hub/learning-paths': '/redhat-developer/rhdh/main/packages/app/public/learning-paths/data.json'
        '^/api/proxy/developer-hub/tech-radar': '/redhat-developer/rhdh/main/packages/app/public/tech-radar/data-default.json'
        '^/api/proxy/developer-hub': '/redhat-developer/rhdh/main/packages/app/public/homepage/data.json'
      changeOrigin: true
      secure: true
    Copy to Clipboard Toggle word wrap

When using a dedicated service, you can do the following:

  • Use the same service to provide the data to all configurable Developer Hub pages or use a different service for each page.
  • Use the red-hat-developer-hub-customization-provider as an example service, which provides data for both the Home and Tech Radar pages. The red-hat-developer-hub-customization-provider service provides the same data as default Developer Hub data. You can fork the red-hat-developer-hub-customization-provider service repository from GitHub and modify it with your own data, if required.
  • Deploy the red-hat-developer-hub-customization-provider service and the Developer Hub Helm chart on the same cluster.

Prerequisites

  • You have installed the Red Hat Developer Hub using Helm chart.

For more information, see Installing Red Hat Developer Hub on OpenShift Container Platform.

Procedure

To use a dedicated service to provide the Learning Path data, complete the following steps:

  1. Add the following code to the app-config-rhdh.yaml file: 

       proxy:
      endpoints:
        # Other Proxies
        '/developer-hub/learning-paths':
          target: ${LEARNING_PATH_DATA_URL}
          changeOrigin: true
          # Change to "false" in case of using self hosted cluster with a self-signed certificate
          secure: true
    Copy to Clipboard Toggle word wrap

    where the LEARNING_PATH_DATA_URL is defined as http://<SERVICE_NAME>/learning-paths, for example, http://rhdh-customization-provider/learning-paths.

    Note

    You can define the LEARNING_PATH_DATA_URL by adding it to rhdh-secrets or by directly replacing it with its value in your custom ConfigMap.

  2. Delete the Developer Hub pod to ensure that the new configurations are loaded correctly.

The following default theme configurations are available for Red Hat Developer Hub:

The Red Hat Developer Hub theme
Default theme configurations to make your developer portal look like a standard Red Hat Developer Hub instance. For more information, see Section 7.8, “Default Red Hat Developer Hub theme”
The Backstage theme
Default theme configurations to make your developer portal look like a standard Backstage instance. For more information, see Section 7.9, “Default Backstage theme”

You can change or disable particular parameters in a default theme or create a fully customized theme by modifying the app-config-rhdh.yaml file. From the the app-config-rhdh.yaml file, you can customize common theme components, including the following:

  • Company name and logo
  • Font color, size, and style of text in paragraphs, headings, headers, and buttons
  • Header color, gradient, and shape
  • Button color
  • Navigation indicator color

You can also customize some components from the Developer Hub GUI, such as the theme mode (Light Theme, Dark Theme, or Auto).

Note

In Developer Hub, theme configurations are used to change the look and feel of different UI components. So, you might notice changes in different UI components, such as buttons, tabs, sidebars, cards, and tables along with some changes in background color and font used on the RHDH pages.

You can choose one of the following theme modes for your Developer Hub instance:

  • Light theme
  • Dark theme
  • Auto

The default theme mode is Auto, which automatically sets the light or dark theme based on your system preferences.

Prerequisites

  • You are logged in to the Developer Hub web console.

Procedure

  1. From the Developer Hub web console, click Settings.

  2. From the Appearance panel, click LIGHT THEME, DARK THEME, or AUTO to change the theme mode.

    custom theme mode 1
    View larger image
    custom theme mode 1

You can customize the branding logo of your Developer Hub instance by configuring the branding section the app-config-rhdh.yaml file, as shown in the following example: 

app:
  branding:
    fullLogo: ${BASE64_EMBEDDED_FULL_LOGO}
1 

    iconLogo: ${BASE64_EMBEDDED_ICON_LOGO}
2
Copy to Clipboard Toggle word wrap

where:

1
fullLogo is the logo on the expanded (pinned) sidebar and expects a base64 encoded image.
2
iconLogo is the logo on the collapsed (unpinned) sidebar and expects a base64 encoded image.

You can also customize the width of the branding logo by setting a value for the fullLogoWidth field in the branding section, as shown in the following example: 

app:
  branding:
    fullLogoWidth: 110px
1 

# ...
Copy to Clipboard Toggle word wrap
1
The default value for the logo width is 110px. The following units are supported: integer, px, em, rem, percentage.

The sidebar menu in Red Hat Developer Hub consists of two main parts:

  • Main menu items: These items are the static menu items that form the core navigation structure of sidebar. These menu items remain consistent and are predefined.
  • Dynamic plugin menu items: These items are displayed beneath the main menu and can be customized based on the plugins installed. The main menu items section is dynamic and can change based on your preferences and installed plugins.

Procedure

  1. Customize the main menu items using the following steps:

    1. Open the app-config-rhdh.yaml file.
    2. To customize the order and parent-child relationships for the main menu items, use the dynamicPlugins.frontend.default.main-menu-items.menuItems field.
    3. For dynamic plugin menu items, use the dynamicPlugins.frontend.<package_name>.menuItems field.

    Example app-config-rhdh.yaml file

    dynamicPlugins:
  frontend:
    <package_name>: # same as `scalprum.name` key in plugin's `package.json`
      menuItems: # optional, allows you to configure plugin menu items in the main sidebar navigation
        <menu_item_name>: # unique name in the plugin menu items list
    1 
    
          icon: home | group | category | extension | school | _<your_icon>_
    2 
    
          title: My Plugin Page # optional, same as `menuItem.text` in `dynamicRoutes`
    3 
    
          priority: 10 # optional, defines the order of menu items in the sidebar
    4 
    
          parent: favorites # optional, defines parent-child relationships for nested menu items
    5
    Copy to Clipboard Toggle word wrap

    You can modify the fields in the previous example to configure the desired order and parent-child relationships of the sidebar menu items.

    1
    This attribute represents a unique name in the main sidebar navigation. It can denote either a standalone menu item or a parent menu item. If this attribute represents a plugin menu item, the name of the attribute must match with the corresponding path in dynamicRoutes. For example, if dynamicRoutes defines path: /my-plugin, then menu_item_name must be defined as my-plugin.

    For more complex, multi-segment paths such as path: /metrics/users/info, the menu_item_name must use dot notation to represent the full path, for example, metrics.users.info. Trailing and leading slashes in paths are ignored. For example, path: /docs results in menu_item_name: docs, and path: /metrics/users results in menu_item_name: metrics.users.

    2
    This optional attribute specifies the icon for the menu item. You can use default icons or extend the icon set with dynamic plugins. Developer Hub also provides additional icons in its internal library, such as:

    Home Icon in the internal library

    dynamicPlugins:
  frontend:
    <package_name>:
      menuItems:
        <menu_item_name>:
          icon: home
    Copy to Clipboard Toggle word wrap

    Similarly, the internal library includes icons for group, category, extension, and school. If the icon is already defined in the dynamicRoutes configuration under menuItem.icon, it can be removed from the in the menuItems configuration. Also, both SVG and HTML image icons are supported. For example:

    Example SVG icon

    icon: <svg width="20px" height="20px" viewBox="0 0 512 512" xmlns="http://www.w3.org/2000/svg" fill="#ffffff">...</svg>
    Copy to Clipboard Toggle word wrap

    Example image icon

    icon: https://img.icons8.com/ios-glyphs/20/FFFFFF/shop.png
    Copy to Clipboard Toggle word wrap

    3
    This optional attribute specifies the title of the menu item. It can be removed if the title is already specified in the dynamicRoutes configuration under menuItem.text.
    4
    This optional attribute sets the order in which menu items appear in the sidebar. The default priority is 0, which places the item at the bottom of the list. A higher priority value places the item higher in the sidebar. You can define this attribute for each section.
    5
    This optional attribute specifies the parent menu item under which the current item is nested. If this attribute is used, the parent menu item must be defined elsewhere in the menuItems configuration of any enabled plugin. You can define this attribute for each section.

    Example menuItems configuration

    dynamicPlugins:
  frontend:
    <package_name>:
      dynamicRoutes:
        - path: /my-plugin
          module: CustomModule
          importName: FooPluginPage
          menuItem:
            icon: fooIcon
            text: Foo Plugin Page
      menuItems:
        my-plugin: # matches `path` in `dynamicRoutes`
          priority: 10 # controls order of plugins under the parent menu item
          parent: favorites # nests this plugin under the `favorites` parent menu item
        favorites: # configuration for the parent menu item
          icon: favorite # icon from RHDH system icons
          title: Favorites # title for the parent menu item
          priority: 100 # controls the order of this top-level menu item
    Copy to Clipboard Toggle word wrap

  2. To ensure that a menu item is identified as a main menu item, you must add the default. prefix to its key. For example:

    Example configuration of main menu items in sidebar navigation

    dynamicPlugins:
  frontend:
    default.main-menu-items: # key for configuring static main menu items
      menuItems:
        default.<menu_item_name>: # key of the menu item configuration. `default.` prefix is required for a main menu item key
    1 
    
          parent: my_menu_group # optional, specifies the parent menu item for this item
          priority: 10 # optional, specifies the order of this menu item within its menu level
        default.<menu_group_parent_item_name>: # must be configured if it is specified as the parent of any menu items. `default.` prefix is required for a main group parent item key
    2 
    
          icon: my_menu_group_icon # required for parent menu items, defines the icon for the menu group
          title: my_menu_group_title # required for parent menu items, defines the icon for the menu group
          priority: 100 # optional, specifies the order of the parent menu item in the sidebar
    Copy to Clipboard Toggle word wrap

    1 2
    The default. prefix identifes an item as a main menu item. You can add the default. prefix to both individual menu items or parent menu group configuration, such as default.<menu_group_parent_item_name> in the previous example.
    Note

    The default priority of main menu items determines their order in the sidebar. You can customize the order of the static main menu items by adjusting their priority values. Ensure that the priority and title of each item is clear to facilitate easy reordering.

You can customize the app title text by setting a value for the title field, as shown in the following example: 

app:
  title: My custom developer hub
# ...
Copy to Clipboard Toggle word wrap

You can customize the color palettes of the light and dark theme modes in your Developer Hub instance by configuring the light.palette and dark.palette parameters in the branding.theme section of the app-config-rhdh.yaml file, as shown in the following example: 

app:
  branding:
    theme:
      light:
        palette:
          primary:
            main: <light_primary_color>
1 

          navigation:
            indicator: <light_indicator_color>
2 

        pageTheme:
          default:
            backgroundColor: [<light_background_color_1>, <light_background_color_2>]
3 

      dark:
        palette:
          primary:
            main: <dark_primary_color>
4 

          navigation:
            indicator: <dark_indicator_color>
5 

        pageTheme:
          default:
            backgroundColor: [<dark_background_color_1>, <dark_background_color_2>]
6 

# ...
Copy to Clipboard Toggle word wrap
1
The main primary color for the light color palette, for example, #ffffff or white
2
The color of the navigation indicator for the light color palette, which is a vertical bar that indicates the selected tab in the navigation panel, for example, #FF0000 or red
3
The background color for the default page theme for the light color palette, for example, #ffffff or white
4
The main primary color for the dark color palette, for example, #000000 or black
5
The color of the navigation indicator for the dark color palette, which is a vertical bar that indicates the selected tab in the navigation panel, for example, #FF0000 or red
6
The background color for the default page theme for the dark color palette, for example, #000000 or black

Additional resources

You can customize the header color for the light and dark theme modes in your Developer Hub instance by modifying the branding.theme section of the app-config-rhdh.yaml file. You can also customize the page headers for additional Developer Hub pages, such as the Home, Catalog, and APIs pages. 

app:
  branding:
    theme:
      light:
1 

        palette: {}
        pageTheme:
          default:
2 

            backgroundColor: "<default_light_background_color>"
3 

            fontColor: "<default_light_font_color>"
4 

            shape: none
5 

          apis:
6 

            backgroundColor: "<apis_light_background_color>"
            fontColor: "<apis_light_font_color>"
            shape: none
      dark:
        palette: {}
        pageTheme:
          default:
            backgroundColor: "<default_dark_background_color>"
            fontColor: "<default_dark_font_color>"
            shape: none
# ...
Copy to Clipboard Toggle word wrap
1
The theme mode, for example, light or dark
2
The yaml header for the default page theme configuration
3
The color of the page header background, for example, #ffffff or white
4
The color of the text in the page header, for example, #000000 or black
5
The pattern on the page header, for example, wave, round, or none
6
The yaml header for a specific page theme configuration, for example, apis, home

You can configure the typography section of the app-config-rhdh.yaml file to change the default font family and size of the page text, as well as the font family and size of each heading level, as shown in the following example: 

app:
  branding:
    theme:
      light:
        typography:
          fontFamily: "Times New Roman"
          htmlFontSize: 11 # smaller is bigger
          h1:
            fontFamily: "Times New Roman"
            fontSize: 40
          h2:
            fontFamily: "Times New Roman"
            fontSize: 30
          h3:
            fontFamily: "Times New Roman"
            fontSize: 30
          h4:
            fontFamily: "Times New Roman"
            fontSize: 30
          h5:
            fontFamily: "Times New Roman"
            fontSize: 30
          h6:
            fontFamily: "Times New Roman"
            fontSize: 30
      dark:
        typography:
          fontFamily: "Times New Roman"
          htmlFontSize: 11 # smaller is bigger
          h1:
            fontFamily: "Times New Roman"
            fontSize: 40
          h2:
            fontFamily: "Times New Roman"
            fontSize: 30
          h3:
            fontFamily: "Times New Roman"
            fontSize: 30
          h4:
            fontFamily: "Times New Roman"
            fontSize: 30
          h5:
            fontFamily: "Times New Roman"
            fontSize: 30
          h6:
            fontFamily: "Times New Roman"
            fontSize: 30
# ...
Copy to Clipboard Toggle word wrap

7.8. Default Red Hat Developer Hub theme
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You can use the default Red Hat Developer Hub theme configurations to make your Developer Hub instance look like a standard Red Hat Developer Hub instance. You can also modify the app-config-rhdh.yaml file to customize or disable particular parameters.

The app-config-rhdh.yaml file uses the following configurations for the default Red Hat Developer Hub color palette: 

app:
  branding:
    theme:
      light:
        variant: "rhdh"
        mode: "light"
        palette:
          background:
            default: "#F8F8F8"
            paper: "#FFFFFF"
          banner:
            closeButtonColor: "#FFFFFF"
            error: "#E22134"
            info: "#2E77D0"
            link: "#000000"
            text: "#FFFFFF"
            warning: "#FF9800"
          border: "#E6E6E6"
          bursts:
            backgroundColor:
              default: "#7C3699"
            fontColor: "#FEFEFE"
            gradient:
              linear: "linear-gradient(-137deg, #4BB8A5 0%, #187656 100%)"
            slackChannelText: "#ddd"
          errorBackground: "#FFEBEE"
          errorText: "#CA001B"
          gold: "#FFD600"
          highlight: "#FFFBCC"
          infoBackground: "#ebf5ff"
          infoText: "#004e8a"
          link: "#0A6EBE"
          linkHover: "#2196F3"
          mode: "light"
          navigation:
            background: "#222427"
            indicator: "#0066CC"
            color: "#ffffff"
            selectedColor: "#ffffff"
            navItem:
              hoverBackground: "#3c3f42"
            submenu:
              background: "#222427"
          pinSidebarButton:
            background: "#BDBDBD"
            icon: "#181818"
          primary:
            main: "#0066CC"
          secondary:
            main: "#8476D1"
          status:
            aborted: "#757575"
            error: "#E22134"
            ok: "#1DB954"
            pending: "#FFED51"
            running: "#1F5493"
            warning: "#FF9800"
          tabbar:
            indicator: "#9BF0E1"
          textContrast: "#000000"
          textSubtle: "#6E6E6E"
          textVerySubtle: "#DDD"
          warningBackground: "#F59B23"
          warningText: "#000000"
          text:
            primary: "#151515"
            secondary: "#757575"
          rhdh:
            general:
              disabledBackground: "#D2D2D2"
              disabled: "#6A6E73"
              searchBarBorderColor: "#E4E4E4"
              formControlBackgroundColor: "#FFF"
              mainSectionBackgroundColor: "#FFF"
              headerBottomBorderColor: "#C7C7C7"
              cardBackgroundColor: "#FFF"
              sideBarBackgroundColor: "#212427"
              cardBorderColor: "#C7C7C7"
              tableTitleColor: "#181818"
              tableSubtitleColor: "#616161"
              tableColumnTitleColor: "#151515"
              tableRowHover: "#F5F5F5"
              tableBorderColor: "#E0E0E0"
              tableBackgroundColor: "#FFF"
              tabsBottomBorderColor: "#D2D2D2"
              contrastText: "#FFF"
            primary:
              main: "#0066CC"
              focusVisibleBorder: "#0066CC"
            secondary:
              main: "#8476D1"
              focusVisibleBorder: "#8476D1"
            cards:
              headerTextColor: "#151515"
              headerBackgroundColor: "#FFF"
              headerBackgroundImage: "none"

      dark:
        variant: "rhdh"
        mode: "dark"
        palette:
          background:
            default: "#333333"
            paper: "#424242"
          banner:
            closeButtonColor: "#FFFFFF"
            error: "#E22134"
            info: "#2E77D0"
            link: "#000000"
            text: "#FFFFFF"
            warning: "#FF9800"
          border: "#E6E6E6"
          bursts:
            backgroundColor:
              default: "#7C3699"
            fontColor: "#FEFEFE"
            gradient:
              linear: "linear-gradient(-137deg, #4BB8A5 0%, #187656 100%)"
            slackChannelText: "#ddd"
          errorBackground: "#FFEBEE"
          errorText: "#CA001B"
          gold: "#FFD600"
          highlight: "#FFFBCC"
          infoBackground: "#ebf5ff"
          infoText: "#004e8a"
          link: "#9CC9FF"
          linkHover: "#82BAFD"
          mode: "dark"
          navigation:
            background: "#0f1214"
            indicator: "#0066CC"
            color: "#ffffff"
            selectedColor: "#ffffff"
            navItem:
              hoverBackground: "#3c3f42"
            submenu:
              background: "#0f1214"
          pinSidebarButton:
            background: "#BDBDBD"
            icon: "#404040"
          primary:
            main: "#1FA7F8"
          secondary:
            main: "#B2A3FF"
          status:
            aborted: "#9E9E9E"
            error: "#F84C55"
            ok: "#71CF88"
            pending: "#FEF071"
            running: "#3488E3"
            warning: "#FFB84D"
          tabbar:
            indicator: "#9BF0E1"
          textContrast: "#FFFFFF"
          textSubtle: "#CCCCCC"
          textVerySubtle: "#727272"
          warningBackground: "#F59B23"
          warningText: "#000000"

          rhdh:
            general:
              disabledBackground: "#444548"
              disabled: "#AAABAC"
              searchBarBorderColor: "#57585a"
              formControlBackgroundColor: "#36373A"
              mainSectionBackgroundColor: "#0f1214"
              headerBottomBorderColor: "#A3A3A3"
              cardBackgroundColor: "#292929"
              sideBarBackgroundColor: "#1b1d21"
              cardBorderColor: "#A3A3A3"
              tableTitleColor: "#E0E0E0"
              tableSubtitleColor: "#E0E0E0"
              tableColumnTitleColor: "#E0E0E0"
              tableRowHover: "#0f1214"
              tableBorderColor: "#515151"
              tableBackgroundColor: "#1b1d21"
              tabsBottomBorderColor: "#444548"
              contrastText: "#FFF"
            primary:
              main: "#1FA7F8"
              focusVisibleBorder: "#ADD6FF"
            secondary:
              main: "#B2A3FF"
              focusVisibleBorder: "#D0C7FF"
            cards:
              headerTextColor: "#FFF"
              headerBackgroundColor: "#0f1214"
              headerBackgroundImage: "none"
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Alternatively, you can use the following variant and mode values in the app-config-rhdh.yaml file to apply the previous default configuration: 

app:
  branding:
    theme:
      light:
        variant: "rhdh"
        mode: "light"
      dark:
        variant: "rhdh"
        mode: "dark"
Copy to Clipboard Toggle word wrap

7.8.2. Default Red Hat Developer Hub page themes
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The default Developer Hub header color is white in light mode and black in dark mode, as shown in the following app-config-rhdh.yaml file configuration: 

app:
  branding:
    theme:
      light:
        palette: {}
        defaultPageTheme: default
        pageTheme:
          default:
            backgroundColor: "#ffffff"
      dark:
        palette: {}
        defaultPageTheme: default
        pageTheme:
          default:
            backgroundColor: "#0f1214"
Copy to Clipboard Toggle word wrap

7.9. Default Backstage theme
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You can use the default Backstage theme configurations to make your Developer Hub instance look like a standard Backstage instance. You can also modify the app-config-rhdh.yaml file to customize or disable particular parameters.

7.9.1. Default Backstage theme color palette
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The app-config-rhdh.yaml file uses the following configurations for the default Backstage color palette: 

app:
  branding:
    theme:
      light:
        variant: "backstage"
        mode: "light"
        palette:
          background:
            default: "#F8F8F8"
            paper: "#FFFFFF"
          banner:
            closeButtonColor: "#FFFFFF"
            error: "#E22134"
            info: "#2E77D0"
            link: "#000000"
            text: "#FFFFFF"
            warning: "#FF9800"
          border: "#E6E6E6"
          bursts:
            backgroundColor:
              default: "#7C3699"
            fontColor: "#FEFEFE"
            gradient:
              linear: "linear-gradient(-137deg, #4BB8A5 0%, #187656 100%)"
            slackChannelText: "#ddd"
          errorBackground: "#FFEBEE"
          errorText: "#CA001B"
          gold: "#FFD600"
          highlight: "#FFFBCC"
          infoBackground: "#ebf5ff"
          infoText: "#004e8a"
          link: "#0A6EBE"
          linkHover: "#2196F3"
          navigation:
            background: "#171717"
            color: "#b5b5b5"
            indicator: "#9BF0E1"
            navItem:
              hoverBackground: "#404040"
            selectedColor: "#FFF"
            submenu:
              background: "#404040"
          pinSidebarButton:
            background: "#BDBDBD"
            icon: "#181818"
          primary:
            main: "#1F5493"
          status:
            aborted: "#757575"
            error: "#E22134"
            ok: "#1DB954"
            pending: "#FFED51"
            running: "#1F5493"
            warning: "#FF9800"
          tabbar:
            indicator: "#9BF0E1"
          textContrast: "#000000"
          textSubtle: "#6E6E6E"
          textVerySubtle: "#DDD"
          warningBackground: "#F59B23"
          warningText: "#000000"

      dark:
        variant: "backstage"
        mode: "dark"
        palette:
          background:
            default: "#333333"
            paper: "#424242"
          banner:
            closeButtonColor: "#FFFFFF"
            error: "#E22134"
            info: "#2E77D0"
            link: "#000000"
            text: "#FFFFFF"
            warning: "#FF9800"
          border: "#E6E6E6"
          bursts:
            backgroundColor:
              default: "#7C3699"
            fontColor: "#FEFEFE"
            gradient:
              linear: "linear-gradient(-137deg, #4BB8A5 0%, #187656 100%)"
            slackChannelText: "#ddd"
          errorBackground: "#FFEBEE"
          errorText: "#CA001B"
          gold: "#FFD600"
          highlight: "#FFFBCC"
          infoBackground: "#ebf5ff"
          infoText: "#004e8a"
          link: "#9CC9FF"
          linkHover: "#82BAFD"
          mode: "dark"
          navigation:
            background: "#424242"
            color: "#b5b5b5"
            indicator: "#9BF0E1"
            navItem:
              hoverBackground: "#404040"
            selectedColor: "#FFF"
            submenu:
              background: "#404040"
          pinSidebarButton:
            background: "#BDBDBD"
            icon: "#404040"
          primary:
            dark: "#82BAFD"
            main: "#9CC9FF"
          secondary:
            main: "#FF88B2"
          status:
            aborted: "#9E9E9E"
            error: "#F84C55"
            ok: "#71CF88"
            pending: "#FEF071"
            running: "#3488E3"
            warning: "#FFB84D"
          tabbar:
            indicator: "#9BF0E1"
          textContrast: "#FFFFFF"
          textSubtle: "#CCCCCC"
          textVerySubtle: "#727272"
          warningBackground: "#F59B23"
          warningText: "#000000"
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Alternatively, you can use the following variant and mode values in the app-config-rhdh.yaml file to apply the previous default configuration: 

app:
  branding:
    theme:
      light:
        variant: "backstage"
        mode: "light"
      dark:
        variant: "backstage"
        mode: "dark"
Copy to Clipboard Toggle word wrap

7.9.2. Default Backstage page themes
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The default Backstage header color is white in light mode and black in dark mode, as shown in the following app-config-rhdh.yaml file configuration: 

app:
  branding:
    theme:
      light:
        palette: {}
        defaultPageTheme: default
        pageTheme:
          default:
            backgroundColor: ['#005B4B'] # teal
            fontColor: '#ffffff'
            shape: wave
          documentation:
            backgroundColor: ['#C8077A', '#C2297D'] # pinkSea
            fontColor: '#ffffff'
            shape: wave2
          tool:
            backgroundColor: ['#8912CA', '#3E00EA'] # purpleSky
            fontColor: '#ffffff'
            shape: round
          service:
            backgroundColor: ['#006D8F', '#0049A1'] # marineBlue
            fontColor: '#ffffff'
            shape: wave
          website:
            backgroundColor: ['#0027AF', '#270094'] # veryBlue
            fontColor: '#ffffff'
            shape: wave
          library:
            backgroundColor: ['#98002B', '#8D1134'] # rubyRed
            fontColor: '#ffffff'
            shape: wave
          other:
            backgroundColor: ['#171717', '#383838'] # darkGrey
            fontColor: '#ffffff'
            shape: wave
          app:
            backgroundColor: ['#BE2200', '#A41D00'] # toastyOrange
            fontColor: '#ffffff'
            shape: shapes.wave
          apis:
            backgroundColor: ['#005B4B'] # teal
            fontColor: '#ffffff'
            shape: wave2
          card:
            backgroundColor: ['#4BB8A5', '#187656'] # greens
            fontColor: '#ffffff'
            shape: wave

      dark:
        palette: {}
        defaultPageTheme: default
        pageTheme:
          default:
            backgroundColor: ['#005B4B'] # teal
            fontColor: '#ffffff'
            shape: wave
          documentation:
            backgroundColor: ['#C8077A', '#C2297D'] # pinkSea
            fontColor: '#ffffff'
            shape: wave2
          tool:
            backgroundColor: ['#8912CA', '#3E00EA'] # purpleSky
            fontColor: '#ffffff'
            shape: round
          service:
            backgroundColor: ['#006D8F', '#0049A1'] # marineBlue
            fontColor: '#ffffff'
            shape: wave
          website:
            backgroundColor: ['#0027AF', '#270094'] # veryBlue
            fontColor: '#ffffff'
            shape: wave
          library:
            backgroundColor: ['#98002B', '#8D1134'] # rubyRed
            fontColor: '#ffffff'
            shape: wave
          other:
            backgroundColor: ['#171717', '#383838'] # darkGrey
            fontColor: '#ffffff'
            shape: wave
          app:
            backgroundColor: ['#BE2200', '#A41D00'] # toastyOrange
            fontColor: '#ffffff'
            shape: shapes.wave
          apis:
            backgroundColor: ['#005B4B'] # teal
            fontColor: '#ffffff'
            shape: wave2
          card:
            backgroundColor: ['#4BB8A5', '#187656'] # greens
            fontColor: '#ffffff'
            shape: wave
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There are two component variants that you can use to customize various components of your Developer Hub theme:

  • Patternfly
  • MUI

In addition to assigning a component variant to each parameter in the light or dark theme mode configurations, you can toggle the rippleEffect on or off.

The following code shows the options that you can use in the app-config-rhdh.yaml file to configure the theme components for your Developer Hub instance: 

app:
  branding:
    theme:
      light:
        options:
          rippleEffect: off / on
          paper: patternfly / mui
          buttons: patternfly / mui
          inputs: patternfly / mui
          accordions: patternfly / mui
          sidebars: patternfly / mui
          pages: patternfly / mui
          headers: patternfly / mui
          toolbars: patternfly / mui
          dialogs: patternfly / mui
          cards: patternfly / mui
          tables: patternfly / mui
          tabs: patternfly / mui
      dark:
        options:
          rippleEffect: off / on
          paper: patternfly / mui
          buttons: patternfly / mui
          inputs: patternfly / mui
          accordions: patternfly / mui
          sidebars: patternfly / mui
          pages: patternfly / mui
          headers: patternfly / mui
          toolbars: patternfly / mui
          dialogs: patternfly / mui
          cards: patternfly / mui
          tables: patternfly / mui
          tabs: patternfly / mui
Copy to Clipboard Toggle word wrap
Important

These features are for Technology Preview only. Technology Preview features are not supported with Red Hat production service level agreements (SLAs), might not be functionally complete, and Red Hat does not recommend using them for production. These features provide early access to upcoming product features, enabling customers to test functionality and provide feedback during the development process.

For more information on Red Hat Technology Preview features, see Technology Preview Features Scope.

In Red Hat Developer Hub, you can access ServiceNow custom actions (custom actions) for fetching and registering resources in the catalog.

The custom actions in Developer Hub enable you to facilitate and automate the management of records. Using the custom actions, you can perform the following actions:

  • Create, update, or delete a record
  • Retrieve information about a single record or multiple records

In Red Hat Developer Hub, the ServiceNow custom actions are provided as a pre-loaded plugin, which is disabled by default. You can enable the custom actions plugin using the following procedure.

Prerequisites

  • Red Hat Developer Hub is installed and running.

For more information about installing the Developer Hub, see Installing Red Hat Developer Hub on OpenShift Container Platform with the Helm chart.

  • You have created a project in the Developer Hub.

Procedure

  1. To activate the custom actions plugin, add a package with plugin name and update the disabled field in your Helm Chart as follows: 

    global:
  dynamic:
    includes:
      - dynamic-plugins.default.yaml
    plugins:
      - package: ./dynamic-plugins/dist/janus-idp-backstage-scaffolder-backend-module-servicenow-dynamic
        disabled: false
    Copy to Clipboard Toggle word wrap
    Note

    The default configuration for a plugin is extracted from the dynamic-plugins.default.yaml file, however, you can use a pluginConfig entry to override the default configuration.

  2. Set the following variables in the Helm Chart to access the custom actions: 

    servicenow:
  # The base url of the ServiceNow instance.
  baseUrl: ${SERVICENOW_BASE_URL}
  # The username to use for authentication.
  username: ${SERVICENOW_USERNAME}
  # The password to use for authentication.
  password: ${SERVICENOW_PASSWORD}
    Copy to Clipboard Toggle word wrap

The ServiceNow custom actions enable you to manage records in the Red Hat Developer Hub. The custom actions support the following HTTP methods for API requests:

  • GET: Retrieves specified information from a specified resource endpoint
  • POST: Creates or updates a resource
  • PUT: Modify a resource
  • PATCH: Updates a resource
  • DELETE: Deletes a resource

8.2.1. ServiceNow custom actions
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[GET] servicenow:now:table:retrieveRecord

Retrieves information of a specified record from a table in the Developer Hub.

Expand
Table 8.1. Input parameters
NameTypeRequirementDescription

tableName

string

Required

Name of the table to retrieve the record from

sysId

string

Required

Unique identifier of the record to retrieve

sysparmDisplayValue

enum("true", "false", "all")

Optional

Returns field display values such as true, actual values as false, or both. The default value is false.

sysparmExcludeReferenceLink

boolean

Optional

Set as true to exclude Table API links for reference fields. The default value is false.

sysparmFields

string[]

Optional

Array of fields to return in the response

sysparmView

string

Optional

Renders the response according to the specified UI view. You can override this parameter using sysparm_fields.

sysparmQueryNoDomain

boolean

Optional

Set as true to access data across domains if authorized. The default value is false.

Expand
Table 8.2. Output parameters
NameTypeDescription

result

Record<PropertyKey, unknown>

The response body of the request

[GET] servicenow:now:table:retrieveRecords

Retrieves information about multiple records from a table in the Developer Hub.

Expand
Table 8.3. Input parameters
NameTypeRequirementDescription

tableName

string

Required

Name of the table to retrieve the records from

sysparamQuery

string

Optional

Encoded query string used to filter the results

sysparmDisplayValue

enum("true", "false", "all")

Optional

Returns field display values such as true, actual values as false, or both. The default value is false.

sysparmExcludeReferenceLink

boolean

Optional

Set as true to exclude Table API links for reference fields. The default value is false.

sysparmSuppressPaginationHeader

boolean

Optional

Set as true to suppress pagination header. The default value is false.

sysparmFields

string[]

Optional

Array of fields to return in the response

sysparmLimit

int

Optional

Maximum number of results returned per page. The default value is 10,000.

sysparmView

string

Optional

Renders the response according to the specified UI view. You can override this parameter using sysparm_fields.

sysparmQueryCategory

string

Optional

Name of the query category to use for queries

sysparmQueryNoDomain

boolean

Optional

Set as true to access data across domains if authorized. The default value is false.

sysparmNoCount

boolean

Optional

Does not execute a select count(*) on the table. The default value is false.

Expand
Table 8.4. Output parameters
NameTypeDescription

result

Record<PropertyKey, unknown>

The response body of the request

[POST] servicenow:now:table:createRecord

Creates a record in a table in the Developer Hub.

Expand
Table 8.5. Input parameters
NameTypeRequirementDescription

tableName

string

Required

Name of the table to save the record in

requestBody

Record<PropertyKey, unknown>

Optional

Field name and associated value for each parameter to define in the specified record

sysparmDisplayValue

enum("true", "false", "all")

Optional

Returns field display values such as true, actual values as false, or both. The default value is false.

sysparmExcludeReferenceLink

boolean

Optional

Set as true to exclude Table API links for reference fields. The default value is false.

sysparmFields

string[]

Optional

Array of fields to return in the response

sysparmInputDisplayValue

boolean

Optional

Set field values using their display value such as true or actual value as false. The default value is false.

sysparmSuppressAutoSysField

boolean

Optional

Set as true to suppress auto-generation of system fields. The default value is false.

sysparmView

string

Optional

Renders the response according to the specified UI view. You can override this parameter using sysparm_fields.

Expand
Table 8.6. Output parameters
NameTypeDescription

result

Record<PropertyKey, unknown>

The response body of the request

[PUT] servicenow:now:table:modifyRecord

Modifies a record in a table in the Developer Hub.

Expand
Table 8.7. Input parameters
NameTypeRequirementDescription

tableName

string

Required

Name of the table to modify the record from

sysId

string

Required

Unique identifier of the record to modify

requestBody

Record<PropertyKey, unknown>

Optional

Field name and associated value for each parameter to define in the specified record

sysparmDisplayValue

enum("true", "false", "all")

Optional

Returns field display values such as true, actual values as false, or both. The default value is false.

sysparmExcludeReferenceLink

boolean

Optional

Set as true to exclude Table API links for reference fields. The default value is false.

sysparmFields

string[]

Optional

Array of fields to return in the response

sysparmInputDisplayValue

boolean

Optional

Set field values using their display value such as true or actual value as false. The default value is false.

sysparmSuppressAutoSysField

boolean

Optional

Set as true to suppress auto-generation of system fields. The default value is false.

sysparmView

string

Optional

Renders the response according to the specified UI view. You can override this parameter using sysparm_fields.

sysparmQueryNoDomain

boolean

Optional

Set as true to access data across domains if authorized. The default value is false.

Expand
Table 8.8. Output parameters
NameTypeDescription

result

Record<PropertyKey, unknown>

The response body of the request

[PATCH] servicenow:now:table:updateRecord

Updates a record in a table in the Developer Hub.

Expand
Table 8.9. Input parameters
NameTypeRequirementDescription

tableName

string

Required

Name of the table to update the record in

sysId

string

Required

Unique identifier of the record to update

requestBody

Record<PropertyKey, unknown>

Optional

Field name and associated value for each parameter to define in the specified record

sysparmDisplayValue

enum("true", "false", "all")

Optional

Returns field display values such as true, actual values as false, or both. The default value is false.

sysparmExcludeReferenceLink

boolean

Optional

Set as true to exclude Table API links for reference fields. The default value is false.

sysparmFields

string[]

Optional

Array of fields to return in the response

sysparmInputDisplayValue

boolean

Optional

Set field values using their display value such as true or actual value as false. The default value is false.

sysparmSuppressAutoSysField

boolean

Optional

Set as true to suppress auto-generation of system fields. The default value is false.

sysparmView

string

Optional

Renders the response according to the specified UI view. You can override this parameter using sysparm_fields.

sysparmQueryNoDomain

boolean

Optional

Set as true to access data across domains if authorized. The default value is false.

Expand
Table 8.10. Output parameters
NameTypeDescription

result

Record<PropertyKey, unknown>

The response body of the request

[DELETE] servicenow:now:table:deleteRecord

Deletes a record from a table in the Developer Hub.

Expand
Table 8.11. Input parameters
NameTypeRequirementDescription

tableName

string

Required

Name of the table to delete the record from

sysId

string

Required

Unique identifier of the record to delete

sysparmQueryNoDomain

boolean

Optional

Set as true to access data across domains if authorized. The default value is false.

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The text of and illustrations in this document are licensed by Red Hat under a Creative Commons Attribution–Share Alike 3.0 Unported license ("CC-BY-SA"). An explanation of CC-BY-SA is available at http://creativecommons.org/licenses/by-sa/3.0/. In accordance with CC-BY-SA, if you distribute this document or an adaptation of it, you must provide the URL for the original version.
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