Image Builder Frontend

Frontend code for Image Builder.

Project

• Website: https://www.osbuild.org
• Bug Tracker: https://github.com/osbuild/image-builder-frontend/issues
• Discussions: https://github.com/orgs/osbuild/discussions
• Matrix: #image-builder on fedoraproject.org

Principles

1. We want to use the latest and greatest web technologies.
2. We want to expose all the options and customizations possible, even if not all are visible by default.
3. The default path should be ‘short(est)’ clickpath, which should be determined in a data-driven way.
4. This is an Insights application, so it abides by some rules and standards of Insights.

Table of Contents

1. How to build and run image-builder-frontend
   1. Frontend Development
   2. Image builder as Cockpit plugin
   3. Backend Development
2. API
3. Unleash feature flags
4. File structure
5. Style Guidelines
6. Test Guidelines
7. Running hosted service Playwright tests

How to build and run image-builder-frontend

Important

Running image-builder-frontend against console.redhat.com requires connection to the Red Hat VPN, which is only available to Red Hat employees. External contributors can locally run image builder as Cockpit plugin.

Frontend Development

To develop the frontend you can use a proxy to run image-builder-frontend locally against the chrome and backend at console.redhat.com.

Working against the production environment is preferred, as any work can be released without worrying if a feature from stage has been released yet.

Nodejs and npm version

Make sure you have npm@10 and node 22+ installed. If you need multiple versions of nodejs check out nvm.

Webpack proxy

1. run npm ci

2. run npm run start:prod

3. redirect prod.foo.redhat.com to localhost, if this has not been done already

echo "127.0.0.1 prod.foo.redhat.com" >> /etc/hosts

4. open browser at https://prod.foo.redhat.com:1337/beta/insights/image-builder

Webpack proxy (staging) -- Runs with image-builder's stage deployment

1. run npm ci

2. run npm run start:stage

3. redirect stage.foo.redhat.com to localhost, if this has not been done already

echo "127.0.0.1 stage.foo.redhat.com" >> /etc/hosts

4. open browser at https://stage.foo.redhat.com:1337/beta/insights/image-builder

Image builder as Cockpit plugin

Note

Issues marked with cockpit-image-builder label are reproducible in image builder plugin and can be worked on by external contributors without connection to the Red Hat VPN.

Cockpit setup

To install and setup Cockpit follow guide at: https://cockpit-project.org/running.html

On-premises image builder installation and configuration

To install and configure osbuild-composer on your local machine follow our documentation: https://osbuild.org/docs/on-premises/installation/

Scripts for local development of image builder plugin

The following scripts are used to build the frontend with Webpack and install it into the Cockpit directories. These scripts streamline the development process by automating build and installation steps.

Runs Webpack with the specified configuration (cockpit/webpack.config.ts) to build the frontend assets. Use this command whenever you need to compile the latest changes in your frontend code.

Creates the necessary directory in the user's local Cockpit share (~/.local/share/cockpit/). Creates a symbolic link (image-builder-frontend) pointing to the built frontend assets (cockpit/public). Use this command after building the frontend to install it locally for development purposes. The symbolic link allows Cockpit to serve the frontend assets from your local development environment, making it easier to test changes in real-time without deploying to a remote server.

make cockpit/build

make cockpit/devel-install

To uninstall and remove the symbolic link, run the following command:

make cockpit/devel-uninstall

For convenience, you can run the following to combine all three steps:

make cockpit/devel

Backend Development

To develop both the frontend and the backend you can again use the proxy to run both the frontend and backend locally against the chrome at cloud.redhat.com. For instructions see the osbuild-getting-started project.

API endpoints

API slice definitions are programmatically generated using the @rtk-query/codegen-openapi package.

OpenAPI schema for the endpoints are stored in /api/schema. Their corresponding configuration files are stored in /api/config. Each endpoint has a corresponding empty API slice and generated API slice which are stored in /src/store.

Add a new API schema

For a hypothetical API called foobar

1. Download the foobar API OpenAPI json or yaml representation under api/schema/foobar.json

2. Create a new "empty" API file under src/store/emptyFoobarApi.ts that has following content:

import { createApi, fetchBaseQuery } from '@reduxjs/toolkit/query/react';

import { FOOBAR_API } from '../constants';

// initialize an empty api service that we'll inject endpoints into later as needed
export const emptyFoobarApi = createApi({
  reducerPath: 'foobarApi',
  baseQuery: fetchBaseQuery({ baseUrl: window.location.origin + FOO_BAR }),
  endpoints: () => ({}),
});

3. Declare new constant FOOBAR_API with the API url in src/constants.ts

export const FOOBAR_API = 'api/foobar/v1'

4. Create the config file for code generation in api/config/foobar.ts containing:

import type { ConfigFile } from '@rtk-query/codegen-openapi';

const config: ConfigFile = {
  schemaFile: '../schema/foobar.json',
  apiFile: '../../src/store/emptyFoobarApi.ts',
  apiImport: 'emptyEdgeApi',
  outputFile: '../../src/store/foobarApi.ts',
  exportName: 'foobarApi',
  hooks: true,
  filterEndpoints: ['getFoo', 'getBar', 'getFoobar'],
};

5. Update the api.sh script by adding a new line for npx to generate the code:

npx @rtk-query/codegen-openapi ./api/config/foobar.ts &

6. Update the eslint.config.js file by adding the generated code path to the ignores array:

ignores: [
   <other ignored files>,
  '**/foobarApi.ts',
]

7. run api generation

npm run api

And voilà!

Add a new endpoint

To add a new endpoint, simply update the api/config/foobar.ts file with new endpoints in the filterEndpoints table.

Unleash feature flags

Your user needs to have the corresponding rights, do the same as this MR in internal gitlab https://gitlab.cee.redhat.com/service/app-interface/-/merge_requests/79225 you can ask on the slack channel https://redhat-internal.slack.com/archives/C023YSA47A4 for a merge if your MR stays unchecked for a little while.

Then connect to the following platforms:

• https://insights-stage.unleash.devshift.net/ for stage
• https://insights.unleash.devshift.net prod

Once you have a toggle to work with, on the frontend code there's just need to import the useFlag hook and to use it. You can get some inspiration from existing flags:

https://github.com/RedHatInsights/image-builder-frontend/blob/c84b493eba82ce83a7844943943d91112ffe8322/src/Components/ImagesTable/ImageLink.js#L99

Mocking flags for tests

Flags can be mocked for the unit tests to access some feature. Checkout: https://github.com/osbuild/image-builder-frontend/blob/9a464e416bc3769cfc8e23b62f1dd410eb0e0455/src/test/Components/CreateImageWizard/CreateImageWizard.test.tsx#L49

If the two possible code path accessible via the toggles are defined in the code base, then it's good practice to test the two of them. If not, only test what's actually owned by the frontend project.

Cleaning the flags

Unleash toggles are expected to live for a limited amount of time, documentation specify 40 days for a release, we should keep that in mind for each toggle we're planning on using.

File Structure

Quick Reference

Directory	Description
/api	API schema and config files
/config	webpack configuration
/src	source code
/src/Components	source code split by individual components
/src/test	test utilities
/src/test/mocks	mock handlers and server config for MSW
/src/store	Redux store

Style Guidelines

This project uses recommended rule sets rom several plugins:

• @eslint/js
• typescript-eslint
• eslint-plugin-react
• eslint-plugin-react-hooks
• eslint-plugin-react-redux
• eslint-plugin-import
• eslint-plugin-jsx-a11y
• eslint-plugin-disable-autofix
• eslint-plugin-jest-dom
• eslint-plugin-testing-library
• eslint-plugin-playwright
• @redhat-cloud-services/eslint-config-redhat-cloud-services

To run the linter, use:

npm run lint

Any errors that can be fixed automatically, can be corrected by running:

npm run lint:js:fix

All the linting rules and configuration of ESLint can be found in eslint.config.js.

Test Guidelines

This project is tested using the Vitest framework, React Testing Library, and the Mock Service Worker library.

All UI contributions must also include a new test or update an existing test in order to maintain code coverage.

Running the tests

To run the unit tests, the linter, and the code coverage check run:

npm run test

These tests will also be run in our CI when a PR is opened.

Note that testing-library DOM printout is currently disabled for all tests by the following configuration in src/test/setup.ts:

configure({
  getElementError: (message: string) => {
    const error = new Error(message);
    error.name = 'TestingLibraryElementError';
    error.stack = '';
    return error;
  },
});

If you'd like to see the stack printed out you can either temporarily disable the configuration or generate a Testing Playground link by adding screen.logTestingPlaygroundURL() to your test.

Using MSW data in development - CURRENTLY NOT WORKING

If you want to develop in environment with mocked data, run the command npm run stage-beta:msw.

Enabling MSW

In a case you're seeing Error: [MSW] Failed to register the Service Worker in console, you might also need to configure SSL certification on your computer.

In order to do this install mkcert

After the installation, go to the /node_modules/.cache/webpack-dev-server folder and run following commands:

1. mkcert -install  to create a new certificate authority on your machine
2. mkcert prod.foo.redhat.com  to create the actual signed certificate

Mac Configuration

Follow these steps to find and paste the certification file into the 'Keychain Access' application:

1. Open the 'Keychain Access' application.

2. Select 'login' on the left side.

3. Navigate to the 'Certificates' tab.

4. Drag the certification file (located at /image-builder-frontend/node_modules/.cache/webpack-dev-server/server.pem) to the certification list.

5. Double-click on the added certificate (localhost certificate) to open the localhost window.

6. Open the 'Trust' dropdown menu.

7. Set all options to 'Always Trust'.

8. Close the localhost screen.

9. Run npm run stage-beta:msw and open the Firefox browser to verify that it is working as expected.

Running hosted service Playwright tests

1. Copy the example env file content and create a file named .env in the root directory of the project. Paste the example file content into it. For local development fill in the:

   • BASE_URL - https://stage.foo.redhat.com:1337 is required, which is already set in the example config
   • PLAYWRIGHT_USER - your consoledot stage username
   • PLAYWRIGHT_PASSWORD - your consoledot stage password

2. Make sure Playwright is installed as a dev dependency

   npm ci

3. Download the Playwright browsers with

   npx playwright install

4. Start the local development stage server by running

   npm run start:stage

5. Now you have two options of how to run the tests:

   • (Preferred) Use VS Code and the Playwright Test module for VSCode. But other editors do have similar plugins for ease of use, if so desired
   • Using terminal - npx playwright test will run the playwright test suite. npx playwright test --headed will run the suite in a vnc-like browser so you can watch it's interactions.