express-generator-typescript-k8s

Express with TypeScript's application generator.

Quick Start

The quickest way to get started is by using npx and pass in the name of the project you want to create. If you don't specify a project name, the default express-gen-ts-k8s will be used instead.

Create the app:

$ npx express-generator-typescript-k8s "myApp" # default name is express-gen-ts-k8s" 

If you want the OpenAPI spec and Swagger UI:

$ npx express-generator-typescript-k8s --openAPI "myApp"

Start your newly generaed app in development mode at http://localhost:3000/:

$ cd "myApp" && npm run start:dev

make a Rest call either from the sample webapp, or using curl:

curl http://localhost:3000/api/deployments

What is it?

Creates a new express application similar to the express-generator module. Except this new application is configured to use TypeScript instead of plain JavaScript. This simple application is pre-configured to use kubernetes client.

It contains a simple REST endpoint for working with deployments in the Kubernetes cluster. Part of the application is a very simple web ui that lists the deployments and allows to delete a deployment. You should be able to see the same deployments as your kubectl get deployments command. The k8s client has the auto-configure capability so that it reads the information about the cluster and the baerer token from the kubeconfig or from the correct location (mounted secrets w/ the token and CA cert) when running on a pod in k8s cluster.

This project is based on a repo express-generator-typescript created by Sean Maxwell and adds the Kubernetes example on top of it (also some other changes). The license remains the same.

Why express-generator-typescript-k8s?

NodeJS is great for the rapid development of web-projects, but is often neglected because of the lack of type safety. TypeScript solves this issue and (along with its linter file) can even make your code more robust than some other static languages like Java.

There are some other tools out there to generate express apps with TypeScript such as express-generator-ts, but these either haven't been updated in a while or install a lot of junk in your project (such as an ORM).

Due to the heavy use of single-page-applications, no view-engine is configured by default. Express is only setup with the minimal settings for calling APIs and serving an index.html file. All the tools you need to run for development (while restarting on changes), building, testing, and running for production are packaged with this library.

In addition, relative paths are also setup, so you don't have to go through the trouble of installing and configuring tsconfig-paths and module-alias. Just make sure to update paths in tsconfig.json and _moduleAliases in package.json if you want to add/edit the relative paths.

Sample-project

When you run express-generator-typescript-k8s, it sets up a very simple application with routes for adding, updating, deleting, and fetching deployment objects. This is just to demonstrate how routing is done with express.

Installation

$ Just use 'npx'
  Or
$ npm install -g express-generator-typescript-k8s

Available commands for the server.

• Run the server in development mode: npm run start:dev.
• Run all unit-tests: npm test.
• Check for linting errors: npm run lint.
• Build the project for production: npm run build.
• Run the production build: npm start.
• Run production build with a different env file npm start -- --env="name of env file" (default is production).

Debugging

During development, express-generator-typescript-k8s uses nodemon to restart the server when changes are detected. If you want to enable debugging for node, you'll need to modify the nodemon configurations. This is located under nodemonConfig: in package.json for the server and ./spec/nodemon.json for unit-testing. For the exec property, replace ts-node with node --inspect -r ts-node/register.

Happy web-deving :)

License

MIT