Guides

Node AllKaraoke

Allkaraoke offers an ultrastar deluxe-like online platform for karaoke.

To run this example, follow these steps:

Install the CLI and a container runtime engine, for example Docker. Use the unikraft CLI or the legacy kraft CLI.
Clone the examples repository and cd into the examples/node24-karaoke directory:

Code
git clone https://github.com/unikraft-cloud/examples
cd examples/node24-karaoke/

Make sure to log into Unikraft Cloud and pick a metro close to you. This guide uses fra (Frankfurt, 🇩🇪):

When done, invoke the following command to deploy this app on Unikraft Cloud:

The output shows the instance address and other details:

Code
[●] Deployed successfully!
 │
 ├────────── name: node24-karaoke-9lw5q
 ├────────── uuid: e5f6a7b8-c9d0-1234-efab-345678901234
 ├───────── state: starting
 ├──────── domain: https://wild-song-p5q2nrwx.fra.unikraft.app
 ├───────── image: node24-karaoke@sha256:1a3c5e7b9d2f4a6c8e0b2d4f6a8c0e2b4d6f8a0b2c4e6f8a0b2d4f6a8c0e2b
 ├──────── memory: 2 GiB
 ├─────── service: wild-song-p5q2nrwx
 ├── private fqdn: node24-karaoke-9lw5q.internal
 ├──── private ip: 172.16.3.8
 └────────── args: /entrypoint.sh

In this case, the instance name is node24-karaoke-9lw5q and the address is https://wild-song-p5q2nrwx.fra.unikraft.app. They're different for each run.

Use curl to query the Unikraft Cloud instance of the AllKaraoke instance:

Code
curl https://wild-song-p5q2nrwx.fra.unikraft.app

Code
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <link rel="icon" href="/favicon.ico" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <title>AllKaraoke.Party - Free Online Karaoke</title>
    ...
  </head>
  ...
</html>

You can list information about the instance by running:

Code
NAME                  FQDN                                 STATE    STATUS       IMAGE                                    MEMORY  VCPUS  ARGS            BOOT TIME
node24-karaoke-9lw5q  wild-song-p5q2nrwx.fra.unikraft.app  running  since 3mins  node24-karaoke@sha256:1a3c5e7b9d2f4a...  2 GiB   1      /entrypoint.sh  1.24 s

When done, you can remove the instance:

Customize your app

To customize the app, update the files in the repository, listed below:

Kraftfile: the Unikraft Cloud specification
Dockerfile: the Docker-specified app filesystem
entrypoint.sh: the shell script used to start the AllKaraoke server

Lines in the Kraftfile have the following roles:

spec: v0.6: The current Kraftfile specification version is 0.6.
runtime: base-compat:latest: The kernel to use.
rootfs: ./Dockerfile: Build the app root filesystem using the Dockerfile.
cmd: ["/entrypoint.sh"]: Use /entrypoint.sh as the starting command of the instance.

Lines in the Dockerfile have the following roles:

FROM node:24-bookworm-slim AS build: Build the AllKaraoke project using the Node.js 24 Bookworm slim image.
RUN git clone ...; pnpm install; pnpm build: Clone the AllKaraoke repository, install dependencies, and build it for production.
FROM node:24-bookworm-slim AS prod: Use a fresh Node.js 24 Bookworm slim image for the runtime.
COPY ...: Copy required files to the app filesystem: the node binary executable, system libraries, the built AllKaraoke artifacts, and the entrypoint script.

The following options are available for customizing the app:

If you want to use a specific version of AllKaraoke, update the git clone command in the Dockerfile to pin a particular commit or tag.
If you want to add extra files, you need to copy them into the filesystem using the COPY command in the Dockerfile.
If you want to change the startup behavior, update the entrypoint.sh script.
More extensive changes may require extending the Dockerfile (see Dockerfile syntax reference).

Learn more

Use the --help option for detailed information on using Unikraft Cloud:

Or visit the CLI Reference or the legacy CLI Reference.

Edit this page

Last modified on April 10, 2026

Nginx Node HTTP Server

Code

[●] Deployed successfully!
 │
 ├────────── name: node24-karaoke-9lw5q
 ├────────── uuid: e5f6a7b8-c9d0-1234-efab-345678901234
 ├───────── state: starting
 ├──────── domain: https://wild-song-p5q2nrwx.fra.unikraft.app
 ├───────── image: node24-karaoke@sha256:1a3c5e7b9d2f4a6c8e0b2d4f6a8c0e2b4d6f8a0b2c4e6f8a0b2d4f6a8c0e2b
 ├──────── memory: 2 GiB
 ├─────── service: wild-song-p5q2nrwx
 ├── private fqdn: node24-karaoke-9lw5q.internal
 ├──── private ip: 172.16.3.8
 └────────── args: /entrypoint.sh

Code

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <link rel="icon" href="/favicon.ico" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <title>AllKaraoke.Party - Free Online Karaoke</title>
    ...
  </head>
  ...
</html>

Code

NAME                  FQDN                                 STATE    STATUS       IMAGE                                    MEMORY  VCPUS  ARGS            BOOT TIME
node24-karaoke-9lw5q  wild-song-p5q2nrwx.fra.unikraft.app  running  since 3mins  node24-karaoke@sha256:1a3c5e7b9d2f4a...  2 GiB   1      /entrypoint.sh  1.24 s

Customize your app

To customize the app, update the files in the repository, listed below:

Kraftfile: the Unikraft Cloud specification

Dockerfile: the Docker-specified app filesystem

entrypoint.sh: the shell script used to start the AllKaraoke server

Lines in the Kraftfile have the following roles:

spec: v0.6: The current Kraftfile specification version is 0.6.

runtime: base-compat:latest: The kernel to use.

rootfs: ./Dockerfile: Build the app root filesystem using the Dockerfile.

cmd: ["/entrypoint.sh"]: Use /entrypoint.sh as the starting command of the instance.

Lines in the Dockerfile have the following roles:

FROM node:24-bookworm-slim AS build: Build the AllKaraoke project using the Node.js 24 Bookworm slim image.

RUN git clone ...; pnpm install; pnpm build: Clone the AllKaraoke repository, install dependencies, and build it for production.

FROM node:24-bookworm-slim AS prod: Use a fresh Node.js 24 Bookworm slim image for the runtime.

COPY ...: Copy required files to the app filesystem: the node binary executable, system libraries, the built AllKaraoke artifacts, and the entrypoint script.

The following options are available for customizing the app:

If you want to use a specific version of AllKaraoke, update the git clone command in the Dockerfile to pin a particular commit or tag.

If you want to add extra files, you need to copy them into the filesystem using the COPY command in the Dockerfile.

If you want to change the startup behavior, update the entrypoint.sh script.

More extensive changes may require extending the Dockerfile (see Dockerfile syntax reference).