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Example apps

Playwright (Firefox) with Node.js

Playwright is a framework for web testing and Automation.

To run this example, follow these steps:

1. Install the unikraft CLI. You need a BuildKit builder. The easiest way to get one is via Docker. Alternatively, you can also directly set up and use BuildKit, see the quick start.

2. Clone the examples repository and cd into the examples/node-playwright-firefox/ directory:

   Code
   git clone https://github.com/unikraft-cloud/examples
   cd examples/node-playwright-firefox/

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

Code
unikraft login

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

Code
unikraft build . --output <my-org>/node-playwright-firefox:latest
unikraft run --metro fra \
  -m 4G \
  -p 443:8080/tls+http \
  --scale-to-zero policy=idle,cooldown-time=1000,stateful=true \
  --image <my-org>/node-playwright-firefox:latest

The output shows the instance address and other details:

Code
metro:        fra
name:         node-playwright-firefox-q3m9k
uuid:         d4e5f6a7-b8c9-0d1e-2f3a-d4e5f6a7b8c9
state:        starting
image:        <my-org>/node-playwright-firefox
resources:
  memory:     4096MiB
  vcpus:      1
service:
  uuid:       e5f6a7b8-c9d0-1e2f-3a4b-e5f6a7b8c9d0
  name:       bright-lake-dh6xp2sq
  domains:
  - fqdn:     bright-lake-dh6xp2sq.fra.unikraft.app
networks:
- uuid:       f6a7b8c9-d0e1-2f3a-4b5c-f6a7b8c9d0e1
  private-ip: 10.0.5.3
  mac:        12:b0:9f:6b:de:c8
timestamps:
  created:    just now

In this case, the instance name is node-playwright-firefox-q3m9k and the address is https://bright-lake-dh6xp2sq.fra.unikraft.app. They're different for each run.

The command will deploy the files in the current directory. It results in the creation of a remote web-based service for creating PNG screenshots of remote pages.

Use the ?page=<REMOTE_URL> to point the service to the remote page to screenshot. Query the service using commands such as:

Code
curl "https://<NAME>.<METRO>.unikraft.app/?page=https://google.com" -o ss-google.png
curl "https://<NAME>.<METRO>.unikraft.app/?page=https://bing.com" -o ss-bing.png

You can list information about the instance by running:

Code
unikraft instances list

Code
METRO  NAME                           STATE    IMAGE                             ARGS  MEMORY   VCPUS  FQDN                                   CREATED
fra    node-playwright-firefox-q3m9k  running  <my-org>/node-playwright-firefox        4096MiB  1      bright-lake-dh6xp2sq.fra.unikraft.app  2 minutes ago

When done, you can remove the instance:

Code
unikraft instances delete <instance-name>

Learn more

• Playwright's Documentation
• Unikraft Cloud's Documentation
• Building Dockerfile Images with Buildkit

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

Code
unikraft --help

Or visit the CLI Reference.