Get started with Score

  2 minute read  

Overview

If you’re new to Score, we recommend starting with the score-compose reference implementation. It provides a helpful blueprint for using Score and allows you to become familiar with the Score specification before exploring further implementation options.

Hello world with score-compose

1. To begin, follow the installation instructions to install the latest version of score-compose.

2. Open your IDE and paste in the following score.yaml file, which describes a simple service based on a busybox Docker image:

apiVersion: score.dev/v1b1

metadata:
  name: hello-world

containers:
  hello:
    image: busybox
    command: ["/bin/sh"]
    args: ["-c", "while true; do echo Hello World!; sleep 5; done"]

3. To convert the score.yaml file into runnable compose.yaml, run the following commands in your terminal:

$ score-compose init
$ score-compose generate score.yaml

The init will create the .score-compose directory. The generate command will add the input score.yaml workload to the .score-compose/state.yaml state file and regenerate the output compose.yaml.

$ cat compose.yaml
name: 01-hello
services:
    hello-world-hello:
        command:
            - -c
            - while true; do echo Hello World!; sleep 5; done
        entrypoint:
            - /bin/sh
        image: busybox

If you make any modifications to the score.yaml file, run score-compose generate score.yaml to regenerate the output.

4. Run docker compose up to execute the newly generated compose.yaml file:

$ docker compose up -d
[+] Running 1/2
 ⠼ Network 01-hello_default                Created
 ✔ Container 01-hello-hello-world-hello-1  Started
$ docker logs -f 01-hello-hello-world-hello-1
Hello World!
Hello World!
Hello World!
Hello World!
^C%
$ docker compose down

Congrats! You’ve successfully run your first Score Implementation with a Hello World workload and provisioned it through Docker.

Next steps

  • Explore more examples: Check out the examples folder for score-compose to dive into further use cases and experiment with different configurations.

  • Learn more about score-compose: Investigate the inner workings of the score-compose reference implementation by exploring its CLI reference here.

  • Explore other implementations: Play around with other available open-source Score implementations. For example, you could continue by running the same Score file used in the example above via the score-k8s CLI to generate a Kubernetes manifest.

  • Join the Score community Slack: If you encounter any issues or have questions, feel free to reach out to us in the Score channel on the CNCF Slack (https://slack.cncf.io/).