action.yml

name: 'Hetzner Cloud Self-Hosted Runner for GitHub CI'
description: 'Automatically start cloud instances in the Hetzner Cloud as self-hosted runners for GitHub repositories.'
inputs:
  hetzner-api-key:
    description: 'API key for the Hetzner Cloud'
    required: true
  hetzner-instance-type:
    description: 'Name of Hetzner instance type to be created e.g. cx11. See https://docs.hetzner.cloud/#server-types-get-all-server-types'
    required: true
  hetzner-location:
    description: 'Location ID where cloud instance should be created. In case of `auto` the Hetzner API will decide'
    default: 'auto'
  hetzner-ssh-key-id:
    description: If set deploys this SSH key ID to the server for debugging purposes
    required: false
  hetzner-name-prefix:
    description: 'Prefix for random generated server names'
    default: 'github-ci-runner'
  github-api-key:
    description: 'GitHub API key that is needed to register a new self-hosted runner'
    required: true
runs:
  using: "composite"
  steps:
    - name: Generate GitHub runner token
      id: create-github-runner-token
      run: echo "github_runner_token=$(${{ github.action_path }}/create-github-runner-token.sh ${{ github.repository }} ${{ inputs.github-api-key }})" >> $GITHUB_OUTPUT
      shell: bash
    - name: Make sure that temp is created
      run: mkdir -p ${{ runner.temp }}
      shell: bash
    - name: Generate cloud-init.yml
      run: ${{ github.action_path }}/prepare-cloud-init.sh "${{ github.server_url }}/${{ github.repository }}" ${{ steps.create-github-runner-token.outputs.github_runner_token }} ${{ inputs.hetzner-api-key }} ${{ runner.temp }}/hetzner-ci-cloud-init.yml
      shell: bash
    - name: Create instance in the Hetzner Cloud
      run: ${{ github.action_path }}/create-hetzner-instance.sh ${{ inputs.hetzner-api-key }} ${{ inputs.hetzner-instance-type }} ${{ inputs.hetzner-location }} ${{ inputs.hetzner-name-prefix }} ${{ runner.temp }}/hetzner-ci-cloud-init.yml ${{ inputs.hetzner-ssh-key-id}}
      shell: bash
    - name: Cleanup
      run: rm ${{ runner.temp }}/hetzner-ci-cloud-init.yml
      shell: bash