start-oracle-cloud-runners/action.yml

name: On-demand self hosted OCI runners for GitHub Actions
description: Creates self-hosted runners in Oracle Cloud Infrastructure
inputs:
  github-token:
    description: 'GitHub token to authenticate the requests'  
    required: true
  oci-compartment-ocid:
    description: The compartment OCID where to start the runners.
    required: true
  oci-subnet-ocid:
    description: The subnet OCID where to start the runners.
    required: true
  oci-av-domain:
    description: The region's availability domain where to start the runners.
    required: true
  oci-image-ocid:
    description: The image of the runner.
    required: true
  oci-image-shape:
    description: The image shape.
    required: false
    default: "VM.Standard.E4.Flex"
  runners-count:
    description: Number of runners to start
    required: false
    default: "1"
outputs:
  label:
    description: The label tag value of started runner.
    value: ${{ steps.start-runner.outputs.label }}
runs:
  using: "composite"
  steps:
    - id: start-runner
      run: |
        REGISTRATION_TOKEN_URL="https://api.github.com/repos/${GITHUB_REPOSITORY}/actions/runners/registration-token"
        export RUNNER_TOKEN=$(curl -X POST -H "Accept: application/vnd.github.v3+json" -H "Authorization: token ${{ inputs.github-token }}" ${REGISTRATION_TOKEN_URL}  | jq -r '.token')
        RUNNERS_COUNT=${{ inputs.runners-count }}
        for NUMBER in $(seq ${RUNNERS_COUNT});
        do
          USER_DATA_RAW=$(
            cat <<EOM
        #!/usr/bin/env bash
        cd /home/github-runner
        sudo -u github-runner mkdir actions-runner && cd actions-runner
        sudo -u github-runner curl -o actions-runner-linux-x64-2.304.0.tar.gz -L https://github.com/actions/runner/releases/download/v2.304.0/actions-runner-linux-x64-2.304.0.tar.gz
        sudo -u github-runner tar xzf ./actions-runner-linux-x64-2.304.0.tar.gz
        sudo -u github-runner ./config.sh --name "${GITHUB_WORKFLOW}${GITHUB_RUN_ID}${NUMBER}" --unattended --url https://github.com/${GITHUB_REPOSITORY} --token ${RUNNER_TOKEN} --replace --labels ${GITHUB_RUN_ID}
        ./svc.sh install github-runner
        ./svc.sh start
        EOM
        )
          USER_DATA=$(echo "$USER_DATA_RAW" | base64 -w 0)
          FREEFORM_TAGS="{\"repository\": \"${GITHUB_REPOSITORY}\", \"label\":\"${GITHUB_RUN_ID}\"}"
          INSTANCE_NAME=$( echo "${GITHUB_WORKFLOW}${GITHUB_RUN_ID}" | sed 's/[[:space:]]//g')${NUMBER}
          RESPONSE=$(oci compute instance launch \
            --compartment-id ${{ inputs.oci-compartment-ocid }} \
            --metadata "{\"user_data\": \"$USER_DATA\"}" \
            --display-name "${INSTANCE_NAME}" \
            --subnet-id ${{ inputs.oci-subnet-ocid }} \
            --wait-for-state RUNNING \
            --image-id ${{ inputs.oci-image-ocid }} \
            --availability-domain ${{ inputs.oci-av-domain }} \
            --shape ${{ inputs.oci-image-shape }} \
            --shape-config '{"ocpus":4, "memory_in_gbs":32}' \
            --freeform-tags "${FREEFORM_TAGS}"
          )
          INSTANCE_ID=$(echo $RESPONSE | jq -r '.data.id')
        done
        echo "label=${GITHUB_RUN_ID}" >> $GITHUB_OUTPUT
        sleep 60
      shell: bash