deploy_helm_chart.yaml

name: Deploy Helm Chart to FNS GKE

on:
  workflow_dispatch:
    inputs:
      version:
        description: "Version of the Helm chart to deploy (optional, defaults to latest snapshot)"
        required: false
      env:
        type: choice
        description: "Environment to deploy to"
        required: true
        default: "test"
        options:
          - "test"
          - "prod"

jobs:
  setup-deploy:
    runs-on: ubuntu-latest
    permissions:
      contents: 'read'
      id-token: 'write'

    steps:
      - name: Checkout Fairspace repository
        uses: actions/checkout@v4

      - name: Checkout FNS model and values files
        uses: actions/checkout@v4
        with:
          repository: 'thehyve/fnscloud-demonstrator'
          path: './fns'
          token: ${{ secrets.FNS_PAT }}

      - name: Set environment
        run: |
          if [ -n "${{ github.event.inputs.environment }}" ]; then
            ENVIRONMENT="${{ github.event.inputs.environment }}"
          else
            ENVIRONMENT="test"
          fi
          echo "ENVIRONMENT=$ENVIRONMENT" >> $GITHUB_ENV
          echo "Starting deployment to the $ENVIRONMENT environment"

      - name: Define Helm Chart version (taken from input or latest snapshot)
        run: |
          VERSION=$(cat ./VERSION)-SNAPSHOT
          if [ -n "${{ github.event.inputs.version }}" ]; then
            VERSION=${{ github.event.inputs.version }}
          fi
          echo "Helm charts version to be deployed: $VERSION"
          echo "VERSION=$VERSION" >> $GITHUB_ENV

      - name: Auth to Google Cloud
        uses: google-github-actions/auth@v2
        with:
          workload_identity_provider: ${{ vars.CICD_WORKLOAD_IDENTITY_PROVIDER }}
          service_account: ${{ vars.CICD_SERVICE_ACCOUNT_EMAIL }}

      - name: Get GKE credentials to access the cluster
        uses: google-github-actions/get-gke-credentials@v2
        with:
          cluster_name: fns-cloud-f01
          location: europe-west1

      - name: Setup Helm
        uses: azure/setup-helm@v4.1.0
        with:
          version: ${{ vars.HELM_VERSION }}

      - name: Login with Helm
        run: |
          echo ${{ secrets.GITHUB_TOKEN }} | helm registry login ${{ vars.HELM_REGISTRY }} --username ${{ github.repository_owner }} --password-stdin

      - name: Check if namespace exists (create if not)
        id: check_namespace
        run: |
          if kubectl get namespace fairspace-${{ env.ENVIRONMENT }} &> /dev/null; then
            echo "Namespace fairspace-${{ env.ENVIRONMENT }} exists."
          else
            echo "Namespace fairspace-${{ env.ENVIRONMENT }} does not exist. Creating namespace."
            kubectl create namespace fairspace-${{ env.ENVIRONMENT }}
          fi

      - name: Delete StatefulSet (if exists) to force re-deploy
        run: |
          if kubectl get statefulset fairspace --namespace fairspace-${{ env.ENVIRONMENT }} &> /dev/null; then
            kubectl delete statefulset fairspace --namespace fairspace-${{ env.ENVIRONMENT }} --cascade=orphan
            echo "StatefulSet fairspace deleted."
          else
            echo "StatefulSet fairspace does not exist."
          fi 

      - name: Deploy Helm chart
        run: |
          helm upgrade --install fairspace oci://${{ vars.HELM_REGISTRY }}/fairspace \
          --version ${{ env.VERSION }} \
          --namespace=fairspace-${{ env.ENVIRONMENT }} \
          --set-file saturn.vocabulary=./fns/fairspace/model/vocabulary.ttl \
          --set-file saturn.views=./fns/fairspace/model/views.yaml \
          --values ./fns/fairspace/deployment/${{ env.ENVIRONMENT }}/fairspace-test-values.yaml