docker-swarm-deploy.yml

name: Deploy Docker Stack

on:
  workflow_call:
    inputs:
      docker_context_name:
        description: 'Docker Context Name'
        required: true
        type: string
      docker_stack_name:
        description: 'Docker Stack Name'
        required: true
        type: string
      docker_compose_path:
        description: 'Path to Docker Compose file'
        required: true
        type: string
      docker_image_tag:
        description: 'Docker image tag'
        required: true
        type: string
      environment_variables:
        description: 'Optional list of environment variables'
        required: false
        type: string

jobs:
  deploy:
    runs-on: self-hosted

    steps:
      - name: Checkout repository
        uses: actions/checkout@v3

      - name: Deploy Docker Stack
        run: |
          # Docker context
          CONTEXT_NAME="${{ inputs.docker_context_name }}"
          
          # Docker compose file name
          COMPOSE_FILE_NAME="${{ inputs.docker_compose_path }}"
          
          # Image tag
          IMAGE_TAG=${{ inputs.docker_image_tag }}
          
          # Stack name from the $COMPOSE_FILE_NAME
          COMPOSE_STACK_NAME="${{ inputs.docker_stack_name }}"

          # Variables that will be substituted in the $COMPOSE_FILE_NAME
          export DOCKER_TAG=$IMAGE_TAG

          # Process optional environment variables
          if [[ -n "${{ inputs.environment_variables }}" ]]; then
            echo "${{ inputs.environment_variables }}" | while IFS= read -r env_var; do
              export "$env_var"
            done
          fi

          # Use context
          docker context use $CONTEXT_NAME

          # Deploy stack with a single docker-compose.yml file
          docker stack config --compose-file $COMPOSE_FILE_NAME | docker stack deploy --prune --compose-file - $COMPOSE_STACK_NAME