Traefik

This guide walks you through setting up and running Elsa Server and Studio using a Docker Compose file. The setup includes PostgreSQL as the database, Traefik as a reverse proxy, and Elsa workflows.

Docker Compose Configuration

The following docker-compose.yml file defines services for:

• PostgreSQL database for data persistence.

• Elsa Server and Studio, configured to use PostgreSQL.

• Traefik reverse proxy for routing requests to the appropriate service.

services:

    # PostgreSQL database.
    postgres:
        image: postgres:latest
        command: -c 'max_connections=2000'
        environment:
            POSTGRES_USER: elsa
            POSTGRES_PASSWORD: elsa
            POSTGRES_DB: elsa
        volumes:
            - postgres-data:/var/lib/postgresql/data
        ports:
            - "5432:5432"
        networks:
            - elsa-network

    # Elsa Server and Studio behind Traefik and configured with PostgreSQL.
    elsa-server-and-studio:
        image: elsaworkflows/elsa-server-and-studio-v3-4-0-preview:latest
        pull_policy: always
        environment:
            ASPNETCORE_ENVIRONMENT: Development
            HTTP_PORTS: 8080
            HOSTING__BASEURL: http://elsa.localhost:1280
            DATABASEPROVIDER: PostgreSql
            CONNECTIONSTRINGS__POSTGRESQL: Host=postgres;Port=5432;Database=elsa;Username=elsa;Password=elsa
        labels:
            - "traefik.enable=true"
            - "traefik.http.routers.elsa.rule=Host(`elsa.localhost`)"
            - "traefik.http.services.elsa.loadbalancer.server.port=8080"
        networks:
            - elsa-network

    # Traefik reverse proxy.
    traefik:
        image: traefik:2.7.2
        command:
            - "--api.insecure=true" # Enables the Traefik dashboard
            - "--providers.docker=true" # Enables Docker as the configuration source
            - "--entrypoints.web.address=:80" # Sets up the HTTP entry point on port 80
        ports:
            - "1280:80" # Expose HTTP port. Access Elsa Studio at: http://elsa.localhost:1280/
            - "8080:8080" # Expose Traefik dashboard
        volumes:
            - "/var/run/docker.sock:/var/run/docker.sock" # Allows Traefik to communicate with the Docker daemon
        networks:
            - elsa-network
        depends_on:
            - elsa-server-and-studio

networks:
    elsa-network:
        driver: bridge

volumes:
    postgres-data:

Setup Instructions

Follow these steps to set up and run the Docker Compose configuration:

• Ensure you have Docker and Docker Compose installed on your machine. Refer to the prerequisites if necessary.

• Create a file named docker-compose.yml and paste the provided configuration into it.

• Run the following command in the directory containing the docker-compose.yml file to start the services:

  docker-compose up

• Edit your /etc/hosts file (on Linux/Mac) or C:\Windows\System32\drivers\etc\hosts (on Windows) to include the following entry for mapping elsa.localhost to 127.0.0.1:

  127.0.0.1 elsa.localhost

• Once the services are running:

  • Access Elsa Studio at http://elsa.localhost:1280.

  • Open the Traefik dashboard at http://localhost:8080.

Environment Configuration

The environment variables and settings used in this Docker Compose file:

• PostgreSQL: The database user, password, and name are configured as elsa.

• Elsa Server and Studio: Configured to use PostgreSQL as the database provider.

• Traefik: Acts as a reverse proxy with routing rules for elsa.localhost.

Troubleshooting

If you encounter issues, check the following:

• Ensure Docker and Docker Compose are correctly installed and running.

• Verify the /etc/hosts file includes an entry for elsa.localhost mapping to 127.0.0.1.

• Inspect logs for each service using docker-compose logs [service-name].