Can I deploy the Wix External DB Adapter without using a cloud provider DB?

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I’m trying to run the Wix External Database Adapter on my own VPS without using any cloud provider (no GCP, AWS, or Azure). I’ve set up both the adapter and a MySQL 8.0 database as Docker containers on the same host using this docker-compose.yml:

version: "3.7"

services:
  adapter:
    image: gcr.io/wix-velo-api/velo-external-db:mysql
    ports:
      - "5000:5000"
    environment:
      PORT: "5000"
      TYPE: "mysql"
      CLOUD_VENDOR: "gcp" # for example
      HOST: "mysql"
      USER: "myuser"
      PASSWORD: "test"
      DB: "test"
      SECRET_KEY: "test"

  mysql:
    image: mysql:8
    ports:
      - "3306:3306"
    environment:
      MYSQL_ROOT_PASSWORD: "rootpass"
      MYSQL_DATABASE: "test"
      MYSQL_USER: "myuser"
      MYSQL_PASSWORD: "test"
    volumes:
      - mysql_data:/var/lib/mysql

volumes:
  mysql_data:

My question is:

Is there a way to deploy the adapter without requiring any cloud vendor-specific configuration like CLOUD_SQL_CONNECTION_NAME?

I’m not using any managed cloud database — just a local MySQL container. When I set CLOUD_VENDOR: gcp, the container expects GCP-specific values that don’t apply in this case.

If possible:

  • What should I set for CLOUD_VENDOR when self-hosting?
  • Can I omit this variable or use a neutral/default value (e.g., "none" or "local")?

Any advice or documentation for this type of setup would be greatly appreciated.