Google Cloud Firestore Emulator

A Google Cloud Firestore Emulator container image. The image is meant to be used for creating an standalone emulator for testing.

Environment

The following environment variables must be set:

• FIRESTORE_PROJECT_ID: The ID of the Google Cloud project for the emulator.

Connect application with the emulator

The following environment variables need to be set so your application connects to the emulator instead of the production Cloud Firestore environment:

• FIRESTORE_EMULATOR_HOST: The listen address used by the emulator (ie. firestore-emulator:8080)
• FIRESTORE_PROJECT_ID: The ID of the Google Cloud project used by the emulator.

Custom commands

This image contains a script named start-firestore (included in the PATH). This script is used to initialize the Datastore emulator.

Starting an emulator

By default, the following command is called:

start-firestore

Starting an emulator with options

This image comes with options. Check Firestore Emulator GCloud Wide Flags. --legacy, --data-dir and --host-port are not supported by this image.

Creating a Firestore emulator with Docker Compose

The easiest way to create an emulator with this image is by using Docker Compose. The following snippet can be used as a docker-compose.yml for a firestore emulator:

version: "2"

services:
  firestore:
    image: perrystallings/cloud-firestore-emulator
    environment:
      - FIRESTORE_PROJECT_ID=project-test
  app:
    image: your-app-image
    environment:
      - FIRESTORE_EMULATOR_HOST=firestore
      - FIRESTORE_PROJECT_ID=project-test