Mongo-Docker - Single replica instance

docker-compose.yml

services:
  mongo:
    container_name: "mongo-container"
    entrypoint: >
      /bin/bash -c '
        mkdir /data/keys | true &&
        openssl rand -base64 756 > /data/keys/keyfile.key &&
        chmod 400 /data/keys/keyfile.key &&
        chown mongodb:mongodb /data/keys/keyfile.key &&
        /usr/local/bin/docker-entrypoint.sh mongod --replSet rs0 --keyFile /data/keys/keyfile.key --bind_ip_all'
    image: "mongo:8.0"
    ports:
      - 27017:27017
    environment:
      MONGO_INITDB_ROOT_USERNAME: ${MONGO_USERNAME}
      MONGO_INITDB_ROOT_PASSWORD: ${MONGO_PASSWORD}
      MONGO_INITDB_DATABASE: ${MONGO_DATABASE}
    volumes:
      - "mongo-data:/data"
    healthcheck:
      test: >
        mongosh
        -u $${MONGO_INITDB_ROOT_USERNAME}
        -p $${MONGO_INITDB_ROOT_PASSWORD}
        --eval "
          try {
            rs.status()
          } catch (err) {
            rs.initiate({ _id: 'rs0', members: [ { _id: 0, host: '127.0.0.1:27017' } ] })
          }
        " | mongosh --port 27017 --quiet
      interval: 5s
      timeout: 30s
      start_period: 0s
      start_interval: 1s
      retries: 30
    restart: unless-stopped

volumes:
  mongo-data:

env.example

MONGO_USERNAME=root
MONGO_PASSWORD=secret
MONGO_DATABASE=app_db

Makefile

# Load environment variables from .env
include .env
export $(shell sed 's/=.*//' .env)

# Variables
CONTAINER_NAME = mongo-container
# Build the Docker images (optional, as you're using a pre-built image)
build:
	docker compose up --build -d

# Start the Docker Compose services
up:
	docker compose up -d

# Check logs for the Mongo service
logs:
	docker compose logs --tail 50

# Connect to the mongo shell
connect:
	docker exec -it $(CONTAINER_NAME) mongosh -u $(MONGO_USERNAME) -p $(MONGO_PASSWORD)

# Stop the Docker Compose services
down:
	docker compose down

# Stop and remove the Docker Compose services, along with volumes
clean:
	docker compose down -v

# Restart the Docker Compose services
restart:
	docker compose restart

# Show the status of the services
ps:
	docker compose ps -a

# Help message to display available targets
help:
	@echo "Available targets:"
	@echo "  build       - Build the Docker images"
	@echo "  up          - Start the services defined in docker-compose.yml"
	@echo "  down        - Stop the services"
	@echo "  clean       - Stop and remove the services, along with volumes"
	@echo "  logs        - View logs for the Mongo service"
	@echo "  restart     - Restart the Docker services"
	@echo "  ps          - View the status of all services"