MongoDB Replicaset Compose

README.md

Deploy Containers

Prepare the data directory:

sudo mkdir -p -m 777 mongo/primary
sudo chown -R 1001 mongo 

docker-compose up -d

Add this lines to /etc/hosts:

127.0.0.1 mongodb-primary
127.0.0.1 mongodb-secondary-1
127.0.0.1 mongodb-secondary-2

Connection String for Database Access

mongodb://root:password123@localhost:27017,localhost:27018,localhost:27019/?replicaSet=rs0

Log into Primary container

docker exec -it mongodb-primary mongosh

Replicaset Status/Config Check

Log into primary container

$ use admin
$ db.auth("root", "password123")
$ rs.status()
$ rs.conf()

Update Replicaset Configuration

Log into primary container

$ use admin
$ db.auth("root", "password123")

Change priority value of Primary instance to 5

$ cfg = rs.conf()
$ cfg.members[0].priority = 5
$ rs.reconfig(cfg)

mongodb-rs.yml

version: "2"

services:
  mongodb-primary:
    # For linux
    image: "bitnami/mongodb:6.0"
    # For Mac M1
    # image: "ghcr.io/zcube/bitnami-compat/mongodb:6.0.4"
    container_name: mongodb-primary
    hostname: mongodb-primary
    networks:
      default:
    expose:
      - 27017
    ports:
      - 27017:27017
    environment:
      - MONGODB_ADVERTISED_HOSTNAME=mongodb-primary
      - MONGODB_REPLICA_SET_MODE=primary
      - MONGODB_ROOT_PASSWORD=password123
      - MONGODB_REPLICA_SET_NAME=rs0
      - MONGODB_REPLICA_SET_KEY=replicasetkey123
      - BITNAMI_DEBUG=true
    volumes:
      - "./mongo/primary:/bitnami"
  mongodb-secondary-1:
    # For linux
    image: "bitnami/mongodb:6.0"
    # For Mac M1
    # image: "ghcr.io/zcube/bitnami-compat/mongodb:6.0.4"
    container_name: mongodb-secondary-1
    hostname: mongodb-secondary-1
    depends_on:
      - mongodb-primary
    networks:
      default:
    expose:
      - 27018
    ports:
      - 27018:27017
    environment:
      - MONGODB_ADVERTISED_HOSTNAME=mongodb-secondary-1
      - MONGODB_REPLICA_SET_MODE=secondary
      - MONGODB_INITIAL_PRIMARY_HOST=mongodb-primary
      - MONGODB_INITIAL_PRIMARY_PORT_NUMBER=27017
      - MONGODB_INITIAL_PRIMARY_ROOT_PASSWORD=password123
      - MONGODB_REPLICA_SET_NAME=rs0
      - MONGODB_REPLICA_SET_KEY=replicasetkey123
  mongodb-secondary-2:
    # For linux
    image: "bitnami/mongodb:6.0"
    # For Mac M1
    # image: "ghcr.io/zcube/bitnami-compat/mongodb:6.0.4"
    container_name: mongodb-secondary-2
    hostname: mongodb-secondary-2
    depends_on:
      - mongodb-primary
    networks:
      default:
    expose:
      - 27019
    ports:
      - 27019:27017
    environment:
      - MONGODB_ADVERTISED_HOSTNAME=mongodb-secondary-2
      - MONGODB_REPLICA_SET_MODE=secondary
      - MONGODB_INITIAL_PRIMARY_HOST=mongodb-primary
      - MONGODB_INITIAL_PRIMARY_PORT_NUMBER=27017
      - MONGODB_INITIAL_PRIMARY_ROOT_PASSWORD=password123
      - MONGODB_REPLICA_SET_NAME=rs0
      - MONGODB_REPLICA_SET_KEY=replicasetkey123

  # mongodb-arbiter:
  #   # For linux
  #   image: "bitnami/mongodb:6.0"
  #   # For Mac M1
  #   # image: "ghcr.io/zcube/bitnami-compat/mongodb:6.0.4"
  #   container_name: mongodb-arbiter
  #   hostname: mongodb-arbiter
  #   depends_on:
  #     - mongodb-primary
  #   networks:
  #     default:
  #   expose:
  #     - 27020
  #   ports:
  #     - 27020:27017
  #   environment:
  #     - MONGODB_ADVERTISED_HOSTNAME=mongodb-arbiter
  #     - MONGODB_REPLICA_SET_MODE=arbiter
  #     - MONGODB_INITIAL_PRIMARY_HOST=mongodb-primary
  #     - MONGODB_INITIAL_PRIMARY_PORT_NUMBER=27017
  #     - MONGODB_INITIAL_PRIMARY_ROOT_PASSWORD=password123
  #     - MONGODB_REPLICA_SET_NAME=rs0
  #     - MONGODB_REPLICA_SET_KEY=replicasetkey123