Thực hành tạo replica set trên mongo db sử dụng công cụ docker, docker compose

mongodb.replica-set.v2.yml

version: "3"
services:
  mongoarbiter:
    hostname: mongoarbiter
    container_name: localmongoarbiter
    image: mongo:4
    expose:
        - 27017
    ports:
        - 17016:27017
    restart: always
    entrypoint: [ "/usr/bin/mongod", "--bind_ip_all", "--replSet", "rs0" ]
  mongo1:
    hostname: mongo1
    container_name: localmongo1
    image: mongo:4
    expose:
        - 27017
    ports:
        - 17017:27017
    restart: always
    entrypoint: [ "/usr/bin/mongod", "--bind_ip_all", "--replSet", "rs0" ]
  mongo2:
    hostname: mongo2
    container_name: localmongo2
    image: mongo:4
    expose:
        - 27017
    ports:
        - 17018:27017
    restart: always
    entrypoint: [ "/usr/bin/mongod", "--bind_ip_all", "--replSet", "rs0" ]
  mongo3:
    hostname: mongo3
    container_name: localmongo3
    image: mongo:4
    expose:
        - 27017
    ports:
        - 17019:27017
    restart: always
    entrypoint: [ "/usr/bin/mongod", "--bind_ip_all", "--replSet", "rs0" ]

mongodb.replica-set.yml

version: '3.5'
networks:
    default:
services:
    mongo:
        restart: unless-stopped
        image: mongo:4
        expose:
            - 27016
            - 27017
            - 27018
            - 27019
        ports:
            - "17016:27016"
            - "17017:27017"
            - "17018:27018"
            - "17019:27019"
        volumes:
            - /home/data/mongo/:/data/db
        entrypoint: >
            /bin/bash -c "mkdir -p /var/log/mongo /data/db /data/db1 /data/db2 /data/arbiter &&
                            mongod --dbpath /data/arbiter --port 27016 --bind_ip_all --fork --logpath /var/log/mongo/mongod-arbiter.log --replSet "rs0" &&                
                            mongod --dbpath /data/db --port 27017 --bind_ip_all --fork --logpath /var/log/mongo/mongod-27017.log --replSet "rs0" &&
                            mongod --dbpath /data/db1 --port 27018 --bind_ip_all --fork --logpath /var/log/mongo/mongod-27018.log --replSet "rs0" &&
                            mongod --dbpath /data/db2 --port 27019 --bind_ip_all --fork --logpath /var/log/mongo/mongod-27019.log --replSet "rs0" &&
                            sleep 15s &&
                            echo 'rs.initiate({
                                \"_id\": \"rs0\",
                                \"members\": [
                                  {
                                    \"_id\": 0,
                                    \"host\": \"127.0.0.1:27017\"
                                  },
                                  {
                                    \"_id\": 1,
                                    \"host\": \"127.0.0.1:27018\"
                                  },
                                  {
                                    \"_id\": 2,
                                    \"host\": \"127.0.0.1:27019\"
                                  }
                                ] 
                              })' | mongo &&
                            echo 'Thêm arbiter' &&
                            echo 'rs.addArb(\"127.0.0.1:27016\")' | mongo &&
                            echo 'Xem lại trạng thái' &&
                            echo 'rs.status()' | mongo &&
                            echo 'Xem lại config' &&
                            echo 'rs.conf()' | mongo &&
                            tail /var/log/mongo/* -f"

Cách 1

docker-compose -f mongodb.replica-set.yml up

Cách 2

Bước 1:

docker-compose -f mongodb.replica-set.v2.yml up

Bước 2:

docker exec -it localmongo1 bash

Bước 3:

mongo

Bước 4:

rs.initiate(
  {
    _id : 'rs0',
    members: [
      { _id : 0, host : "mongo1:27017" },
      { _id : 1, host : "mongo2:27017" },
      { _id : 2, host : "mongo3:27017" }
    ]
  }
)

Bước 5:

Thêm node trọng tài
rs.addArb("mongoarbiter:27017")