Mongo Replica Set docker compose

docker-compose-mongo-replicaset.yml

STANDALONE -> REPLICA SET TUTORIAL

1. GENERATE KEY:

openssl rand -base64 756 > <path-to-keyfile>
chmod 400 file.key


2. MODIFY DOCKER COMPOSE

version: "3"

services:
  localmongo1:
    hostname: mongo1
    container_name: localmongo1
    image: mongo:4.2
    ports:
      - "27011:27017"
    volumes:
      - test:/data/db
      - ./file.key:/data/file.key
    command: --quiet --storageEngine wiredTiger --auth
    entrypoint: [ "/usr/bin/mongod","--keyFile", "/data/file.key", "--bind_ip_all", "--replSet", "rs0" ]
    restart: always
  localmongo2:
    hostname: mongo2
    container_name: localmongo2
    image: mongo:4.2
    ports:
      - "27012:27017"
    volumes:
      - test2:/data/db
      - ./file.key:/data/file.key
    command: --quiet --storageEngine wiredTiger --auth
    entrypoint: [ "/usr/bin/mongod","--keyFile", "/data/file.key", "--bind_ip_all", "--replSet", "rs0" ]
    restart: always
  localmongo3:
    hostname: mongo3
    container_name: localmongo3
    image: mongo:4.2
    ports:
      - "27013:27017"
    volumes:
      - test3:/data/db
      - ./file.key:/data/file.key
    command: --quiet --storageEngine wiredTiger --auth
    entrypoint: [ "/usr/bin/mongod","--keyFile", "/data/file.key", "--bind_ip_all", "--replSet", "rs0" ]
    restart: always

volumes: 
   test:
   test2:
   test3:


3. go to 

docker exec -it localmongo1 /bin/bash

mongo -u superAdmin -p superAdmin

rs.initiate({
  _id : 'rs0',
  members: [
    { _id : 0, host : "PUBLICIP:27011" },
    { _id : 1, host : "PUBLICIP:27012" },
    { _id : 2, host : "PUBLICIP:27013" }
  ]
})

get IP from ifconfig