docker-compose.yml

# vi: set ts=2 sw=2:
# a structure support mongo replica + sharding
version: '3.4'
services:
  rs_1:
    image: mongo:3.2
    ports:
      - 27011:27017
    volumes:
      - ./rs_1.conf:/etc/mongo/mongod.conf:ro
    command: mongod --config /etc/mongo/mongod.conf
  rs_2:
    image: mongo:3.2
    ports:
      - 27021:27017
    volumes:
      - ./rs_2.conf:/etc/mongo/mongod.conf:ro
    command: mongod --config /etc/mongo/mongod.conf
  #rs_1_2:
  #  image: mongo:3.2
  #  ports:
  #    - 27002:27017
  #  volumes:
  #    - ./rs_1.conf:/etc/mongo/mongod.conf:ro
  #  command: mongod --config /etc/mongo/mongod.conf
  #rs_1_3:
  #  image: mongo:3.2
  #  ports:
  #    - 27003:27017
  #  volumes:
  #    - ./rs_1.conf:/etc/mongo/mongod.conf:ro
  #  command: mongod --config /etc/mongo/mongod.conf
    # --shardsvr

  mongo-config:
    image: mongo:3.2
    ports:
      - 27027:27017
    #command: mongod --configsvr --port 27017 --storageEngine wiredTiger --directoryperdb --logpath /dev/stdout
    volumes:
      - ./mongo-config.conf:/etc/mongo/mongod.conf:ro
    command: mongod --config /etc/mongo/mongod.conf

  mongos:
    image: mongo:3.2
    ports:
      - 27017:27017
    depends_on:
      - mongo-config
    volumes:
      - ./mongos.conf:/etc/mongo/mongod.conf:ro
    command: mongos --config /etc/mongo/mongod.conf

fake-data.js

for(var i=0; i<100000; i++){
  db.orders.insertOne({
    _id: "oid_" + i,
    oid: "oid_" + i,
    created_at: i
  })
}

mongo-config.conf

# vi: set ts=2 sw=2:
net:
  port: 27017
  bindIp: 0.0.0.0

systemLog:
  destination: file
  logAppend: true
  path: /dev/stdout

sharding:
  clusterRole: "configsvr"

mongos.conf

# vi: set ts=2 sw=2:
net:
  port: 27017
  bindIp: 0.0.0.0

systemLog:
  destination: file
  logAppend: true
  path: /dev/stdout

sharding:
  configDB: "mongo-config:27017"
  autoSplit: true

mongos_init.js

// use admin db
admin_db = db.getSiblingDB('admin');
admin_db.runCommand({addshard:'rs_1/rs_1:27017'});
admin_db.runCommand({addshard:'rs_2/rs_2:27017'});

rs_1.conf

# vi: set ts=2 sw=2:
net:
  port: 27017
  bindIp: 0.0.0.0

systemLog:
  destination: file
  logAppend: true
  path: /dev/stdout

storage:
  engine: "wiredTiger"
  directoryPerDB: true

replication:
  replSetName: rs_1

sharding:
  clusterRole: "shardsvr"

rs_1_init.js

var config = {
  _id: 'rs_1',
  members: [
    {_id: 0, host: 'rs_1:27017'},
    //{_id: 1, host: 'rs_1_2:27017'},
    //{_id: 2, host: 'rs_1_3:27017'}
  ]
};
rs.initiate(config);

rs_2.conf

# vi: set ts=2 sw=2:
net:
  port: 27017
  bindIp: 0.0.0.0

systemLog:
  destination: file
  logAppend: true
  path: /dev/stdout

storage:
  engine: "wiredTiger"
  directoryPerDB: true

replication:
  replSetName: rs_2

sharding:
  clusterRole: "shardsvr"

rs_2_init.js

var config = {
  _id: 'rs_2',
  members: [
    {_id: 0, host: 'rs_2:27017'},
    //{_id: 1, host: 'rs_2_2:27017'},
    //{_id: 2, host: 'rs_2_3:27017'}
  ]
};
rs.initiate(config);

test.js

db = db.getSiblingDB('test_db');
sh.enableSharding('test_db');
db.orders.createIndex({'oid': 1});
sh.shardCollection( "test_db.orders", {"oid": 1})

usage.js

use admin

db.createUser({ 
    user: "admin", 
    pwd: "admin", 
    roles: [
        { role: "userAdminAnyDatabase", db: "admin" }
    ] 
})



use test_db
db.createUser({ 
    user: "user", 
    pwd: "user", 
    roles: [
        { role: "dbOwner", db: "test_db" }
    ] 
})


# https://docs.mongodb.com/manual/reference/built-in-roles/#dbOwner