#MongoDB Sharded Cluster

Create Docker Images

sudo docker build -t dev24/mongodb mongod
sudo docker build -t dev24/mongodb mongos

Create a Replica Set

sudo docker run -name rs1_srv1 -P -d dev24/mongodb --noprealloc --smallfiles --replSet rs1
sudo docker run -name rs1_srv2 -P -d dev24/mongodb --noprealloc --smallfiles --replSet rs1
sudo docker run -name rs1_srv3 -P -d dev24/mongodb --noprealloc --smallfiles --replSet rs1

Create a second replica set as the basis for the sharded cluster created below.

sudo docker run -name rs2_srv1 -P -d dev24/mongodb --noprealloc --smallfiles --replSet rs2
sudo docker run -name rs2_srv2 -P -d dev24/mongodb --noprealloc --smallfiles --replSet rs2
sudo docker run -name rs2_srv3 -P -d dev24/mongodb --noprealloc --smallfiles --replSet rs2

Create some Config Servers

sudo docker run -name cfg1 -P -d dev24/mongodb --noprealloc --smallfiles --configsvr --dbpath /data/db --port 27017
sudo docker run -name cfg2 -P -d dev24/mongodb --noprealloc --smallfiles --configsvr --dbpath /data/db --port 27017
sudo docker run -name cfg3 -P -d dev24/mongodb --noprealloc --smallfiles --configsvr --dbpath /data/db --port 27017

Create a Mongo Router

sudo docker run -name mongos1 -P -d dev24/mongos --configdb <IP_of_container_cfg1>:27017,<IP_of_container_cfg2>:27017,<IP_of_container_cfg3>:27017 --port 27017

Initialize Replica Sets

Get IPs and port bindings of all Docker containers

sudo docker inspect rs1_srv1
sudo docker inspect rs1_srv2
...

Initialize Replica Set 1

Connect to rs1_srv1 (you need the local port bound for 27017/tcp)

mongo --port <port>

rs.initiate()
rs.add("<IP_of_rs1_srv2>:27017")
rs.add("<IP_of_rs1_srv3>:27017")
rs.status()

Fix hostname of primary.

cfg = rs.conf()
cfg.members[0].host = "<IP_of_rs1_srv1>:27017"
rs.reconfig(cfg)
rs.status()

Initialize Replica Set 2

Connect to rs2_srv1 (you need the local port bound for 27017/tcp)

mongo --port <port>

rs.initiate()
rs.add("<IP_of_rs2_srv2>:27017")
rs.add("<IP_of_rs2_srv3>:27017")
rs.status()

Fix hostname of primary.

cfg = rs.conf()
cfg.members[0].host = "<IP_of_rs2_srv1>:27017"
rs.reconfig(cfg)
rs.status()

Initialize Shard

Connect to mongos1 (you need the local port bound for 27017/tcp)

mongo --port <port>

sh.addShard("rs1/<IP_of_rs1_srv1>:27017")
sh.addShard("rs2/<IP_of_rs2_srv1>:27017")
sh.status()