Setup MongoDB on Docker

Setup MongoDB community server as a single node.

$ docker pull mongodb/mongodb-community-server

Verify MongoDB image is downloaded successfully: 

$ docker images

Run docker image

$ docker run --name mongo -p 27017:27017 -d mongodb/mongodb-community-server:latest

Setup MongoDB 3 node cluster on docker

The steps to create a docker cluster are as follows.

1. Create a Docker network.

            $ docker network create mongoCluster

1. Start three instances of MongoDB.

docker run -d --rm -p 27017:27017 --name mongo1 --network mongoCluster mongo mongod --replSet myReplicaSet --bind_ip localhost,mongo1

docker run -d --rm -p 27018:27017 --name mongo2 --network mongoCluster mongo mongod --replSet myReplicaSet --bind_ip localhost,mongo2

 

docker run -d --rm -p 27019:27017 --name mongo3 --network mongoCluster mongo mongod --replSet myReplicaSet --bind_ip localhost,mongo3

1. Initiate the Replica Set.

docker exec -it mongo1 mongosh --eval "rs.initiate({

 _id: \"myReplicaSet\",

 members: [

   {_id: 0, host: \"mongo1\"},

   {_id: 1, host: \"mongo2\"},

   {_id: 2, host: \"mongo3\"}

 ]

})"

docker exec -it mongo1 mongosh --eval "rs.status()"

Detailed information on Replica set configuration can be found here.

Once you have a MongoDB cluster up and running, you will be able to experiment with it.

Ref: https://www.mongodb.com/compatibility/deploying-a-mongodb-cluster-with-docker

Using Docker Compose -

docker-compose -f config/docker-compose.yaml up -d


More details on cluster setup can be learned from Mongodb University here.