Sometimes you need a replica set in your local environment (perhaps you want to use the oplog). But it's somewhat involved to spin up a series of mongo containers and provide the correct configuration. This docker image will create a self-contained 3 node replica set (that is, all three nodes are running in one container).
THIS IS ONLY USEFUL FOR LOCAL DEVELOPMENT
You need to know the following:
User info is configured on the admin database:
- username:
dev - password:
dev
Each instance exposes a port, all listening on 0.0.0.0 interface:
- db1:
27001[primary] - db2:
27002 - db3:
27003
The container will create one volume at /data, but you can mount one or more to your host at these paths:
- db1:
/data/db1[primary] - db2:
/data/db2 - db3:
/data/db3
You can customize the replica set name by providing REPLICA_SET_NAME environment variable. default name is: rs0
If you mount something into /data/db1, the container will not go through it's initialization process, but it will also assume that you have mounted all 3 volumes -- so mount all 3 or none. You can customize the username/password by providing USERNAME/PASSWORD environment variables (but you probably don't need to).
docker run -d --name mongo -v /data/mongodb:/data -e "REPLICA_SET_NAME=mongo-rs" -e "USERNAME=dev" -e "PASSWORD=dev" --restart=always luamas/mongo-local-replicaset
mongodb://dev:dev@mongo:27001,mongo:27002,mongo:27003/db?authSource=admin