# storage-mongo-replica
A replica set in MongoDB is a group of mongod processes that maintain the same data set. Replica sets provide redundancy and high availability, and are the basis for all production deployments.
##Replication in MongoDB
A replica set is a group of mongod instances that maintain the same data set. A replica set contains several data bearing nodes and optionally one arbiter node.
More here:
https://docs.mongodb.com/manual/replication/
## Quickstart
< img align = "right" width = "300" height = "300" src = "https://git.swarmlab.io:3000/swarmlab/storage-mongo-replica/raw/branch/master/images/replica-set-read-write-operations-primary.bakedsvg.png" >
This is a quickstart guide of howto use this *LabInstance storage-mongo-replica*
### HowTo use it
### Default Configuration
- Mongo Port: 27017
- Mongo Root Username: swarmlab
- Mongo Root Password: swarmlab
- Mongo Database: app_swarmlab
- Mongo Database Usename: app_swarmlab
- Mongo Database Password: app_swarmlab
- Mongo ReplicaSet: rs0
< img align = "right" width = "500" height = "300" src = "https://git.swarmlab.io:3000/swarmlab/storage-mongo-replica/raw/branch/master/images/replica-set-primary-with-two-secondaries.bakedsvg.png" >
### Test it!
>
> MONGO_INITDB_ROOT_USERNAME=swarmlab
> MONGO_INITDB_ROOT_PASSWORD=swarmlab
> MONGO_INITDB_DATABASE=app_swarmlab
> MONGO_INITDB_USERNAME=app_swarmlab
> MONGO_INITDB_PASSWORD=app_swarmlab
> MONGO_REPLICA_SET_NAME=rs0
>
> mongo "mongodb://localhost:30001,localhost:30002,localhost:30003/$MONGO_INITDB_DATABASE" -u $MONGO_INITDB_USERNAME
> mongo "mongodb://localhost:30001,localhost:30002,localhost:30003/app_swarmlab" -u app_swarmlab
>
