# 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. 

<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">

##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

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
  
  
<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">

  
- Mongo Database: app_swarmlab
- Mongo Database Usename: app_swarmlab
- Mongo Database Password: app_swarmlab
  

- Mongo ReplicaSet: rs0


### 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
>