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.

This section introduces replication in MongoDB as well as the components and architecture of replica sets. The section also provides tutorials for common tasks related to replica sets.

##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. Of the data bearing nodes, one and only one member is deemed the primary node, while the other nodes are deemed secondary nodes.

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

• 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