Development mongodb cluster tutorial

README.md

Development mongodb cluster tutorial

Tutorial on how to create a development mongodb cluster. Based on: https://docs.mongodb.com/manual/tutorial/deploy-replica-set-for-testing/

Start mongo1:

mongod --config d:\data\mongodb\mongod-cluster1.cfg

Start mongo2:

mongod --config d:\data\mongodb\mongod-cluster2.cfg

Initiate the cluster:

• connect to mongo1, inside the shell type:

rsconf = {
  _id: "rs-test",
  members: [
    {
     _id: 0,
     host: "localhost:28001"
    },
    {
     _id: 1,
     host: "localhost:28002"
    }
   ]
}
rs.initiate(rsconf)

Connection string:

mongodb://localhost:28001,localhost:28002?replicaset=rs-test

Prevent a member to become a primary

https://docs.mongodb.com/manual/tutorial/configure-secondary-only-replica-set-member/

cfg = rs.conf()
cfg.members[1].priority = 0
rs.reconfig(cfg)

Now you can stop the primary to simulate a failover and a secondary only access...

mongod-cluster1.cfg

systemLog:
    destination: file
    path: d:\data\mongodb\cluster1\log\mongod.log
storage:
    dbPath: d:\data\mongodb\cluster1\db
    mmapv1:
        smallFiles: true
replication:
    oplogSizeMB: 128
    replSetName: rs-test
    enableMajorityReadConcern: true
net:
    bindIp: 127.0.0.1
    port: 28001

mongod-cluster2.cfg

systemLog:
    destination: file
    path: d:\data\mongodb\cluster2\log\mongod.log
storage:
    dbPath: d:\data\mongodb\cluster2\db
    mmapv1:
        smallFiles: true
replication:
    oplogSizeMB: 128
    replSetName: rs-test
    enableMajorityReadConcern: true
net:
    bindIp: 127.0.0.1
    port: 28002