mongomirrorCommand

mongomirrorCommand.md

• Install MongoDB Enterprise Advanced 4.0 using the following commands:

  Purpose	Command
  Add MongoDB Public Key	wget -qO - https://www.mongodb.org/static/pgp/server-4.0.asc | sudo apt-key add -
  Add MongoDB EA Repo	echo "deb [ arch=amd64 ] http://repo.mongodb.com/apt/ubuntu bionic/mongodb-enterprise/4.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-enterprise.list
  Update Apt Package Cache	sudo apt-get update
  Install MongoDB EA 4.0.15	sudo apt-get install -y mongodb-enterprise=4.0.15 mongodb-enterprise-server=4.0.15 mongodb-enterprise-shell=4.0.15 mongodb-enterprise-mongos=4.0.15 mongodb-enterprise-tools=4.0.15

• Edit the MongoDB Enterprise config file by running sudo vi /etc/mongod.etc update the binding, add it to a replica set, and enable username and password auth as shown below or in the sample config.

    # allow connections to any local IP address
    net:
        port: 27017
        bindIp: 0.0.0.0
    # make this node part of a replica set
    replication:
        replSetName: rsMigration
    # enable basic SCRAM username/password auth
    security:
        authorization: enabled

• Run the following commands to start MongoDB:

  Purpose	Command
  Start mongod	sudo service mongod start
  Initiate the rep set	mongo --eval "rs.initiate()"
  Add root user for administration	mongo --eval "db = db.getSisterDB('admin');db.createUser({user:'root',pwd:'root123',roles:['root']});"
  Add app user	mongo -u root -p root123 --eval "db = db.getSisterDB('admin');db.createUser({user:'appUser',pwd:'appUser123',roles:['clusterMonitor','readWriteAnyDatabase']});"
  Get rep set config	mongo -u root -p root123 --eval "rs.config()"

  • Run the following commands to setup the load generator (POCDriver)

  Purpose	Command
  Update Apt package cache	sudo apt-get update
  Install Java	sudo apt install -y default-jre
  Download POC Driver	wget https://github.com/johnlpage/POCDriver/raw/master/bin/POCDriver.jar

  • Begin to generate data on your cluster by running the following command: java -jar POCDriver.jar -c "mongodb://appUser:appUser123@XXXX" -t 1 -e -d 60 -f 25 -a 5:5 --depth 2 -x 3 and replace the XXXX with the address of the cluster

  • Within the CloudShell session of your mongodb compute instance, run the following commands to prepare mongomirror

Purpose	Command
Download mongomirror	wget https://s3.amazonaws.com/mciuploads/mongomirror/binaries/linux/mongomirror-linux-x86_64-ubuntu1804-0.9.1.tgz
Extract the tar	tar xvzf mongomirror*
Enter extracted directory	cd mongomirror*/bin

• Once complete, we will run the mirror command as follows:

./mongomirror 
    --host rsMigration/localhost:27017 \
    --username root --password root123 \ 
    --destination MIGRATE-shard-0/migrate-shard-00-00-oadjb.gcp.mongodb.net:27017,migrate-shard-00-01-oadjb.gcp.mongodb.net:27017,migrate-shard-00-02-oadjb.gcp.mongodb.net:27017 \
    --destinationUsername admin --destinationPassword admin123 
    --drop