This assignment is to have hands-on exercises for MongoDB Replica Set and Sharding. You will first deploy and manipulate a replica set in a single server, and then in a cluster of three servers. You will also deploy a sharded cluster of three shards in a single server.

With the use of Docker and the given automation scripts, the need of troubleshooting is expected to be minimal. If there is any, troubleshooting required to finish the given tasks should be considered as part of this assignment.

In a required screenshot, make sure to include the title of the window frame that shows the hostname of your system. This is required to ensure the identity of your screenshot. Required screenshots are interleaved in the assignment description.

Task 1

1. To deploy a replica set of three members in a single server, following this document.

Screen1: Get the screenshots of rs.status() and rs.config() after finishing all the steps described in this document.

2. Populate data in the primary member using the following script.

use test

var bulk = db.test_collection.initializeUnorderedBulkOp() ;

people = ["Marc", "Bill", "George", "Eliot", "Matt", "Trey", "Tracy", "Greg", "Steve", "Kristina", "Katie", "Jeff"] ; for(var i=0 ; i<1000000 ; i++) {

user_id = i ;

name = people[Math.floor(Math.random()*people.length)] ;

number = Math.floor(Math.random()*10001) ;

bulk.insert( { "user_id" :user_id, "name" :name, "number" :number }) ;

}

bulk.execute() ;

Screen2: Read test_collection from PRIMARY. Limit the output to 10.

Screen3: Read test_collection from one of the secondaries. Limit the output to 10.

Task 2

1. To deploy a replica set of three members in a cluster of three servers using given automation scripts.. The scripts automate the replica deployment steps described in this document. Note:

  You should run bootstrap-ubuntu.sh in a terminal of your local laptop, not inside a docker

container.

  Window users: When bootstrap-ubuntu.sh gets to the following part of the script:

docker exec -t mongodb0.example.net /tmp/setup-replication.sh

docker exec -t mongodb0.example.net /tmp/populate-testdata.sh

You may get an error "OCI runtime exec failed: exec failed: container_linux.go:345: starting            container process caused "no such file or directory": unknown". That is because ^M is attached to every line of the scripts in your window in a way that #/bin/bash is not recognized because of      #/bin/bash^M. In mongodb0.example.net, do the following to remove ^M.

 root@mongodb0:/tmp# tr '\015' '\012' < setup-replication.sh > new

root@mongodb0:/tmp# mv new setup-replication.sh

root@mongodb0:/tmp# chmod 755 setup-replication.sh

Do the same for populate-testdata.sh

Manually run setup-replication.sh and populate-testdata.sh in mongodb0.example.net.