Vagrant MongoDB Sharding Definitions

Purpose

This is forked from MUGBerlin/vagrant-machines. Vagrant is a nice way to experiment with technologies without polluting your own machine with software.

Preconditions

Please follow the install instructions at http://vagrantup.com/.

What it Does

This sets up 4 servers with MongoDB connected via a host-only network.

Clone this repo

$> git clone https://github.com/mrico/vagrant-mongo-shards.git

Startup:

vagrant up

The startup can take a while.

The IP addresses of the 3 shard servers are

• shard01.local
• shard02.local
• shard03.local

The IP adress of the configserver

• configsrv.local

Each server has the same setup. If you want to connect to a certain server via ssh use (e.g. shard01):

vagrant ssh shard01

Run a mongos instance on your host

mongos --configdb configsrv.local

Connect to the MongoDB instances from your host:

mongo

Add the shards

sh.addShard( "shard01.local:27017" )
sh.addShard( "shard02.local:27017" )
sh.addShard( "shard03.local:27017" )

Ready

Congrats! Your mongo cluster is up and running!

Don't forget to enable sharding for you database. e.g.

mongos>sh.enableSharding("myDb");

Set chunk size to something demo usable (optional)

use config
db.settings.save( { _id:"chunksize", value: 1 } )

Problems

• IP already used within your network

  • open the vagrant file and change the ip of all nodes: xxx.vm.network :hostonly, "10.0.0.24"

• VT-X is not available / machines are not staring

  • VT-X is required for 64-bit machines. You can switch to a 32-bit base image. Open Vagrantfile and replace all occurence of precise64 with precise32

Links

Useful link to the MongoDB documentation: http://docs.mongodb.org/manual/administration/sharding/