This tutorial will guide you through create Amazon EBS
(Elastic Block Store) volume, attach it to your running instance and save your
data to Amazon EBS. Before that lets understand what is Amazon EBS volumes and
what are the features it provides
Amazon
Elastic Block Store (EBS) provides block level storage volumes for use with
Amazon EC2 instances. We can imagine it as attaching an external hard drive to
your system to store data. We can attach multiple EBS volumes to an instance,
but one volume can be attached to single instance at a time. Data will be
remain saved in the volume after your instance is terminated.
Some Features of Amazon EBS Volumes
·
Amazon
EBS allows you to create storage volumes from 1 GB to 1 TB
·
Amazon
EBS volumes placed in a specific availability zone can then be attached to
instances in that same availability zone.
·
Each
storage volume is automatically replicated within the same Availability Zone.
This prevents data loss due to failure of any single hardware component.
·
Amazon
EBS also provides the ability to create point-in-time snapshots of volumes,
which persists to Amazon S3. These snapshots can be used as the starting point
for new Amazon EBS volumes. Snapshot can be used to instantiate new volume
·
AWS
also enables you to create new volumes from AWS hosted public data sets.
·
Amazon
CloudWatch exposes performance metrics for EBS volumes, giving you insight into
bandwidth, throughput, latency, and queue depth.
Let’s proceed to actual work, there are two ways
of create / attach volumes:
1. By
running commands from command prompt
2. By
using AWS Console
In this tutorial we will use approach #1
Define following environment variable:
export EC2_PRIVATE_KEY=YOUR-PATH-TO-PRIVATE-KEY
export EC2_CERT= YOUR-PATH-TO-X.509-CERTIFICATE
If you want to know how to get your private key
and certificate please click here
1. Create
EBS volume:
$ ec2-create-volume --size 100 --availability-zone
us-east-1a
·
Size in GB
·
It will return id of created volume
2. Attach
the volume to running instance:
$ ec2-attach-volume vol-6715f30c -i i-da3162b5 -d
/dev/sdh
·
vol-6715f30c: Volume id
·
i-da1662b5: Instance id
3. Format
the Volume, if first time attached to any instance (first time
activity, if you do it again you will loose all your data):
$ yes | mkfs -t ext3 /dev/sdh
4. Mount
Volume:
4.1
Create directory in which we will mount volume
$ mkdir /disk2
4.2
Mounts the volume to specified directory
$ mount /dev/sdh /disk2
Now volume
is attaché to your instance, you can copy your data to / from volume
5. Unmount
Volume:
$ umount -l /disk2/
6. Detach
the Volume:
$ ec2-detach-volume vol-6715f30c -i i-da3162b5
·
vol-6715f30c: Volume id
·
i-da3162b5: Instance id
7. Delete
Volume:
$ ec2-delete-volume vol-6715f30c
References: http://aws.amazon.com/
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