Amazon Elastic Compute Cloud (Amazon EC2) is a web service that provides resizable compute capacity in the cloud. It is designed to make web-scale computing easier for developers. Amazon EC2 enables “compute” in the cloud.
Amazon Elastic Block Store (EBS) provides block level storage volumes for use with Amazon EC2 instances. EBS provides highly available, highly reliable storage volumes that can be attached to a running Amazon EC2 instance and exposed as a device within the instance. It persists independently from the life of an instance. These EBS volumes are created in a particular Availability Zone and can be from 1 GB to 1 TB in size.
Follow the below steps to Create, attach and mount EBS Volumes to launched EC2 instances:
Create the EBS Volume
Log into AWS Management Console and follow the below steps for all the each extra volume to be attached to instances. For example, let’s create and attach a 6GB EBS volume (for Oracle Alert Logs and Traces) to Database server.
• Choose “Volumes” on the left hand control panel:
• In the right-hand pane under EBS Volumes, click on ‘Create Volume’
• In Create Volume dialog box that appears:
Enter the size mentioned in table, keep availability zone same as that of Database instance and select No Snapshot and click on ‘Create’.
• This will create an EBS volume and once create is complete it will be displayed as
Attach Volume
• Select a volume and click on button to Attach Volume
• Select the instance for which EBS volume is to be attached. Also mention the mount point for the volume in device.
Here Instance is for database and mount device is /dev/sdf
• Once attached it will be displayed as
Mount the Volume
• Execute commands in the EC2 instance’s (Database Server) linux shell. As this is a new volume (with no data), we will have to format it
Run command:
mkfs -t ext3 /dev/sdf(Replace text in blue with mount device used in previous step)
• Make a directory to mount the device.
mkdir /mnt/disk1• Mount the device in newly created directory
mount /dev/sdf /mnt/disk1(Replace text in blue as required)
• By default volumes will not be attached to the instance on reboot. To attach these volumes to given mount point every time on reboot, execute the following command
echo "/dev/sdf /mnt/disk1ext3 noatime 0 0" >> /etc/fstab"(Replace text in blue as required)
Check attached volume by using command:
df -hUnmounting the volume
From the Elastic Block Storage Feature Guide: A volume must be unmounted inside the instance before being detached. Failure to do so will result in damage to the file system or the data it contains.
umount /mnt/disk1Remember to cd out of the volume, otherwise you will get an error message
“umount: /mnt/disk1: device is busy”
Hope the above steps help you get into action in minutes.
In case you get stuck at any point, do comment below. I will be glad to help. :)
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