Amazon EC2 EBS CentOS 6.5 Storage Capacity not Added to Instance

Question

I have created a custom CentOS 6.5 image and registered it to AWS as EBS root device type. When I launch an instance, it works perfectly well, except that the storage capacity (instance storage to be included according to the instance type) is not added to the instance.

I made a try booting an instance using the official CentOS 6.5 AMI that is located in the AWS Marketplace, but I got the same result.

Does anyone know the reason, if it is a known issue, or whatever?

Thanks in advance.

Answer 1

First you have to make sure that the instance store is attached at launch time. From the AWS console it should look something like this:

Once you boot the instance you have to create a filesystem in the drive by running:

mkfs.ext4 /dev/sdb

Then you need to mount that drive somewhere in your root filesystem:

mkdir -p /mnt/myinstancestore
mount /dev/sdb /mnt/myinstancestore

You can run these commands to check that your drive is mounted:

df -h
mount

You can also add the mount entry to your /etc/fstab file so that it mounts permanently after every reboot:

/dev/sdb /mnt/myinstancestore ext4 defaults 1 2