Add EBS to Ubuntu EC2 Instance
Amazon Web-ServicesAmazon Ec2Amazon EbsAmazon Web-Services Problem Overview
I'm having problem connecting EBS volume to my Ubuntu EC2 Instance.
Here's what I did:
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From the Amazon AWS Console, I created a EBS 150GB volume and attached it to an Ubuntu 11.10 EC2 instance. Under the EBS volume properties, "Attachment" shows: "[my Ubuntu instance id]:/dev/sdf (attached)"
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Tried mounting the drive on the Ubuntu box, and it told me "mount: /dev/sdf is not a block device"
sudo mount /dev/sdf /vol
- So I checked with fdisk and tried to mount from the new location and it told me it wasn't the right file system.
sudo fdisk -l
sudo mount -v -t ext4 /dev/xvdf /vol
the error: > mount: wrong fs type, bad option, bad superblock on /dev/xvdf, missing > codepage or helper program, or other error In some cases useful info > is found in syslog - try dmesg | tail or so
"dmesg | tail" told me it gave the following error: >EXT4-fs (sda1): VFS: Can't find ext4 filesystem
I also tried putting the configurations into /etc/fstab file as instructed on http://www.webmastersessions.com/how-to-attach-ebs-volume-to-amazon-ec2-instance, but still gave same not the right file system error.
Questions:
Q1: Based on point 1 (above), why was the volume mapped to 'dev/sdf' when it's really mapped to '/dev/xvdf'?
Q2: What else do I need to do to get the EBS volume loaded? I thought it'll just take care of everything for me when I attach it to a instance.
Amazon Web-Services Solutions
Solution 1 - Amazon Web-Services
Since this is a new volume, you need to format the EBS volume (block device) with a file system between step 1 and step 2. So the entire process with your sample mount point is:
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Create EBS volume.
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Attach EBS volume to
/dev/sdf
(EC2's external name for this particular device number). -
Format file system
/dev/xvdf
(Ubuntu's internal name for this particular device number):sudo mkfs.ext4 /dev/xvdf
Only format the file system if this is a new volume with no data on it. Formatting will make it difficult or impossible to retrieve any data that was on this volume previously.
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Mount file system (with update to /etc/fstab so it stays mounted on reboot):
sudo mkdir -m 000 /vol echo "/dev/xvdf /vol auto noatime 0 0" | sudo tee -a /etc/fstab sudo mount /vol
Solution 2 - Amazon Web-Services
Step 1: create volume
step 2: attach to your instance root volume
step 3: run sudo resize 2fs -p /dev/xvde
step 4: restart apache2 sudo service apache2 restart
step 4: run df -h
You can see total volume attached to your instance.