Extend EBS Volume
1. wget ftp://ftp.icm.edu.pl/vol/rzm5/linux-fedora/linux/epel/6/x86_64/cloud-utils-growpart-0.27-10.el6.x86_64.rpm
2. rpm -ivh cloud-utils-growpart-0.27-10.el6.x86_64.rpm
3. growpart /dev/xvda 1
4 reboot
5. resize2fs /dev/xvda1