AWS Tools and Scripts

Dynamic DNS

• Script to update a Route53 (DNS) record when a server IP address changes
  • Option 1: See route53update.sh adding "@reboot /path/to/script/route53update.sh" to your cron list.
  • Option 2: Another option/solution
  • This concept is handy when you host lots of servers and you do not want to pay for lots of static IPs
  • You add a @reboot entry in your user's crontab to execute this script when the server boots

Resize AWS EC2 disk/volume/block

• Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/recognize-expanded-volume-linux.html
• Notes
  • The below commands assume drive "xvda" - which is the primary drive. If you are growing drive b, change accordingly.
• See existing details - execute commands:
  • lsblk
  • df -h
• Go to AWS => Console => Volume and set new size of the volume you wish to grow
• Grow the partition - execute terminal command:
  • sudo growpart /dev/xvda 1
• See new details - execute terminal commands:
  • lsblk
  • df -h
• Grow the file system - execute terminal command:
  • sudo resize2fs /dev/xvda1
• See new details - execute terminal command:
  • df -h