Digital Ocean is taking one giant step into making applications highly available. Introducing the floating IPs, an address that can be instantly moved from one droplet into another in the same data center. It can be pointed to a redundant server. The approach is very similar to Amazon Web Services‘ Elastic IP, where an IP address can be assigned to any EC2 server. Since there’s a shortage of IP4 addresses, Digital Ocean just like AWS, charges for any unused IP address at $0.006 per hour.
Read more on how it works.