I have Elastic IP, I have EC2 instance. If I reboot the instance elastic IP becomes detached. How can I make it persistent?
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Elastic IPs are not detached when you reboot an EC2 instance inside a VPC. They are also not detached when you stop then start your instance.
If you're using EC2-Classic and you stop, then start your instance it may be disassociated. EC2-Classic is really, really old now and probably should be upgraded.
From AWS docs
When you stop a running instance, the following happens: The instance retains its associated Elastic IP addresses. You're charged for any Elastic IP addresses associated with a stopped instance. With EC2-Classic, an Elastic IP address is dissociated from your instance when you stop it. For more information, see EC2-Classic.
Tim
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