We have a cloud server on Amazon EC2. Our old admin setup the DNS and Mail Server on one server that is working fine but I just realized now that the instance is on Instance store not an EBS backed. So the hardware could be failed any time and we will loose all our emails etc.
So I want to migrate that instance from Instance Store to EBS Backed instance, also I want to split the DNS from Mail(Zimbra Server) before the migration so our other sites should not effect with this migration.
I need some solution, how to migrate from Instance store to EBS instance with less down time.
Here is a post on stackoverflow that shows how to migrate your running instance to an EBS backed AMI.
If you go this way, I would strongly suggest to test this on a throw-away instance first.
Another option would be to create a new EBS volume, mount it to your existing instance and move your mail folder onto the EBS volume. After this you can symlink the new folder into its original location. You now have your mails on an EBS volume with all its benefits like snapshots etc. Then you can start to set up your new server with a new EBS-backed AMI and simply attach this volume to your server, keeping all your mails.