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Re:Ask HN: Best setups to avoid availability outages on AWS by explodingbarrel on Saturday June 30, 2012 @01:43PM (#4182261)
And also,

If shit really hits the fan, its not a bad idea to make sure you have a OpenVPN tunnel ready on each server.

This will allow to get connectivity between old and new instances if you can't update the security groups due to the API being down.

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