How to make so that if a data center is hit by lightning, my site is not lying down for three days?

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... or how to organize the hosting architecture to achieve close to 100% uptime of the website without an apology for the interruptions with the electricity, lightning, abreact, etc.?


PS: get acquainted with the micro instances, so it is desirable to use them, but also other interesting analogues.
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To keep the cluster of servers in 2 data centers, preferably in different cities(e.g. MSK and Peter).
If one data center is "lies", then all of the servers automatically migrate in the 2nd. vmware vsphere — able to cheer.
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You will need access to the DNS entries of your domain/s and 4 ec2 instance.
1) Make one instance in each region available in EC2;
2) In each instance to install haproxy and a copy of the site;
3) to Create for each domain a record with the address of the instance;
4) Configure haproxy so that every request sent according to the chosen strategy on the web server of one of the 3 remaining instances;
5) Enjoy the results and earn income.
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Fell the host that promised 100% uptime. A month ago he was, now zip.
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How to protect a hard blast from the electromagnetic wave of a nuclear explosion? How to protect yourself from breakage of the Pacific cable? How to deal with electromigration in the chip? And finally, how to deal with the human factor?
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In this world nothing is absolute and eternal. And entropy we pleased really.
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You can:
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1) Put or rent even 1 server in another data center.
2) Make a mirror site using rsync + replication DB. Custom monitoring for accuracy of replication, do automatic recovery of replication when it fails.
3) set up a DNS record with a small TTL.
(click here for more information: habrahabr.ru/blogs/personal/87144/ )
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If it fails, we switch to the DNS to another server in minutes.
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The method is clumsy, but works for me. :)
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Heartbeat + DRBL
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Amazon EC2
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