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Amazon's EC2 Reboot in Focus

Posted on 9.29.2014

Amazon Web Services (AWS) is providing more details on a major instance reboot of its Elastic Compute Cloud (EC2) that is set to take place sometime this week. 

Amazon apparently won't be providing details about what the actual issue is, but the word around the digital water cooler is that it is related to the Xen hypervisor (and nothing to do with the Bash - or Shellshock - vulnerability revealed recently). 

Less than 10 pecent of Amazon's EC2 instances will be affected by this "operational" update.

“As we explained in emails to the small percentage of our customers who are affected and on our forums, the instances that need the update require a system restart of the underlying hardware and will be unavailable for a few minutes while the patches are being applied and the host is being rebooted,” Amazon’s Jeff Barr wrote in a blog post.

Customers who aren’t sure if they are impacted should go to the “Events“ page on the EC2 console, which will list any pending instance reboots for their AWS account. Amazon also indicated that instances requiring a reboot will be staggered so no two regions or availability zones will be impacted at the same time and will restart with all saved data and all automated configuration intact.

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