Amazon’s Ohio datacenter experienced a significant outage today. Amazon reported that “some instances within a single Availability Zone (USE2-AZ1) in the US-EAST-2 Region have experienced a loss of power”.
This was likely a non-event for big users because they’d have multiple availability zones, etc. and would probably just detect the failure and carry on. But it’s interesting to see that 38 different services was affected – everything from deployment tools to EC2 images to elastic containers to their blockchain DB (Quantum Ledger).
The loss of power is affecting part of a single data center within the affected Availability Zone. Power has been restored to the affected facility and at this stage the majority of the affected EC2 instances have recovered. We expect to recover the vast majority of EC2 instances within the next hour. For customers that need immediate recovery, we recommend failing away from the affected Availability Zone as other Availability Zones are not affected by this issue.
One sentence I found interesting was:
While the vast majority of Lambda functions continue operating normally, some functions are experiencing invocation failures and latencies, but we expect this to improve over the next 30 minutes.
This doesn’t mean your Lambda functions were failing, even if you selected US-East as your region. According to Amazon:
Lambda runs your function in multiple Availability Zones to ensure that it is available to process events in case of a service interruption in a single zone.
Overall, I suspect a lot of people running in US-East are going to have meetings over the next 24 hours to discuss parts of their infrastructure that they thought were HA and they weren’t.
Oddly, this kind of outage is probably going to increase AWS sales. They’ve got legions of locked-in users who will now pony up for more HA.
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this kind of things will always happen if you belongs to the biggest companies…
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