Amazon S3 underpins many AWS services, including AWS Lambda, Elastic BeanStalk, and Amazon’s own Service Health Dashboard. It also serves as an object and media store for many other internet services that rely on it every day.
On February 28th, 2017 AWS experienced an hours long outage of the Amazon S3 Service in US-EAST–1 region. That created a cascading effect of outages across a good chunk of the internet, including services like Dockerhub.
A human error turned out to be the root cause: