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How we migrated onto K8s in less than 12 months
Migrating onto Kubernetes can take years. Here’s why we decided it was worth undertaking, and how we moved a majority of our core services.
Since ECS doesn’t support StatefulSets, a Kubernetes primitive which allows persistent identity of pods, we instead came up with a way to wrap custom code into the etcd container startup to dynamically update cluster membership. This is easy on Amazon’s Elastic Kubernetes Service (EKS), which allows you to simply cordon off the bad node and let the API server move the pods off to another machine while respecting their shutdown routines. We knew there would inevitably be problems with the new platform, complex interactions, and general bugs that would require deep technical expertise and debugging capability, so we made sure we had a team that could tackle those challenges.
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