Kubernetes: Distributed Stateful Apps Using CockroachDB

Illustration by Zoë van Dijk

As recently as December 2017, running databases in Kubernetes was challenging — especially for mission-critical online transaction processing (OLTP) workloads whose databases require strong consistency. At that time, rescheduling a database pod (i.e. moving it to a different machine) meant that it lost the disk it was attached to, and that means that the state it was managing disappeared as well.

Naturally, teams still needed to run databases, and...

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