One of the key challenges in running containerized workloads is dealing with persistence. Unlike virtual machines that offer durable and persistent storage, containers come with ephemeral storage. Right from its inception, Dockerencouraged the design of stateless services. Persistence and statefulness are an afterthought in the world of containers. But this design works in favor of workload scalability and portability. It is one of the reasons why containers are fueling cloud-native architectures, microservices, and web-scale deployments.
Having realized the benefits of containers, there is an ongoing effort to containerize stateful applications that can be seamlessly run with stateless application. Docker volumes and plugins are a major step towards turning stateful applications into first-class citizens of Docker.
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