Interview Q&A / Docker & Kubernetes
Docker & Kubernetes interview questions
Images, containers, Dockerfiles, pods and deployments, from first principles.
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- What are init containers in Kubernetes and when would you use them?
Init containers run one after another, to completion, before the app containers start. Use them for setup such as waiting for a database, running migrations or fetching config. If one fails, the Pod restarts it.
IntermediateQuick answer1 min read - What is a sidecar container in a Kubernetes Pod?
A sidecar is a helper container running in the same Pod as the main app, sharing its network and volumes. Common uses are log shippers, proxies such as Envoy, and config reloaders.
IntermediateQuick answer1 min read