Answer
A command that checks container health; orchestrators restart containers if unhealthy.
Quick Answer
A healthcheck is a command Docker runs periodically inside the container to verify it's working correctly. If it fails repeatedly, Docker marks the container as unhealthy. Orchestrators use health status to decide when a container is ready for traffic or needs to be restarted — far smarter than just checking if the process is running.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ