Answer
Healthchecks run periodically and transition through starting, healthy, and unhealthy states used by orchestrators.
Quick Answer
Docker's healthcheck runs a command periodically (default every 30s). After a configurable number of consecutive failures (default 3), the container's health status changes to "unhealthy." Orchestrators like Kubernetes or Docker Swarm use this to stop routing traffic to it and trigger a restart or replacement.
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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