Docker and CI/CD · Junior · Question 38 of 75

What does a `HEALTHCHECK` instruction add to a container?

✓Correct answer: A command Docker runs periodically to mark it healthy or not
2A metrics endpoint that monitoring tools can scrape
3Automatic restarts whenever the container uses too much CPU

Explanation

Status appears in docker ps and can gate Compose startup (service_healthy). Plain Docker doesn't restart unhealthy containers by itself.

Further reading

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