Which of the following is the correct way to define a Docker health check that uses curl to verify a Spring Boot app's /actuator/health endpoint?

easy📝 Syntax Q3 of 15

Spring Boot - Docker and Deployment

Which of the following is the correct way to define a Docker health check that uses curl to verify a Spring Boot app's /actuator/health endpoint?

AHEALTHCHECK EXEC curl http://localhost:8080/actuator/health

BHEALTHCHECK RUN curl http://localhost:8080/actuator/health

CHEALTHCHECK CMD curl -f http://localhost:8080/actuator/health || exit 1

DHEALTHCHECK CMD-TEST curl http://localhost:8080/actuator/health

Step-by-Step Solution

Solution:

Step 1: Identify correct HEALTHCHECK syntax
The correct Dockerfile syntax uses HEALTHCHECK CMD followed by the command.
Step 2: Use curl with -f flag
The -f flag makes curl fail on HTTP errors, which is needed for health check.
Final Answer:
HEALTHCHECK CMD curl -f http://localhost:8080/actuator/health || exit 1 -> Option C
Quick Check:
Use HEALTHCHECK CMD with curl -f for proper health checks [OK]

Quick Trick: Use HEALTHCHECK CMD with curl -f and exit 1 [OK]

Common Mistakes:

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