Spring Boot Actuator based Docker HEALTHCHECK

Dockerfile

FROM openjdk:11-jre-slim

EXPOSE 8080

ENV TZ=Europe/Moscow

RUN adduser --system --group --home /opt/app appuser

RUN apt-get update \
 && apt-get install -y --no-install-recommends curl jq \
 && rm -rf /var/lib/apt/lists/*

ARG JAR_FILE=target/*.jar
COPY --chown=appuser:appuser ${JAR_FILE} /opt/app/application.jar

USER appuser
WORKDIR /opt/app
ENTRYPOINT ["java", "-jar", "/opt/app/application.jar"]

HEALTHCHECK --start-period=30s --interval=30s --timeout=3s --retries=3 \
            CMD curl --silent --fail --request GET http://localhost:8080/actuator/health \
                | jq --exit-status '.status == "UP"' || exit 1

jq have a bug, ad empty response is evalueted to true..

i succeeded in compose file with:

test: curl -m 5 --silent --fail --request GET http://localhost:8080/actuator/health | jq --exit-status -n 'inputs | if has("status") then .status=="UP" else false end' > /dev/null || exit 1

@marcoberri Yes, indeed:

echo '' | jq --exit-status '.status == "UP"'

Doesn't print anything, and exit code is 0. Good catch!

it's work for me!

test : curl -m 5 --silent --fail --request GET http://localhost:8080/actuator/health | jq --exit-status -n 'inputs | if has("status") then .status=="UP" else false end' > /dev/null || exit 1