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83 lines
2.8 KiB
Docker
83 lines
2.8 KiB
Docker
# ---------- 1) BUILD STAGE: Build the Spring PetClinic app with Maven ----------
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FROM eclipse-temurin:17-jdk as build
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# Install Maven Wrapper dependencies if needed
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WORKDIR /app
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# Copy only build-related files first to leverage Docker layer caching
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COPY mvnw ./
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COPY .mvn .mvn
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COPY pom.xml ./
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# Pre-fetch dependencies (faster builds)
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RUN chmod +x mvnw && ./mvnw -B -q -DskipTests dependency:go-offline
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# Now copy the sources and build the JAR
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COPY src ./src
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RUN ./mvnw -B -DskipTests package
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# Find the built jar (petclinic usually builds to target/*.jar)
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# We'll move it to a predictable location.
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RUN mkdir -p /out && cp target/*.jar /out/app.jar
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# ---------- 2) RUNTIME STAGE: Run the app with OpenTelemetry agent ----------
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FROM eclipse-temurin:17-jre as runtime
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RUN apt-get update && apt-get install -y jq && rm -rf /var/lib/apt/lists/*
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WORKDIR /app
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# ---- OpenTelemetry Java Agent version (editable) ----
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ARG OTEL_JAVA_AGENT_VERSION=1.33.4
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ENV OTEL_AGENT_DIR=/otel
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RUN mkdir -p ${OTEL_AGENT_DIR}
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# Download the OpenTelemetry Java agent
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# You can change the version above if needed.
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ADD https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases/download/v${OTEL_JAVA_AGENT_VERSION}/opentelemetry-javaagent.jar ${OTEL_AGENT_DIR}/otel-agent.jar
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# Copy app jar from the build stage
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COPY --from=build /out/app.jar /app/app.jar
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# ---- Default OpenTelemetry env vars (override in Render) ----
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# Service name as it will appear in Dynatrace
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ENV OTEL_SERVICE_NAME=petclinic
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# Set resource attributes (useful for filtering/grouping in Dynatrace)
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ENV OTEL_RESOURCE_ATTRIBUTES=service.namespace=demo,service.version=1.0.0,deployment.environment=render
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# Export traces (and optionally metrics/logs) to Dynatrace OTLP endpoint
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# You WILL override the endpoint and headers in Render dashboard.
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ENV OTEL_TRACES_EXPORTER=otlp
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ENV OTEL_METRICS_EXPORTER=none
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ENV OTEL_LOGS_EXPORTER=none
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# JVM options: attach the OTel Java agent
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ENV JAVA_TOOL_OPTIONS="-javaagent:/otel/otel-agent.jar"
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# Copy log forwarder
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COPY forward-logs.sh /app/forward-logs.sh
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RUN chmod +x /app/forward-logs.sh
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# Run PetClinic and log forwarder in same container
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ENTRYPOINT ["bash", "-c", "java -jar app.jar & /app/forward-logs.sh"]
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# Expose PetClinic default port (usually 8080)
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EXPOSE 8080
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# Health check (optional, adjust if your app exposes actuator/health)
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# HEALTHCHECK --interval=30s --timeout=5s --start-period=60s --retries=5 \
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# CMD curl -fsS http://localhost:8080/ || exit 1
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# Start the app
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# ---------- ADDITIONS FOR OPTION 2 LOG FORWARDING ----------
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# Copy log-forwarding script into container
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COPY forward-logs.sh /app/forward-logs.sh
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# Make the script executable
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RUN chmod +x /app/forward-logs.sh
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# Run both PetClinic and log forwarder in same container
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ENTRYPOINT ["bash", "-c", "java -jar app.jar & /app/forward-logs.sh"]
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