Tinglwan add nativeimage

java/autonomousdb-wallet-secret-sample/README.md

@@ -17,6 +17,7 @@ If you want to configure a previously downloaded wallet you can just create the
 ```sh
 kubectl create secret generic instance-wallet --from-file=<path-to-wallets-unzipped-folder>
 ```
+
 The Java microservice retrieves username, password and url also from a secret. To create it you can use the following script as an example:
 
 ```sh
@@ -25,6 +26,7 @@ kubectl create secret generic user-jdbc \
  --from-literal=password='<password>' \
  --from-literal=url='jdbc:oracle:thin:@<alias-in-tnsnames.ora>'
 ```
+
 ## Install, build and deploy
 
 It is as simple as to build the maven project, create the docker image and deploy the Pod:
@@ -35,6 +37,16 @@ docker build -t adb-health-check target
 kubectl apply -f target/app.yaml
 ```
 
+If you want to run the application as a [GraalVM Native Image](https://www.graalvm.org/reference-manual/native-image/), it is very likely that the build process will be frozen since GraalVM Native Image compilation process is really RAM-intensive. To prevent from the issue, we recommend allotting the Docker engine around **9 to 12 GB of RAM**.
+
+After that, simply specify the different Dockerfile `target/Dockerfile.nativeimage` and repeat the rest of the steps. 
+
+```sh
+mvn clean install
+docker build -f target/Dockerfile.nativeimage -t adb-health-check target
+kubectl apply -f target/app.yaml
+```
+
 ## Usage
 
 After successsful installation you can validate first connectivity through the Pod's log:

java/autonomousdb-wallet-secret-sample/pom.xml

@@ -110,6 +110,7 @@
 <filtering>true</filtering>
 <includes>
 <include>Dockerfile</include>
+<include>Dockerfile.nativeimage</include>
 </includes>
 </resource>
 <resource>
@@ -159,4 +160,4 @@
 <version>21.3.0.0</version>
 </dependency>
 </dependencies>
-</project>
+</project>

java/autonomousdb-wallet-secret-sample/src/main/docker/Dockerfile.nativeimage

@@ -0,0 +1,22 @@
+FROM ghcr.io/graalvm/graalvm-ce:21.3.0
+RUN gu install native-image
+
+RUN mkdir /app
+COPY libs /app/libs
+COPY ${project.artifactId}.jar /app
+
+RUN native-image -jar /app/${project.artifactId}.jar -H:Name=/app/${project.artifactId}
+
+FROM oraclelinux:8-slim
+RUN mkdir /app
+COPY --from=0 "/app/${project.artifactId}" "/app/${project.artifactId}"
+WORKDIR /app
+
+# The driver will look for the wallet in folder /app/wallet 
+# This value must match the one in the mountPath of the container
+# Reference in src/main/k8s/app.yaml
+
+CMD ["/app/${project.artifactId}", \
+ "-Doracle.net.tns_admin=/app/wallet", \
+ "-Doracle.net.wallet_location=/app/wallet", \
+ "-Doracle.jdbc.fanEnabled=false"]