Enable GraalVM

Dockerfile.graalvm

@@ -0,0 +1,24 @@
+FROM ghcr.io/graalvm/native-image-community:23 AS build
+
+RUN microdnf install -y maven
+
+WORKDIR /app
+
+COPY . /app
+
+RUN mvn -Pnative package
+
+RUN mkdir -p /out && ldd /app/target/server | awk 'NF == 4 { system("cp --parents " $3 " /out") }'
+
+FROM scratch
+
+WORKDIR /app
+
+COPY --from=build /out /
+COPY --from=build /app/target/server ./
+COPY --from=build /usr/lib/ld-linux-*.so.* /lib/
+
+USER 10000
+EXPOSE 8080
+
+ENTRYPOINT ["./server"]

demo.sh

@@ -30,23 +30,16 @@ function _get_stats {
 }
 
 # Deploy initial version
-info "Deploy initial version of java web server"
+info "Deploy version 1 of java web server"
 kubectl create deployment java-server --image "$(sudo docker images --filter=reference='*/java-server:v1' --format "{{.Repository}}"):v1" --replicas 20
 _get_stats
 
-# Deploy distroless image
-info "Upgrade the version of java web server"
+# Deploy distroless jdeps/jlink image
+info "Upgrade java web server to version 2"
 kubectl set image deployments/java-server java-server="$(sudo docker images --filter=reference='*/java-server:v2' --format "{{.Repository}}"):v2"
 _get_stats
 
-# Warm-up stats
-
-# Roll back previous image
-info "Roll back the version of java web server"
-kubectl set image deployments/java-server java-server="$(sudo docker images --filter=reference='*/java-server:v1' --format "{{.Repository}}"):v1"
-_get_stats
-
-# Roll back to distroless image
-info "Roll back the version of java web server"
-kubectl set image deployments/java-server java-server="$(sudo docker images --filter=reference='*/java-server:v2' --format "{{.Repository}}"):v2"
+# Deploy distroless graalvm image
+info "Upgrade java web server to version 3"
+kubectl set image deployments/java-server java-server="$(sudo docker images --filter=reference='*/java-server:v2' --format "{{.Repository}}"):v3"
 _get_stats

pom.xml

@@ -10,6 +10,13 @@
   </properties>
   <build>
     <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <configuration>
+          <fork>true</fork>
+        </configuration>
+      </plugin>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-jar-plugin</artifactId>
@@ -23,4 +30,27 @@
       </plugin>
     </plugins>
   </build>
+  <profiles>
+    <profile>
+      <id>native</id>
+      <build>
+        <plugins>
+          <plugin>
+            <groupId>org.graalvm.buildtools</groupId>
+            <artifactId>native-maven-plugin</artifactId>
+            <extensions>true</extensions>
+            <executions>
+              <execution>
+                <id>build-native</id>
+                <goals>
+                  <goal>compile-no-fork</goal>
+                </goals>
+                <phase>package</phase>
+              </execution>
+            </executions>
+          </plugin>
+        </plugins>
+      </build>
+    </profile>
+  </profiles>
 </project>

scripts/configure.sh

@@ -122,6 +122,7 @@ function _build_imgs {
 
     _build_img v1
     _build_img v2 Dockerfile.distroless "true"
+    _build_img v3 Dockerfile.graalvm "true"
     registry_name="$(sudo docker ps --filter ancestor=electrocucaracha/nginx:vts --format "{{.Names}}")"
     registry_ip="$(sudo docker inspect --format '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{"\n"}}{{end}}' "$registry_name" | awk 'NR==1{print $1}')"
     curl -s "http://${registry_ip}:5001/v2/java-server/tags/list" | jq -r .