Adapt base image to jre alpine to save disk space and network usage #59

packs/appserver/Dockerfile

@@ -1,4 +1,4 @@
-FROM openjdk:8-jdk-alpine
+FROM openjdk:8-jre-alpine
 ENV PORT 8080
 EXPOSE 8080
 COPY target/*.war /opt/app.war

packs/gradle/Dockerfile

@@ -1,6 +1,6 @@
-FROM openjdk:8-jdk-slim
+FROM openjdk:8-jre-alpine
 ENV PORT 8080
 EXPOSE 8080
 COPY build/libs/*.jar /opt/app.jar
 WORKDIR /opt
-CMD ["java", "-jar", "app.jar"]
+ENTRYPOINT exec java -XX:+UnlockExperimentalVMOptions -XX:+UseCGroupMemoryLimitForHeap $JAVA_OPTS -jar app.jar

packs/gradle/charts/values.yaml

@@ -16,10 +16,10 @@ service:
  fabric8.io/ingress.annotations: "kubernetes.io/ingress.class: nginx"
 resources:
  limits:
- cpu: 500m
- memory: 512Mi
+ cpu: 1800m
+ memory: 768Mi
  requests:
- cpu: 400m
+ cpu: 600m
  memory: 512Mi
 probePath: /actuator/health
 livenessProbe:

packs/maven/Dockerfile

@@ -1,4 +1,4 @@
-FROM openjdk:8-jdk-slim
+FROM openjdk:8-jre-alpine
 ENV PORT 8080
 ENV CLASSPATH /opt/lib
 EXPOSE 8080
@@ -11,4 +11,5 @@ COPY pom.xml target/lib* /opt/lib/
 # we could do with a better way to know the name - or to always create an app.jar or something
 COPY target/*.jar /opt/app.jar
 WORKDIR /opt
-CMD ["java", "-jar", "app.jar"]
+
+ENTRYPOINT exec java -XX:+UnlockExperimentalVMOptions -XX:+UseCGroupMemoryLimitForHeap $JAVA_OPTS -jar app.jar

packs/maven/charts/values.yaml

@@ -16,10 +16,10 @@ service:
  fabric8.io/ingress.annotations: "kubernetes.io/ingress.class: nginx"
 resources:
  limits:
- cpu: 500m
- memory: 512Mi
+ cpu: 1800m
+ memory: 768Mi
  requests:
- cpu: 400m
+ cpu: 600m
  memory: 512Mi
 probePath: /actuator/health
 livenessProbe: