Image probably absent in the docker beginner tutorial

kennethskyu · January 31, 2022, 8:32am

hi,

I am following the instructions from the following webpage:

docker/labs/blob/master/developer-tools/java/chapters/ch03-build-image-java-9.adoc#create-a-docker-image-using-jdk-9-and-a-java-application

:toc:

:imagesdir: images

= Build a Docker Image with JDK 9

*PURPOSE*: This chapter explains how to create a Docker image with JDK 9.

The link:ch03-build-image.adoc[prior chapter] explained how, in general, to build a Docker image with Java.
This chapter expands on this topic and focuses on JDK 9 features.

== Create a Docker Image using JDK 9

Create a new directory, for example `docker-jdk9`.

In that directory, create a new text file `jdk-9-debian-slim.Dockerfile`.
Use the following contents:

[source, text]
----

This file has been truncated. show original

But the following error message prompted out:

Is there any alternative image for me to proceed the tutorial? thx

terpz · January 31, 2022, 1:02pm

Can you provide with your dockerfile, if i read the guide correct, you should have this in your dockerfile:

# Hello world application with custom Java runtime with just the base module and Debian slim
FROM debian:stable-slim
COPY target/openjdk-9-base_linux-x64 /opt/jdk-9
COPY target/helloworld-1.0-SNAPSHOT.jar /opt/helloworld/helloworld-1.0-SNAPSHOT.jar
# Set up env variables
ENV JAVA_HOME=/opt/jdk-9
ENV PATH=$PATH:$JAVA_HOME/bin
CMD java -XX:+UnlockExperimentalVMOptions -XX:+UseCGroupMemoryLimitForHeap \
  -cp /opt/helloworld/helloworld-1.0-SNAPSHOT.jar org.examples.java.App

if you have this, it shoudnt come with that error you have

kennethskyu · February 3, 2022, 2:16am

terpz:

me with just the base module and Debian slim
FROM debian:stable-slim
COPY target/openjdk-9-base_linux-x64 /opt/jdk-9
COPY target/helloworld-1.0-SNAPSHOT.jar /opt/helloworld/helloworld-1.0-SNAPSHOT.jar
# Set up env variables
ENV JAVA_HOME=/opt/jdk-9
ENV PATH=$PATH:$JAVA_HOME/bin
CMD java -XX:+UnlockExperimentalVMOptions -XX:+UseCGroupMemoryLimitForHeap \
  -cp /opt/helloworld/helloworld-1.0-SNAPSHOT.jar org.examples.java.App

thx Martin, and sorry that the notification email of your reply fell into the junk email folder, so i reply you this late.

I just copied from the tutorial webpage for the content of Dockerfile:

Hello world application with JDK 9 and Debian slim

FROM jdk-9-debian-slim
COPY target/helloworld-1.0-SNAPSHOT.jar /opt/helloworld/helloworld-1.0-SNAPSHOT.jar

Set up env variables

CMD java -XX:+UnlockExperimentalVMOptions -XX:+UseCGroupMemoryLimitForHeap
-cp /opt/helloworld/helloworld-1.0-SNAPSHOT.jar org.examples.java.App

The content of your Dockerfile is at the end of that tutorial page? I guess it’s different part of tutorial?