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// SPDX-FileCopyrightText: © 2022 Matthias Andreas Benkard <code@mail.matthias.benkard.de>
//
// SPDX-License-Identifier: GFDL-1.3-or-later
= openjdk-runtime
Matthias Andreas Benkard
// Meta
:experimental:
:data-uri:
:sectnums:
:toc:
:stem:
:keywords: mulk
// Settings
:icons: font
:source-highlighter: rouge
A container image that contains an OpenJDK runtime suitable for running
modern web services.
== Summary
This container image ships the latest OpenJDK feature release from
https://jdk.java.net[jdk.java.net] on top of a
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/building_running_and_managing_containers/assembly_types-of-container-images_building-running-and-managing-containers#con_understanding-the-ubi-micro-images_assembly_types-of-container-images[Red
Hat UBI Micro] base.
By default the image contains all modules shipped with OpenJDK.
== Building
[source,shell]
----
./prepare
docker build -t $IMAGE_NAME .
----
== Customization
You may want to customize the module set included in the JDK.
For example, say all you need are `java.base` and `java.naming`, then
the following excludes everything else contained in the OpenJDK
distribution:
[source,dockerfile]
----
RUN /jdk/*/bin/jlink \
-J-XX:MaxRAMPercentage=75 \
--add-modules java.base,java.naming \ #<1>
--compress=1 \
--no-man-pages \
--strip-debug \
--output /java
----
<1> Include the JDK modules that you need.
== Usage
[source,shell]
----
docker run $IMAGE_NAME java -version
----
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