Switching to newer JDK versions for container images? #13380

sgrimm · 2022-07-28T00:40:12Z

sgrimm
Jul 28, 2022

What are the prospects for upgrading from Java 11 to a newer release in the official container images? There have been a lot of efficiency improvements, especially in the area of GC.

I tried a naive approach, changing the Dockerfile to install Java 17 instead of 11:

--- a/quarkus/container/Dockerfile
+++ b/quarkus/container/Dockerfile
@@ -23,7 +23,7 @@ ENV LANG en_US.UTF-8
 COPY --from=build-env --chown=1000:0 /opt/keycloak /opt/keycloak
 
 RUN microdnf update -y && \
-    microdnf install -y --nodocs java-11-openjdk-headless glibc-langpack-en && microdnf clean all && rm -rf /var/cache/yum/* && \
+    microdnf install -y --nodocs java-17-openjdk-headless glibc-langpack-en && microdnf clean all && rm -rf /var/cache/yum/* && \
     echo "keycloak:x:0:root" >> /etc/group && \
     echo "keycloak:x:1000:0:keycloak user:/opt/keycloak:/sbin/nologin" >> /etc/passwd

This seems to work flawlessly in my testing, but obviously I am just one user, and I have no idea if there are configurations that completely break on newer Java versions.

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Switching to newer JDK versions for container images? #13380

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Switching to newer JDK versions for container images? #13380

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sgrimm Jul 28, 2022

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sgrimm
Jul 28, 2022