We are upgrading our microservices in docker to use Java 17 and previously we used the base image openjdk:11-jre-slim. What is the corresponding image for Java 17?
There doesn't seem to be a openjdk:17-jre-slim? In fact there dont seem to be any recent jre images - just jdks. The 11-jre-slim image seems to be arount 75MB - is there a suitable similarly sized Java 17 image?
We have also used alpine images in the past too.
Oracle image is freely available from Java-17 openjdk:17-oracle
Dockerfile:
FROM openjdk:17-oracle
openjdk:17-jdk-slim also creates lightweight image
Dockerfile:
FROM openjdk:17-jdk-slim
You can try this (eclipse-temurin:17-jre-alpine) which is around 50MB of compressed size
https://hub.docker.com/layers/eclipse-temurin/library/eclipse-temurin/17-jre-alpine/images/sha256-839f3208bfc22f17bf57391d5c91d51c627d032d6900a0475228b94e48a8f9b3?context=explore
I couldn't sill find an OpenJDK jre image
An update on this - looking again at the Eclipse Adoptium issue mentioned above (https://github.com/adoptium/temurin-build/issues/2683) the more recent comments indicate they have now started producing JRE images.
We have switched to using eclipse-temurin:17-jre-focal. There is also a (slightly larger) 17-jre-centos7 and a smaller 17-jre-alpine, but we now need some libraries that aren't in alpine.
If you are looking for the tiniest Docker images with Alpine Linux and OpenJDK, have a look at Liberica JDK containers at DockerHub https://hub.docker.com/r/bellsoft/liberica-openjdk-alpine The images have Alpine and Liberica Lite, which is optimized in size to be used on microservices. It is also recommended by the Spring team https://spring.io/quickstart