![]() If, instead, you want the smallest possible runtime images, with the fewest moving parts, and don't mind a bit of DIY, the runtime images might be a better fit.Īt Red Hat, we're continually evolving our containers to take advantage of the latest techniques and technologies. If you want these features, the full builder images might be for you. The existing builder images contain a number of features that are not present in the runtime images, including (but not limited to) a featureful run script the Prometheus agent for metric collection OpenShift readiness probes default JVM and garbage collection parameters and a wealth of environment variables for tuning the image. The main driver for the new runtime images was to ensure they consisted of as little as possible. This method also ensures that the image is rebuilt when the constituent parts change. The method described in this article allows you to customize and build a do-it-yourself (DIY) application image within OpenShift based on the new runtime images. Red Hat has introduced the new UBI OpenJDK runtime images to address this need. Some developers wish to have smaller images or images without the build tooling. However, the image's flexibility comes at the cost of image size. The Universal Base Images OpenJDK builder image were designed to meet the needs of a wide variety of customers wishing to build and deploy their software on OpenShift. $ export URI=" get route | grep quarkus-quickstart | awk '')" # Watch the build, to see when it completes $ oc new-app -context-dir=getting-started -name=quarkus-quickstart \ To get started with the Quarkus quickstart, make sure you are logged into an OpenShift instance and run the following commands: # Build the image on OpenShift S2I and Quarkus quickstart with the builder images We will use a Quarkus quickstart as the application source. This article explains how to use these new images within an OpenShift environment to automatically deploy your application using the S2I workflow. ![]() To address this need, Red Hat has released new OpenJDK runtime container images, which do not contain the full JDK or other build tooling. Some developers want their deployments to be based on a slimmer base image perhaps without Maven, or without the full JDK tooling, or both. With this workflow, the application is layered on top of the builder image, so the deployment contains the full JDK and Maven tooling. ![]() ![]() The OpenShift source-to-image (S2I) process makes it straightforward to build and update your application's source code within an OpenShift cluster, and your deployments will be updated whenever the underlying image or your application sources are updated. They contain the full Java Development Kit (JDK) including the development tools, Java compiler, Maven, and related build tooling. These "builder" images are designed to be suitable for building and running a wide range of Java-based applications, particularly when used in a Red Hat OpenShift environment. Universal Base Images is available to anyone under the terms of the UBI end user license agreement and is fully supported for Red Hat customers. Red Hat Universal Base Images (UBI) contain the full Red Hat build of OpenJDK. ![]()
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