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Chapter 3. Deploying Quarkus Java applications to OpenShift

By using the Quarkus OpenShift extension, you can deploy your application to OpenShift using the Docker build strategy. The container is built inside the OpenShift cluster and provided as an image stream.

Your Quarkus project includes pre-generated Dockerfiles with instructions. When you want to use a custom Dockerfile, you need to add the file in the src/main/docker directory or anywhere inside the module. Additionally, you need to set the path to your Dockerfile using the quarkus.openshift.jvm-dockerfile property.

Prerequisites

  • Have a Quarkus Maven project that includes the quarkus-openshift extension.

  • Login to OpenShift using oc and select your project.

Procedure

  1. Change to the directory that contains your Quarkus project.

  2. Configure the following properties in your application.properties file:

    1. Set the Docker build strategy: 

      quarkus.openshift.build-strategy=docker
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    2. (Optional) If you are using an untrusted certificate, configure the KubernetesClient: 

      quarkus.kubernetes-client.trust-certs=true
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    3. (Optional) Expose the service to create an OpenShift route: 

      quarkus.openshift.expose=true
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    4. (Optional) Set the path to your custom Dockerfile: 

      quarkus.openshift.jvm-dockerfile=<path_to_your_dockerfile>
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      The following example shows the path to the Dockerfile.custom-jvm: 

      quarkus.openshift.jvm-dockerfile=src/main/resources/Dockerfile.custom-jvm
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  3. Package and deploy your Quarkus application to the current OpenShift project: 

    ./mvnw clean package -Dquarkus.kubernetes.deploy=true
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Verification

  1. View a list of pods associated with your current OpenShift project: 

    oc get pods
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  2. To retrieve the log output for your application’s pod, enter the following command where <pod_name> is the name of the latest pod prefixed with the name of your application: 

    oc logs -f <pod_name>
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