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14-Using-a-Custom-S2I-Image.adoc

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Using Custom S2I Image to deploy a SpringBoot Application

In this exercise we will deploy a SpringBoot application using a custom source to image builder image. You will learn how to use an s2i image that is not on openshift to build your application.

Step 1: Using the knowledge you gained from the earlier labs create a new project with name spring-UserName. Remember to substitute the UserName with your userid.

Step 2: Create a new application using SpringBoot S2I Builder image. Here we will deploy sample code from a git repository https://github.com/RedHatWorkshops/spring-sample-app. Please take time to understand the code; it is pretty simple.

You may want to clone this into your git repository and deploy that, if you want to make changes and test.

Note: We are using an S2I builder image from docker directly. This S2I builder image was created using this Dockerfile. https://github.com/codecentric/springboot-maven3-centos/blob/master/Dockerfile

$ oc new-app veermuchandi/spring-mvn-base~https://github.com/RedHatWorkshops/spring-sample-app --name=bootapp
--> Found Docker image c3ddd9e (7 days old) from Docker Hub for "veermuchandi/spring-mvn-base"

    Spring Boot Maven 3
    -------------------
    Platform for building and running Spring Boot applications

    Tags: builder, java, java8, maven, maven3, springboot

    * An image stream will be created as "spring-mvn-base:latest" that will track the source image
    * A source build using source code from https://github.com/RedHatWorkshops/spring-sample-app will be created
      * The resulting image will be pushed to image stream "bootapp:latest"
      * Every time "spring-mvn-base:latest" changes a new build will be triggered
    * This image will be deployed in deployment config "bootapp"
    * Port 8080/tcp will be load balanced by service "bootapp"
      * Other containers can access this service through the hostname "bootapp"

--> Creating resources with label app=bootapp ...
    imagestream "spring-mvn-base" created
    imagestream "bootapp" created
    buildconfig "bootapp" created
    deploymentconfig "bootapp" created
    service "bootapp" created
--> Success
    Build scheduled, use 'oc logs -f bc/bootapp' to track its progress.
    Run 'oc status' to view your app.

Expose Service to create a route

$ oc expose service bootapp
route "bootapp" exposed

Check the route

$ oc get route
NAME      HOST/PORT                                      PATH      SERVICES   PORT       TERMINATION
bootapp   bootapp-spring-UserName.apps.workshop.osecloud.com             bootapp    8080-tcp

Wait for your application to be built and deployed. Using the knowlege you gained from the previous labs, check your build logs by running oc logs -f <build pod name>

Step 3

Test your application by using the hostname assigned in the route.

Congratulations!! You are now running a SpringBoot application on OpenShift.