update

Author: treddy08

content/modules/ROOT/nav.adoc

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 * xref:14-AI-bring-your-own-model.adoc[14. Bring your own model]
 
-* xref:15-troubleshooting.adoc[15. Troubleshooting]
+* xref:15-jenkins-ci.adoc[15. Jenkins CI]
+
+* xref:16-troubleshooting.adoc[16. Troubleshooting]
 

content/modules/ROOT/pages/15-jenkins-ci.adoc

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+== Jenkins CI
+
+Jenkins is used to build and test your product continuously, so developers can continuously integrate changes into the build. Jenkins is the most popular open source CI/CD tool on the market today and is used in support of DevOps, alongside other cloud native tools.
+
+This section demonstrates how *Developer Hub* allows you to instantiate a Quarkus application that is built using a Jenkins pipeline as well incorporating all aspects of RHTAP.
+
+=== Run the template
+
+. Login to developer hub and on the left menu click *Create*
+. Search for a template called *Securing a Quarkus Service Software Supply Chain (Jenkins)*
+. Once you find it, click on *Choose*
+. On the *Provide Information for Application* page, you may update the maven properties as you prefer or you can leave the defaults.
+. On the *Provide Image Registry Information*, select *Quay*
+. On the *Application repository Information*, you can enable commit signing if you wish or you can continue with the default values.
+. Click on create.  This should create the application repository, gitops repository and developer hub catalog item.
+. Click on *Open software component*
+. Click on the *CI* tab.  There should be 3 projects visible, one for build, one for preparing a pre-prod deployment and one for preparing a prod deployment.  A build should automatically trigger.  If this does not show up, click on a different tab and then click back to the *CI* tab to refresh the page.
+. You may click on the *View build* icon to view the output of the build on jenkins.  Enter the credentials provided on the demo landing page.
+. Once the build is complete, click on the *Topology* tab.  The application for *dev* is now healthy, indicated by a blue ring.  Click on the arrow on the application icon to view the Quarkus application.
+* To make changes to the Quarkus application, click on the *Overview* tab and select the *OpenShift Dev Spaces (VS Code)* link.  This should provision a *DevSpaces* project where you can update the source code as you wish.  Pushing the changes back to GitLab triggers a new build and deploy to dev.
+
+=== Promote to preprod
+. To deploy your Quarkus application to preprod, switch to the *Overview* tab and click on the *Source Code* link.  This should open the repository root on GitLab.
+. On the left menu, select *Code* and then *Tags*.
+. Click on *New Tag*
+. Give the tag a name such as `v1.0`
+. Click on *Create tag*
+. Switch back to *Developer Hub* and click on the *CI* tab.  A new preprod build will be triggered.
+. Wait for the build to complete and then click on the *Topology* tab.  The application for *preprod* is now healthy, indicated by a blue ring.  Click on the arrow on the application icon to view the Quarkus application.
+
+=== Promote to preprod
+. To deploy your Quarkus application to preprod, switch to the *Overview* tab and click on the *Source Code* link.  This should open the repository root on GitLab.
+. On the left menu, select *Code* and then *Tags*.
+. Click on *New Tag*
+. Give the tag a name such as `v1.0`
+. Click on *Create tag*
+. Switch back to *Developer Hub* and click on the *CI* tab.  A new preprod build will be triggered.
+. Wait for the build to complete and then click on the *Topology* tab.  The application for *preprod* is now healthy, indicated by a blue ring.  Click on the arrow on the application icon to view the Quarkus application.