SCM Web Hooks

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2023-12-01

In this recipe we will demonstrate the deployment of a very simple application via a GitHub Web Hook trigger.

Create a project

$ oc new-project scm-web-hooks --display-name="Test WebHooks"

Create new application

We will use the forked repository from the previous recipe.

$ oc new-app -S --image-stream=php
Image streams (oc new-app --image-stream=<image-stream> [--code=<source>])
-----
php
  Project: openshift
  Tags:    5.6, 7.0, latest

$ oc new-app --image-stream=php --code=https://github.com/jbosschina/bluegreen.git --name=scm-web-hooks
--> Found image 79f7d44 (8 weeks old) in image stream "openshift/php" under tag "7.0" for "php"

    Apache 2.4 with PHP 7.0
    -----------------------
    Platform for building and running PHP 7.0 applications

    Tags: builder, php, php70, rh-php70

    * The source repository appears to match: php
    * A source build using source code from https://github.com/jbosschina/bluegreen.git will be created
      * The resulting image will be pushed to image stream "scm-web-hooks:latest"
      * Use 'start-build' to trigger a new build
    * This image will be deployed in deployment config "scm-web-hooks"
    * Port 8080/tcp will be load balanced by service "scm-web-hooks"
      * Other containers can access this service through the hostname "scm-web-hooks"

--> Creating resources ...
    imagestream "scm-web-hooks" created
    buildconfig "scm-web-hooks" created
    deploymentconfig "scm-web-hooks" created
    service "scm-web-hooks" created
--> Success
    Build scheduled, use 'oc logs -f bc/scm-web-hooks' to track its progress.
    Run 'oc status' to view your app.

Look at some of the created resources

Build configuration

$ oc get bc

Deployment configuration

$ oc get dc

Show created service

$ oc get service

Show replication controller

$ oc get rc

Show route

$ oc get route

Notice that there is no route created yet for this application.

Show the builds in progress (Running)

$ oc get builds
NAME              TYPE      STATUS    POD
scm-web-hooks-1   Source    Running   scm-web-hooks-1-build

Monitor the build

$ oc logs build/scm-web-hooks-1

The build should finish similar to:

Pushing image 172.30.160.227:5000/scm-web-hooks-admin/scm-web-hooks:latest ...
Pushed 0/5 layers, 2% complete
Pushed 1/5 layers, 22% complete
Pushed 2/5 layers, 44% complete
Pushed 3/5 layers, 70% complete
Pushed 3/5 layers, 100% complete
Pushed 4/5 layers, 100% complete
Pushed 5/5 layers, 100% complete
Push successful

Create a route

$ oc expose service scm-web-hooks
route "scm-web-hooks" exposed

Test the application

Use scm-web-hooks-scm-web-hooks.apps.example.com to access the app, you should see

blue_deployment

Navigate to the OpenShift Web console and login.

Navigate to the OpenShift Web console and login.
Select your Test WebHooks project, and click Builds and then Builds.
Click onto the build name from the list. You should have just one in this case.
Click Configuration tab to get list of Triggers for the GitHub link.
Copy the GitHub webhook URL. You will need this URL for next step.

github_show_url

Configure GitHub repository Web Hook

Login to your GitHub account.
Navigate to the forked repository you used to create the application.
Click on Settings.
Click on Webhooks.
Click on the Add webhook button.
Add the recently copied Web Hook URL from OpenShift.
Change the Content-type as "application/json"
Click on the Disable SSL Verification button.
Confirm by adding the Add Webhook button in green at the bottom of the page.

Redeploy the application

Edit in your GitHub account the image.php file.
One of the lines in line 9 or 10 should be commented out. Make a change so that the line that was previously commented out becomes active and pound the other one.
Commit the file.

Monitor new deployment process

After saving/committing the image.php file with the small change, you’ll notice in the OpenShift Web Console that a new build process has been automatically triggered. You didn’t have to start a build yourself.
Monitor the build process using:

$ oc get builds

$ oc logs builds/scm-web-hooks-2
Cloning "https://github.com/jbosschina/bluegreen.git" ...
	Commit:	4969a28fd786392b20750987d9b5aa026e9cc63f (update image color)
	Author:	kylin <kylinsoong.1214@gmail.com>
	Date:	Sun Jul 16 18:46:08 2017 +0800
---> Installing application source...
Pushing image 172.30.160.227:5000/scm-web-hooks/scm-web-hooks:latest ...
Pushed 4/5 layers, 81% complete
Pushed 5/5 layers, 100% complete
Push successful