GitOps and CI/CD implementation for SAP side-by-side use case demo

This repository contains the source to implement GitOps and CI/CD for the side-by-side backend and frontend demo applications using Argo CD and Tekton Pipelines

Instructions to deploy and test

All the required files to deploy and configure Argo CD and OpenShift Pipelines are included on this repo. The very first thing you must do is to fork and clone this repo as you will need to commit some changes into your own fork to check all the features in action.

You must be logged into your OpenShift Cluster using oc or kubectl client in order to follow the instructions bellow.

All the Tekton pipelines and required objects will be managed by Argo CD and these are part of the Argo CD Applications deployed by the instructions bellow. Different Tekton Pipelines will be automatically configured for dev and qa branches of the following repositories which contain the application code:

• Backend Microservice
• Frontend Microservice

To test all the capabilities included on this demo you will need to fork and clone both repositories as you will need to configure different Hooks in your forked repositories so you can test how changes on the dev or qa branches of those repositories go from there to a running microservice in OpenShift with your code.

The following files must be changed to point to your own repositories:

• app-fe-cicd/dev-webhook.yml
• app-fe-cicd/pipeline-resources.yml
• app-fe-cicd/qa-webhook.yml
• app-be-cicd/dev-webhook.yml
• app-be-cicd/pipeline-resources.yml
• app-be-cicd/qa-webhook.yml

Also you will need to change the following files to match your own repo for Argo CD so you can test changes in your configuration and see how Argo CD automatically syncs the information from GitHub into OpenShift:

• argocd/argo-app-be-qa.yml
• argocd/argo-app-be-cicd.yml
• argocd/argo-app-be-dev.yml
• argocd/argo-app-fe-dev.yml
• argocd/argo-app-fe-qa.yml
• argocd/argo-app-fe-cicd.yml

Deploy OpenShift Pipelines Operator (Tekton)

This can be done using the OpenShift Console as well, installing Red Hat OpenShift Pipelines Operator from OperatorHub. If you want to use the terminal instead, just execute the following instructions.

oc create -f tekton/subscription.yml

Deploy Argo CD Operator

This can be done using the OpenShift Console as well, installing OpenShift GitOps from OperatorHub. If you want to use the terminal instead, just execute the following instructions.

oc create -f argocd/subscription.yml

Create Cluster Role for Argo

oc create -f argocd/cluster-role-bind.yml

Create new Applications in Argo CD

oc create -f argocd/argo-app-be-dev.yml
oc create -f argocd/argo-app-be-qa.yml
oc create -f argocd/argo-app-fe-dev.yml
oc create -f argocd/argo-app-fe-qa.yml
oc create -f argocd/argo-app-be-cicd.yml
oc create -f argocd/argo-app-fe-cicd.yml

Get Argo CD credentials for admin user

oc get secret openshift-gitops-cluster -n openshift-gitops -o jsonpath='{.data.admin\.password}' | base64 -d

Check results

Use the credential for Argo CD admin user to login into Argo webconsole and you should see something similar to this, whith all the applications managed by Argo CD started to sync their objects into OpenShift.

If you click on any of the Applications you can see more details on the objects that have been synced already and the actual status.

If you check the existing Pipelines on any of the cicd Projects that have been created in OpenShift you will see the Pipeline status and the results from the first PipelineRun once you have committed any code to your GitHub dev or qa branches. This will not happen until you follow the last step explained bellow configuring your GitHub hooks to notify the EventListeners configured for your Pipelines.

Configure your GitHub hook

On each GitHub repository you need to configure 2 different hooks. Use the following command to get the endpoint information for each one:

• Frontend microservices hook endpoitns

   oc get routes -n app-fe-cicd fe-pipeline-webhook-dev -o jsonpath='{.spec.host}'
   oc get routes -n app-fe-cicd fe-pipeline-webhook-qa -o jsonpath='{.spec.host}'

• Backend microservices hook endpoitns

   oc get routes -n app-be-cicd be-pipeline-webhook-dev -o jsonpath='{.spec.host}'
   oc get routes -n app-be-cicd be-pipeline-webhook-qa -o jsonpath='{.spec.host}'