mcaimi / k8s-demo-argocd

K8S QUARKUS APPLICATION DEMO: GitOps with ArgoCD

This repo holds the deployment manifests templates that are used to deploy the demo application built from this repository into a compatible Kubernetes or Openshift cluster.

This demo uses:

• Git as the source of truth for templates
• ArgoCD as the deployment manager.
• Quarkus as the application runtime for the demo app
• PostgreSQL as a backend relational DB
• ServiceMesh for security, observability

Deploy Operators

Cluster configuration is performed in a GitOps native way. Relevant components are deployed as part of the application itself:

• The Openshift GitOps Operator and ArgoCD Application Controller
• The Openshift Pipelines Operator
• The Openshift Service Mesh Operator and Control Plane instance

$ oc apply -k config/ocp-gitops/operator

Once ArgoCD is up & running, let's install the remaining dependencies

$ oc apply -k config/ocp-pipelines/argocd
$ oc apply -k config/ocp-servicemesh/argocd

At some point, the status of every application will converge to an healthy and synced state.

Deploy Tekton Pipelines and Build the Application

The application lifecycle is managed through ArgoCD:

• There is one folder that contains Tekton Build Pipelines and Pipeline Triggers used to build the runnable container image
• Another folder contains the Quarkus Application deployment manifests
• Servicemesh configuration is configured as a standalone ArgoCD Application as well as the backend DB.

First step, deploy the CI Pipelines and frontend deployment manifests:

$ oc apply -k application/quarkus-notes/

At this point, the Backend Database deployment Application and Servicemesh Configuration Application can be created:

$ oc apply -k application/postgres
$ oc apply -k application/servicemesh

Lastly, the Quarkus App must be built. Either run the pipeline or configure a Git webhook that calls into the EventListener in tekton.