Implement CD Pipeline Using Argo for hyperswitch-helm

.github/workflows/ArgoCD-Deploy.yml

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+# This is a basic workflow to help deploy an application to ArgoCD
+name: ArgoCD-Deploy
+
+# Controls when the workflow will run
+on:
+  workflow_dispatch:
+    inputs:
+      logLevel:
+        description: 'Application Name'     
+        required: true
+        default: 'Please select application name'
+
+jobs:
+  infra-deploy:
+    # The type of runner that the job will run on
+    runs-on: runner
+    env: 
+      GITHUB_USERNAME: '${{secrets.GITHUB_ID}}'
+      GITHUB_PASSWORD: '${{secrets.GITHUB_SECRET}}'
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v2
+        with: 
+            path: hyperswitch-helm
+
+      # Runs a kubectl apply command to deploy the application to ArgoCD
+      - name: ${{ github.event.inputs.logLevel }}
+        run: |
+          kubectl apply -f hyperswitch-helm/charts/incubator/hyperswitch-cd/${{github.event.inputs.logLevel}}-argo-application.yml

charts/incubator/hyperswitch-cd/Chart.yml

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+apiVersion: v2
+appVersion: 1.16.0
+description: A Helm chart for Kubernetes to deploy hyperswitch application
+name: hyperswitch-cd
+type: application
+version: 0.1.0
+dependencies:
+  - name: argocd
+    version: 2.10.5
+    repository: https://charts.bitnami.com/bitnami
+    condition: argocd.enabled

charts/incubator/hyperswitch-cd/README.md

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+# Implement CD Pipeline Using Argo: Proposal
+
+This proposal attemps to implement CD pipeline to automate the deployment process using Argo.
+
+##  Folder Tree
+
+- The proposed setup contains a `hyperstack-cd` folder at `charts/incubator` level so as to achieve a proper structure and readiness.
+
+- There is an argo config file built for each workload with the naming convention `{app_name}-argo-application.yml` which ofcourse can be automated through workflows.
+- The tree layout would look like:
+
+```text
+.
+├── charts/incubator
+│   ├── hyperswitch-app
+│   ├── hyperswitch-card-vault
+│   ├── hyperswitch-cd
+│   │   ├── {app_name}-argo-application.yml
+│   ├── hyperswitch-sdk
+│   ├── hyperswitch-stack
+|── repo 
+```
+
+##  How It Works
+
+- A workflow is created to deploy applications to reduce any human interventions.
+- Simply run the `ArgoCD-Deploy` workflow from the GitHub Actions mentioning the application name that needs to be deployed.
+- As of now, the configurations are done based on my local cluster configuration. 
+
+
+##  Getting Started
+
+Inside the cluster, following steps have to be performed in order to install argocd cli and argocd API Server:
+
+- Install `kubectl` command line tool. [Install kubectl](https://kubernetes.io/docs/tasks/tools/)
+- Have a `kubeconfig` file (default location is ~/.kube/config).
+- Install ArgoCD.
+```
+kubectl create namespace argocd
+kubectl apply -n argocd -f https://raw.githubusercontent.com/argoproj/argo-cd/stable/manifests/install.yaml
+```
+- Configuration of the certificates for the TLS endpoints is required explicitly.
+- Install the ArgoCD CLI. For MacOS, it is
+```
+brew install argocd
+````
+- Change the argocd-server service type to LoadBalancer:
+```
+kubectl patch svc argocd-server -n argocd -p '{"spec": {"type": "LoadBalancer"}}'
+```
+- Port Forwarding.
+```
+kubectl port-forward svc/argocd-server -n argocd 8080:443
+```
+
+The ArgoCD API Server can then be accessed at https://localhost:8080
+
+##  Achievements
+
+- I was able to deploy the applications in my local setup using Argo.
+- However, I was using an AMD64 based machine and the image is built using ARM architecture. Due to the same reason, pods were not coming up. Getting `exec /bin/sh: exec format error` in ArgoCD logs.
+
+## What's Next
+
+- This setup can be leveraged to achieve environment specific configurations by having respective branches e.g. dev, stg and prod.
+- Pipelines can be setup to build argocd config files from one env to other.

charts/incubator/hyperswitch-cd/hyperswitch-app-argo-application.yml

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+apiVersion: argoproj.io/v1alpha1
+kind: ApplicationSet
+metadata:
+  name: hyperswitch-app-prod-app-set
+  labels:
+     app: hyperswitch-app-prod-set
+  namespace: argocd
+  finalizers:
+    - resources-finalizer.argocd.argoproj.io
+spec:
+  generators:
+  - list:
+      elements:
+      - cluster: local-as1
+        url: https://kubernetes.default.svc
+        helm_value: values.yaml
+  template:
+      metadata:
+        name: 'hyperswitch-app-prod-app-{{cluster}}'
+      spec:
+        project: default
+        source:
+          path: charts/incubator/hyperswitch-app
+          repoURL: 'https://github.com/juspay/hyperswitch-helm.git'
+          targetRevision: HEAD
+          helm:
+            valueFiles:
+              - '{{helm_value}}'
+        destination:
+          server: '{{url}}'
+          namespace: hyperswitch-app-prod
+        syncPolicy:
+          syncOptions:
+          - CreateNamespace=true
+          automated:
+            selfHeal: true
+            prune: true

charts/incubator/hyperswitch-cd/hyperswitch-card-vault-argo-application.yml

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+apiVersion: argoproj.io/v1alpha1
+kind: ApplicationSet
+metadata:
+  name: hyperswitch-card-vault-prod-app-set
+  labels:
+     app: hyperswitch-card-vault-prod-set
+  namespace: argocd
+  finalizers:
+    - resources-finalizer.argocd.argoproj.io
+spec:
+  generators:
+  - list:
+      elements:
+      - cluster: local-as1
+        url: https://kubernetes.default.svc
+        helm_value: values.yaml
+  template:
+      metadata:
+        name: 'hyperswitch-card-vault-prod-app-{{cluster}}'
+      spec:
+        project: default
+        source:
+          path: charts/incubator/hyperswitch-card-vault
+          repoURL: 'https://github.com/juspay/hyperswitch-helm.git'
+          targetRevision: HEAD
+          helm:
+            valueFiles:
+              - '{{helm_value}}'
+        destination:
+          server: '{{url}}'
+          namespace: hyperswitch-card-vault-prod
+        syncPolicy:
+          syncOptions:
+          - CreateNamespace=true
+          automated:
+            selfHeal: true
+            prune: true

charts/incubator/hyperswitch-cd/hyperswitch-sdk-argo-application.yml

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+apiVersion: argoproj.io/v1alpha1
+kind: ApplicationSet
+metadata:
+  name: hyperswitch-sdk-prod-app-set
+  labels:
+     app: hyperswitch-sdk-prod-set
+  namespace: argocd
+  finalizers:
+    - resources-finalizer.argocd.argoproj.io
+spec:
+  generators:
+  - list:
+      elements:
+      - cluster: local-as1
+        url: https://kubernetes.default.svc
+        helm_value: values.yaml
+  template:
+      metadata:
+        name: 'hyperswitch-sdk-prod-app-{{cluster}}'
+      spec:
+        project: default
+        source:
+          path: charts/incubator/hyperswitch-sdk
+          repoURL: 'https://github.com/juspay/hyperswitch-helm.git'
+          targetRevision: HEAD
+          helm:
+            valueFiles:
+              - '{{helm_value}}'
+        destination:
+          server: '{{url}}'
+          namespace: hyperswitch-sdk-prod
+        syncPolicy:
+          syncOptions:
+          - CreateNamespace=true
+          automated:
+            selfHeal: true
+            prune: true

charts/incubator/hyperswitch-cd/hyperswitch-stack-argo-application.yml

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+apiVersion: argoproj.io/v1alpha1
+kind: ApplicationSet
+metadata:
+  name: hyperswitch-stack-prod-app-set
+  labels:
+     app: hyperswitch-stack-prod-set
+  namespace: argocd
+  finalizers:
+    - resources-finalizer.argocd.argoproj.io
+spec:
+  generators:
+  - list:
+      elements:
+      - cluster: local-as1
+        url: https://kubernetes.default.svc
+        helm_value: values.yaml
+  template:
+      metadata:
+        name: 'hyperswitch-stack-prod-app-{{cluster}}'
+      spec:
+        project: default
+        source:
+          path: charts/incubator/hyperswitch-stack
+          repoURL: 'https://github.com/juspay/hyperswitch-helm.git'
+          targetRevision: HEAD
+          helm:
+            valueFiles:
+              - '{{helm_value}}'
+        destination:
+          server: '{{url}}'
+          namespace: hyperswitch-stack-prod
+        syncPolicy:
+          syncOptions:
+          - CreateNamespace=true
+          automated:
+            selfHeal: true
+            prune: true