Kubernetes GitOps Configuration Example with Argo CD

Here's the current structure of the repo (will be modified soon):

├── apps
│   └── cert-manager
│       ├── secrets.yaml
│       ├── certificates.yaml
│       └── cluster-issuer.yaml
└── bootstrap
    ├── Chart.yaml
    ├── templates
    │   ├── cert-manager.yaml
    │   ├── postgresql.yaml
    │   ├── projects.yaml
    │   ├── vault.yaml
    │   └── vault-config-operator.yaml
    └── values.yaml

For now, it shows how to install and use in the GitOps way:

1. cert-manager via Helm chart

For more information you can refer to the articles:

1. Testing GitOps on Virtual Kubernetes Clusters with ArgoCD

Getting Started

You can test the configuration on the virtual Kubernetes cluster using the vcluster tool. In order to that create the ArgoCD ApplicationSet based on the cluster generator:

apiVersion: argoproj.io/v1alpha1
kind: ApplicationSet
metadata:
  name: config
  namespace: argocd
spec:
  generators:
    - clusters: # (1)
        selector:
          matchLabels:
            argocd.argoproj.io/secret-type: cluster
  template:
    metadata:
      name: '{{name}}-config-test'
    spec:
      destination:
        namespace: argocd
        server: https://kubernetes.default.svc
      project: default
      source:
        helm:
          parameters:
            - name: server
              value: '{{server}}'
            - name: project
              value: '{{metadata.labels.loft.sh/vcluster-instance-name}}'
        path: bootstrap
        repoURL: https://github.com/piomin/kubernetes-config-argocd.git
        targetRevision: '{{metadata.labels.loft.sh/vcluster-instance-name}}'
      syncPolicy:
        automated: {}
        syncOptions:
          - CreateNamespace=true

If you just want to test on the single cluster managed by ArgoCD you can create the following ArgoCD Application:

apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: config
  namespace: argocd
spec:
  destination:
    namespace: argocd
    server: https://kubernetes.default.svc
  project: default
  source:
    path: bootstrap
    repoURL: https://github.com/piomin/kubernetes-config-argocd.git
    targetRevision: HEAD
  syncPolicy:
    automated: {}
    syncOptions:
      - CreateNamespace=true