Argo CD: The Declarative Way

The commands we have explored so far are useful, but they are imperative. In a world of "everything-as-code," it's often better to use the declarative way of doing things.

# Example of an imperative command to create an application
argocd app create flask-app \
    --repo https://github.com/eon01/argocd-examples/ \
    --path flask-app \
    --dest-server https://kubernetes.default.svc \
    --dest-namespace flask-app \
    --revision main \
    --sync-policy automated \
    --self-heal \
    --auto-prune \
    --allow-empty

Using the declarative approach means that we can define the application in a representative YAML
manifest file that describes the desired state of the Application resource, and then apply it and reapply it as needed.

Let's delete the previous application:

argocd app delete flask-app -y

Then, let's recreate it using this YAML:

kubectl apply -f - <
---
apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: flask-app
  namespace: argocd

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