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Creating an Environment as an Application of Applications

Creating an Environment as an Application of Applications

Learn how to create an environment as an application of applications.

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What do we need?

We need to define an Argo CD app of the apps. We’ll create an application that will reference those two applications (or whichever other we add there later). Those, in turn, will be referencing the “base” app manifests stored in application repositories.

That might be confusing, so let's look at yet another Argo CD Application definition.

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cat apps.yaml

The output is as follows.

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apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: production
  namespace: argocd
  finalizers:
    - resources-finalizer.argocd.argoproj.io
spec:
  project: production
  source:
    repoURL: https://github.com/vfarcic/argocd-production.git
    targetRevision: HEAD
    path: helm
  destination:
    server: https://kubernetes.default.svc
    namespace: production
  syncPolicy:
    automated:
      selfHeal: true
      prune: true

This one is almost the same as the previous application definition. The major difference is that it references the helm directory of the vfarcic/argocd-production repository. That’s the directory with the Chart that has the applications defined in devops-paradox.yaml and devops-toolkit.yaml files. As a result, Argo CD will synchronize changes to vfarcic/argocd-production and the repos referenced in devops-paradox.yaml and devops-toolkit.yaml.

We need to change that address to be your fork of that repo, or, to be more precise, to use your GitHub organization. As usual, we’ll use a bit of sed ...

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