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docs: Added example of using build env vars in your Kustomized App #16025

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Oct 19, 2023
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docs: Added example of using build env vars in your Kustomized App #16025

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28 changes: 28 additions & 0 deletions docs/user-guide/kustomize.md
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Expand Up @@ -143,6 +143,34 @@ argocd app set <appName> --kustomize-version v3.5.4

Kustomize apps have access to the [standard build environment](build-environment.md) which can be used in combination with a [config managment plugin](../operator-manual/config-management-plugins.md) to alter the rendered manifests.

You can use these build environment variables in your Argo CD Application manifests. You can enable this by setting `.spec.source.kustomize.commonAnnotationsEnvsubst` to `true` in your Application manifest.

For example, the following Application manifest will set the `app-source` annotation to the name of the Application:

```yaml
apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
name: guestbook-app
namespace: argocd
spec:
project: default
destination:
namespace: demo
server: https://kubernetes.default.svc
source:
path: kustomize-guestbook
repoURL: https://github.com/argoproj/argocd-example-apps
targetRevision: HEAD
kustomize:
commonAnnotationsEnvsubst: true
commonAnnotations:
app-source: ${ARGOCD_APP_NAME}
syncPolicy:
syncOptions:
- CreateNamespace=true
```

## Kustomizing Helm charts

It's possible to [render Helm charts with Kustomize](https://github.com/kubernetes-sigs/kustomize/blob/master/examples/chart.md).
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