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fix(appset): Always remove ownerReferences when appset policy doesn't allow app's deletion (#12172) #16506

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merged 2 commits into from
Dec 8, 2023
Merged

fix(appset): Always remove ownerReferences when appset policy doesn't allow app's deletion (#12172) #16506

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ae30ad6
fix(appset): remove unnecessary condition
mikutas Dec 1, 2023
82b13e3
docs: update explanation about policy
mikutas Dec 2, 2023
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18 changes: 8 additions & 10 deletions applicationset/controllers/applicationset_controller.go
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Original file line number Diff line number Diff line change
Expand Up @@ -108,16 +108,14 @@ func (r *ApplicationSetReconciler) Reconcile(ctx context.Context, req ctrl.Reque

// Do not attempt to further reconcile the ApplicationSet if it is being deleted.
if applicationSetInfo.ObjectMeta.DeletionTimestamp != nil {
if controllerutil.ContainsFinalizer(&applicationSetInfo, argov1alpha1.ResourcesFinalizerName) {
deleteAllowed := utils.DefaultPolicy(applicationSetInfo.Spec.SyncPolicy, r.Policy, r.EnablePolicyOverride).AllowDelete()
if !deleteAllowed {
if err := r.removeOwnerReferencesOnDeleteAppSet(ctx, applicationSetInfo); err != nil {
return ctrl.Result{}, err
}
controllerutil.RemoveFinalizer(&applicationSetInfo, argov1alpha1.ResourcesFinalizerName)
if err := r.Update(ctx, &applicationSetInfo); err != nil {
return ctrl.Result{}, err
}
deleteAllowed := utils.DefaultPolicy(applicationSetInfo.Spec.SyncPolicy, r.Policy, r.EnablePolicyOverride).AllowDelete()
if !deleteAllowed {
if err := r.removeOwnerReferencesOnDeleteAppSet(ctx, applicationSetInfo); err != nil {
return ctrl.Result{}, err
}
controllerutil.RemoveFinalizer(&applicationSetInfo, argov1alpha1.ResourcesFinalizerName)
if err := r.Update(ctx, &applicationSetInfo); err != nil {
return ctrl.Result{}, err
}
}
return ctrl.Result{}, nil
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6 changes: 2 additions & 4 deletions docs/operator-manual/applicationset/Controlling-Resource-Modification.md
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Expand Up @@ -32,15 +32,13 @@ spec:

```

- Policy `create-only`: Prevents ApplicationSet controller from modifying or deleting Applications.
- Policy `create-update`: Prevents ApplicationSet controller from deleting Applications. Update is allowed.
- Policy `create-only`: Prevents ApplicationSet controller from modifying or deleting Applications. Prevents Application controller from deleting Applications according to [ownerReferences](https://kubernetes.io/docs/concepts/overview/working-with-objects/owners-dependents/).
- Policy `create-update`: Prevents ApplicationSet controller from deleting Applications. Update is allowed. Prevents Application controller from deleting Applications according to [ownerReferences](https://kubernetes.io/docs/concepts/overview/working-with-objects/owners-dependents/).
- Policy `create-delete`: Prevents ApplicationSet controller from modifying Applications. Delete is allowed.
- Policy `sync`: Update and Delete are allowed.

If the controller parameter `--policy` is set, it takes precedence on the field `applicationsSync`. It is possible to allow per ApplicationSet sync policy by setting variable `ARGOCD_APPLICATIONSET_CONTROLLER_ENABLE_POLICY_OVERRIDE` to argocd-cmd-params-cm `applicationsetcontroller.enable.policy.override` or directly with controller parameter `--enable-policy-override` (default to `false`).

This does not prevent deletion of Applications if the ApplicationSet is deleted

### Controller parameter

To allow the ApplicationSet controller to *create* `Application` resources, but prevent any further modification, such as deletion, or modification of Application fields, add this parameter in the ApplicationSet controller:
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