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Var substitution opt-in 

Signed-off-by: Oliver Bähler <oliverbaehler@hotmail.com>
This commit is contained in:
Oliver Bähler 2021-07-07 14:24:39 +02:00
parent 5376558311
commit 69f9ebd1e7
1 changed files with 14 additions and 0 deletions
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docs/spec/v1beta1/kustomization.md
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@ -803,6 +803,20 @@ labeling or annotating them with:
kustomize.toolkit.fluxcd.io/substitute: disabled
```
Substitution needs to be defined opt-in. If not at least a single variable or resource to substitute from is defined, no var substitution is performed. So even expressions which should evaluate to a default value won't be evaluated. To enable var substitution, just set at least one variable which will enable var substitution for the Kustomization, if you don't have any other variables on the Kustomization. For example:
```
apiVersion: kustomize.toolkit.fluxcd.io/v1beta1
kind: Kustomization
metadata:
name: apps
spec:
...
postBuild:
substitute:
enabled: "true"
```
You can replicate the controller post-build substitutions locally using
[kustomize](https://github.com/kubernetes-sigs/kustomize)
and Drone's [envsubst](https://github.com/drone/envsubst):