8000 Incorrect handling of empty/null variables · Issue #1217 · kluctl/kluctl · GitHub
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Incorrect handling of empty/null variables #1217

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funbiscuit opened this issue Nov 14, 2024 · 1 comment
Open

Incorrect handling of empty/null variables #1217

funbiscuit opened this issue Nov 14, 2024 · 1 comment

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@funbiscuit
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Operating system

Manjaro with 6.6.19 kernel

Kluctl Version

2.25.1

Kubernetes Version

v1.30.4+k3s1

kubectl Version

v1.30.3

Bug description

When using empty or null variables kluctl incorretly substitutes them in templates

Steps to reproduce

.kluctl.yaml

discriminator: app-{{ target.name }}

targets:
  - name: local

deployment.yaml

deployments:
  - path: app
    vars:
      - file: vars.yaml

vars.yaml

testVar1:
testVar2: ""
testVar3: null

app/namespace.yaml

apiVersion: v1
kind: Namespace
metadata:
  labels:
    label1: {{ testVar1 }}
    label2: {{ testVar2 }}
    label3: {{ testVar3 }}
  name: app

If we render this project with kluctl render then rendered namespace will have following yaml:

apiVersion: v1
kind: Namespace
metadata:
  labels:
    label1: None
    label2: 
    label3: None
  name: app

So every variable is rendered wrong. testVar1 and testVar3 from null value became "None" string and testVar2 from "" empty string became null value,

Relevant log output

No response
@funbiscuit funbiscuit changed the title Incorrect handling of empty/null vartiables Incorrect handling of empty/null variables Nov 14, 2024
@ammgws
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ammgws commented Jan 18, 2025

I was set to use kluctl until seeing this. I wonder if it's reproducible in other projects using jinja2 like ansible...

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@funbiscuit @ammgws
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