I am using the Kubernetes Helm requirements.yaml file for dependencies addition. Based on the values.yaml condition, it will create the dependencies pods.
Here I want to execute required dependencies when apache.enabled == false
values.yaml
external_apache:
enabled: false
dependencies:
- name:
version:
repository:
condition: external_apache.enabled
How do I add a false condition?
I have tried the below condition, but it's not working:
condition: external_apache.enabled == false
Helm version v2.2.2
worked, while v2.10.0
didn't.
What version of Helm are you using?
There was a similar issue in the Kubernetes repository on GitHub:
Unable to use condition in 'requirements.yaml' #2111
The solution was to upgrade Helm to v2.2.0+. In that version, condition support was added.
Helm 2 to Helm 3 upgrade note:
Chart apiVersion bumped to "v2" for following specification changes:
- Dynamically linked chart dependencies moved to Chart.yaml (requirements.yaml removed and requirements --> dependencies)
- Library charts (helper/common charts) can now be added as dynamically linked chart dependencies
- Charts have a type metadata field to define the chart to be of an application or library chart. It is application by default which means it is renderable and installable
- Helm 2 charts (apiVersion=v1) are still installable
In the Helm documentation or repository, there is an explanation of how the condition works: (I've added some comments to make reading easier)
Condition - The condition field holds one or more YAML paths (delimited by commas).
Tags - The tags field is a YAML list of labels to associate with this chart.
# parentchart/requirements.yaml
dependencies:
- name: subchart1
repository: http://localhost:10191
version: 0.1.0
condition: subchart1.enabled, global.subchart1.enabled
tags:
- front-end #(chart should be disabled because the tags.front-end is “false” in values.yaml file , but ...)
- subchart1 #(subchart1.enabled condition path is present in values.yaml file and it has "true" value...)
#(this condition, so it overrides tag front-end and this chart will be enabled)
- name: subchart2
repository: http://localhost:10191
version: 0.1.0
condition: subchart2.enabled,global.subchart2.enabled
#(as soon as no one from these paths is exists in values.yaml this condition has ho effect)
tags:
- back-end #(chart should be enabled because the tags.back-end is “true” in values.yaml file)
- subchart2 #(and there is no condition path found in values.yaml to override it)
If this condition path exists in the top parent’s values
and resolves to a boolean value, the chart will be enabled or disabled based on that boolean value.
Only the first valid path found in the list is evaluated and if no paths exist then the condition has no effect.
In the top parent’s values, all charts with tags can be enabled or disabled by specifying the tag and a boolean value.
# parentchart/values.yaml
subchart1:
enabled: true #(this could be found from requirements as subchart1.enabled and override tags in this case)
tags:
front-end: false #(this disables charts with tag front-end)
back-end: true #(this enables charts with tag back-end)
The logic and sequence of conditions and tags are described in Tags and Condition Resolution:
You can also set tags and conditions in the command line:
helm install --set tags.front-end=true --set subchart2.enabled=false
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