Inject values into charts from kubectl command statement result at runtime

[komal-SkyNET]

I'm trying to inject values into my chart by obtaining values from the kubernetes cluster by executing certain kubectl commands. For instance, I need to inject the a value into my charts from kubernetes node labels.

Output of helm version:
Client: &version.Version{SemVer:"v2.7.2" , GitTreeState:"clean"}
Server: &version.Version{SemVer:"v2.7.2", GitTreeState:"clean"}

Output of kubectl version:
Client Version: version.Info{Major:"1", Minor:"9", GitVersion:"v1.9.6", GitTreeState:"clean", BuildDate:"2018-03-21T15:21:50Z", GoVersion:"go1.9.3", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"8", GitVersion:"v1.8.3+coreos.0", GitTreeState:"clean", BuildDate:"2017-11-13T10:18:37Z", GoVersion:"go1.8.3", Compiler:"gc", Platform:"linux/amd64"}

Cloud Provider/Platform (AKS, GKE, Minikube etc.): VMware

[komal-SkyNET]

Just looking to see if there's a feature to do this from values file.

eg:

data:
environment: {{ $(kubectl get nodes --show-labels ) }}

I understand there's formatting issues and data type mismatch here, but just wondering if there's a way to execute and get output from command into values file. I've noticed --set option being used for stuff like this.

[bacongobbler]

This seems like a good use case to add to the downward API. It's not possible to grab node labels, but this was requested upstream. See kubernetes/kubernetes#40610

For now, you'll have to use --set and manually inject your labels into the chart. There's no way currently to programmatically grab the node's labels on-the-fly.

[bacongobbler]

Closing due to inactivity. Please open a new ticket against Helm 3 if this issue persists. Thanks!