K
Q

Kubernetes/Helm: any examples with ConfigMap and "binaryData:"?

July 14, 2018

With Kubernetes 1.10.* we can use 

binaryData:
with 
ConfigMap
and I am trying to combine it with 
Helm
:

apiVersion: v1

kind: ConfigMap

metadata:

  name: some_config_map

data:

  text_data: |-
    {{ .Files.Get "truststores/simple_text_file.txt" }}

binaryData:
  trustore.jks: |-
    {{ .Files.Get "truststores/trustore.jks" | b64enc }}

I am not sure about the last line - regardless of syntax:

 {{ "truststores/trustore.jks" | b64enc }}
 {{ "truststores/trustore.jks" }}

the 

trustore.jks
is empty when I deploy it.

So how can I use 

binaryData:
?

-- pb100
kubernetes
kubernetes-helm

Similar Questions

How to find the url of a service in kubernetes?
Retrieve the full name of a service in Kubernetes
watch.Interface vs. cache.NewInformer vs. cache.NewSharedIndexInformer?
kubelet does not have ClusterDNS IP configured in Microk8s
Difference between Kubernetes prometheues operator vs helm chart

3 Answers

July 16, 2018

Your syntax looks fine and everything should work properly. Files in the field 

binaryData
must be encoded with base64, so, 
{{ .Files.Get "truststores/trustore.jks" | b64enc }}
is correct.

Try to apply the configuration with debug key and investigate what went wrong, possibly there is no such file or there are some problems with encoding.

-- Artem Golenyaev
Source: StackOverflow
October 26, 2020

This might be too late, but maybe it will help someone.

You need to add indentation to your base64 encoded string.

{{ .Files.Get "truststores/trustore.jks" | b64enc | indent 4}}

This is also applies to your text file:

{{ .Files.Get "truststores/simple_text_file.txt" | indent 4}}

This should add 4 spaces to each line from the file

-- Stanciu Marian Madalin
Source: StackOverflow
August 23, 2023

Syntax is good but as defined here https://helm.sh/docs/chart_template_guide/accessing_files .Files don't load file from anywhere. So "truststores/trustore.jks" if truststores is not part of your chart folder

-- jandry
Source: StackOverflow