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

Question

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: ?

so what is answer? can you accept answer or post the answer?!? — uberrebu, Feb 03 '21 at 17:19

Artem Golenyaev · Answer 1 · 2018-07-16T15:21:22.623

17

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.

edited Jul 16 '18 at 15:21

answered Jul 16 '18 at 10:24

Artem Golenyaev

2,568
12
20

Shouldn't it use `.Files.GetBytes`? – Jan Hudec Sep 06 '18 at 08:44
1

No `.Files.GetBytes` should not be used. It even throws an error. The Code from the Question is right, and works great for my k8s installation. – kirrmann Oct 15 '18 at 14:31
@kirrmann Then what is a typical use-case for `.Files.GetBytes`? – turbolocust Jul 15 '22 at 06:06

Stanciu Marian Madalin · Answer 2 · 2020-10-27T12:59:04.587

9

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

edited Oct 27 '20 at 12:59

answered Oct 26 '20 at 20:38

Stanciu Marian Madalin

101
2
6

score 0 · Answer 3 · answered Aug 23 '23 at 08:46

0

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

answered Aug 23 '23 at 08:46

jandry

170
2
7

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

3 Answers3