pass array in Helm values property

Question

I would like to pass array as property in yaml (values file) in Helm. What I tried:

Attempt.
```
elasticsearch:
  uri: "[\"127.0.0.1:9200\",\"127.0.0.2:9200\"]"
```
Error:

ReadString: expects " or n, but found [, error found in #10 byte of ...|RCH_URL":["127.0.0.1|..., bigger context ...|{"apiVersion":"v1","data":{"ELASTIC_SEARCH_URL": ["127.0.0.1:9200","127.0.0.2:9200"],"LOGS_ENV_PREFI|...
Attempt. According to official helm site how to pass array
```
elasticsearch:
  --set uri={127.0.0.1:9200,127.0.0.2:9200}
```
With error:

error converting YAML to JSON: yaml: line 15: mapping values are not allowed in this context

Attempt.

 elasticsearch:
   uri: 
   - 127.0.0.1:9200
   - 127.0.0.2:9200

Failed with the same exception as 1.

EDIT: Actually in my case the helm values were not used in YAML file then, so I needed another format and finally solution was to pass uri as string with single quote:

 elasticsearch:
   uri: '["127.0.0.1:9200","127.0.0.2:9200"]'

Nevertheless @Marcin answer was correct.

Helm Rendering of values from values.yaml to config.yaml : values.yaml : sites: - dataprovider: abcd - dataprovider: xyzx config.yaml : sites: {{ toYaml .Values.sites | indent 10 }} — Sandeep Jain, Jan 15 '21 at 07:10

score 23 · Accepted Answer · answered Sep 20 '19 at 14:31

23

You pass an array of values by using either the old fashioned json way:

elasticsearch:
  uri: ["127.0.0.1:9200", "127.0.0.2:9200"]

or the way introduced by yaml:

elasticsearch:
  uri: 
  - 127.0.0.1:9200
  - 127.0.0.2:9200

You can then access the values in Helm templates using range:

Uris:{{- range .Values.elasticsearch.uri }}
{{.}}{{- end }}

resolves to:

Uris:
127.0.0.1:9200
127.0.0.2:9200

answered Sep 20 '19 at 14:31

Marcin Król

1,555
2
16
31

2

just a note: what you define as the `old fashioned json way` is also yaml, just in one line – scones Feb 25 '22 at 09:50
Fwiw, I needed to add a `-` to make a valid list in helm. ```{{- range .Values.elasticsearch.uri }} - {{.}} {{- end }}``` – technogeek1995 Jul 18 '23 at 19:07

score 22 · Answer 2 · edited Jul 29 '21 at 21:23

22

Helm Rendering of values from values.yaml to config.yaml :

values.yaml:

sites:
  - dataprovider: abcd
  - dataprovider: xyzx

config.yaml:

sites:
  {{ toYaml .Values.sites | indent 10 }}

edited Jul 29 '21 at 21:23

EugZol

6,476
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41

answered Feb 12 '21 at 11:25

Sandeep Jain

1,019
9
13

2

This worked for me after a small change -- the first line of output was indented 12 spaces instead of 10; I had to fully left justify the second line above to get the expected output. – Donnie C Oct 04 '21 at 19:59
7

One could also write it on one line as `sites: {{ toYaml .Values.sites | nindent 10 }}`. `nindent` adds a leading newline. – tlwhitec Oct 05 '21 at 11:02
Yep we can do these changes as suggested on the requirement of the output. – Sandeep Jain Jan 21 '22 at 16:39

pass array in Helm values property

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