CODEWITHSUNDEEP
jsonkubernetesyamlkubernetes-helm
Gaurav Agnihotri
Gaurav Agnihotri

Reputation: 173

How to read value from yaml file which are in dictionary and need to use in helm

This is my string in values.yaml: selectorLabels: { app.kubernetes.io/name: tinyurl }

Yaml file looks like below:

name: test-dj-service
environment: prod
namespace: test-service
labels: { app.kubernetes.io/name: test-dj-service, environment: prod }
replicaCount: 1
selectorLabels: { app.kubernetes.io/name: tinyurl } <---

I need to use tinyurl in the below code under values.

Note:- tinyurl is variable, it will keep changing with other names.


{‌{ - if .Values.affinity.podAntiAffinity.preferred == true }}
        podAntiAffinity:
          preferredDuringSchedulingIgnoredDuringExecution:
          - weight: 100
            podAffinityTerm:
              labelSelector:
                 matchExpressions:
                 - key: app.kubernetes.io/name
                   operator: In
                   values: {‌{ ---------- }} # need to pull the selectorLabels values here.
              topologyKey: "kubernetes.io/hostname"
{‌{- end }}

So how I can pull this variable into values.

Upvotes: 0

Views: 1059

Answers (2)

helmbert
helmbert

Reputation: 37994

In addition to @ShashankV's answer, you should also be able to construct your label selector using a range expression (in case you want to support arbitrary label selectors, with multiple labels that are read from your Values file):

labelSelector:
  matchExpressions:
  {{- range $key, $value := .Values.selectorLabels }}
  - key: {{ $key | quote }}
    operator: In
    values: {‌{ $value | quote }}
  {{- end }}

Upvotes: 1

Shashank V
Shashank V

Reputation: 11193

You can use the index function

{{ index .Values.selectorLabels "app.kubernetes.io/name" }}

Upvotes: 0

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