K
Q

Kubernetes - Set Release.Namespace to dependencies values on values.yaml

12/31/2019

I know there are many questions around this but I didn't find any with a real answer.

My helm chart have dependencies from another helm charts and I need to override their values with my .Release.Name and .Release.Namespace.

My requeriments.yaml

dependencies:
- name: keycloak
  alias: keycloak-config
  repository: https://my-repository.com/
  version: 1.0.0
- name: kong
  alias: kong-config
  repository: https://my-repository.com/
  version: 1.0.0

On my values.yaml

kong-config:
  websso:
    service:
      fullnameOverride: "my-helm._RELEASE_NAMESPACE_.svc.cluster.local"
      ckngOauth2Opts: "--data config.post_logout_redirect_uri=/_RELEASE_NAME_
                       --data config.logout_path=/_RELEASE_NAME_/logout"

I basically need to use {{ .Release.Name }} where I have _RELEASE_NAME_ and {{ .Release.Namespace }} where I have _RELEASE_NAMESPACE_.

I already tried:

  • {{ .Release.Name }} and {{ .Release.Namespace }}
  • $RELEASE_NAME and $RELEASE_NAMESPACE
  • ${RELEASE_NAME} and ${RELEASE_NAMESPACE}

but nothing works.

Note I really need to access those values at values.yaml. I don't have access to my dependencies code to change and set that values on that.

How can I solve this?

-- Ninita
keycloak
kong
kubernetes
kubernetes-helm

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2 Answers

2/10/2020

I solved this executing one additional command outside of my helm chart. As I have a Makefile file for my project build process where I can run some scripts for the multiple stages of my build. And so I added this command to the deploy stage:

sed -i "s/_RELEASE_NAMESPACE_/$(NAMESPACE)/g" $(MODULE_PATH)/chart/values.yaml

This works for a build workflow in some tool. But when I want to install manually my helm chart somewhere, it can't be done and I need to change manually that value with the server value.

-- Ninita
Source: StackOverflow
12/31/2019

While it does not appear that helm, itself, can do that, helmfile can via either its integration with kustomize or with its prepare hook. I'll show the prepare hook because it's much shorter

releases:
- name: kong-config
  chart: whatever/kong
  version: 1.0.0
  values:
  - ./generated-values.yaml
  hooks:
  - events: ['prepare']
    command: bash
    args:
    - -c
    - |
      printf 'websso:\n  service:\n    fullnameOverride: my-helm.{{`{{ .Release.Namespace }}`}}.svc.cluster.local\n' > generated-values.yaml
-- mdaniel
Source: StackOverflow