CODEWITHSUNDEEP
kubernetes-helm
maks
maks

Reputation: 6006

Helm create template for template

Is it possible to create a helm template for a template file inside templates/ folder? My use case is following: there are several kubernetes deployment files which differs only in deployment name and docker image that is pulled from a repo(e.g. deployment for service1, service2 etc). I want to create one chart to deploy all that services. Currently there are a lot of copy-paste in my deployment templates. I want to have some kind of a template for that templates. Also all that deployment templates will have different Values.yaml on different environments(e.g. service1 and service2 will have values-prod.yaml on prod env and values-stage.yaml on staging env)

If not possible, what are the alternative solutions? Thanks

Upvotes: 1

Views: 1109

Answers (1)

maks
maks

Reputation: 6006

For those who are interseted in a solution: as proposed by David Maze in the comments to my question I should use somehing similar to {{ range .Values.resourceNames }} in the template file(e.g. deployment.yaml) and divide those resources with --- on the beginning of a loop(kubernetes allows to have several resources defined in a single file separated by ---), where .Values.resourceNames is just an example. So having that deployment.yaml template could look like following:

{{- range .Values.resourceNames }}
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: {{ .name }}-deployment
  labels:
    app: {{ .name }}
spec:
  replicas: {{ .replicaCount }}
  selector:
    ...
{{- end }}

where values.yaml file looks like folloiwng:

resourceNames:
  - name: service1
    replicaCount: 2
  - name: service2
    replicaCount: 1

Upvotes: 2

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