Использование вложенных шаблонов

_helpers.tpl

# templates/_helpers.tpl
{{- define "my-chart.labels" }}
labels:
  app: {{ .Release.Name }}
  chart: {{ .Chart.Name }}-{{ .Chart.Version }}
  release: {{ .Release.Name }}
  heritage: {{ .Release.Service }}
{{- end }}

deployment.yaml

# templates/deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: {{ .Release.Name }}
  {{- include "my-chart.labels" . }}
spec:
  replicas: {{ .Values.deployment.replicas }}
  selector:
    matchLabels:
      app: {{ .Release.Name }}
  template:
    metadata:
      {{- include "my-chart.labels" . }}
    spec:
      containers:
        - name: {{ .Release.Name }}
          image: "{{ .Values.deployment.image.repository }}:{{ .Values.deployment.image.tag }}"
          ports:
            - containerPort: {{ .Values.deployment.containerPort }}