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[Helm Chart] Tìm hiểu – (gạch giữa), _ (gạch dưới), dấu chấm “.” trong helm chart

Posted on September 23, 2021September 23, 2021 By nim No Comments on [Helm Chart] Tìm hiểu – (gạch giữa), _ (gạch dưới), dấu chấm “.” trong helm chart

https://helm.sh/docs/chart_template_guide/named_templates/

Chúng ta thắc mắc khi nhìn thấy các dấu - (gạch giữa)

apiVersion: v1
kind: Service
metadata:
  name: {{ include "fullname-override.fullname" . }}
  ## include trước đó không có dấu (-)
  labels:
    {{ include "fullname-override.labels" . | nindent 4 }}
spec:
  type: {{ .Values.service.type }}
  ports:
    - port: {{ .Values.service.port }}
      targetPort: http
      protocol: TCP
      name: http
  selector:
    {{- include "fullname-override.selectorLabels" . | nindent 4 }}

file lại bắt đầu bằng dấu _ (gạch dưới)

dấu chấm “.” ở cuối nghĩ là gì

Về dấu chậm khá là phong phú

Link này giải thích khá chi tiết
https://stackoverflow.com/questions/62472224/what-is-and-what-use-cases-have-the-dot-in-helm-charts

trường hợp này người ta gọi là {{/* Pass . as the template parameter */}}

Chúng ta cần tìm hiểu function include

https://helm.sh/docs/howto/charts_tips_and_tricks/#using-the-include-function

Helm has a special include function:

{{ include "toYaml" $value | indent 2 }}

The above includes a template called toYaml, passes it $value, and then passes the output of that template to the indent function.

Helm Chart, Kubernetes & Container

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