k8s1.14-helm模板变量

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变量

赋值变量

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[root@master101 sy]# cat mychart/templates/configmap.yaml 
apiVersion: v1
kind: ConfigMap
metadata:
  name: {{ .Release.Name }}-configmap
data:
  {{- $releaseName := .Release.Name -}}
  {{- with .Values.course }}
  release: {{ $releaseName }}
  k8s: {{ .k8s | upper | quote }}
  python: {{ .python | repeat 5 | quote }}
  {{- if eq .python "django" }}
  web: true
  {{- end }}
  {{- end }}
  courselist:
  {{- range $index, $course := .Values.courselist }}
  - {{ $index }}: {{ $course | title | quote }}
  {{- end }}
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with语句上面增加了一句{{- $releaseName := .Release.Name -}}，其中$releaseName就是后面的对象的一个引用变量，它的形式就是$name，赋值操作使用:=，这样with语句块内部的$releaseName变量仍然指向的是.Release.Name

变量在range循环使用，我们可以在循环中用变量来同时捕获索引的值

结果：

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[root@master101 sy]# helm install --dry-run --debug mychart/
[debug] Created tunnel using local port: '42101'

[debug] SERVER: "127.0.0.1:42101"

[debug] Original chart version: ""
[debug] CHART PATH: /root/sy/mychart

NAME:   needled-labradoodle
REVISION: 1
RELEASED: Fri Aug 23 14:08:08 2019
CHART: mychart-0.1.0
USER-SUPPLIED VALUES:
{}

COMPUTED VALUES:
course:
  k8s: devops
  python: django
courselist:
- k8s
- python
- go
- java
- php

HOOKS:
MANIFEST:

---
# Source: mychart/templates/configmap.yaml
apiVersion: v1
kind: ConfigMap
metadata:
  name: needled-labradoodle-configmap
data:
  release: needled-labradoodle
  k8s: "DEVOPS"
  python: "djangodjangodjangodjangodjango"
  web: true
  courselist:
  - 0: "K8s"
  - 1: "Python"
  - 2: "Go"
  - 3: "Java"
  - 4: "Php"
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