HelmチャートでRangeのループ中に.Files.Getを使う方法

.Files.Getを使ってファイルを読み込みつつValues.yamlに定義した値を渡す場合

ディレクトリ構造

.
├── Chart.yaml
├── charts
├── files
│   └── test.txt
├── templates
│   └── configmap.yaml
└── values.yaml

template/configmap.yaml

{{- $currentScope := . -}}
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: test-configmap
  namespace: {{ $.Values.namespace }}
data:
  test.txt: |
{{ tpl ($currentScope.Files.Get "files/test.txt") $currentScope |  indent 4 }}

files/test.txt

helloworld
helloworld
{{ .Values.namespace }}

helm templateコマンド実行結果

 yuta  yutanoAir-2  ~  vamdemic  helmfiles  charts  19  %  helm template -f values.yaml app .
WARNING: Kubernetes configuration file is group-readable. This is insecure. Location: /Users/yuta/.kube/config
WARNING: Kubernetes configuration file is world-readable. This is insecure. Location: /Users/yuta/.kube/config
---
# Source: charts/templates/configmap.yaml
apiVersion: v1
kind: ConfigMap
metadata:
  name: test-configmap
  namespace: testnamespace
data:
  test.txt: |
    helloworld
    helloworld
    testnamespace

.Files.Getを使ってファイルを読み込みつつValues.yamlに定義した値を渡しつつ、Rangeでループ中の値も渡す場合

• tplの第二引数にdictに変換したループ中の変数を与えてあげれば良い
• .Filesはループ中のスコープには存在しないため、$.Filesで呼び出す必要がある

ディレクトリ構造

.
├── Chart.yaml
├── charts
├── files
│   └── test.txt
├── templates
│   └── configmap.yaml
└── values.yaml

template/configmap.yaml

{{- range $name := .Values.configs }}
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: {{ printf "%s-config" $name }}
  namespace: {{ $.Values.namespace }}
data:
  test.txt: |
{{ tpl ($.Files.Get "files/test.txt") (dict "Values" $.Values "name" $name) | indent 4 }}
{{- end }}

files/test.txt

helloworld
helloworld
{{ .Values.namespace }}
{{ .name }}

values.yaml

namespace: testnamespace
configs:
  config1: test1.txt
  config2: test2.txt
  config3: test3.txt

helm templateコマンド実行結果

 yuta  yutanoAir-2  ~  vamdemic  helmfiles  charts  19  %  helm template -f values.yaml app . --debug
WARNING: Kubernetes configuration file is group-readable. This is insecure. Location: /Users/yuta/.kube/config
WARNING: Kubernetes configuration file is world-readable. This is insecure. Location: /Users/yuta/.kube/config
install.go:222: [debug] Original chart version: ""
install.go:239: [debug] CHART PATH: /Users/yuta/vamdemic/helmfiles/charts

---
# Source: charts/templates/configmap.yaml
apiVersion: v1
kind: ConfigMap
metadata:
  name: test1.txt-config
  namespace: testnamespace
data:
  test.txt: |
    helloworld
    helloworld
    testnamespace
    test1.txt
---
# Source: charts/templates/configmap.yaml
apiVersion: v1
kind: ConfigMap
metadata:
  name: test2.txt-config
  namespace: testnamespace
data:
  test.txt: |
    helloworld
    helloworld
    testnamespace
    test2.txt
---
# Source: charts/templates/configmap.yaml
apiVersion: v1
kind: ConfigMap
metadata:
  name: test3.txt-config
  namespace: testnamespace
data:
  test.txt: |
    helloworld
    helloworld
    testnamespace
    test3.txt