序列输出在使用地图对象时添加换行符

Question

我想在我的 values.yaml 文件中使用定义的范围创建多个服务定义。

values.yaml

services:
  type: ClusterIP
  ports:
    - name: https
      port: 443
      protocol: TCP
      targetPort: 8443
    - name: http
      port: 80
      protocol: TCP
      targetPort: 8080

创建多个定义工作正常，但端口部分在开始序列时总是有一个换行符。

模板services.yaml

{{- $top := . -}}
{{- range $key, $val := .Values.services.ports -}}
apiVersion: v1
kind: Service
metadata:
  name: {{ printf "%s-%s" ($.Values.fullnameOverride) ($val.name) }}
  labels:
    app: {{ printf "%s-%s" ($.Values.fullnameOverride) ($val.name) }}
spec:
  type: {{ $.Values.services.type }}
  ports:
  - {{ toYaml $val | trim | nindent 4 }}
  selector:
    app: {{ $.Values.fullnameOverride }}
---
{{- end }}

但是当我执行上面的模板时，我得到以下输出：

---
# Source: arichnettools/templates/services.yaml
apiVersion: v1
kind: Service
metadata:
  name: arichnettools-https
  labels:
    app: arichnettools-https
spec:
  type: ClusterIP
  ports:
  -
    name: https
    port: 443
    protocol: TCP
    targetPort: 8443
  selector:
    app: arichnettools
---
# Source: arichnettools/templates/services.yaml
apiVersion: v1
kind: Service
metadata:
  name: arichnettools-http
  labels:
    app: arichnettools-http
spec:
  type: ClusterIP
  ports:
  -
    name: http
    port: 80
    protocol: TCP
    targetPort: 8080
  selector:
    app: arichnettools
---

我不知道如何在 ports: 之后去掉换行符我不确定这是否会在部署期间给我一个错误，但这让我发疯。我也尝试过 indent 但到目前为止运气不好。

Answer 1

ports: 之后的这一新行不应导致任何错误，但您只需对模板进行一次修改即可轻松摆脱它。

而不是：

ports:
  - {{ toYaml $val | trim | nindent 4 }}

尝试使用：

  ports:
  - {{ toYaml $val | indent 4 | trim }}

我们可以看到修改后效果如预期：

$ cat templates/services.yaml
{{- $top := . -}}
{{- range $key, $val := .Values.services.ports -}}
apiVersion: v1
kind: Service
metadata:
  name: {{ printf "%s-%s" ($.Values.fullnameOverride) ($val.name) }}
  labels:
    app: {{ printf "%s-%s" ($.Values.fullnameOverride) ($val.name) }}
spec:
  type: {{ $.Values.services.type }}
  ports:
  - {{ toYaml $val | indent 4 | trim }}
  selector:
    app: {{ $.Values.fullnameOverride }}
---
{{- end }}

$ helm template test .
---
# Source: mychart/templates/services.yaml
apiVersion: v1
kind: Service
metadata:
  name: svc-test-https
  labels:
    app: svc-test-https
spec:
  type: ClusterIP
  ports:
  - name: https
    port: 443
    protocol: TCP
    targetPort: 8443
  selector:
    app: svc-test
---
# Source: mychart/templates/services.yaml
apiVersion: v1
kind: Service
metadata:
  name: svc-test-http
  labels:
    app: svc-test-http
spec:
  type: ClusterIP
  ports:
  - name: http
    port: 80
    protocol: TCP
    targetPort: 8080
  selector:
    app: svc-test

序列输出在使用地图对象时添加换行符

Output to a sequence add a newline when working with map objects

range

sequence

kubernetes

kubernetes-helm