Using variables in templates so set the scope using - with

[Adam Daughterson]

Hello group,

I'm posed with an interesting problem that I've been bumping up against for a few hours now setting the scope using a  {{- with }} statement.

Given the following values.yaml snippet:

configmap:
  dev:
    resources:
      limits:
        cpu: 10m
        memory: 16Mi
      requests:
        cpu: 5m
        memory: 8Mi
  alpha:
    resources:
      limits:
        cpu: 30m
        memory: 32Mi
      requests:
        cpu: 5m
        memory: 16Mi

I'm trying to use something like the following to populate the resources block as so:

{{- $env := printf "%s" .Values.configmap.environment }}

# snip...
          resources:
            {{- with .Values.configmap }}.{{$env}}
              {{- toYaml . | nindent 12 }}
            {{- end}}
# snip...

...which renders to this:

       

          resources:.dev
            alpha:
              resources:
                limits:
                  cpu: 200m
                  memory: 256Mi
                requests:
                  cpu: 20m
                  memory: 32Mi
            dev:
              resources:
                limits:
                  cpu: 100m
                  memory: 128Mi
                requests:
                  cpu: 10m
                  memory: 16Mi

The desired rendered yaml should actually be (when --set configmap.environment=dev is passed to helm):

          resources:
                limits:
                  cpu: 100m
                  memory: 128Mi
                requests:
                  cpu: 10m
                  memory: 16Mi

Can someone offer any guidance on getting this kind of thing working?

Yours gratefully,

Adam D

[Adam Daughterson]

EDIT: the template snippet is actually this:

          {{- with .Values.configmap }}.{{$env}}

          resources:
            {{- toYaml .resources | nindent 12 }}
          {{- end}}

Thanks