I am working on a problem to implement a helm chart with customize configMap and trying to populate the configMap based on the environment mode.
Values.yaml
externalIPService:
ip: 1.1.1.1
port: 80
emsConfig: "receivers:
otlp:
protocols:
http:
processors:
batch:
exporters:
otlp/ems:
endpoint: {{ .Values.externalIPService.ip }}:{{ .Values.externalIPService.port }}
service:
pipelines:
traces:
receivers: [otlp]
processors: [batch]
exporters: [otlp/ems]
metrics:
receivers: [otlp]
processors: [batch]
exporters: [otlp/ems]
logs:
receivers: [otlp]
processors: [batch]
exporters: [otlp/ems]
"
configMap.yaml
apiVersion: v1
kind: ConfigMap
metadata:
name: simple-demo
data:
message: "{{ tpl .Values.emsConfig .}}"
The helm template output is a plain string and not a yaml content. I have tried toYaml as well but it did not help either. Could someone please help to find a way to do nested rendering and to be able to use the final output in the confiMap
apiVersion: v1
kind: ConfigMap
metadata:
name: simple-demo
data:
message: "receivers: otlp: protocols: http: processors: batch: exporters: otlp/ems: endpoint: {{ .Values.externalIPService.ip }}:{{ .Values.externalIPService.port }} service: pipelines: traces: receivers: [otlp] processors: [batch] exporters: [otlp/ems] metrics: receivers: [otlp] processors: [batch] exporters: [otlp/ems] logs: receivers: [otlp] processors: [batch] exporters: [otlp/ems] "
CodePudding user response:
in this situation, you need to use _halpers.tpl
file.
first, add this to the _halpers.tpl
file:
{{- define "appname.emsConfig" -}}
receivers:
otlp:
protocols:
http:
processors:
batch:
exporters:
otlp/ems:
endpoint: {{ .Values.externalIPService.ip }}:{{ .Values.externalIPService.port }}
service:
pipelines:
traces:
receivers: [otlp]
processors: [batch]
exporters: [otlp/ems]
metrics:
receivers: [otlp]
processors: [batch]
exporters: [otlp/ems]
logs:
receivers: [otlp]
processors: [batch]
exporters: [otlp/ems]
{{- end }}
the values.yaml
file will look like this:
externalIPService:
ip: 1.1.1.1
port: 80
and the configMap.yaml
file, will need to look like this:
apiVersion: v1
kind: ConfigMap
metadata:
name: simple-demo
data:
message: |-
{{ include "appname.emsConfig" . | nindent 4}}