feat: Helm chart supports setting of arbitrary environment variables (#…

…444)

charts/heimdall/README.adoc

@@ -42,7 +42,7 @@ $ helm repo update
 
 == Installing the Chart
 
-This chart expects a https://dadrus.github.io/heimdall/dev/docs/configuration/reference/configuration_reference/[heimdall configuration file] with authentication, authorization and so on mechanisms, required for your particular setup. This file can be passed by using the `-f heimdall.yaml` flag during the installation.
+This chart supports setting of any environment variables for the deployment, e.g. to provide OTEL configuration. All environment variables must be configured under an `env` key. E.g. `helm install my-release --set env.MY_ENV=env-value dadrus/heimdall`
 
 If you need to override the name of the heimdall resources such as the deployment or services, the traditional `nameOverride` and `fullnameOverride` properties are supported.
 
@@ -390,4 +390,16 @@ a| `service.management.name`
 
 The name of the port exposed by the k8s Service created for heimdall's management endpoint.
 a| `management`
+
+a| `env`
+
+Environment variables, which should be made available to the heimdall deployment. E.g.
+
+```.yaml
+env:
+  OTEL_EXPORTER_OTLP_TRACES_PROTOCOL=grpc
+  OTEL_EXPORTER_OTLP_TRACES_ENDPOINT=http://tempo.tempo.svc.cluster.local:4317
+```
+
+a| `{}` (empty map)
 |===

charts/heimdall/templates/demo/configmap.yaml

@@ -25,6 +25,7 @@ metadata:
 data:
   heimdall.yaml: |
     log:
+      format: gelf
       level: info
 
     rules:

charts/heimdall/templates/heimdall/deployment.yaml

@@ -88,6 +88,13 @@ spec:
             - name: {{ include "heimdall.name" . }}-config-volume
               mountPath: /etc/heimdall
               readOnly: true
+          {{- if .Values.env }}
+          env:
+            {{- range $key, $val := .Values.env }}
+              - name: {{ $key }}
+                value: {{ $val }}
+            {{- end }}
+          {{- end }}
           livenessProbe:
             httpGet:
               path: /.well-known/health

charts/heimdall/values.yaml

@@ -119,6 +119,9 @@ service:
     # Service port name
     name: management
 
+# Configures arbitrary environment variables for the deployment
+env: {}
+
 # heimdall config defaults
 # DO NOT OVERRIDE the values here. Use heimdall config yaml file instead!
 # If you create your own values.yaml file, copy the below contents to it as well.