feat(helm): allow A2A base URL to be set when installing

helm/kagent/templates/_helpers.tpl

@@ -122,3 +122,14 @@ Validate controller configuration
 {{- fail "ERROR: controller.replicas cannot be greater than 1 when database.type is 'sqlite' as the SQLite database is local to the pod. Please either set controller.replicas to 1 or change database.type to 'postgres'." }}
 {{- end -}}
 {{- end -}}
+
+{{/*
+A2A Base URL - computes the default URL based on the controller service name if not explicitly set
+*/}}
+{{- define "kagent.a2aBaseUrl" -}}
+{{- if .Values.controller.a2aBaseUrl -}}
+{{- .Values.controller.a2aBaseUrl -}}
+{{- else -}}
+{{- printf "http://%s-controller.%s.svc.cluster.local:%d" (include "kagent.fullname" .) (include "kagent.namespace" .) (.Values.controller.service.ports.port | int) -}}
+{{- end -}}
+{{- end -}}

helm/kagent/templates/controller-configmap.yaml

@@ -6,6 +6,7 @@ metadata:
   labels:
     {{- include "kagent.controller.labels" . | nindent 4 }}
 data:
+  A2A_BASE_URL: {{ include "kagent.a2aBaseUrl" . | quote }}
   DATABASE_TYPE: {{ .Values.database.type | quote }}
   DEFAULT_MODEL_CONFIG_NAME: {{ include "kagent.defaultModelConfigName" . | quote }}
   IMAGE_PULL_POLICY: {{ .Values.controller.agentImage.pullPolicy | default .Values.imagePullPolicy | quote }}

helm/kagent/tests/controller-deployment_test.yaml

@@ -89,6 +89,23 @@ tests:
           path: spec.template.spec.containers[0].ports[0].containerPort
           value: 8083
 
+  - it: should set A2A_BASE_URL with computed default value
+    template: controller-configmap.yaml
+    asserts:
+      - equal:
+          path: data.A2A_BASE_URL
+          value: "http://RELEASE-NAME-controller.NAMESPACE.svc.cluster.local:8083"
+
+  - it: should set A2A_BASE_URL with custom value when explicitly set
+    template: controller-configmap.yaml
+    set:
+      controller:
+        a2aBaseUrl: "https://kagent.example.com"
+    asserts:
+      - equal:
+          path: data.A2A_BASE_URL
+          value: "https://kagent.example.com"
+
   - it: should use custom loglevel when set
     template: controller-configmap.yaml
     set:

helm/kagent/values.yaml

@@ -64,6 +64,9 @@ database:
 controller:
   replicas: 1
   loglevel: "info"
+  # -- The base URL of the A2A Server endpoint, as advertised to clients.
+  # @default -- `http://<fullname>-controller.<namespace>.svc.cluster.local:<port>`
+  a2aBaseUrl: ""
   agentImage:
     registry: ""
     repository: kagent-dev/kagent/app