add support for kafka endpoint configuration

charts/rasa-x/templates/rasa-config-files-configmap.yaml

@@ -48,6 +48,10 @@ data:
       {{- end }}
       {{- end }}
     {{- end }}
+    {{- if $.Values.kafka.enabled }}
+    event_broker:
+      {{- include  "kafka.endpointConfiugration" $ | nindent 6 }}
+    {{- end }}
     action_endpoint:
       url: {{ if .Values.app.existingUrl }}"{{ .Values.app.existingUrl }}"{{ else }}"{{ .Values.app.scheme }}://{{ include "rasa-x.fullname" . }}-app.{{ .Release.Namespace }}.svc:{{ template "rasa-x.custom-actions.port" . }}{{ .Values.app.endpoints.actionEndpointUrl }}"{{ end }}
       token:  ""

charts/rasa-x/values.yaml

@@ -742,6 +742,45 @@ rabbitmq:
   #   fsGroup: 1001
   #   runAsUser: 1001
 
+# Kafka specific settings
+kafka:
+  # Enabled should be `true` if a separate kafka instance is used as the event broker
+  # Note that this does NOT install kafka, it only configures endpoint settingsfor it
+  enabled: false
+  endpointConfiguration:
+    # see https://rasa.com/docs/rasa/event-brokers#kafka-event-broker
+    # kafka topics to subscribe to
+    topic: rasa_core_events
+    # kafka host
+    url: null
+    # whether messages are partitioned by sender_id or not
+    partition_by_sender: False
+    # whether intent IDs are converted from integers to strings
+    convert_intent_id_to_string: False
+    # A name for this client. 
+    client_id: null
+    # security protocol, one of SASL_PLAINTEXT, SSL, PLAINTEXT and SASL_SSL.
+    # see https://rasa.com/docs/rasa/event-brokers#authentication-and-authorization
+    security_protocol: PLAINTEXT
+    # required settings for SASL & SASL_SSL protocols
+    # Username for plain authentication.
+    sasl_username: null
+    # Password for plain authentication.
+    sasl_password: null
+    # Valid values are: PLAIN, GSSAPI, OAUTHBEARER, SCRAM-SHA-256, SCRAM-SHA-512
+    sasl_mechanism: PLAIN
+    # required settings for SSL & SASL_SSL protocols
+    # .pem CA root cert
+    ssl_cafile: null
+    # .pem TLS cert
+    ssl_certfile: null
+    # .pem TLS key 
+    ssl_keyfile: null
+    # whether clients should verify if the broker's hostname matches the certificate
+    ssl_check_hostname: False
+
+
+
 # redis specific settings (https://hub.helm.sh/charts/bitnami/redis/10.5.14)
 redis:
   # Install should be `true` if the redis subchart should be used