Add async options to Kafka connector chart

Fixes: openfaasltd/kafka-connector#62

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

chart/kafka-connector/Chart.yaml

@@ -1,7 +1,7 @@
 apiVersion: v1
 description: Connect OpenFaaS functions to Kafka topics
 name: kafka-connector
-version: 0.4.0
+version: 0.4.1
 sources:
 - https://github.com/openfaas-incubator/kafka-connector
 home: https://www.openfaas.com

chart/kafka-connector/README.md

@@ -48,13 +48,14 @@ Additional kafka-connector options in `values.yaml`.
 
 | Parameter                | Description                                                                            | Default                        |
 | ------------------------ | -------------------------------------------------------------------------------------- | ------------------------------ |
-| `upstream_timeout`       | Maximum timeout for upstream function call, must be a Go formatted duration string.    | `30s`                          |
-| `rebuild_interval`       | Interval for rebuilding function to topic map, must be a Go formatted duration string. | `3s`                           |
 | `topics`                 | Topics to which the connector will bind, provide as a comma-separated list.            | `faas-request`                 |
-| `gateway_url`            | The URL for the API gateway.                                                           | `http://gateway.openfaas:8080` |
-| `broker_host`            | location of the Kafka brokers.                                                         | `kafka`                        |
-| `print_response`         | Output the response of calling a function in the logs.                                 | `true`                         |
-| `print_response_body`         | Output to the logs the response body when calling a function.                                 | `false`                         |
+| `brokerHost`             | location of the Kafka brokers.                                                         | `kafka`                        |
+| `asyncInvocation`        | For long running or slow functions, offload to asychronous function invocations and carry on processing the stream |
+| `upstreamTimeout`       | Maximum timeout for upstream function call, must be a Go formatted duration string.    | `30s`                          |
+| `rebuildInterval`        | Interval for rebuilding function to topic map, must be a Go formatted duration string. | `3s`                           |
+| `gatewayURL`             | The URL for the API gateway.                                                           | `http://gateway.openfaas:8080` |
+| `printResponse`          | Output the response of calling a function in the logs.                                 | `true`                         |
+| `printResponseBody`      | Output to the logs the response body when calling a function.                                 | `false`                         |
 | `fullnameOverride`       | Override the name value used for the Connector Deployment object.                      | ``                             |
 
 Specify each parameter using the `--set key=value[,key=value]` argument to `helm install`.

chart/kafka-connector/templates/deployment.yml

@@ -44,28 +44,30 @@ spec:
           image: {{ .Values.image }}
           env:
             - name: gateway_url
-              value: {{ .Values.gateway_url | quote }}
+              value: {{ .Values.gatewayURL | quote }}
             - name: topics
               value: {{ .Values.topics | quote }}
             - name: print_response
-              value: {{ .Values.print_response | quote }}
+              value: {{ .Values.printResponse | quote }}
             - name: print_response_body
-              value: {{ .Values.print_response_body | quote }}
-            {{- if .Values.basic_auth }}
+              value: {{ .Values.printResponseBody | quote }}
+            - name: asynchronous_invocation
+              value: {{ .Values.asyncInvocation | quote }}
+            {{- if .Values.basicAuth }}
             - name: basic_auth
               value: "true"
             - name: secret_mount_path
               value: "/var/secrets"
             {{- end }}
             - name: broker_host
-              value: {{ .Values.broker_host | quote }}
-            {{- if .Values.upstream_timeout }}
+              value: {{ .Values.brokerHost | quote }}
+            {{- if .Values.upstreamTimeout }}
             - name: upstream_timeout
-              value: {{ .Values.upstream_timeout | quote }}
+              value: {{ .Values.upstreamTimeout | quote }}
             {{- end }}
-            {{- if .Values.rebuild_interval }}
+            {{- if .Values.rebuildInterval }}
             - name: rebuild_interval
-              value: {{ .Values.rebuild_interval | quote }}
+              value: {{ .Values.rebuildInterval | quote }}
             {{- end }}
           {{- if .Values.basic_auth }}
           volumeMounts:

chart/kafka-connector/values.yaml

@@ -1,11 +1,26 @@
 image: openfaas/kafka-connector:0.4.0
 replicas: 1
-gateway_url: http://gateway.openfaas:8080
+
+# Max timeout for a function
+upstreamTimeout: 2m
+
+# Use with slow consumers or long running functions
+asyncInvocation: false
+
+# Alter to the topics required
 topics: faas-request
-print_response: true
-print_response_body: false
-broker_host: kafka:9092
-basic_auth: true
+
+# Your Kafka broker
+brokerHost: kafka:9092
+
+printResponse: true
+printResponseBody: false
+
+# Internal gateway URL
+gatewayURL: http://gateway.openfaas:8080
+
+# Basic auth for the gateway
+basicAuth: true
 
 nodeSelector: {}