Addon: Kubeless serverless functions with PubSub

50kafka.yml

@@ -10,6 +10,7 @@ spec:
     metadata:
       labels:
         app: kafka
+        kubeless: kafka
       annotations:
     spec:
       terminationGracePeriodSeconds: 30

addon-kubeless/00namespace.yml

@@ -0,0 +1,5 @@
+---
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: kubeless

addon-kubeless/bootstrap-service.yml

@@ -0,0 +1,11 @@
+# Allows bootstrap_servers = kafka.kubeless:9092 while kafka is in a different namespace
+kind: Service
+apiVersion: v1
+metadata:
+  name: kafka
+  namespace: kubeless
+spec:
+  type: ExternalName
+  externalName: bootstrap.kafka.svc.cluster.local
+  ports:
+  - port: 9092

addon-kubeless/kubeless.yml

@@ -0,0 +1,36 @@
+---
+apiVersion: extensions/v1beta1
+description: Kubernetes Native Serverless Framework
+kind: ThirdPartyResource
+metadata:
+  name: function.k8s.io
+versions:
+- name: v1
+---
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: controller-acct
+  namespace: kubeless
+---
+apiVersion: apps/v1beta1
+kind: Deployment
+metadata:
+  labels:
+    kubeless: controller
+  name: kubeless-controller
+  namespace: kubeless
+spec:
+  selector:
+    matchLabels:
+      kubeless: controller
+  template:
+    metadata:
+      labels:
+        kubeless: controller
+    spec:
+      containers:
+      - image: bitnami/kubeless-controller@sha256:0bc030762e8694d268be75bed0d52ea6ecb84b03da85ffcbd55da4817c047052
+        imagePullPolicy: IfNotPresent
+        name: kubeless-controller
+      serviceAccountName: controller-acct

addon-kubeless/test-function-hello-pubsub.yml

@@ -0,0 +1,29 @@
+# This is basically https://github.com/kubeless/kubeless/blob/master/examples/nodejs/helloevent.js
+# created through:
+# ./kubeless function deploy helloevent --from-file helloevent.js --handler hello.handler --runtime nodejs8 --trigger-topic test-basic-with-kafkacat
+
+# Uses the topic from ../test/basic-with-kafkacat.yml,
+# which means it gets triggered every 10 seconds by the publisher there
+
+# See output:
+# kubectl -n default logs -lfunction=kubeless-test-function
+# Check for validation errors after create:
+# kubectl -n kubeless logs -lkubeless=controller --since=60s
+
+---
+apiVersion: k8s.io/v1
+kind: Function
+metadata:
+  name: kubeless-test-function
+  namespace: default
+spec:
+  handler: hello.handler
+  runtime: nodejs8
+  type: PubSub
+  topic: test-basic-with-kafkacat
+  function: |-
+    module.exports = {
+      handler: (context) => {
+        console.log('Serverless at', new Date().toUTCString(), 'with message:', context);
+      }
+    };