Add Azure Service Bus Topics How To (#245)

howto/setup-pub-sub-message-broker/README.md

@@ -44,3 +44,4 @@ kubectl apply -f pubsub.yaml
 
 [Setup Redis Streams](./setup-redis.md)
 [Setup NATS](./setup-nats.md)
+[Setup Azure Service bus](./setup-azure-servicebus.md)

howto/setup-pub-sub-message-broker/setup-azure-servicebus.md

@@ -0,0 +1,51 @@
+# Setup Azure Service Bus
+
+Follow the instructions [here](https://docs.microsoft.com/en-us/azure/service-bus-messaging/service-bus-quickstart-topics-subscriptions-portal) on setting up Azure Service Bus Topics.
+
+## Create a Dapr component
+
+The next step is to create a Dapr component for Azure Service Bus.
+
+Create the following YAML file named `azuresb.yaml`:
+
+```
+apiVersion: dapr.io/v1alpha1
+kind: Component
+metadata:
+  name: <name>
+spec:
+  type: pubsub.azure.servicebus
+  metadata:
+  - name: connectionString
+    value: <REPLACE-WITH-CONNECTION-STRING> # Required.
+  - name: timeoutInSec
+    value: <REPLACE-WITH-TIMEOUT-IN-SEC> # Optional. Default: "60".
+  - name: disableEntityManagement
+    value: <REPLACE-WITH-DISABLE-ENTITY-MANAGEMENT> # Optional. Default: false. When set to true, topics and subscriptions do not get created automatically.
+  - name: maxDeliveryCount
+    value: <REPLACE-WITH-MAX-DELIVERY-COUNT> # Optional.
+  - name: lockDurationInSec
+    value: <REPLACE-WITH-LOCK-DURATION-IN-SEC> # Optional.
+  - name: defaultMessageTimeToLiveInSec
+    value: <REPLACE-WITH-MESSAGE-TIME-TO-LIVE-IN-SEC> # Optional.
+  - name: autoDeleteOnIdleInSec
+    value: <REPLACE-WITH-AUTO-DELETE-ON-IDLE-IN-SEC> # Optional.
+```
+
+The above example uses secrets as plain strings. It is recommended to use a secret store for the secrets as described [here](../../concepts/components/secrets.md)
+
+
+## Apply the configuration
+
+### In Kubernetes
+
+To apply the Azure Service Bus pub/sub to Kubernetes, use the `kubectl` CLI:
+
+```
+kubectl apply -f azuresb.yaml
+```
+
+### Running locally
+
+The Dapr CLI will automatically create a directory named `components` in your current working directory with a Redis component.
+To use Azure Service Bus, replace the redis_messagebus.yaml file with azuresb.yaml above.