Add Hazelcast pubsub howto (#454)

* Add Hazelcast pubsub howto

* Add reference to Hazelcast pubsub howto

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

@@ -47,3 +47,4 @@ kubectl apply -f pubsub.yaml
 - [Setup Azure Service bus](./setup-azure-servicebus.md)
 - [Setup RabbitMQ](./setup-rabbitmq.md)
 - [Setup GCP Pubsub](./setup-gcp.md)
+- [Setup Hazelcast Pubsub](./setup-hazelcast.md)

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

@@ -0,0 +1,51 @@
+# Setup Hazelcast 
+
+## Locally
+
+You can run Hazelcast locally using Docker:
+
+```
+docker run -e JAVA_OPTS="-Dhazelcast.local.publicAddress=127.0.0.1:5701" -p 5701:5701 hazelcast/hazelcast
+```
+
+You can then interact with the server using the `127.0.0.1:5701`.
+
+## Kubernetes
+
+The easiest way to install Hazelcast on Kubernetes is by using the [Helm chart](https://github.com/helm/charts/tree/master/stable/hazelcast):
+
+## Create a Dapr component
+
+The next step is to create a Dapr component for Hazelcast.
+
+Create the following YAML file named `hazelcast.yaml`:
+
+```
+apiVersion: dapr.io/v1alpha1
+kind: Component
+metadata:
+  name: <name>
+spec:
+  type: pubsub.hazelcast
+  metadata:
+  - name: hazelcastServers
+    value: <REPLACE-WITH-HOSTS> # Required. A comma delimited string of servers. Example: "hazelcast:3000,hazelcast2:3000"
+```
+
+The above example uses secrets as plain strings. It is recommended to use a secret store for the secrets as described [here](../../concepts/secrets/README.md).
+
+
+## Apply the configuration
+
+### In Kubernetes
+
+To apply the Hazelcast state store to Kubernetes, use the `kubectl` CLI:
+
+```
+kubectl apply -f hazelcast.yaml
+```
+
+### Running locally
+
+The Dapr CLI will automatically create a directory named `components` in your current working directory with a Redis component.
+To use Hazelcast, replace the redis.yaml file with the hazelcast.yaml above.