add cloudstate how-to (#339)

howto/setup-state-store/README.md

@@ -44,6 +44,7 @@ kubectl apply -f statestore.yaml
 
 * [Setup Aerospike](./setup-aerospike.md)
 * [Setup Cassandra](./setup-cassandra.md)
+* [Setup Cloudstate](./setup-cloudstate.md)
 * [Setup Couchbase](./setup-couchbase.md)
 * [Setup etcd](./setup-etcd.md)
 * [Setup Hashicorp Consul](./setup-consul.md)

howto/setup-state-store/setup-cloudstate.md

@@ -0,0 +1,146 @@
+# Setup Cloudstate 
+
+## Kubernetes
+
+To install Cloudstate on your Kubernetes cluster, run the following commands:
+
+```
+kubectl create namespace cloudstate
+kubectl apply -n cloudstate -f https://github.com/cloudstateio/cloudstate/releases/download/v0.5.0/cloudstate-0.5.0.yaml
+```
+
+This will install Cloudstate into the `cloudstate` namespace with version `0.5.0`.
+
+## Create a Dapr component
+
+The next step is to create a Dapr component for Cloudstate.
+
+Create the following YAML file named `cloudstate.yaml`:
+
+```
+apiVersion: dapr.io/v1alpha1
+kind: Component
+metadata:
+  name: cloudstate
+spec:
+  type: state.cloudstate
+  metadata:
+  - name: host
+    value: "localhost:8013"
+  - name: serverPort
+    value: "8080"
+```
+
+The `metadata.host` field specifies the address for the Cloudstate API. Since Cloudstate will be running as an additional sidecar in the pod, you can reach it via `localhost` with the default port of `8013`.
+
+The `metadata.serverPort` field specifies the port to be opened in Dapr for Cloudstate to callback to. This can be any free port that is not used by either your application or Dapr.
+
+## Apply the configuration
+
+### In Kubernetes
+
+To apply the Cloudstate state store to Kubernetes, use the `kubectl` CLI:
+
+```
+kubectl apply -f cloudstate.yaml
+```
+
+## Running the Cloudstate sidecar alongside Dapr
+
+The next examples shows you how to manually inject a Cloudstate sidecar into a Dapr enabled deployment:
+
+*Notice the `HTTP_PORT` for the `cloudstate-sidecar` container is the port to be used in the Cloudstate component yaml in `host`.*
+
+```
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  annotations:
+  name: test-dapr-app
+  labels:
+    app: test-dapr-app
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: test-dapr-app
+  template:
+    metadata:
+      annotations:
+        dapr.io/enabled: "true"
+        dapr.io/id: "testapp"
+      labels:
+        app: test-dapr-app
+    spec:
+      containers:
+      - name: user-container
+        image: nginx
+      - name: cloudstate-sidecar
+        env:
+        - name: HTTP_PORT
+          value: "8013"
+        - name: USER_FUNCTION_PORT
+          value: "8080"
+        - name: REMOTING_PORT
+          value: "2552"
+        - name: MANAGEMENT_PORT
+          value: "8558"
+        - name: SELECTOR_LABEL_VALUE
+          value: test-dapr-app
+        - name: SELECTOR_LABEL
+          value: app
+        - name: REQUIRED_CONTACT_POINT_NR
+          value: "1"
+        - name: JAVA_OPTS
+          value: -Xms256m -Xmx256m
+        image: cloudstateio/cloudstate-proxy-no-store:0.5.0
+        livenessProbe:
+          httpGet:
+            path: /alive
+            port: 8558
+            scheme: HTTP
+          initialDelaySeconds: 2
+          failureThreshold: 20
+          periodSeconds: 2
+        readinessProbe:
+          httpGet:
+            path: /ready
+            port: 8558
+            scheme: HTTP
+          initialDelaySeconds: 2
+          failureThreshold: 20
+          periodSeconds: 10
+        resources:
+          limits:
+            memory: 512Mi
+          requests:
+            cpu: 400m
+            memory: 512Mi
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  name: cloudstate-pod-reader
+rules:
+- apiGroups:
+  - ""
+  resources:
+  - pods
+  verbs:
+  - get
+  - watch
+  - list
+
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: cloudstate-read-pods-default
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: cloudstate-pod-reader
+subjects:
+- kind: ServiceAccount
+  name: default
+  ```

howto/setup-state-store/supported-state-stores.md

@@ -4,6 +4,7 @@
 | ------------- | -------|------ |
 | Aerospike  | :white_check_mark:  | :x: |
 | Cassandra | :white_check_mark: | :x: |
+| Cloudstate | :white_check_mark: | :x: |
 | Couchbase  | :white_check_mark:  | :x: |
 | etcd | :white_check_mark: | :x: |
 | Hashicorp Consul | :white_check_mark: | :x: |