Merge pull request #903 from cnadolny/redis-docs

Added Redis Documentation

docs/rediscache/rediscache.md

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+# Redis Cache Operator
+
+This operator deploys an Azure Cache for Redis into a specified resource group at the specified location.
+
+Learn more about Azure Cache for Redis [here](https://docs.microsoft.com/en-us/azure/azure-cache-for-redis/cache-overview).
+
+Here is a [sample YAML](/config/samples/azure_v1alpha1_rediscache.yaml) to provision an Azure Cache for Redis.
+
+The spec is comprised of the following fields:
+- Location
+- ResourceGroupName
+- Properties
+    - SKU
+        - Name
+        - Family
+        - Capacity
+    - EnableNonSslPort
+    - SubnetID
+    - StaticIP
+    - Configuration
+- SecretName
+- KeyVaultToStoreSecrets
+
+### Required Fields
+
+A Redis Cache needs the following fields to deploy, along with a location and resource group.
+
+* `Properties.SKU.Name` Select a SKU, where the options are: _Basic_, _Standard_, and _Premium_.
+* `Properties.SKU.Family` Select a SKU Family, where the options are: _C_, _P_. If you selected a _Premium_ SKU, then the corresponding SKU Family is _P_.
+* `Properties.SKU.Capacity` Set the desired capacity 
+* `EnableNonSslPort` defaults to True
+
+### Optional Fields
+
+* `SecretName` specify the name of the secret. If none is given, it will fall back to the name of the redis cache.
+* `KeyVaultToStoreSecrets` specify a Key Vault to store primary and secondary credentials in. If none is given, it will default to storing credentials as a Kube Secret.
+* `Properties.SubnetID` specify a subnet ID to place the Redis Cache in
+* `Properties.StaticIP` specify a statis IP for the Redis Cache
+* `Properties.Configuration` specify configuration values as key value pairs for the Redis Cache
+
+### Secrets
+
+After creating an Azure Cache for Redis instance, the operator stores a JSON formatted secret with the following fields. For more details on where the secrets are stored, look [here](/docs/secrets.md).
+
+* `primaryKey`
+* `secondaryKey`
+
+## Deploy, view and delete resources
+
+You can follow the steps [here](/docs/customresource.md) to deploy, view and delete resources.