Add sc1 storageclass for AWS

admin/AWS_README.md

@@ -88,6 +88,28 @@ You can update your kubectl to easily access the AWS cluster by running:
 aws eks update-kubeconfig --region $AWS_DEFAULT_REGION --name <aws cluster name>
 ```
 
+## Additional AWS EBS Storage Classes
+
+By default, at the time of writing, AWS only provides one StorageClass on a new
+cluster, `gp2`. This is an SSD-based and relatively expensive block storage. To
+add additional storage classes for other EBS options we have to define a new
+StorageClass YAML and install it on the cluster. An example is shown below where
+a YAML file named `sc1-storageclass.yaml` could contain:
+
+```yaml
+kind: StorageClass
+apiVersion: storage.k8s.io/v1
+metadata:
+  name: sc1
+provisioner: kubernetes.io/aws-ebs
+parameters:
+  type: sc1
+  fsType: ext4
+```
+
+Then run `kubectl apply -f sc1-storageclass.yaml` to install it. Components
+can then use 'sc1' as their storage class.
+
 ## Block Storage
 
 By default your AWS cluster likely has a single storage class called `gp2`.

ci_aws/sc1-storageclass.yaml

+kind: StorageClass
+apiVersion: storage.k8s.io/v1
+metadata:
+  name: sc1
+provisioner: kubernetes.io/aws-ebs
+parameters:
+  type: sc1
+  fsType: ext4
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