Update IAM permissions for minion, to allow EBS

cluster/aws/templates/iam/kubernetes-minion-policy.json

@@ -7,6 +7,21 @@
       "Resource": [
         "arn:aws:s3:::kubernetes-*"
       ]
+    },
+    {
+      "Effect": "Allow",
+      "Action": "ec2:Describe*",
+      "Resource": "*"
+    },
+    {
+      "Effect": "Allow",
+      "Action": "ec2:AttachVolume",
+      "Resource": "*"
+    },
+    {
+      "Effect": "Allow",
+      "Action": "ec2:DetachVolume",
+      "Resource": "*"
     }
   ]
 }