Improve ec_profiles role docs

Author: cityofships

roles/ec_profiles/README.md

@@ -6,8 +6,7 @@ This role creates/deletes Ceph EC profiles.
 
 ### Host prerequisites
 
-* The role assumes target hosts connection over SSH with user that has passwordless sudo configured.
-* Either direct Internet access or private registry with desired Ceph image accessible to all hosts is required.
+* The role assumes target host connection over SSH to the first MON server.
 
 ### Inventory
 
@@ -17,11 +16,16 @@ This role assumes the existence of the following groups:
 
 ## Role variables
 
-* `cephadm_ec_profiles`: A list of pools to define
+* `cephadm_ec_profiles`: A list of pools to manage.
    Example:
    ```
           cephadm_ec_profiles:
-   ```
+            - name: foo
+              k: 4
+              m: 2
+            - name: delete_me
+              state: absent
 
-Check the `cephadm_ec_profile` module docs for supported key options.
+   ```
 
+Check Erasure Code profiles [docs](https://docs.ceph.com/en/pacific/rados/operations/erasure-code-profile/#osd-erasure-code-profile-set) for supported key options.