Allow threshold to be modified for individual pools

https://mirantis.jira.com/browse/PROD-22888

Change-Id: Id37414158b426f072eac9f12918b319094b11f1e
diff --git a/README.rst b/README.rst
index bc8e2b6..825f128 100644
--- a/README.rst
+++ b/README.rst
@@ -678,12 +678,21 @@
         space_used_critical_threshold: 0.85
         apply_latency_threshold: 0.007
         commit_latency_threshold: 0.7
-        pool_space_used_utilization_warning_threshold: 0.75
-        pool_space_used_critical_threshold: 0.85
-        pool_write_ops_threshold: 200
-        pool_write_bytes_threshold: 70000000
-        pool_read_bytes_threshold: 70000000
-        pool_read_ops_threshold: 1000
+        pool:
+          vms:
+            pool_space_used_utilization_warning_threshold: 0.75
+            pool_space_used_critical_threshold: 0.85
+            pool_write_ops_threshold: 200
+            pool_write_bytes_threshold: 70000000
+            pool_read_bytes_threshold: 70000000
+            pool_read_ops_threshold: 1000
+          images:
+            pool_space_used_utilization_warning_threshold: 0.50
+            pool_space_used_critical_threshold: 0.95
+            pool_write_ops_threshold: 100
+            pool_write_bytes_threshold: 50000000
+            pool_read_bytes_threshold: 50000000
+            pool_read_ops_threshold: 500
 
 Ceph monitor backups
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