diff --git a/releasenotes/notes/composite-alarm-1b1ca9ea0e8f55c8.yaml b/releasenotes/notes/composite-alarm-1b1ca9ea0e8f55c8.yaml
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+---
+features:
+  - >
+    Add a new composite type alarm, which allow users specifying a composite
+    rule to define an alarm with multiple triggering conditions, using a
+    combination of *and*, *or* relationships. The composite rule is composed of
+    multiple threshold rules or gnocchi rules.