Add release note for node sharding

Release note covers changes in the previous 4 commits in this chain.

Change-Id: I5388e82e958acd930295215c9f9427080650866d

1 files changed, 14 insertions, 0 deletions

diff --git a/releasenotes/notes/shard-support-a26f8d2ab5cca582.yaml b/releasenotes/notes/shard-support-a26f8d2ab5cca582.yaml
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+features:
+  - Adds support for setting a shard key on a node, and filtering node or port
+    lists by shard. This shard key is not used for any purpose internally in
+    Ironic, but instead is intended to allow API clients to filter for a
+    subset of nodes or ports. Being able to fetch only a subset of nodes or
+    ports is useful for parallelizing any operational task that needs to be
+    performed across all nodes or ports.
+  - Adds support for querying for nodes which are sharded or unsharded. This
+    is useful for allowing operators to find nodes which have not been
+    assigned a shard key.
+  - Adds support for querying for a list of shards via ``/v1/shards``. This
+    endpoint will return a list of currently assigned shard keys as well as
+    the count of nodes which has those keys assigned. Using this API endpoint,
+    operators can see a high level listing of how their nodes are sharded.