update changelog

Signed-off-by: Jacob Lisi <[email protected]>

Author: jtlisi

CHANGELOG.md

@@ -2,9 +2,14 @@
 
 ## master / unreleased
 
+* [CHANGE] Alertmanager storage backend no longer defaults to `gcs` with bucket name `'%(cluster)s-cortex-%(namespace)s' % $._config`. #258
 * [CHANGE] Only single cluster and namespace can now be selected in "resources" dashboards. #251
 * [CHANGE] Increased `CortexAllocatingTooMuchMemory` warning alert threshold from 50% to 65%. #256
 * [CHANGE] Cleaned up blocks storage config. Moved CLI flags used only be the read path from `genericBlocksStorageConfig` to `queryBlocksStorageConfig`, and flags used only by the ingester from `genericBlocksStorageConfig` to `ingester_args`. #257
+* [ENHANCEMENT] Add dedicated parameters to `_config` to configure Alertmanager backend storage. #258
+  * `alertmanager_client_type`
+  * `alertmanager_s3_bucket_name`
+  * `alertmanager_gcs_bucket_name`
 * [ENHANCEMENT] Added `unregister_ingesters_on_shutdown` config option to disable unregistering ingesters on shutdown (default is enabled). #213
 * [ENHANCEMENT] Improved blocks storage observability: #237
   - Cortex / Queries: added bucket index load operations and latency (available only when bucket index is enabled)