[Spec Lite] Deprecate metadata_encryption_key

Change-Id: I319bb35661e859618d6d5c57cc99d548c569b211

specs/2024.2/approved/glance/deprecate-metadata-encryption-key.rst

@@ -0,0 +1,46 @@
+..
+ This work is licensed under a Creative Commons Attribution 3.0 Unported
+ License.
+
+ http://creativecommons.org/licenses/by/3.0/legalcode
+
+============================================
+Spec Lite: Deprecate metadata_encryption_key
+============================================
+
+..
+  Mandatory sections
+
+:project: glance
+
+:problem: `metadata_encryption_key` config option and it's related
+          functionality was added quite a long back ago. Even though as per
+          the description it encrypts the location metadata, it actually
+          encrypts location url. It encrypts the location url only for image
+          upload/import/download/show APIs, doesn't encrypt url on location
+          APIs. If it's enabled during upgrade then it will break the
+          existing deployment since existing image url is not been encrypted.
+          It doesn't even work for location url encryption as expected since
+          it does not encrypts the legacy images url on start up, download
+          of that image fails with InvalidLocation error.
+
+:solution: We decided to deprecate `metadata_encryption_key` config option in
+           this cycle and remove it in `E` (2025.1) cycle.
+
+:impacts: None
+
+:how: In this cycle deprecate `metadata_encryption_key` configuration
+      options. Remove it along with it's related functionality in next
+      or this cycle.
+
+:alternatives: None
+
+:timeline: Milestone 2
+
+:link: None
+
+:reviewers: abhishekk, croelandt, mrjoshi
+
+:assignee: pdeore
+
+

specs/2024.2/approved/index.rst

@@ -6,8 +6,10 @@
    :glob:
    :maxdepth: 1
 
-TODO: fill this in once a new approved spec is added.
-
-
+2024.2 approved specs for glance:
 
+.. toctree::
+    :glob:
+    :maxdepth: 1
 
+    glance/*