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-rw-r--r--doc/source/reference/storage/external-ceph-guide.rst9
1 files changed, 9 insertions, 0 deletions
diff --git a/doc/source/reference/storage/external-ceph-guide.rst b/doc/source/reference/storage/external-ceph-guide.rst
index a831015ba..90d488b19 100644
--- a/doc/source/reference/storage/external-ceph-guide.rst
+++ b/doc/source/reference/storage/external-ceph-guide.rst
@@ -537,6 +537,15 @@ This prevents cross-project and public object access. This can be resolved by
setting ``ceph_rgw_swift_account_in_url`` to ``true``. This should match the
``rgw_swift_account_in_url`` configuration option in Ceph RadosGW.
+.. warning::
+
+ When using an external Ceph RadosGW for object storage endpoints
+ (when ``enable_ceph_rgw: true``), operators are advised to set
+ ``update_keystone_service_user_passwords: false`` in``globals.yml``.
+ Leaving this option enabled causes the service user password to be reset
+ on every reconfigure, which invalidates existing tokens and can cause
+ unforeseen outages for object storage consumers.
+
Load balancing
==============