diff --git a/defaults/openstack/init.yml b/defaults/openstack/init.yml
index 6623b29..b75f0c8 100644
--- a/defaults/openstack/init.yml
+++ b/defaults/openstack/init.yml
@@ -87,6 +87,24 @@
     keystone_old_version: ${_param:openstack_old_version}
     keystone_version: ${_param:openstack_version}
     keystone_upgrade_enabled: ${_param:openstack_upgrade_enabled}
+    # (obryndzii) Rotating keys too frequently, or with ``[fernet_tokens] max_active_keys``
+    # set too low, will cause tokens to become invalid prior to their expiration.
+    # As tokens may be fetched beyond their initial expiration period (nova live migration,
+    # cider volume backup), keys should not be fully rotated within the period of
+    # ``[token] expiration``+``[token] allow_expired_window`` seconds to prevent the tokens
+    # becoming unavailable.
+    # The max_active_keys default value was adjusted according to the following defaults:
+    # [token]/allow_expired_window = 172800 (48 hours)
+    # [token]/expiration = 3600 (1 hour)
+    # rotation_frequency = 1 hour (keystone_fernet_rotate_rsync_minute/hour 0 *)
+    # max_active_keys = (allow_expired_window + expiration)/rotation_frequency + 2
+    # In case of changing those defaults the keystone_tokens_max_active_keys value should be
+    # calculated according to the definition above.
+    keystone_tokens_expiration: 3600
+    keystone_tokens_max_active_keys: 51
+    keystone_tokens_allow_expired_window: 172800
+    keystone_fernet_rotate_rsync_minute: 0
+    keystone_fernet_rotate_rsync_hour: '*'
     # Manila
     manila_old_version: ${_param:openstack_old_version}
     manila_version: ${_param:openstack_version}
diff --git a/keystone/server/cluster.yml b/keystone/server/cluster.yml
index d64a6cb..7e9ea1b 100644
--- a/keystone/server/cluster.yml
+++ b/keystone/server/cluster.yml
@@ -11,7 +11,6 @@
 - system.keystone.client.os_client_config.admin_identity
 parameters:
   _param:
-    keystone_tokens_expiration: 3600
     openstack_node_role: primary
     keystone_service_protocol: ${_param:cluster_internal_protocol}
   linux:
@@ -58,7 +57,8 @@
       tokens:
         engine: fernet
         expiration: ${_param:keystone_tokens_expiration}
-        max_active_keys: 3
+        max_active_keys: ${_param:keystone_tokens_max_active_keys}
+        allow_expired_window: ${_param:keystone_tokens_allow_expired_window}
         location: /var/lib/keystone/fernet-keys
       credential:
         location: /var/lib/keystone/credential-keys
diff --git a/keystone/server/fernet_rotation/cluster.yml b/keystone/server/fernet_rotation/cluster.yml
index c34c4f8..cf7b328 100644
--- a/keystone/server/fernet_rotation/cluster.yml
+++ b/keystone/server/fernet_rotation/cluster.yml
@@ -36,7 +36,8 @@
           command: '/var/lib/keystone/keystone_keys_rotate.sh -r -s -t fernet >> /var/log/keystone/keystone-rotate.log 2>> /var/log/keystone/keystone-rotate.log'
           enabled: true
           user: keystone
-          minute: 0
+          minute: ${_param:keystone_fernet_rotate_rsync_minute}
+          hour: ${_param:keystone_fernet_rotate_rsync_hour}
         keystone_credential_rotate_rsync:
           command: '/var/lib/keystone/keystone_keys_rotate.sh -r -s -t credential >> /var/log/keystone/keystone-rotate.log 2>> /var/log/keystone/keystone-rotate.log'
           enabled: true
diff --git a/keystone/server/fernet_rotation/single.yml b/keystone/server/fernet_rotation/single.yml
index 8a3d6fb..7514086 100644
--- a/keystone/server/fernet_rotation/single.yml
+++ b/keystone/server/fernet_rotation/single.yml
@@ -22,7 +22,8 @@
           command: '/var/lib/keystone/keystone_keys_rotate.sh -r -t fernet >> /var/log/keystone/keystone-rotate.log 2>> /var/log/keystone/keystone-rotate.log'
           enabled: true
           user: keystone
-          minute: 0
+          minute: ${_param:keystone_fernet_rotate_rsync_minute}
+          hour: ${_param:keystone_fernet_rotate_rsync_hour}
         keystone_credential_rotate_rsync:
           command: '/var/lib/keystone/keystone_keys_rotate.sh -r -t credential >> /var/log/keystone/keystone-rotate.log 2>> /var/log/keystone/keystone-rotate.log'
           enabled: true
diff --git a/keystone/server/single.yml b/keystone/server/single.yml
index 6996968..9663488 100644
--- a/keystone/server/single.yml
+++ b/keystone/server/single.yml
@@ -13,7 +13,6 @@
     mysql_admin_user: root
     mysql_admin_password: password
     mysql_keystone_password: password
-    keystone_tokens_expiration: 3600
     openstack_node_role: primary
     keystone_service_protocol: ${_param:cluster_internal_protocol}
   linux:
@@ -57,7 +56,8 @@
       tokens:
         engine: fernet
         expiration: ${_param:keystone_tokens_expiration}
-        max_active_keys: 3
+        max_active_keys: ${_param:keystone_tokens_max_active_keys}
+        allow_expired_window: ${_param:keystone_tokens_allow_expired_window}
         location: /var/lib/keystone/fernet-keys
       credential:
         location: /var/lib/keystone/credential-keys