Add support for SIMULTANEOUS_SESSIONS options

... which was added in 21.1.0 (Yoga) release[1].

[1] https://docs.openstack.org/horizon/latest/configuration/settings.html#simultaneous-sessions

Change-Id: I3d9b04c04828641535ff42866ee378b2b902ebe0

manifests/init.pp

@@ -345,12 +345,18 @@
 #    Defaults to undef
 #
 #  [*session_timeout*]
-#    (optional) The session timeout for horizon in seconds. After this many seconds of inactivity
-#    the user is logged out.
+#    (optional) The session timeout for horizon in seconds. After this many
+#    seconds of inactivity the user is logged out.
 #    Defaults to 3600.
 #
+#  [*simultaneous_sessions*]
+#    (optional) Controls whether a user can have multiple simultaneous
+#    sessions.
+#    Defaults to undef
+#
 #  [*token_timeout_margin*]
-#    (optional) A time margin in seconds to subtract from the real token's validity.
+#    (optional) A time margin in seconds to subtract from the real token's
+#    validity.
 #    Defaults to 0.
 #
 #  [*timezone*]
@@ -617,6 +623,7 @@ class horizon(
   $access_log_format                                = undef,
   $session_timeout                                  = 3600,
   $token_timeout_margin                             = 0,
+  $simultaneous_sessions                            = undef,
   $timezone                                         = 'UTC',
   Boolean $secure_cookies                           = false,
   $django_session_engine                            = undef,

releasenotes/notes/simultaneous_sessions-c503feb527139590.yaml

@@ -0,0 +1,4 @@
+---
+features:
+  - |
+    The new ``horizon::simultaneous_sessions`` parameter has been added.

spec/classes/horizon_init_spec.rb

@@ -128,6 +128,7 @@ describe 'horizon' do
           :keystone_default_domain          => 'domain.tld',
           :overview_days_range              => 1,
           :session_timeout                  => 1800,
+          :simultaneous_sessions            => 'allow',
           :token_timeout_margin             => 60,
           :timezone                         => 'Asia/Shanghai',
           :available_themes                 => [
@@ -216,6 +217,7 @@ describe 'horizon' do
           "            'level': 'DEBUG',",
           "            'handlers': ['console', 'syslog'],",
           'SESSION_TIMEOUT = 1800',
+          "SIMULTANEOUS_SESSIONS = 'allow'",
           'TOKEN_TIMEOUT_MARGIN = 60',
           'COMPRESS_ENABLED = False',
           'COMPRESS_OFFLINE = False',

templates/local_settings.py.erb

@@ -1041,6 +1041,11 @@ SECURITY_GROUP_RULES = {
 }
 
 SESSION_TIMEOUT = <%= @session_timeout %>
+<% if ! @simultaneous_sessions.nil? -%>
+# Control whether a same user can have multiple action sessions.
+#SIMULTANEOUS_SESSIONS = 'allow'
+SIMULTANEOUS_SESSIONS = '<%= @simultaneous_sessions %>'
+<% end -%>
 
 TOKEN_TIMEOUT_MARGIN = <%= @token_timeout_margin %>