commit c37081f441167ac1bd61140b9a3e263b09186e0c
Author: Liam Young <liam.young@canonical.com>
Date:   Thu Sep 24 12:16:28 2020 +0000

    Fix race in http <-> https switch
    
    If the charm switches the service from http to https (or vice versa)
    and the default identity-service handler has already run during this
    hook execution then keystone is not informed of the change until a
    subsequant hook execution. This subsequant hook could be
    update-status as the charm currently does not disable any of its
    methods during update-status hooks.
    
    Change-Id: I5f11c2439b74f893b757951cab3da4d49888375c

diff --git a/src/reactive/placement_handlers.py b/src/reactive/placement_handlers.py
index 75612ac..e3814af 100644
--- a/src/reactive/placement_handlers.py
+++ b/src/reactive/placement_handlers.py
@@ -16,6 +16,7 @@ import charms.reactive as reactive
 
 import charms_openstack.bus
 import charms_openstack.charm
+import charmhelpers.core as ch_core
 
 charms_openstack.bus.discover()
 
@@ -37,9 +38,22 @@ charms_openstack.charm.use_defaults(
 @reactive.when('identity-service.available')
 def render_config(*args):
     with charms_openstack.charm.provide_charm_instance() as placement_charm:
+        pre_ssl_enabled = placement_charm.get_state('ssl.enabled')
         placement_charm.configure_tls(
             certificates_interface=reactive.endpoint_from_flag(
                 'certificates.available'))
+        ssl_enabled = placement_charm.get_state('ssl.enabled')
+        if ssl_enabled != pre_ssl_enabled:
+            ch_core.hookenv.log((
+                "Detected switch to ssl.enabled: {}. "
+                "Informing keystone.").format(ssl_enabled))
+            keystone = reactive.endpoint_from_flag(
+                'identity-service.available')
+            keystone.register_endpoints(placement_charm.service_type,
+                                        placement_charm.region,
+                                        placement_charm.public_url,
+                                        placement_charm.internal_url,
+                                        placement_charm.admin_url)
         placement_charm.upgrade_if_available(args)
         placement_charm.render_with_interfaces(args)
         placement_charm.assess_status()