Fix freezed spice console in horizon

This trivial patch is setting "timeout tunnel" in haproxy's
configuration for spicehtml5proxy. This option extends time
when spice's websocket connection is closed, so spice will
not be freezed. Default value is set to 1h as it is in novnc.

Closes-Bug: #1938549
Change-Id: I3a5cd98ecf4916ebd0748e7c08111ad0e4dca0b2
(cherry picked from commit c281a01)

Author: keuko

ansible/roles/nova-cell/defaults/main.yml

@@ -409,6 +409,7 @@ nova_cell_bootstrap_extra_volumes: "{{ nova_extra_volumes }}"
 # HAProxy
 ####################
 haproxy_nova_serialconsole_proxy_tunnel_timeout: "10m"
+haproxy_nova_spicehtml5_proxy_tunnel_timeout: "1h"
 
 ####################
 # OpenStack

ansible/roles/nova-cell/tasks/loadbalancer.yml

@@ -78,12 +78,16 @@
             external: false
             port: "{{ hostvars[groups[cell_proxy_group][0]]['nova_spicehtml5proxy_port'] }}"
             listen_port: "{{ hostvars[groups[cell_proxy_group][0]]['nova_spicehtml5proxy_listen_port'] }}"
+            backend_http_extra:
+              - "timeout tunnel {{ haproxy_nova_spicehtml5_proxy_tunnel_timeout }}"
           nova_spicehtml5proxy_external:
             enabled: "{{ hostvars[groups[cell_proxy_group][0]]['nova_console'] == 'spice' }}"
             mode: "http"
             external: true
             port: "{{ hostvars[groups[cell_proxy_group][0]]['nova_spicehtml5proxy_port'] }}"
             listen_port: "{{ hostvars[groups[cell_proxy_group][0]]['nova_spicehtml5proxy_listen_port'] }}"
+            backend_http_extra:
+              - "timeout tunnel {{ haproxy_nova_spicehtml5_proxy_tunnel_timeout }}"
   tags: always
 
 - import_tasks: proxy_loadbalancer.yml

releasenotes/notes/bug-1938549-e73042a61f0a5935.yaml

@@ -0,0 +1,10 @@
+---
+features:
+  - |
+    Adds config parameter ``haproxy_nova_spicehtml5_proxy_tunnel_timeout``
+    to configure the ``Tunnel TimeOut`` directive for spicehtml5proxy
+    haproxy service.
+fixes:
+  - |
+    Fixes an issue where spice console is freezed after while,
+    see `LP#1938549 <https://launchpad.net/bugs/1938549>`__.