Remove uwsgi http port and add var for buffer-size

We don't use the http port, since nginx connects directly to the socket
on 127.0.0.1. Additionally, this adds a variable to allow the
buffer-size value in the uwsgi configuration to be set.

Change-Id: Icb1e7df83aa8e77aa4e93af2048318898d8e22ee

defaults/main.yml

@@ -275,9 +275,9 @@ nova_placement_nginx_access_log_format_extras: '$request_time $upstream_response
 nova_placement_nginx_extra_conf:
   - keepalive_timeout   70;
 nova_placement_uwsgi_socket_port: 8781
-nova_placement_uwsgi_http_port: 8782
 nova_wsgi_threads: 1
 nova_wsgi_processes: "{{ (ansible_processor_vcpus | int > 0) | ternary (ansible_processor_vcpus, 1) * 2}}"
+nova_wsgi_buffer_size: 65535
 
 ## Nova libvirt
 nova_libvirt_inject_key: False

templates/nova-placement-uwsgi.ini.j2

@@ -5,7 +5,6 @@ gid = {{ nova_system_group_name }}
 
 virtualenv = /openstack/venvs/nova-{{ nova_venv_tag }}
 wsgi-file = {{ nova_bin }}/nova-placement-api
-http = :{{ nova_placement_uwsgi_http_port }}
 socket = 127.0.0.1:{{ nova_placement_uwsgi_socket_port }}
 
 master = true
@@ -16,6 +15,6 @@ exit-on-reload = true
 die-on-term = true
 lazy-apps = true
 add-header = Connection: close
-buffer-size = 65535
+buffer-size = {{ nova_wsgi_buffer_size }}
 thunder-lock = true
 logfile-chmod = 644