Allow configuring proxy_host and proxy_port in nova.conf

Following patch I2d46b926f1c895aba412d84b4ee059fda3df9011, if
proxy_host/proxy_port is configured in nova.conf or passed via
command line, they are not taking effect for novncproxy, spice
htmlproxy and serial proxy. This patch fixes the issue by
parsing the arguments before calling baseproxy.

Closes-Bug: #1424647
Change-Id: I183309d7f0a3b86881f05e7fe65d1399170b5a3d

nova/cmd/baseproxy.py

@@ -23,7 +23,6 @@ import sys
 from oslo_config import cfg
 from oslo_log import log as logging
 
-from nova import config
 from nova.console import websocketproxy
 from nova.openstack.common.report import guru_meditation_report as gmr
 from nova import version
@@ -44,8 +43,6 @@ def exit_with_error(msg, errno=-1):
 
 
 def proxy(host, port):
-    # Setup flags
-    config.parse_args(sys.argv)
 
     if CONF.ssl_only and not os.path.exists(CONF.cert):
         exit_with_error("SSL only and %s not found" % CONF.cert)

nova/cmd/novncproxy.py

@@ -18,9 +18,12 @@ Websocket proxy that is compatible with OpenStack Nova
 noVNC consoles. Leverages websockify.py by Joel Martin
 """
 
+import sys
+
 from oslo_config import cfg
 
 from nova.cmd import baseproxy
+from nova import config
 
 
 opts = [
@@ -39,6 +42,7 @@ CONF.register_cli_opts(opts)
 def main():
     # set default web flag option
     CONF.set_default('web', '/usr/share/novnc')
+    config.parse_args(sys.argv)
 
     baseproxy.proxy(
         host=CONF.novncproxy_host,

nova/cmd/serialproxy.py

@@ -17,10 +17,12 @@ Websocket proxy that is compatible with OpenStack Nova
 Serial consoles. Leverages websockify.py by Joel Martin.
 Based on nova-novncproxy.
 """
+import sys
 
 from oslo_config import cfg
 
 from nova.cmd import baseproxy
+from nova import config
 
 
 opts = [
@@ -39,6 +41,7 @@ CONF.register_cli_opts(opts, group="serial_console")
 def main():
     # set default web flag option
     CONF.set_default('web', None)
+    config.parse_args(sys.argv)
 
     baseproxy.proxy(
         host=CONF.serial_console.serialproxy_host,

nova/cmd/spicehtml5proxy.py

@@ -18,9 +18,12 @@ Websocket proxy that is compatible with OpenStack Nova
 SPICE HTML5 consoles. Leverages websockify.py by Joel Martin
 """
 
+import sys
+
 from oslo_config import cfg
 
 from nova.cmd import baseproxy
+from nova import config
 
 
 opts = [
@@ -37,6 +40,7 @@ CONF.register_cli_opts(opts, group='spice')
 
 
 def main():
+    config.parse_args(sys.argv)
 
     baseproxy.proxy(
         host=CONF.spice.html5proxy_host,