Make TCP_KEEPIDLE configurable

Addresses LP bug #1031794.

Change-Id: I9a3a6a23b1bcec5229b15234512e04cc47c3ffd9

doc/source/configuring.rst

@@ -152,6 +152,13 @@ Number of backlog requests to configure the socket with.
 
 Optional. Default: ``4096``
 
+* ``tcp_keepidle=SECONDS``
+
+Sets the value of TCP_KEEPIDLE in seconds for each server socket.
+Not supported on OS X.
+
+Optional. Default: ``600``
+
 * ``workers=PROCESSES``
 
 Number of Glance API worker processes to start. Each worker

etc/glance-api.conf

@@ -32,6 +32,10 @@ log_file = /var/log/glance/api.log
 # Backlog requests when creating socket
 backlog = 4096
 
+# TCP_KEEPIDLE value in seconds when creating socket.
+# Not supported on OS X.
+# tcp_keepidle = 600
+
 # SQLAlchemy connection string for the reference implementation
 # registry server. Any valid SQLAlchemy connection string is fine.
 # See: http://www.sqlalchemy.org/docs/05/reference/sqlalchemy/connections.html#sqlalchemy.create_engine

etc/glance-registry.conf

@@ -18,6 +18,10 @@ log_file = /var/log/glance/registry.log
 # Backlog requests when creating socket
 backlog = 4096
 
+# TCP_KEEPIDLE value in seconds when creating socket.
+# Not supported on OS X.
+# tcp_keepidle = 600
+
 # SQLAlchemy connection string for the reference implementation
 # registry server. Any valid SQLAlchemy connection string is fine.
 # See: http://www.sqlalchemy.org/docs/05/reference/sqlalchemy/connections.html#sqlalchemy.create_engine

glance/common/wsgi.py

@@ -52,6 +52,7 @@ bind_opts = [
 
 socket_opts = [
     cfg.IntOpt('backlog', default=4096),
+    cfg.IntOpt('tcp_keepidle', default=600),
     cfg.StrOpt('cert_file'),
     cfg.StrOpt('key_file'),
 ]
@@ -130,7 +131,8 @@ def get_socket(default_port):
 
     # This option isn't available in the OS X version of eventlet
     if hasattr(socket, 'TCP_KEEPIDLE'):
-        sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPIDLE, 600)
+        sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPIDLE,
+                        CONF.tcp_keepidle)
 
     return sock