Other OpenStack services which instantiate a 'https' glanceclient using
ssl_compression=False and insecure=False (eg Nova, Cinder) are leaking
sockets due to glanceclient not closing the connection to the Glance
server.
This could happen for a sub-set of calls, eg 'show', 'delete', 'update'.
netstat -nopd would show the sockets would hang around forever:
... 127.0.0.1:9292 ESTABLISHED 9552/python off (0.00/0/0)
urllib's ConnectionPool relies on the garbage collector to tear down
sockets which are no longer in use. The 'verify_callback' function used to
validate SSL certs was holding a reference to the VerifiedHTTPSConnection
instance which prevented the sockets being torn down.
Change-Id: Idb3e68151c48ed623ab89d05d88ea48465429838
Closes-bug: 1423165
ef9fd9fca0