Overcloud: HA:  haproxy check connections  messages flood /var/log/messages file. You can see HAPROXYSSLCHK timestamp in the logs.
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    Jul 20 09:26:22 localhost glance-registry: self.send_response(code, message)
    Jul 20 09:26:22 localhost glance-registry: File "/usr/lib64/python2.7/BaseHTTPServer.py", line 396, in send_response
    Jul 20 09:26:22 localhost glance-registry: self.send_header('Date', self.date_time_string())
    Jul 20 09:26:22 localhost glance-registry: File "/usr/lib64/python2.7/BaseHTTPServer.py", line 401, in send_header
    Jul 20 09:26:22 localhost glance-registry: self.wfile.write("%s: %s\r\n" % (keyword, value))
    Jul 20 09:26:22 localhost glance-registry: File "/usr/lib64/python2.7/socket.py", line 324, in write
    Jul 20 09:26:22 localhost glance-registry: self.flush()
    Jul 20 09:26:22 localhost glance-registry: File "/usr/lib64/python2.7/socket.py", line 303, in flush
    Jul 20 09:26:22 localhost glance-registry: self._sock.sendall(view[write_offset:write_offset+buffer_size])
    Jul 20 09:26:22 localhost glance-registry: File "/usr/lib/python2.7/site-packages/eventlet/greenio/base.py", line 376, in sendall
    Jul 20 09:26:22 localhost glance-registry: tail = self.send(data, flags)
    Jul 20 09:26:22 localhost glance-registry: File "/usr/lib/python2.7/site-packages/eventlet/greenio/base.py", line 359, in send
    Jul 20 09:26:22 localhost glance-registry: total_sent += fd.send(data[total_sent:], flags)
    Jul 20 09:26:22 localhost glance-registry: error: [Errno 104] Connection reset by peer
    Jul 20 09:26:22 localhost glance-registry: 10.35.169.11 - - [20/Jul/2015 09:26:22] code 400, message Bad request syntax ('\x16\x03\x00\x00y\x01\x00\x00u\x03\x00U\xac\xf6\xfeHAPROXYSSLCHK')
    Jul 20 09:26:22 localhost glance-registry: 10.35.169.11 - - [20/Jul/2015 09:26:22] "
    Jul 20 09:26:22 localhost glance-registry: 10.35.169.14 - - [20/Jul/2015 09:26:22] code 400, message Bad request syntax ('\x16\x03\x00\x00y\x01\x00\x00u\x03\x00U\xac\xf6\xfeHAPROXYSSLCHK')
    Jul 20 09:26:22 localhost glance-registry: 10.35.169.14 - - [20/Jul/2015 09:26:22] "
    Jul 20 09:26:23 localhost su: (to rabbitmq) root on none
    Jul 20 09:26:23 localhost systemd: Starting Session c197 of user rabbitmq.
    Jul 20 09:26:23 localhost systemd: Started Session c197 of user rabbitmq.
    Jul 20 09:26:23 localhost su: (to rabbitmq) root on none
    Jul 20 09:26:23 localhost systemd: Starting Session c198 of user rabbitmq.
    Jul 20 09:26:23 localhost systemd: Started Session c198 of user rabbitmq.
    Jul 20 09:26:24 localhost glance-registry: 10.35.169.12 - - [20/Jul/2015 09:26:24] code 400, message Bad request syntax ('\x16\x03\x00\x00y\x01\x00\x00u\x03\x00U\xac\xf7\x00HAPROXYSSLCHK')
    Jul 20 09:26:24 localhost glance-registry: 10.35.169.12 - - [20/Jul/2015 09:26:24] "
    Jul 20 09:26:24 localhost glance-registry: Traceback (most recent call last):
    Jul 20 09:26:24 localhost glance-registry: File "/usr/lib/python2.7/site-packages/eventlet/greenpool.py", line 82, in _spawn_n_impl
    Jul 20 09:26:24 localhost glance-registry: func(*args, **kwargs)
    Jul 20 09:26:24 localhost glance-registry: File "/usr/lib/python2.7/site-packages/eventlet/wsgi.py", line 686, in process_request
    Jul 20 09:26:24 localhost glance-registry: proto.__init__(sock, address, self)
    Jul 20 09:26:24 localhost glance-registry: File "/usr/lib64/python2.7/SocketServer.py", line 649, in __init__
    Jul 20 09:26:24 localhost glance-registry: self.handle()
    Jul 20 09:26:24 localhost glance-registry: File "/usr/lib64/python2.7/BaseHTTPServer.py", line 340, in handle
    Jul 20 09:26:24 localhost glance-registry: self.handle_one_request()
    Jul 20 09:26:24 localhost glance-registry: File "/usr/lib/python2.7/site-packages/eventlet/wsgi.py", line 325, in handle_one_request
    Jul 20 09:26:24 localhost glance-registry: if not self.parse_request():
    Jul 20 09:26:24 localhost glance-registry: File "/usr/lib64/python2.7/BaseHTTPServer.py", line 286, in parse_request
    Jul 20 09:26:24 localhost glance-registry: self.send_error(400, "Bad request syntax (%r)" % requestline)
    Jul 20 09:26:24 localhost glance-registry: File "/usr/lib64/python2.7/BaseHTTPServer.py", line 368, in send_error
    Jul 20 09:26:24 localhost glance-registry: self.send_response(code, message)
    Jul 20 09:26:24 localhost glance-registry: File "/usr/lib64/python2.7/BaseHTTPServer.py", line 396, in send_response
    Jul 20 09:26:24 localhost glance-registry: self.send_header('Date', self.date_time_string())
    Jul 20 09:26:24 localhost glance-registry: File "/usr/lib64/python2.7/BaseHTTPServer.py", line 401, in send_header
    Jul 20 09:26:24 localhost glance-registry: self.wfile.write("%s: %s\r\n" % (keyword, value))
    Jul 20 09:26:24 localhost glance-registry: File "/usr/lib64/python2.7/socket.py", line 324, in write
    Jul 20 09:26:24 localhost glance-registry: self.flush()
    Jul 20 09:26:24 localhost glance-registry: File "/usr/lib64/python2.7/socket.py", line 303, in flush
    Jul 20 09:26:24 localhost glance-registry: self._sock.sendall(view[write_offset:write_offset+buffer_size])
    Jul 20 09:26:24 localhost glance-registry: File "/usr/lib/python2.7/site-packages/eventlet/greenio/base.py", line 376, in sendall
    Jul 20 09:26:24 localhost glance-registry: tail = self.send(data, flags)
    Jul 20 09:26:24 localhost glance-registry: File "/usr/lib/python2.7/site-packages/eventlet/greenio/base.py", line 359, in send
    Jul 20 09:26:24 localhost glance-registry: total_sent += fd.send(data[total_sent:], flags)
    Jul 20 09:26:24 localhost glance-registry: error: [Errno 104] Connection reset by peer
    Jul 20 09:26:24 localhost glance-registry: 10.35.169.11 - - [20/Jul/2015 09:26:24] code 400, message Bad request syntax ('\x16\x03\x00\x00y\x01\x00\x00u\x03\x00U\xac\xf7\x00HAPROXYSSLCHK')
    Jul 20 09:26:24 localhost glance-registry: 10.35.169.11 - - [20/Jul/2015 09:26:24] "
    Jul 20 09:26:24 localhost glance-registry: 10.35.169.14 - - [20/Jul/2015 09:26:24] code 400, message Bad request syntax ('\x16\x03\x00\x00y\x01\x00\x00u\x03\x00U\xac\xf7\x00HAPROXYSSLCHK')
    Jul 20 09:26:24 localhost glance-registry: 10.35.169.14 - - [20/Jul/2015 09:26:24] "