Hi Experts,

Thank you for effort to analyse my issue. Please find the below update as per your suggestion. Please advise for further step to fix the Horizon issue.. As per document below are necessary update for the configuration file.

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/etc/openstack-dashboard/local_settings
CACHES = {
    'default': {
        'BACKEND' : 'django.core.cache.backends.memcached.MemcachedCache',
        'LOCATION' : '127.0.0.1:11211'
    }
}
ALLOWED_HOSTS = ['*']
OPENSTACK_HOST = "control.labs.com"

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/etc/sysconfig/memcached
PORT="11211"
USER="memcached"
MAXCONN="1024"
CACHESIZE="64"
OPTIONS=""

-------------------------
@control ~]# getenforce
Disabled

-------------------------
/var/log/httpd/error_log
[Mon Nov 24 18:02:29 2014] [error] [client 192.168.2.7]     from local.local_settings import *  # noqa
[Mon Nov 24 18:02:29 2014] [error] [client 192.168.2.7]   File "/usr/share/openstack-dashboard/openstack_dashboard/wsgi/../../openstack_dashboard/local/local_settings.py", line 94, in <module>
[Mon Nov 24 18:02:29 2014] [error] [client 192.168.2.7]     SECRET_KEY = secret_key.generate_or_read_from_file(os.path.join(LOCAL_PATH, '.secret_key_store'))
[Mon Nov 24 18:02:29 2014] [error] [client 192.168.2.7]   File "/usr/lib/python2.6/site-packages/horizon/utils/secret_key.py", line 55, in generate_or_read_from_file
[Mon Nov 24 18:02:29 2014] [error] [client 192.168.2.7]     with lock:
[Mon Nov 24 18:02:29 2014] [error] [client 192.168.2.7]   File "/usr/lib/python2.6/site-packages/lockfile.py", line 223, in __enter__
[Mon Nov 24 18:02:29 2014] [error] [client 192.168.2.7]     self.acquire()
[Mon Nov 24 18:02:29 2014] [error] [client 192.168.2.7]   File "/usr/lib/python2.6/site-packages/lockfile.py", line 239, in acquire
[Mon Nov 24 18:02:29 2014] [error] [client 192.168.2.7]     raise LockFailed("failed to create %s" % self.unique_name)
[Mon Nov 24 18:02:29 2014] [error] [client 192.168.2.7] LockFailed: failed to create /usr/share/openstack-dashboard/openstack_dashboard/local/control.labs.com.Dummy-1-1605

-------------------------
/var/log/httpd/access_log
192.168.2.7 - - [24/Nov/2014:18:02:29 +0530] "GET /dashboard HTTP/1.1" 500 616 "-" "Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.65 Safari/537.36"
::1 - - [24/Nov/2014:18:04:50 +0530] "GET /dashboard HTTP/1.1" 500 609 "-" "curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 NSS/3.14.0.0 zlib/1.2.3 libidn/1.18 libssh2/1.4.2


-------------------------
[root@control ~]# openstack-status
== Nova services ==
openstack-nova-api:                     active
openstack-nova-cert:                    active
openstack-nova-compute:                 dead      (disabled on boot)
openstack-nova-network:                 dead      (disabled on boot)
openstack-nova-scheduler:               active
openstack-nova-conductor:               active
== Glance services ==
openstack-glance-api:                   active
openstack-glance-registry:              active
== Keystone service ==
openstack-keystone:                     active
== Horizon service ==
openstack-dashboard:                    500
== neutron services ==
neutron-server:                         active
neutron-dhcp-agent:                     inactive  (disabled on boot)
neutron-l3-agent:                       inactive  (disabled on boot)
neutron-metadata-agent:                 inactive  (disabled on boot)
neutron-lbaas-agent:                    inactive  (disabled on boot)
== Support services ==
mysqld:                                 active
messagebus:                             active
qpidd:                                  active
memcached:                              active
== Keystone users ==
+----------------------------------+---------+---------+------------------+
|                id                |   name  | enabled |      email       |
+----------------------------------+---------+---------+------------------+
| fe41229a46784820addebf86f473ee3b |  admin  |   True  |  admin@labs.com  |
| b6a1b46240ad455bab015b66853da06d |  glance |   True  | glance@labs.com  |
| 1c093d12448e444296b3d0217741dd4d | neutron |   True  | neutron@labs.com |
| 50c97e8a6771438b91177a047affe286 |   nova  |   True  |  nova@labs.com   |
+----------------------------------+---------+---------+------------------+
== Glance images ==
+--------------------------------------+---------------------+-------------+------------------+----------+--------+
| ID                                   | Name                | Disk Format | Container Format | Size     | Status |
+--------------------------------------+---------------------+-------------+------------------+----------+--------+
| 833f4815-e691-4ae0-af50-daf94a5298b6 | cirros-0.3 ...