Openstack-Keystone failing to start

If openstack-Keystone is not starting:

for eg:

 [root@* keystone]# service openstack-keystone restart

Stopping keystone:                                         [FAILED]
Starting keystone:                                         [  OK  ]
[root@* keystone]# service openstack-keystone restart
Stopping keystone:                                         [FAILED]
Starting keystone:                                         [  OK  ]

Try running keystone manually instead of as a service:

$ sudo -u keystone bash
$ HOME=/var/lib/keystone keystone-all --debug

PHP-FPM Listen On Unix Socket-Ubuntu 12.04

In the default configuration  PHP FPM is set to listen on TCP port 9000 on address 127.0.0.1. This can be changed in /etc/php5/fpm/pool.d/www.conf Edit the line " listen = 127.0.0.1:9000" and change it to something like             listen = /var/run/php5-fpm.sock.  *you can choose different location if required Make sure that file php5-fpm.sock is created automatically in "/var/run ". Dont create this file manually. Edit Nginx configs to tell it to pass requests through the unix socket rather than TCP. For that create a file at /etc/nginx/conf.d/ named php5-fpm.conf: upstream php5-fpm-sock { server unix:/var/run/php5-fpm.sock; }   After doing so, restart PHP FPM:  sudo /etc/init.d/php5-fpm restart