Following the open stack manual http://docs.openstack.org/training-gu... ... .. My SQL database is created using the

# mysql -u root -p
mysql>CREATE DATABASE keystone;
mysql>GRANT ALL ON keystone.* TO 'keystoneUser'@'%' IDENTIFIED BY 'keystonePass';

Subsequent to this the following keystone install steps are done:

# apt-get install -y keystone

Updated the keystone config file /etc/keystone/keystone.conf with below line..

connection = mysql://keystoneUser:keystonePass@10.10.10.51/keystone

# service keystone restart
# keystone-manage db_sync

Then the below error is displayed:

...13:55:10.059 19186 CRITICAL keystone [-] OperationalError: (OperationalError) (2003, "Can't connect to MySQL Server on '10.10.10.51' (110)" None None
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Can anybody throw some light on how to fix the above error please?