- Use of .json files to specify machine dependent parameters

- Allow using a yum proxy when needed via yum_proxy variable (if its not 
defined it will skip the step)

- Use ansible built-in variables to reach  environmental variables

- Changed the structure of nodes,.json file

- Generates configuration files either for an arbitrary number of 
virtual machines or from a hash of hosts using a .json file

[Vagrant&credentials.yml] Encripted credentials.yml file using vault. - Vault needs a password to decrypt variables file which is given via vault_secret (must be 600 on root).

- Vagrant will look for that file via ansible.vault_password_file 
variable set in the provision block.

- Vault needs a password to decrypt variables file which is given via 
vault_secret (must be 600 on root).

- Vagrant will look for that file via ansible.vault_password_file 
variable set in the provision block.

- Use _creates_ option to check for created files and directories.
- Everything goes to root's home (~ during provision)
- If the files/folder already exist, nothing happens (idempotency)

- admin Openstack credentials loaded as environment variables in each 
play.
- admin and demo credentials have been written into .bashrc (admin iff 
EUID==0).

Avoid downloading CirrOS image if it is already present.

-r MUST be set to 1 to boot virtual machines.

- IP addres is taken using ansible_eth1.ipv4.address in each compute 
node (controller node has ip by default in credentials).

- role of each node is adresed reading its value inside Nodes.json

- GenFiles.rb creates Nodes.json with an arbitrary number of compute 
nodes (and one controller), as well as modifies hosts.j2, credentials 
and the playbook to suitably address the number of compute nodes.

- Vagrant files has changed just to use Nodes.json instead of an ad hoc 
cluster variable.

- MetaConfig folder contains templates to by filled using the ruby 
script GenFiles.rb

Ignoring playbook.yml and roles/common/templates/host.j2. Theu are 
created via GenFiles.rb

[controller/firewalld] Firewalld stopped and masked (CentOS: default ON) -OpenStack uses iptables, while CentOS by deafult enables firewalld (which is more than just a firewall) and interferes with OpenStack processes.

- InitConfig.yml contanins the play which stops and maks firewalld 
(module _systemd_)

- OSnova.yml contained a list of ports to open which is not needed 
anymore.

- OSneutron.yml restarted firealld at some point, which is not needed 
anymore.