extend README to use roles

README.md

@@ -73,6 +73,86 @@ Ansible scripts are organized into roles. The roles used by Algo are described i
 * SHell or BASH
 * libselinux-python (for RedHat based distros)
 
+### Roles and Tags
+**Cloud roles:**  
+- role: cloud-digitalocean, tags: digitalocean
+- role: cloud-ec2, tags: ec2  
+- role: cloud-gce, tags: gce  
+
+**Server roles:**  
+- role: vpn, tags: vpn 
+- role: dns_adblocking, tags: dns, adblock
+- role: proxy, tags: proxy, adblock 
+- role: logging, tags: logging
+- role: security, tags: security
+- role: ssh_tunneling, tags: ssh_tunneling
+
+### Cloud Providers
+
+**digitalocean**  
+*Requirement variables:*  
+- do_access_token  
+- do_ssh_name  
+- do_server_name  
+- do_region
+
+*Possible regions:*  
+- ams2
+- ams3
+- fra1
+- lon1
+- nyc1
+- nyc2
+- nyc3
+- sfo1
+- sfo2
+- sgp1
+- tor1
+- blr1
+
+**gce**  
+*Requirement variables:*  
+- credentials_file
+- server_name
+- ssh_public_key
+- zone
+
+*Possible zones:*  
+- us-central1-a
+- us-central1-b
+- us-central1-c
+- us-central1-f
+- us-east1-b
+- us-east1-c
+- us-east1-d
+- europe-west1-b
+- europe-west1-c
+- europe-west1-d
+- asia-east1-a
+- asia-east1-b
+- asia-east1-c
+
+**ec2**  
+*Requirement variables:*  
+- aws_access_key
+- aws_secret_key
+- aws_server_name
+- ssh_public_key
+- region
+
+*Possible regions:*  
+- us-east-1
+- us-west-1
+- us-west-2
+- ap-south-1
+- ap-northeast-2
+- ap-southeast-1
+- ap-southeast-2
+- ap-northeast-1
+- eu-central-1
+- eu-west-1
+- sa-east-1
+
 ### Cloud Deployment
 
 To install the dependencies on OS X or Linux:
@@ -84,10 +164,11 @@ sudo pip install -r requirements.txt
 
 Open the file `config.cfg` in your favorite text editor. Specify the users you wish to create in the `users` list.
 
-Start the deploy and follow the instructions:
+Start the deploy with extra variables and tags that you need.  
+Example for DigitalOcean:
 
 ```
-./algo
+ansible-playbook deploy.yml -t digitalocean,vpn -e 'do_access_token=secret_token do_ssh_name=my_ssh_key do_server_name=algo.local do_region=ams2'
 ```
 
 When the process is done, you can find `.mobileconfig` files and certificates in the `configs` directory. Send the `.mobileconfig` profile to users with Apple devices. Note that profile installation is supported over AirDrop. Do not send the mobileconfig file over plaintext (e.g., e-mail) since it contains the keys to access the VPN. For those using other clients, like Windows or Android, securely send them the X.509 certificates for the server and their user.