Merge pull request #38 from trailofbits/ec2-doc-update

EC2 doc updates

README.md

@@ -33,8 +33,14 @@ Algo (short for "Al Gore", the **V**ice **P**resident of **N**etworks everywhere
 * Open the file `config.cfg` in your favorite text editor. Change `server_name` and specify users in the `users` list.
 * Start the deploy and follow the instructions: 
 ```
-ansible-playbook deploy.yml
+ansible-playbook deploy.yml -e "provider=PROVIDER"
 ```
+
+Available providers:
+	digiocean - Digital Ocean
+	ec2				- Amazon AWS EC2 (see EC2 section below)
+
+
 * When the process is done, you can find `.mobileconfig` files and certificates in the `configs` directory. Send the `.mobileconfig` profile to your users on iOS or macOS (note: Profile installation is supported over AirDrop) or send the X.509 certificates to those using other clients, like Windows or Android.
 * When the deploy proccess is done a new server will be placed in the local inventory file `inventory_users`.
 * If you want to add or delete users, update the `users` list in `config.cfg` and run the playbook `users.yml`. This command will update users on all the servers in the file `inventory_users`. If you want to limit servers it updates, you can use `-l` flag.
@@ -43,6 +49,21 @@ ansible-playbook users.yml -i inventory_users
 ansible-playbook users.yml -i inventory_users -l example.com
 ```
 
+### EC2
+#### Deployment
+
+Before using the AWS EC2 playbook you must setup ENV vars with your credentials.
+```
+declare -x AWS_ACCESS_KEY_ID="XXXXXXXXXXXXXXXXXXX"
+declare -x AWS_SECRET_ACCESS_KEY="XXXXXXXXXXXXXXXxx"
+```
+#### User management
+
+User management for EC2 currently uses Algo's inventory_users NOT EC2 dynamic inventory. This may be subject to change in the future.
+```
+ansible-playbook users.yml -u ubuntu -i inventory_users
+```
+
 ## FAQ
 
 ### Has this been audited?