central-automation-studio

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central-automation-studio

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A graphical user interface web application to run API based automation workflows in Aruba Central

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# Central Automation Studio (CAS)

Central Automation Studio uses a Docker container to provide a portable, customizable platform for users to explore Central APIs.

Central Automation Studio is a Dockerization of Aaron Scott's Central Automation platform (https://central.wifidownunder.com). 
Source code by Aaron Scott at https://central.wifidownunder.com/source 
See https://central.wifidownunder.com/documentation.html

### Table of Contents
[Instructions for Use (MacOS/ Linux)](#instructions-linux) 
[Instructions for Use (Windows)](#instructions-windows) 
[Dependencies](#dependencies) 
[Image Versions](#images) 
[Useful Commands for Development](#development) 
[Architecture](#architecture) 
[Container Structure](#container-structure) 
[Important Files](#files) 
[Notes/ Issues](#notes)

### <a name="instructions-linux"> Instructions for Use (MacOS/ Linux) </a>
Note: Using WSL has not been tested. 
1. Install Docker: https://docs.docker.com/get-docker/

2. Pull the image: 
 `sudo docker pull arubahpe/central-automation-studio`

3. Start a container using the image you just built. 
 - With HTTP 
 `sudo docker run -it --rm --name containerName -p <port-number>:80 -e API_URL="http://<ip-address>:<port-number>/backend" -e SECURE="False" arubahpe/central-automation-studio`

For example: 
 `sudo docker run -it --rm --name myContainer -p 5001:80 -e API_URL="http://192.168.1.200:5001/backend" -e SECURE="False" arubahpe/central-automation-studio`

View your container at the specified IP address, ex: http://192.168.1.200:5001/

- With HTTPS/ SSL enabled. Note that <path-to-ssl-key> and <path-to-ssl-certificate> need to be provided by the user, and are the file paths of the key and certificate, respectively. 
 `sudo docker run -it --rm --name containerName -p 443:443 -e API_URL="https://<ip-address-or-fqdn>/backend" -e SECURE="True" -v <path-to-ssl-key>:/usr/local/apache2/conf/apache-private.key -v <path-to-ssl-certificate>:/usr/local/apache2/conf/apache-cert.crt arubahpe/central-automation-studio`

For example: 
 `sudo docker run -it --rm --name myContainer -p 443:443 -e API_URL="https://192.168.1.200/backend" -e Verify="True" -e SECURE="True" -v /etc/ssl/private/apache-selfsigned.key:/usr/local/apache2/conf/apache-private.key -v /etc/ssl/certs/apache-selfsigned.crt:/usr/local/apache2/conf/apache-cert.crt arubahpe/central-automation-studio`

View your container at the specified IP address or FQDN (Fully Qualified Domain Name), ex: https://192.168.1.200/ 
 For an example of how to quickly set up a self-signed certificate, see **Step 1** of this article: https://www.digitalocean.com/community/tutorials/how-to-create-a-self-signed-ssl-certificate-for-apache-in-ubuntu-16-04. The Common Name should match the IP address in API_URL. Note that if you use a self-signed certificate, you may see an error message; click "Advanced" and proceed anyway.

- Environment variables 
 The "-e" flag sets an environment variable. There are two environment variables that need to be set: 
 **API_URL**: Set this to the URL of your backend server. 
 **SECURE**: Set this to "True" if you want to enable SSL and use HTTPS, otherwise set it to "False". 
 One optional environment variable that can be set: 
 **VERIFY**: Set this to "False" if you want to skip verification of SSL certificate on the Central cluster, otherwise set it to "True".

3. If you want to stop your container: 
 `sudo docker stop containerName` 
 
 The --rm flag means that your container will be removed when it is stopped; if you would like continue running the same exact container, remove the --rm flag.

### <a name="instructions-windows"> Instructions for Use (Windows) </a>
Note: Using WSL has not been tested. 
1. Install Docker: https://docs.docker.com/get-docker/.

2. Pull the image: 
 `docker pull arubahpe/central-automation-studio`

3. Start a container using the image you just pulled. 
 - With HTTP 
 `docker run -it --rm --name containerName -p <port-number>:80 -e API_URL="http://<ip-address>:<port-number>/backend" -e Verify="True" -e SECURE="False" arubahpe/central-automation-studio`

For example: 
 `docker run -it --rm --name myContainer -p 5001:80 -e API_URL="http://192.168.1.200:5001/backend" -e Verify="True" -e SECURE="False" arubahpe/central-automation-studio`

View your container at the specified IP address, ex: http://192.168.1.200:5001/. The --rm flag means that your container will be removed when it is stopped; if you would like continue running the same exact container, remove the --rm flag.

- Environment variables 
 The "-e" flag sets an environment variable. There are two environment variables that need to be set: 
 **API_URL**: Set this to the URL of your backend server. 
 **SECURE**: Set this to "True" if you want to enable SSL and use HTTPS, otherwise set it to "False". 
 One optional environment variable that can be set: 
 **VERIFY**: Set this to "False" if you want to skip verification of SSL certificate on the Central cluster, otherwise set it to "True".

3. If you want to stop your container: 
 `sudo docker stop containerName`

-----------------------------------------------------

### <a name="dependencies"> Dependencies </a>
API: Python, Flask, Flask-CORS, Gunicorn

### <a name="development"> Useful Commands for Development </a>

Clone the repo here: `git clone https://github.com/aruba/central-automation-studio.git`

To build an image from scratch: 
`sudo docker build --no-cache -t imageRepo .` 
NOTE: On Windows, you will need to change the line endings ___before___ you build the image. Find the file central-automation-studio/start.sh and change the line endings from CRLF (Windows) to LF (Unix). You can do this with a text editor. 
 Sublime: View -> Line Endings -> Unix 
 Notepad++: Edit -> EOL Conversion -> Unix (LF) 
 Visual Studio Code: See the bottom right corner -> CRLF -> LF

To run a new interactive container (accessible through bash) that is automatically removed when stopped: 
`sudo docker run --name containerName -it --rm --entrypoint "" imageRepo tail -f /dev/null`

To access a container's terminal: 
`sudo docker exec -it containerName /bin/bash`

### <a name="architecture"> Architecture </a>
UI (Apache) <----> API Proxy (Gunicorn) <----> Aruba Central 
See https://central.wifidownunder.com/documentation.html#architecture-row

### <a name="container-structure"> Container Structure </a>
/central 
&nbsp;&nbsp;&nbsp;&nbsp; |----/API 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |----set_env.py: sets environment variables 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |----start.sh: bash script that starts frontend and backend servers 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |----timed_test.log: rotating error log 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |----api.py 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |----wsgi.py 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |----/api 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |----/static 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |----/templates 
&nbsp;&nbsp;&nbsp;&nbsp; |----/UI 
&nbsp;&nbsp;&nbsp;&nbsp; |----/apacheconfig 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |----apache_main.conf: main Apache configuration 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |----apache_main_ssl.conf: main Apache configuration with SSL enabled 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |----apache_ssl.conf: specific SSL configuration for Apache 
/usr/local/apache2/ 
&nbsp;&nbsp;&nbsp;&nbsp; |----/htdocs/ UI code is located here 
&nbsp;&nbsp;&nbsp;&nbsp; |----/conf/ If SSL is enabled, the certificate and key are placed here.

### <a name="files"> Important files </a>
- UI/assets/js/main.js:32 is where the api_url/ location of backend server is defined.
- set_env.py sets the environment variables API_URL and SECURE
- API/api.py is where the error log is created
- apache_main.conf contains the Apache reverse proxy config
- apache_main_ssl.conf and apache_ssl.conf contain the Apache reverse proxy config + SSL enablement.
- start.sh starts the Gunicorn server in the background, and the Apache server in the foreground

### <a name="notes"> Notes /Issues </a>
- UI/assets/js/main.js: Copyright symbol was removed due to encoding issues when trying to read the file in set_env.py
- Some issues on Windows PC, so for now just use http instead of https: `RUN sed -i 's/https/http/' /etc/apk/repositories` (put this before `apk update`)
- To run on Windows, change the line endings in start.sh from CRLF to LF before building the image
- Setting up HTTPS for Windows? "Invalid mode" when volume mounting SSL certificate and key, using OpenSSL on Windows

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