VM Install using Vagrant

To develop with a Virtual Machine (VM), your computer should have at least 8GB of RAM and a 64-bit host OS. AMD-V or Intel VT-x are also required (most computers have these). Submitty is RAM and I/O intensive, so more RAM and a fast disk are better.
Enable Virtualization
Download and install VirtualBox, Vagrant, and vagrant-vbguest.

The latest Vagrant + Virtualbox combo that has been tested is Vagrant 1.9.3 and Virtualbox 5.0.38 (on Mac 10.12.6)

Below are quick steps to get everything installed and running. You can just go to the respective sites and downloaded the necessary binary (which you must do for Windows).

Mac Installation
Install homebrew if you don’t have it and then run:
```
 brew cask install virtualbox
 brew cask install vagrant
 sudo vagrant plugin install vagrant-vbguest
```
Ubuntu Installation
```
 sudo apt-get install virtualbox
 sudo apt-get install vagrant
 sudo vagrant plugin install vagrant-vbguest
```
Clone the Submitty repository to a location on your computer (the “host”).
```
git clone https://github.com/Submitty/Submitty.git
```
Navigate to that directory on your computer in a shell/terminal and type:
```
vagrant up
```
Vagrant will build your VM. This will take maybe 30 minutes to a few hours depending on your Internet connection speed. When this command finishes, your VM is ready to use.
To stop and restart the VM:
- When you are finished working, you can suspend the virtual machine (save state, a little faster to restart):
```
vagrant suspend
```
  or halt the virtual machine (complete VM shutdown, a little slower to restart):
```
vagrant halt
```
- To resume work on a VM that is suspended or halted:
```
vagrant up
```
- If you just want to restart the VM (same as halt/up), type:
```
vagrant reload
```
  If you haven’t made any drastic changes to the build script, you should be able to just re-provision the VM. You can do this by using the --provision flag with either up or reload. This is will be faster than doing a full destroy/up, however depending on the changes you’ve done to the VM, could leave it potentially unstable. If the VM breaks, simply destroy/up as normal.
  
  NOTE: when resuming work, you may see this warning several times, default: Warning: Remote connection disconnect. Retrying.. . These warnings are not harmful and can be ignored.
To completely delete the virtual machine (such as to start over from scratch with a fresh VM), type:
```
vagrant destroy
```
And if desired:
```
vagrant up
```
When the VM is “up”, you can go visit the homework submission website.
- From a web browser (Chrome, Firefox, IE, etc.) on your host computer, go to: http://192.168.56.101/index.php?semester=s17&course=sample Edit the semester and course url variables to access other courses.
- You can test the submission, autograding, and viewing of the grades details by uploading sample submissions from the Submitty repository, located in one of these these directories: https://github.com/Submitty/Tutorial/tree/master/examples (for “tutorial” course) https://github.com/Submitty/Submitty/tree/master/more_autograding_examples (for “sample” course)
- You will enter the TA grading website from grading links on the main navidation page. NOTE: Because TA grading is still through a separate top level URL, you will need to enter your password a 2nd time. This will go away when we finish the move to a combined site. (this still gives the security warning above?)
- These URLS are configured:
  - http://192.168.56.101 (submission)
  - http://192.168.56.101/cgi-bin (cgi-bin scripts)
  - http://192.168.56.101/hwgrading (ta grading)
When the VM is “up”, you can connect from your host computer to the virtual machine via ssh. Windows users will need to install SSH software (e.g., Cygwin or Putty). From a terminal in the repository directory type:
```
vagrant ssh
```
You will connect to the VM as user vagrant initially.

The following additional users exist on the VM:

user	password
vagrant	vagrant
root	vagrant
hsdbu	hsdbu
hwcgi	hwcgi
hwphp	hwphp
hwcron	hwcron
instructor	instructor
ta	ta
developer	developer
postgres	postgres
student	student

The VM has the following three courses by default and they are all part of the current semester:

_Note: The current semester is calculated by either using an s if in the month is < 7 else use f and then take the last two digits of the current year. So April 2017 would be s17 while September 2017 would be f17.
- sample
- development
- tutorial
Currently, there are four user accounts that can be used that have different permission levels within the system. Their password is the same as their username:
- developer
- instructor
- ta
- student

Developer

VM Install using Vagrant