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deploy_aws.md

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Deployment

Here we explain how to deploy the webpage on an amazon AWS server.

Launch Instance

Go to https://console.aws.amazon.com/ec2/, click Launch Instance, choose Ubuntu Server 16.04 LTS (HVM), then t2.micro. Now Edit Security Groups, add SSH and HTTP with Source Anywhere. Download the provided private key. The name of our private key file is firstkeypair.pem. We need to change its permission:

chmod 400 firstkeypair.pem

SSH to the server

Our Public DNS is ec2-52-15-239-252.us-east-2.compute.amazonaws.com. Thus, we can ssh to this machine using the command

ssh -i "firstkeypair.pem" ubuntu@ec2-52-15-239-252.us-east-2.compute.amazonaws.com

Install Python 3, pip, and Apache

sudo apt-get update
sudo apt install python3
sudo apt-get install python3-pip
sudo pip3 install --upgrade pip
sudo apt-get install apache2
sudo apt-get install libapache2-mod-wsgi-py3

Install the required packages

sudo pip3 install flask
sudo pip3 install networkx
sudo apt-get install graphviz libgraphviz-dev graphviz-dev pkg-config
sudo pip3 install pygraphviz --install-option="--include-path=/usr/include/graphviz" --install-option="--library-path=/usr/lib/graphviz/"

Download Code

sudo apt install git
git clone https://github.com/alexanderskulikov/greedy-superstring-conjecture.git

Setup Flask

sudo ln -sT ~/greedy-superstring-conjecture/web /var/www/html/web
sudo vim /etc/apache2/sites-enabled/000-default.conf

After the line DocumentRoot /var/www/html, add the following block:

WSGIDaemonProcess flaskapp threads=5
WSGIScriptAlias / /var/www/html/web/flaskapp.wsgi

<Directory flaskapp>
    WSGIProcessGroup flaskapp
    WSGIApplicationGroup %{GLOBAL}
    Order deny,allow
    Allow from all
</Directory>

Now run the command

sudo apachectl restart

Write Permissions

sudo chmod -R a+w greedy-superstring-conjecture/web/static/logs/
sudo chmod -R a+w greedy-superstring-conjecture/web/static/output/

Testing

Open in your browser the page http://ec2-52-15-239-252.us-east-2.compute.amazonaws.com/scs

You can find Apache's logs here:

/var/log/apache2/error.log

In order to restart Apache, run:

sudo apachectl restart

Logs, History and Exceptions

ssh -i "firstkeypair.pem" ubuntu@ec2-52-15-239-252.us-east-2.compute.amazonaws.com

Here are the outputs: greedy-superstring-conjecture/web/static/output/

Here is the history: greedy-superstring-conjecture/web/static/logs/history/

Here is the list of exceptions: greedy-superstring-conjecture/web/static/logs/exceptions.txt

Here is the list of counter-examples: greedy-superstring-conjecture/web/static/logs/counter-examples.txt