Farmation

A website for risk and profit analysis of farms

Start up

First update the instance. Use python3 and pipenv.

pip3 install --user pipenv

Second time (or at least after the text above was written) the pipenv command was not found. The install proceeded without error -- but command was not found. The second time solution was to execute the command below.

sudo -H pip install -U pipenv

If pip3 is not found:

sudo apt install python3-pip

Get the code

git@github.ncsu.edu:vwfreeh/farmation.git

May have to create public key (ssh-keygen) and upload (.ssh/id-rsa.pub) to github.

Enter the environment (if it doesn't exist shell command will create it) and install required software.

pipenv shell
pipenv update

Before you run django on your install, you need a secret key. Best practices suggest (demand) that the key is not in the repo. Generate a key. (Here is a page.) Save it to a file and source the file as shown:

$ cat > env
export SECRET_KEY='--------------------------------------------------'
$ source ./env
$ printenv | grep KEY
SECRET_KEY=--------------------------------------------------

Finishing touches for django.

./manage.py migrate
./manage.py createsuperuser

Load crop data.

./manage loaddata fixtures/fake-cropdata.json

Run the server.

$ ./manage.py runserver &

Test it.

$ wget http://localhost:8000 -qO /dev/null
[01/Aug/2019 21:17:07] "GET / HTTP/1.1" 302 0
[01/Aug/2019 21:17:07] "GET /accounts/login/?next=/ HTTP/1.1" 200 3842
$

The home page is requires a login, so it was redirected to the login page.

Pip install error

Found on some site that your are to update pip as

python3 -m pip install --user --upgrade pip

Don't do that. Causes the following error.

$ pip3
Traceback (most recent call last):
  File "/usr/bin/pip3", line 9, in <module>
    from pip import main
ImportError: cannot import name 'main'

If that happens, unupgrade:

python3 -m pip uninstall pip

Gunicorn + Nginx

pipenv install gunicorn
sudo apt-get install -y nginx

Edit gunicorn config file

cat /etc/systemd/system/gunicorn.service 
[Unit]
Description=gunicorn daemon
After=network.target

[Service]
User=root
Group=www-data
WorkingDirectory=/home/vwfreeh/farmation
ExecStart=/home/vwfreeh/farmation/gunicorn.sh

[Install]
WantedBy=multi-user.target

Create directory for gunicorn: sudo mkdir /run/gunicorn

Change permissions: chmod +x gunicorn.sh

Edit nginx config file.

Edit iptables

The command below opens the firewall on VCL.

sudo iptables -I INPUT 9 -i eth1 -p tcp --dport 80 -m state --state NEW,ESTABLISHED -j ACCEPT

Check connection.

sudo iptables -nvL

Should see a line similar to:

    0     0 ACCEPT     tcp  --  eth1   *       0.0.0.0/0            0.0.0.0/0            tcp dpt:80 state NEW,ESTABLISHED