Lente Demo

Lente is the dashboard and backend processing database program.

The backend processor is a postgres Docker container, and it needs to be running before Lente can be started.

Sistemi Lente/Prism programs are deployed as Docker containers, which allows the programs to run in a virtual environment, and be independent of your host operating system. This means, for example, that you don’t have to worry about python packages, versions of modules, etc

Requirements

  • Operating System

    • The system was developed on both Windows 10 and Ubuntu 18.04

    • Most testing occurs on Ubuntu given its the expected OS used in the factory because of cost (its free)

    • All these instructions are for Ubuntu 22.04

  • Outside Software Requirements

Postgres

Lente needs a postgresql backend to be running in order to work, which will be installed first. Instructions for setting up Postgres on Ubuntu are given as an example.

$ sudo apt install postgresql postgresql-contrib
$ sudo systemctl start postgresql.service
$ sudo -u postgres psql
psql (14.7 (Ubuntu 14.7-0ubuntu0.22.04.1))
Type "help" for help.

postgres=# ALTER USER postgres PASSWORD 'qwerty';
ALTER ROLE
postgres=# \q
$ sudo -u postgres createdb resultbasekeysv1

Note that the postgres service is not enabled, only started. If you want the service to start every time the computer is booted, also run,

$ sudo systemctl enable postgresql.service

Clone Sistemi Scripts

  • If you are using the same computer for Lente as you did for Prism and have already cloned scripts from the Prism instructions, you do not need to do this again here.

  • There is a prescriptive directory structure to use, and that is stored on github in a project called scripts

  • This github repo is where you would ultimately store and version control your own scripts

    • Instead of cloning the repo, you would fork the scripts repo (copy it), making it your own, and then add your own code

  • The instructions below will create a folder called git/scripts which git will copy the required files into

  • If this is a Lente deployment, on a dedicated computer, then you want to clone the scripts repo you created.

  • Clone scripts:

    mkdir ~/git
cd ~/git
git clone https://github.com/sistemicorp/scripts.git

  • the Lente Docker container must be pulled from docker hub

docker pull sistemicorp/lente

  • Run Lente:

    cd ~/git/scripts/public
./lente.sh start

  • Open Google Chrome to

    • Note on slower computers, it may take 5-15 seconds for the Lente window to display

    • Lente login user/password is admin@here.com/password

    • Other users passwords are password