Installing Nemo,

[Salem Akid]

Hi everyone, 

  I am trying to install Nemo on my Ubuntu server, which is installed on a laptop. Trying to gain some hands-on experience before implementing it in a pilot project. I'm not a developer, I'm more of an IT architect and infrastructure. I have already installed Nemo on my standalone server (not part of a domain). The installation did not involve configuring LDAP or SSL, and I followed the steps I documented during the installation. Although the I was able to make it works, it was not straightforward and required considerable troubleshooting, which I did not include in my documented steps.  I don't yet feel comfortable moving forward with the pilot implementation .

Could you please review these steps and advise if there is a way to refine them?, or if you have any other high-level implementation steps I could follow?

1- sudo apt update && sudo apt upgrade -y

2- sudo apt install -y python3 python3-pip python3-venv git postgresql postgresql-contrib nginx

3- sudo -u postgres psql

4- Created db and user

5- git clone https://github.com/usnistgov/NEMO.git
6- python3 -m venv venv
7-source venv/bin/activate

8- pip install --upgrade pip

 9- Update the db in settings.py

database:

10- update the static path in settings.py

11- updated the db user permission:

ALTER SCHEMA public OWNER TO sql user;

ALTER SCHEMA public OWNER TO sql user;

 12- install the following packages: 

sudo pip install django-filter --break-system-packages

sudo pip install django-mptt --break-system-packages

pip install django-mptt
pip install django-auditlog

pip install packaging

pip install drf-excel

pip install drf-flex-fields

pip install ldap3

pip install pymodbus

 

13- run python3 manage.py migrate

14- python manage.py createsuperuser

15-pip install gunicorn

gunicorn --workers 3 --bind 127.0.0.1:8001 NEMO.wsgi:application

 16- sudo nano /etc/nginx/sites-available/nemo

server {
    listen 80;
    server_name localhost;

    location = /favicon.ico { access_log off; log_not_found off; }
    location /static/ {
        alias /home/nemo/NEMO/static/;
    }

    location / {
        proxy_pass http://127.0.0.1:8001;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
    }
}

 

18- sudo ln -s /etc/nginx/sites-available/nemo /etc/nginx/sites-enabled/

'

Your help will be highly appreciated it 

 

[mathieu...@gmail.com]

Hi,

I would definitely look at using the docker image and not installing it from pip yourself.

https://github.com/usnistgov/NEMO/wiki/Installation-with-Docker

or even better with docker-compose:

https://github.com/usnistgov/NEMO/wiki/Docker-Compose-installation

Then with docker compose you can add a service with postgres as well, and use an init script to create the database and user:
CREATE USER nemo WITH ENCRYPTED PASSWORD '<password>';
ALTER ROLE nemo SET client_encoding TO 'utf8';
ALTER ROLE nemo SET default_transaction_isolation TO 'read committed';
ALTER ROLE nemo SET timezone TO 'UTC';
CREATE DATABASE nemo OWNER nemo;

You might have to read some docs about docker and containers etc.

Good luck,

Mathieu

[Salem Akid]

  Thank you, Mathieu, for the advice. I tried using a Docker image, and everything went well. However, I got stuck at the end with the login credentials. I created a superuser, but it was created without a password, and I wasn't able to login. 

[mathieu...@gmail.com]

Right, NEMO doesn't do authentication itself so there are no passwords stored in NEMO.

With docker/docker-compose, you can force the username in nginx (for testing purposes) using the following:

in settings.py:

1. make sure you have 'NEMO.middleware.HTTPHeaderAuthenticationMiddleware', in the list of middlewares.
2. use AUTHENTICATION_BACKENDS = ['NEMO.views.authentication.RemoteUserAuthenticationBackend']
3. use AUTHENTICATION_HEADER = "AUTHORIZATION"

in nginx.conf:

• use "proxy_set_header Authorization <your_username>;"

in production you want to set up nginx for shibboleth or kerberos and use the remote-user to send the username to NEMO, or use the NEMO-allauth plugin to connect to a supported provider, or use LDAP.

[Salem Akid]

Thank you again for helpful detail🙏, I did address these three lines for on my settings.py then I got another Authentication error on my browser. Maybe I did something wrong, I’ll try again.