Centos 7 Monitor Directory With Python3

Description:

So the other day, I wrote a post about using the open source version of pwsh to monitor a path, but today I wanted to convert that over to python3. Here is how I did it:

To Resolve:

1. Following this guide I installed python 3 on my RHEL 7 box by running:

   subscription-manager repos --enable rhel-7-server-optional-rpms \
   --enable rhel-server-rhscl-7-rpms
   yum -y install @development
   yum -y install rh-python36
   

2. Next, I copied over my monitorcsv.py that I have been building in vscode:

   cd /myuser/scripts
   mkdir csv
   cd csv
   scl enable rh-python36 bash
   python -m venv /myuser/scripts/csv/venv
   source /myuser/scripts/csv/venv/bin/activate
   pip install --upgrade pip
   python3 -m pip install requests
   python3 -m pip install python-dotenv
   vi monitorcsv.py
   #paste in script
   chmod 700 monitorcsv.py
   exit
   

3. Next, I created a caller bash script:

   vi /myuser/scripts/monitorcsv.sh
   # paste in:
   #!/bin/bash
   scl enable rh-python36 bash
   source /myuser/scripts/csv/venv/bin/activate
   python /myuser/scripts/csv/monitorcsv.py
   chmod 700 csv.sh
   

4. Create an .env file for python to load environmental variables within the env:

   EMAIL="somePass"
   KEY="someKey"
   

   • Make sure to add at top of your python script:

   from dotenv import load_dotenv
   
   load_dotenv()
   

5. Now just update your service file to point to /myuser/scripts/monitorcsv.sh instead. Ensure you do a systemctl daemon-reload followed by systemctl restart yourservice.path and systemctl restart yourservice for changes to take effect.