Verifying if odoo (or any process) is running.

check_odoo.py

import subprocess

try:
    resultado = subprocess.check_output("sudo systemctl status odoo12 | grep 'Active: failed'", shell=True)
    if "Active: failed" in resultado:
        subprocess.check_output("sudo systemctl stop odoo12", shell=True)
        subprocess.check_output("sudo systemctl start odoo12", shell=True)
        print("activado 1")
    else:
        resultado = subprocess.check_output("sudo systemctl status odoo12 | grep inactive", shell=True)
        if "inactive" in resultado:
            subprocess.check_output("sudo systemctl stop odoo12", shell=True)
            subprocess.check_output("sudo systemctl start odoo12", shell=True)
            print("activado 2")
except Exception as e:
    print(e