==== Check service and restart if failed ====
Check the service if nginx is running and if not start

<code bash>
#!/usr/bin/env bash

# Enable System level logging
# Redirect log to logger
exec 1> >(logger -t $(basename $0)) 2>&1

STATUS="$(systemctl is-active nginx.service)"

if [ "${STATUS}" != "active" ]; then
   echo "Not running starting Service : Nginx"
   systemctl start nginx.service
fi
</code>

for python

<code python>
#!/usr/bin/env python3
import os
import logging
from systemd import journal

def main(serviceName):
  status = os.system('systemctl is-active --quiet ' + serviceName)
  finisher(status)

def finisher(status):
  if status is not 0:
    status = os.system('systemctl start --quiet ' + serviceName)
    print(status)
    if status is not 0:
      log.error('Failed to start: ' + serviceName)
    else:
      log.info('Started service: ' + serviceName)

if __name__ == "__main__":

  # Initialize and handle options
  log = logging.getLogger(__file__)
  log.addHandler(journal.JournaldLogHandler())
  log.setLevel(logging.INFO)

  # Define service array
  serviceName = ["nginx"]
  for service in serviceName:
    main(service)
</code>