Simple API to automate the creation of custom daemons for GNU/Linux.
A daemon is a service process that runs in the background and supervises the system or provides functionality to other processes. Traditionally, daemons are implemented following a scheme originating in SysV Unix. Modern daemons should follow a simpler yet more powerful scheme, as implemented by systemd.
Systemd-Service is a Python module to automate the creation of daemons under GNU/Linux environments.
pip install -U systemd-servicefrom systemd_service import Service
daemon = Service("stream_rpyc")
daemon.stop() # Start (activate) the unit.
daemon.start() # Stop (deactivate) the unit.
daemon.reload() # Reload the unit.
daemon.restart() # Start or restart the unit.
daemon.enable() # Enable the unit.
daemon.disable() # Disable the unit.
daemon.remove() # Remove the file unit.This commands are uquivalent to the systemctl calls, for example run in terminal the folowing command:
$ systemctl enable stream_rpyc
Can be running inside a Python environment with using systemd_service
from systemd_service import Service
daemon = Service("stream_rpyc")
daemon.enable()Similar to the previous scripts, the services can be created using systemd_service:
daemon = Service("stream_rpyc")
daemon.create_service()If the service must be initialized after other service
daemon = Service("stream_rpyc")
daemon.create_service(after='ntpd')Defines a timer relative to when the machine was booted up:
daemon = Service("stream_rpyc")
daemon.create_timer(on_boot_sec=15)This module is useful when is combined with package scripts declaration in setup.py file:
# setup.py
scripts=[
"cmd/stream_rpyc",
]The script could looks like:
#!/usr/bin/env python
import sys
if sys.argv[-1] == "systemd":
from systemd_service import Service
daemon = Service("stream_rpyc")
daemon.create_timer(on_boot_sec=10, after='network.target kafka.service')
else:
from my_module.submodule import my_service
print("Run 'stream_rpyc systemd' as superuser to create the daemon.")
my_service()Then the command can be called as a simple script but with the systemd argument the command will turn into a service.
$ stream_rpyc
# Command executed normally$ stream_rpyc systemd
# Service created
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