Demonstration of logging to systemd journal with offcial Python bindings, and cysystemd

systemd_journal_demo.py

#!/usr/bin/env python3

import logging

log = logging.getLogger('systemd_demo')
log.setLevel(logging.DEBUG)


# Official bindings
import systemd.journal

systemd.journal.send(
    "Hello systemd",
    PRIORITY=systemd.journal.LOG_DEBUG,
    SYSLOG_IDENTIFIER='systemd_demo',
    )
handler = systemd.journal.JournalHandler(SYSLOG_IDENTIFIER='systemd_demo')
log.addHandler(handler)
log.debug('Hello systemd through logging framework')
log.removeHandler(handler)
handler.close()


# Cython bindings, by mosquito
import cysystemd.journal

cysystemd.journal.send(
    message="Hello cysystemd",
    priority=int(cysystemd.journal.Priority.DEBUG),
    syslog_identifier='systemd_demo',
    )
handler = cysystemd.journal.JournaldLogHandler(identifier='systemd_demo')
log.addHandler(handler)
log.debug('Hello cysystemd through logging framework')
log.removeHandler(handler)
handler.close()

:~/src$ journalctl --identifier=systemd_demo
-- Logs begin at Fri 2020-05-15 13:14:09 BST, end at Tue 2021-06-15 21:42:56 BST. --
Jun 15 21:41:31 martha systemd_demo[234175]: Hello systemd
Jun 15 21:41:31 martha systemd_demo[234175]: Hello systemd through logging framework
Jun 15 21:41:31 martha systemd_demo[234175]: Hello cysystemd
Jun 15 21:41:31 martha systemd_demo[234175]: Hello cysystemd through logging framework