Python module for native access to the systemd facilities in recent versions of Fedora and other distributions. In particular, this capability includes passing key/value pairs as fields that the journal can display and use for filtering. There are also utilities to forward journal entries to aggregators like Graylog2 via GELF.
On Fedora 17+ with Python 2:
sudo yum install git python-pip gcc python-devel systemd-devel
pip-python install git+http://github.com/systemd/python-systemd.git#egg=systemd
On Fedora 17+ with Python 3:
sudo yum install git python3-pip gcc python3-devel systemd-devel
pip-python3 install git+http://github.com/systemd/python-systemd.git#egg=systemd
Quick example:
from systemd import journal
journal.send('Hello world')
journal.send('Hello, again, world', FIELD2='Greetings!', FIELD3='Guten tag')
journal.send('Binary message', BINARY=b'\xde\xad\xbe\xef')
There is one required argument -- the message, and additional fields can be specified as keyword arguments. Following the journald API, all names are uppercase.
The journald sendv call can also be accessed directly:
from systemd import journal
journal.sendv('MESSAGE=Hello world')
journal.sendv('MESSAGE=Hello, again, world', 'FIELD2=Greetings!',
'FIELD3=Guten tag')
journal.sendv('MESSAGE=Binary message', b'BINARY=\xde\xad\xbe\xef')
The two examples should give the same results in the log.
Notes:
- Unlike the native C version of journald's sd_journal_send(), printf-style substitution is not supported. Perform any substitution using Python's % operator or .format() capabilities first.
- A ValueError is thrown is thrown if sd_journald_sendv() results in an error. This might happen if there are no arguments or one of them is invalid.
Quick way to view output with all fields as it comes in:
sudo journalctl -f --output=json
python setup.py build
cd builds/lib.*
python
>>> from systemd import journal
>>> journal.send("Test")