Df check

check_df.py

#!/usr/bin/python

"""
Script that checks to see that disk usage is below a certain threshold.
Designed to be invoked by cron.
"""

from sh import df
import re

UHOH_THRESHOLD = 90  # percentage usage that triggers an alarm


def find_root_usage():
    """Return percentage of disk usage at mountpoint / as an int."""
    root_line = df('/').stdout.split('\n')[-1]
    match = re.search(r'(\d+)%', root_line)

    return int(match.group(1))


usage_perc = find_root_usage()

if usage_perc >= UHOH_THRESHOLD:
    print "Usage of / is %d percent." % usage_perc