#!/usr/bin/env python3

from subprocess import check_output


WARN_AT=80
CRITICAL_AT=90
output = []
exitcode = 0

for line in check_output(['/usr/sbin/zpool', 'list', '-Hpo', 'name,size,alloc']).decode().splitlines():
    pool, size, alloc = line.split('\t')
    used_percent = int(int(alloc)/int(size)*100)

    if used_percent > CRITICAL_AT:
        exitcode = max(exitcode, 2)
    elif used_percent > WARN_AT:
        exitcode = max(exitcode, 1)

    if used_percent > WARN_AT:
        output.append(
            f'{pool} is {used_percent}% full'
        )

print('\n'.join(output))
exit(exitcode)