Own check for monitoring total disk usage of a host not working

Thank you again for you fast reply.

I edited the script like you suggested, but there is still no service check appearing.
It looks like this now:

from .agent_based_api.v1 import *

def discover_filesystem_df_total(section):
yield Service(item=“Filesystem total”)

register.check_plugin(
name=“filesystem_df_total”,
service_name=“%s”,
discovery_function=discover_filesystem_df_total,
check_function=check_Filesystem_df_total,
)

def parse_filesystem_df_total(string_table):
section = string_table
return section if section else None

register.agent_section(
name = ‘_filesystem_df_total’,
parse_function = parse_filesystem_df_total,
)