selfprivacy-rest-api/selfprivacy_api/services/generic_status_getter.py

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"""Generic service status fetcher using systemctl"""
import subprocess
from selfprivacy_api.services.service import ServiceStatus
def get_service_status(service: str) -> ServiceStatus:
"""
Return service status from systemd.
Use systemctl show to get the status of a service.
Get ActiveState from the output.
"""
service_status = subprocess.check_output(["systemctl", "show", service])
if b"LoadState=not-found" in service_status:
return ServiceStatus.OFF
if b"ActiveState=active" in service_status:
return ServiceStatus.ACTIVE
if b"ActiveState=inactive" in service_status:
return ServiceStatus.INACTIVE
if b"ActiveState=activating" in service_status:
return ServiceStatus.ACTIVATING
if b"ActiveState=deactivating" in service_status:
return ServiceStatus.DEACTIVATING
if b"ActiveState=failed" in service_status:
return ServiceStatus.FAILED
if b"ActiveState=reloading" in service_status:
return ServiceStatus.RELOADING
return ServiceStatus.OFF
def get_service_status_from_several_units(services: list[str]) -> ServiceStatus:
"""
Fetch all service statuses for all services and return the worst status.
Statuses from worst to best:
- OFF
- FAILED
- RELOADING
- ACTIVATING
- DEACTIVATING
- INACTIVE
- ACTIVE
"""
service_statuses = []
for service in services:
service_statuses.append(get_service_status(service))
if ServiceStatus.OFF in service_statuses:
return ServiceStatus.OFF
if ServiceStatus.FAILED in service_statuses:
return ServiceStatus.FAILED
if ServiceStatus.RELOADING in service_statuses:
return ServiceStatus.RELOADING
if ServiceStatus.ACTIVATING in service_statuses:
return ServiceStatus.ACTIVATING
if ServiceStatus.DEACTIVATING in service_statuses:
return ServiceStatus.DEACTIVATING
if ServiceStatus.INACTIVE in service_statuses:
return ServiceStatus.INACTIVE
if ServiceStatus.ACTIVE in service_statuses:
return ServiceStatus.ACTIVE
return ServiceStatus.OFF