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import os
import shutil
from leapp import reporting
from leapp.actors import Actor
from leapp.exceptions import StopActorExecutionError
from leapp.libraries.stdlib import api
from leapp.reporting import create_report, Report
from leapp.tags import FinalizationPhaseTag, IPUWorkflowTag
class CreateSystemdResumeService(Actor):
"""
Add a systemd service to launch Leapp.
Create a systemd service which will resume Leapp upgrade after the first reboot.
"""
name = 'create_systemd_service'
consumes = ()
produces = (Report,)
tags = (FinalizationPhaseTag, IPUWorkflowTag)
def process(self):
service_name = 'leapp_resume.service'
systemd_dir = '/etc/systemd/system'
service_templ_fpath = self.get_file_path(service_name)
shutil.copyfile(service_templ_fpath, os.path.join(systemd_dir, service_name))
service_path = '/etc/systemd/system/{}'.format(service_name)
symlink_path = '/etc/systemd/system/default.target.wants/{}'.format(service_name)
# in case nothing is enabled in the default target, the directory does not exist
try:
os.mkdir(os.path.join(systemd_dir, 'default.target.wants'))
except OSError:
pass
if os.path.exists(symlink_path):
api.current_logger().debug(
'Symlink {} already exists (from previous upgrade?). Removing... '.format(symlink_path)
)
os.unlink(symlink_path)
try:
os.symlink(service_path, symlink_path)
except OSError as e:
raise StopActorExecutionError(
'Could not create a symlink to enable {}'.format(service_name),
details={"details": str(e)})
create_report([
reporting.Title('Leapp resume systemd service enabled'),
reporting.Summary(
'{} enabled as oneshot systemd service to resume Leapp execution '
'after reboot.'.format(service_name)
),
reporting.Severity(reporting.Severity.INFO),
reporting.Groups([reporting.Groups.UPGRADE_PROCESS]),
reporting.RelatedResource('file', service_path),
reporting.RelatedResource('file', symlink_path),
reporting.RelatedResource('service', service_name)
])