os-faults/os_faults/drivers/services/systemd.py

67 lines
2.1 KiB
Python

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from os_faults.drivers.services import process
class SystemdService(process.ServiceAsProcess):
"""Systemd service.
Service as Systemd unit and can be controlled by `systemctl` CLI tool.
**Example configuration:**
.. code-block:: yaml
services:
app:
driver: systemd_service
args:
systemd_service: app
grep: my_app
port: ['tcp', 4242]
parameters:
- **systemd_service** - name of a service in systemd
- **grep** - regexp for grep to find process PID
- **port** - tuple with two values - protocol, port number (optional)
"""
NAME = 'systemd_service'
DESCRIPTION = 'Service in Systemd'
CONFIG_SCHEMA = {
'type': 'object',
'properties': {
'systemd_service': {'type': 'string'},
'grep': {'type': 'string'},
'port': process.PORT_SCHEMA,
'start_cmd': {'type': 'string'},
'terminate_cmd': {'type': 'string'},
'restart_cmd': {'type': 'string'},
},
'required': ['grep', 'systemd_service'],
'additionalProperties': False,
}
def __init__(self, *args, **kwargs):
super(SystemdService, self).__init__(*args, **kwargs)
self.systemd_service = self.config['systemd_service']
self.restart_cmd = 'sudo systemctl restart {}'.format(
self.systemd_service)
self.terminate_cmd = 'sudo systemctl stop {}'.format(
self.systemd_service)
self.start_cmd = 'sudo systemctl start {}'.format(
self.systemd_service)