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pebble.py
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pebble.py
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# Copyright 2021 Canonical Ltd.
#
# 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.
"""Client for the Pebble API.
This module provides a way to interact with Pebble, including:
- :class:`~ops.pebble.Client`; communicates directly with the Pebble API.
- :class:`~ops.pebble.Layer` class to define Pebble configuration layers,
including:
- :class:`~ops.pebble.Check` class to represent Pebble checks.
- :class:`~ops.pebble.LogTarget` class to represent Pebble log targets.
- :class:`~ops.pebble.Service` class to represent Pebble service descriptions.
For a command-line interface for local testing, see ``test/pebble_cli.py``.
See more: `Pebble documentation <https://canonical-pebble.readthedocs-hosted.com/>`_
"""
from __future__ import annotations
import binascii
import builtins
import copy
import dataclasses
import datetime
import email.message
import email.parser
import enum
import http.client
import io
import json
import logging
import os
import select
import shutil
import signal
import socket
import sys
import tempfile
import threading
import time
import typing
import urllib.error
import urllib.parse
import urllib.request
import warnings
from typing import (
IO,
TYPE_CHECKING,
Any,
AnyStr,
BinaryIO,
Callable,
Dict,
Generator,
Generic,
Iterable,
List,
Literal,
Optional,
Protocol,
Sequence,
TextIO,
Tuple,
TypedDict,
Union,
)
import websocket
from ops._private import timeconv, yaml
# Public as these are used in the Container.add_layer signature
ServiceDict = typing.TypedDict(
'ServiceDict',
{
'summary': str,
'description': str,
'startup': str,
'override': str,
'command': str,
'after': Sequence[str],
'before': Sequence[str],
'requires': Sequence[str],
'environment': Dict[str, str],
'user': str,
'user-id': Optional[int],
'group': str,
'group-id': Optional[int],
'working-dir': str,
'on-success': str,
'on-failure': str,
'on-check-failure': Dict[str, Any],
'backoff-delay': str,
'backoff-factor': Optional[int],
'backoff-limit': str,
'kill-delay': Optional[str],
},
total=False,
)
HttpDict = typing.TypedDict('HttpDict', {'url': str, 'headers': Dict[str, str]}, total=False)
TcpDict = typing.TypedDict('TcpDict', {'port': int, 'host': str}, total=False)
ExecDict = typing.TypedDict(
'ExecDict',
{
'command': str,
# see JujuVersion.supports_exec_service_context
'service-context': str,
'environment': Dict[str, str],
'user-id': Optional[int],
'user': str,
'group-id': Optional[int],
'group': str,
'working-dir': str,
},
total=False,
)
CheckDict = typing.TypedDict(
'CheckDict',
{
'override': str,
'level': Union['CheckLevel', str],
'period': Optional[str],
'timeout': Optional[str],
'http': Optional[HttpDict],
'tcp': Optional[TcpDict],
'exec': Optional[ExecDict],
'threshold': Optional[int],
},
total=False,
)
# In Python 3.11+ 'services' and 'labels' should be NotRequired, and total=True.
LogTargetDict = typing.TypedDict(
'LogTargetDict',
{
'override': Union[Literal['merge'], Literal['replace']],
'type': Literal['loki'],
'location': str,
'services': List[str],
'labels': Dict[str, str],
},
total=False,
)
LayerDict = typing.TypedDict(
'LayerDict',
{
'summary': str,
'description': str,
'services': Dict[str, ServiceDict],
'checks': Dict[str, CheckDict],
'log-targets': Dict[str, LogTargetDict],
},
total=False,
)
PlanDict = typing.TypedDict(
'PlanDict',
{
'services': Dict[str, ServiceDict],
'checks': Dict[str, CheckDict],
'log-targets': Dict[str, LogTargetDict],
},
total=False,
)
_AuthDict = TypedDict(
'_AuthDict',
{
'permissions': Optional[str],
'user-id': Optional[int],
'user': Optional[str],
'group-id': Optional[int],
'group': Optional[str],
'path': Optional[str],
'make-dirs': Optional[bool],
'make-parents': Optional[bool],
},
total=False,
)
_ServiceInfoDict = TypedDict(
'_ServiceInfoDict',
{'startup': str, 'current': str, 'name': str},
)
# Callback types for _MultiParser header and body handlers
class _BodyHandler(Protocol):
def __call__(self, data: bytes, done: bool = False) -> None: ...
_HeaderHandler = Callable[[bytes], None]
# tempfile.NamedTemporaryFile has an odd interface because of that
# 'name' attribute, so we need to make a Protocol for it.
class _Tempfile(Protocol):
name = ''
def write(self, data: bytes): ...
def close(self): ...
class _FileLikeIO(Protocol[typing.AnyStr]): # That also covers TextIO and BytesIO
def read(self, __n: int = ...) -> typing.AnyStr: ... # for BinaryIO
def write(self, __s: typing.AnyStr) -> int: ...
def __enter__(self) -> typing.IO[typing.AnyStr]: ...
_AnyStrFileLikeIO = Union[_FileLikeIO[bytes], _FileLikeIO[str]]
_TextOrBinaryIO = Union[TextIO, BinaryIO]
_IOSource = Union[str, bytes, _AnyStrFileLikeIO]
_SystemInfoDict = TypedDict('_SystemInfoDict', {'version': str})
if TYPE_CHECKING:
from typing_extensions import NotRequired
_CheckInfoDict = TypedDict(
'_CheckInfoDict',
{
'name': str,
'level': NotRequired[str],
'status': str,
'failures': NotRequired[int],
'threshold': int,
'change-id': NotRequired[str],
},
)
_FileInfoDict = TypedDict(
'_FileInfoDict',
{
'path': str,
'name': str,
'size': NotRequired[Optional[int]],
'permissions': str,
'last-modified': str,
'user-id': NotRequired[Optional[int]],
'user': NotRequired[Optional[str]],
'group-id': NotRequired[Optional[int]],
'group': NotRequired[Optional[str]],
'type': str,
},
)
_ProgressDict = TypedDict('_ProgressDict', {'label': str, 'done': int, 'total': int})
_TaskDict = TypedDict(
'_TaskDict',
{
'id': str,
'kind': str,
'summary': str,
'status': str,
'log': NotRequired[Optional[List[str]]],
'progress': _ProgressDict,
'spawn-time': str,
'ready-time': NotRequired[Optional[str]],
'data': NotRequired[Optional[Dict[str, Any]]],
},
)
_ChangeDict = TypedDict(
'_ChangeDict',
{
'id': str,
'kind': str,
'summary': str,
'status': str,
'ready': bool,
'spawn-time': str,
'tasks': NotRequired[Optional[List[_TaskDict]]],
'err': NotRequired[Optional[str]],
'ready-time': NotRequired[Optional[str]],
'data': NotRequired[Optional[Dict[str, Any]]],
},
)
_Error = TypedDict('_Error', {'kind': str, 'message': str})
_Item = TypedDict('_Item', {'path': str, 'error': NotRequired[_Error]})
_FilesResponse = TypedDict('_FilesResponse', {'result': List[_Item]})
_WarningDict = TypedDict(
'_WarningDict',
{
'message': str,
'first-added': str,
'last-added': str,
'last-shown': NotRequired[Optional[str]],
'expire-after': str,
'repeat-after': str,
},
)
_NoticeDict = TypedDict(
'_NoticeDict',
{
'id': str,
'user-id': NotRequired[Optional[int]],
'type': str,
'key': str,
'first-occurred': str,
'last-occurred': str,
'last-repeated': str,
'occurrences': int,
'last-data': NotRequired[Optional[Dict[str, str]]],
'repeat-after': NotRequired[str],
'expire-after': NotRequired[str],
},
)
class _WebSocket(Protocol):
def connect(self, url: str, socket: socket.socket): ...
def shutdown(self): ...
def send(self, payload: str): ...
def send_binary(self, payload: bytes): ...
def recv(self) -> Union[str, bytes]: ...
logger = logging.getLogger(__name__)
class _NotProvidedFlag:
pass
_not_provided = _NotProvidedFlag()
class _UnixSocketConnection(http.client.HTTPConnection):
"""Implementation of HTTPConnection that connects to a named Unix socket."""
def __init__(
self, host: str, socket_path: str, timeout: Union[_NotProvidedFlag, float] = _not_provided
):
if timeout is _not_provided:
super().__init__(host)
else:
assert isinstance(timeout, (int, float)), timeout # type guard for pyright
super().__init__(host, timeout=timeout)
self.socket_path = socket_path
def connect(self):
"""Override connect to use Unix socket (instead of TCP socket)."""
if not hasattr(socket, 'AF_UNIX'):
raise NotImplementedError(f'Unix sockets not supported on {sys.platform}')
self.sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
self.sock.connect(self.socket_path)
if self.timeout is not _not_provided:
self.sock.settimeout(self.timeout)
class _UnixSocketHandler(urllib.request.AbstractHTTPHandler):
"""Implementation of HTTPHandler that uses a named Unix socket."""
def __init__(self, socket_path: str):
super().__init__()
self.socket_path = socket_path
def http_open(self, req: urllib.request.Request):
"""Override http_open to use a Unix socket connection (instead of TCP)."""
return self.do_open(
_UnixSocketConnection, # type:ignore
req,
socket_path=self.socket_path,
)
def _format_timeout(timeout: float) -> str:
"""Format timeout for use in the Pebble API.
The format is in seconds with a millisecond resolution and an 's' suffix,
as accepted by the Pebble API (which uses Go's time.ParseDuration).
"""
return f'{timeout:.3f}s'
def _start_thread(target: Callable[..., Any], *args: Any, **kwargs: Any) -> threading.Thread:
"""Helper to simplify starting a thread."""
thread = threading.Thread(target=target, args=args, kwargs=kwargs)
thread.start()
return thread
class Error(Exception):
"""Base class of most errors raised by the Pebble client."""
def __repr__(self):
return f'<{type(self).__module__}.{type(self).__name__} {self.args}>'
class TimeoutError(TimeoutError, Error):
"""Raised when a polling timeout occurs."""
class ConnectionError(Error):
"""Raised when the Pebble client can't connect to the socket."""
class ProtocolError(Error):
"""Raised when there's a higher-level protocol error talking to Pebble."""
class PathError(Error):
"""Raised when there's an error with a specific path."""
kind: typing.Literal['not-found', 'permission-denied', 'generic-file-error']
"""Short string representing the kind of error."""
message: str
"""Human-readable error message from the API."""
def __init__(self, kind: str, message: str):
"""This shouldn't be instantiated directly."""
self.kind = kind # type: ignore
self.message = message
def __str__(self):
return f'{self.kind} - {self.message}'
def __repr__(self):
return f'PathError({self.kind!r}, {self.message!r})'
class APIError(Error):
"""Raised when an HTTP API error occurs talking to the Pebble server."""
body: Dict[str, Any]
"""Body of the HTTP response, parsed as JSON."""
code: int
"""HTTP status code."""
status: str
"""HTTP status string (reason)."""
message: str
"""Human-readable error message from the API."""
def __init__(self, body: Dict[str, Any], code: int, status: str, message: str):
"""This shouldn't be instantiated directly."""
super().__init__(message) # Makes str(e) return message
self.body = body
self.code = code
self.status = status
self.message = message
def __repr__(self):
return f'APIError({self.body!r}, {self.code!r}, {self.status!r}, {self.message!r})'
class ChangeError(Error):
"""Raised by actions when a change is ready but has an error."""
err: str
"""Human-readable error message."""
change: Change
"""Change object associated with this error."""
def __init__(self, err: str, change: Change):
"""This shouldn't be instantiated directly."""
self.err = err
self.change = change
def __str__(self):
parts = [self.err]
# Append any task logs to the error message
for i, task in enumerate(self.change.tasks):
if not task.log:
continue
parts.append(f'\n----- Logs from task {i} -----\n')
parts.append('\n'.join(task.log))
if len(parts) > 1:
parts.append('\n-----')
return ''.join(parts)
def __repr__(self):
return f'ChangeError({self.err!r}, {self.change!r})'
class ExecError(Error, Generic[AnyStr]):
"""Raised when a :meth:`Client.exec` command returns a non-zero exit code."""
STR_MAX_OUTPUT = 1024
"""Maximum number of characters that stdout/stderr are truncated to in ``__str__``."""
command: List[str]
"""Command line of command being executed."""
exit_code: int
"""The process's exit code. Because this is an error, this will always be non-zero."""
stdout: Optional[AnyStr]
"""Standard output from the process.
If :meth:`ExecProcess.wait_output` was being called, this is the captured
stdout as a str (or bytes if encoding was None). If :meth:`ExecProcess.wait`
was being called, this is None.
"""
stderr: Optional[AnyStr]
"""Standard error from the process.
If :meth:`ExecProcess.wait_output` was being called and ``combine_stderr``
was False, this is the captured stderr as a str (or bytes if encoding was
None). If :meth:`ExecProcess.wait` was being called or ``combine_stderr``
was True, this is None.
"""
def __init__(
self,
command: List[str],
exit_code: int,
stdout: Optional[AnyStr],
stderr: Optional[AnyStr],
):
self.command = command
self.exit_code = exit_code
self.stdout = stdout
self.stderr = stderr
def __str__(self):
message = f'non-zero exit code {self.exit_code} executing {self.command!r}'
for name, out in [('stdout', self.stdout), ('stderr', self.stderr)]:
if out is None:
continue
truncated = ' [truncated]' if len(out) > self.STR_MAX_OUTPUT else ''
out = out[: self.STR_MAX_OUTPUT]
message = f'{message}, {name}={out!r}{truncated}'
return message
class WarningState(enum.Enum):
"""Enum of states for get_warnings() select parameter."""
ALL = 'all'
PENDING = 'pending'
class ChangeState(enum.Enum):
"""Enum of states for get_changes() select parameter."""
ALL = 'all'
IN_PROGRESS = 'in-progress'
READY = 'ready'
class SystemInfo:
"""System information object."""
def __init__(self, version: str):
self.version = version
@classmethod
def from_dict(cls, d: _SystemInfoDict) -> SystemInfo:
"""Create new SystemInfo object from dict parsed from JSON."""
return cls(version=d['version'])
def __repr__(self):
return f'SystemInfo(version={self.version!r})'
class Warning:
"""Warning object."""
def __init__(
self,
message: str,
first_added: datetime.datetime,
last_added: datetime.datetime,
last_shown: Optional[datetime.datetime],
expire_after: str,
repeat_after: str,
):
self.message = message
self.first_added = first_added
self.last_added = last_added
self.last_shown = last_shown
self.expire_after = expire_after
self.repeat_after = repeat_after
@classmethod
def from_dict(cls, d: _WarningDict) -> Warning:
"""Create new Warning object from dict parsed from JSON."""
return cls(
message=d['message'],
first_added=timeconv.parse_rfc3339(d['first-added']),
last_added=timeconv.parse_rfc3339(d['last-added']),
last_shown=(
timeconv.parse_rfc3339(d['last-shown']) # type: ignore
if d.get('last-shown')
else None
),
expire_after=d['expire-after'],
repeat_after=d['repeat-after'],
)
def __repr__(self):
return (
'Warning('
f'message={self.message!r}, '
f'first_added={self.first_added!r}, '
f'last_added={self.last_added!r}, '
f'last_shown={self.last_shown!r}, '
f'expire_after={self.expire_after!r}, '
f'repeat_after={self.repeat_after!r})'
)
class TaskProgress:
"""Task progress object."""
def __init__(
self,
label: str,
done: int,
total: int,
):
self.label = label
self.done = done
self.total = total
@classmethod
def from_dict(cls, d: _ProgressDict) -> TaskProgress:
"""Create new TaskProgress object from dict parsed from JSON."""
return cls(
label=d['label'],
done=d['done'],
total=d['total'],
)
def __repr__(self):
return (
'TaskProgress('
f'label={self.label!r}, '
f'done={self.done!r}, '
f'total={self.total!r})'
)
class TaskID(str):
"""Task ID (a more strongly-typed string)."""
def __repr__(self):
return f'TaskID({str(self)!r})'
class Task:
"""Task object."""
def __init__(
self,
id: TaskID,
kind: str,
summary: str,
status: str,
log: List[str],
progress: TaskProgress,
spawn_time: datetime.datetime,
ready_time: Optional[datetime.datetime],
data: Optional[Dict[str, Any]] = None,
):
self.id = id
self.kind = kind
self.summary = summary
self.status = status
self.log = log
self.progress = progress
self.spawn_time = spawn_time
self.ready_time = ready_time
self.data = data or {}
@classmethod
def from_dict(cls, d: _TaskDict) -> Task:
"""Create new Task object from dict parsed from JSON."""
return cls(
id=TaskID(d['id']),
kind=d['kind'],
summary=d['summary'],
status=d['status'],
log=d.get('log') or [],
progress=TaskProgress.from_dict(d['progress']),
spawn_time=timeconv.parse_rfc3339(d['spawn-time']),
ready_time=(
timeconv.parse_rfc3339(d['ready-time']) # type: ignore
if d.get('ready-time')
else None
),
data=d.get('data') or {},
)
def __repr__(self):
return (
'Task('
f'id={self.id!r}, '
f'kind={self.kind!r}, '
f'summary={self.summary!r}, '
f'status={self.status!r}, '
f'log={self.log!r}, '
f'progress={self.progress!r}, '
f'spawn_time={self.spawn_time!r}, '
f'ready_time={self.ready_time!r}, '
f'data={self.data!r})'
)
class ChangeID(str):
"""Change ID (a more strongly-typed string)."""
def __repr__(self):
return f'ChangeID({str(self)!r})'
class Change:
"""Change object."""
def __init__(
self,
id: ChangeID,
kind: str,
summary: str,
status: str,
tasks: List[Task],
ready: bool,
err: Optional[str],
spawn_time: datetime.datetime,
ready_time: Optional[datetime.datetime],
data: Optional[Dict[str, Any]] = None,
):
self.id = id
self.kind = kind
self.summary = summary
self.status = status
self.tasks = tasks
self.ready = ready
self.err = err
self.spawn_time = spawn_time
self.ready_time = ready_time
self.data = data or {}
@classmethod
def from_dict(cls, d: _ChangeDict) -> Change:
"""Create new Change object from dict parsed from JSON."""
return cls(
id=ChangeID(d['id']),
kind=d['kind'],
summary=d['summary'],
status=d['status'],
tasks=[Task.from_dict(t) for t in d.get('tasks') or []],
ready=d['ready'],
err=d.get('err'),
spawn_time=timeconv.parse_rfc3339(d['spawn-time']),
ready_time=(
timeconv.parse_rfc3339(d['ready-time']) # type: ignore
if d.get('ready-time')
else None
),
data=d.get('data') or {},
)
def __repr__(self):
return (
'Change('
f'id={self.id!r}, '
f'kind={self.kind!r}, '
f'summary={self.summary!r}, '
f'status={self.status!r}, '
f'tasks={self.tasks!r}, '
f'ready={self.ready!r}, '
f'err={self.err!r}, '
f'spawn_time={self.spawn_time!r}, '
f'ready_time={self.ready_time!r}, '
f'data={self.data!r})'
)
class Plan:
"""Represents the effective Pebble configuration.
A plan is the combined layer configuration. The layer configuration is
documented at
https://canonical-pebble.readthedocs-hosted.com/en/latest/reference/layer-specification/
"""
def __init__(self, raw: Optional[Union[str, PlanDict]] = None):
if isinstance(raw, str): # noqa: SIM108
d = yaml.safe_load(raw) or {} # type: ignore
else:
d = raw or {}
d = typing.cast('PlanDict', d)
self._raw = raw
self._services: Dict[str, Service] = {
name: Service(name, service) for name, service in d.get('services', {}).items()
}
self._checks: Dict[str, Check] = {
name: Check(name, check) for name, check in d.get('checks', {}).items()
}
self._log_targets: Dict[str, LogTarget] = {
name: LogTarget(name, target) for name, target in d.get('log-targets', {}).items()
}
@property
def services(self) -> Dict[str, Service]:
"""This plan's services mapping (maps service name to Service).
This property is currently read-only.
"""
return self._services
@property
def checks(self) -> Dict[str, Check]:
"""This plan's checks mapping (maps check name to :class:`Check`).
This property is currently read-only.
"""
return self._checks
@property
def log_targets(self) -> Dict[str, LogTarget]:
"""This plan's log targets mapping (maps log target name to :class:`LogTarget`).
This property is currently read-only.
"""
return self._log_targets
def to_dict(self) -> PlanDict:
"""Convert this plan to its dict representation."""
fields = [
('services', {name: service.to_dict() for name, service in self._services.items()}),
('checks', {name: check.to_dict() for name, check in self._checks.items()}),
(
'log-targets',
{name: target.to_dict() for name, target in self._log_targets.items()},
),
]
dct = {name: value for name, value in fields if value}
return typing.cast('PlanDict', dct)
def to_yaml(self) -> str:
"""Return this plan's YAML representation."""
return yaml.safe_dump(self.to_dict())
__str__ = to_yaml
def __eq__(self, other: Union[PlanDict, Plan]) -> bool:
if isinstance(other, dict):
return self.to_dict() == other
elif isinstance(other, Plan):
return self.to_dict() == other.to_dict()
return NotImplemented
class Layer:
"""Represents a Pebble configuration layer.
The format of this is documented at
https://canonical-pebble.readthedocs-hosted.com/en/latest/reference/layer-specification/
"""
#: Summary of the purpose of this layer.
summary: str
#: Long-form description of this layer.
description: str
#: Mapping of name to :class:`Service` defined by this layer.
services: Dict[str, Service]
#: Mapping of check to :class:`Check` defined by this layer.
checks: Dict[str, Check]
#: Mapping of target to :class:`LogTarget` defined by this layer.
log_targets: Dict[str, LogTarget]
def __init__(self, raw: Optional[Union[str, LayerDict]] = None):
if isinstance(raw, str): # noqa: SIM108
d = yaml.safe_load(raw) or {} # type: ignore # (Any 'raw' type)
else:
d = raw or {}
d = typing.cast('LayerDict', d)
self.summary = d.get('summary', '')
self.description = d.get('description', '')
self.services = {
name: Service(name, service) for name, service in d.get('services', {}).items()
}
self.checks = {name: Check(name, check) for name, check in d.get('checks', {}).items()}
self.log_targets = {
name: LogTarget(name, target) for name, target in d.get('log-targets', {}).items()
}
def to_yaml(self) -> str:
"""Convert this layer to its YAML representation."""
return yaml.safe_dump(self.to_dict())
def to_dict(self) -> LayerDict:
"""Convert this layer to its dict representation."""
fields = [
('summary', self.summary),
('description', self.description),
('services', {name: service.to_dict() for name, service in self.services.items()}),
('checks', {name: check.to_dict() for name, check in self.checks.items()}),
('log-targets', {name: target.to_dict() for name, target in self.log_targets.items()}),
]
dct = {name: value for name, value in fields if value}
return typing.cast('LayerDict', dct)
def __repr__(self) -> str:
return f'Layer({self.to_dict()!r})'
def __eq__(self, other: Union[LayerDict, Layer]) -> bool:
"""Reports whether this layer configuration is equal to another."""
if isinstance(other, dict):
return self.to_dict() == other
elif isinstance(other, Layer):
return self.to_dict() == other.to_dict()
else:
return NotImplemented
__str__ = to_yaml
class Service:
"""Represents a service description in a Pebble configuration layer."""
def __init__(self, name: str, raw: Optional[ServiceDict] = None):
self.name = name
dct: ServiceDict = raw or {}
self.summary = dct.get('summary', '')
self.description = dct.get('description', '')
self.startup = dct.get('startup', '')
self.override = dct.get('override', '')
self.command = dct.get('command', '')
self.after = list(dct.get('after', []))
self.before = list(dct.get('before', []))
self.requires = list(dct.get('requires', []))
self.environment = dict(dct.get('environment', {}))
self.user = dct.get('user', '')
self.user_id = dct.get('user-id')
self.group = dct.get('group', '')
self.group_id = dct.get('group-id')
self.working_dir = dct.get('working-dir', '')
self.on_success = dct.get('on-success', '')
self.on_failure = dct.get('on-failure', '')
self.on_check_failure = dict(dct.get('on-check-failure', {}))
self.backoff_delay = dct.get('backoff-delay', '')
self.backoff_factor = dct.get('backoff-factor')
self.backoff_limit = dct.get('backoff-limit', '')
self.kill_delay = dct.get('kill-delay', '')
def to_dict(self) -> ServiceDict:
"""Convert this service object to its dict representation."""
fields = [
('summary', self.summary),
('description', self.description),
('startup', self.startup),
('override', self.override),
('command', self.command),
('after', self.after),
('before', self.before),
('requires', self.requires),
('environment', self.environment),
('user', self.user),
('user-id', self.user_id),
('group', self.group),
('group-id', self.group_id),
('working-dir', self.working_dir),
('on-success', self.on_success),
('on-failure', self.on_failure),
('on-check-failure', self.on_check_failure),
('backoff-delay', self.backoff_delay),
('backoff-factor', self.backoff_factor),