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246 | def deactivate_ssh(
*,
task_group_activity_id: int,
task_group_id: int,
fractal_ssh: FractalSSH,
tasks_base_dir: str,
) -> None:
"""
Deactivate a task group venv.
This function is run as a background task, therefore exceptions must be
handled.
Arguments:
task_group_id:
task_group_activity_id:
fractal_ssh:
tasks_base_dir:
Only used as a `safe_root` in `remove_dir`, and typically set to
`user_settings.ssh_tasks_dir`.
"""
with TemporaryDirectory() as tmpdir:
log_file_path = get_log_path(Path(tmpdir))
logger = set_logger(
logger_name=LOGGER_NAME,
log_file_path=log_file_path,
)
with next(get_sync_db()) as db:
# Get main objects from db
activity = db.get(TaskGroupActivityV2, task_group_activity_id)
task_group = db.get(TaskGroupV2, task_group_id)
if activity is None or task_group is None:
# Use `logging` directly
logging.error(
"Cannot find database rows with "
f"{task_group_id=} and {task_group_activity_id=}:\n"
f"{task_group=}\n{activity=}. Exit."
)
return
# Log some info
logger.debug("START")
for key, value in task_group.model_dump().items():
logger.debug(f"task_group.{key}: {value}")
# Check that SSH connection works
try:
fractal_ssh.check_connection()
except Exception as e:
logger.error("Cannot establish SSH connection.")
fail_and_cleanup(
task_group=task_group,
task_group_activity=activity,
logger_name=LOGGER_NAME,
log_file_path=log_file_path,
exception=e,
db=db,
)
return
# Check that the (local) task_group venv_path does exist
if not fractal_ssh.remote_exists(task_group.venv_path):
error_msg = f"{task_group.venv_path} does not exist."
logger.error(error_msg)
fail_and_cleanup(
task_group=task_group,
task_group_activity=activity,
logger_name=LOGGER_NAME,
log_file_path=log_file_path,
exception=FileNotFoundError(error_msg),
db=db,
)
return
try:
activity.status = TaskGroupActivityStatusV2.ONGOING
activity = add_commit_refresh(obj=activity, db=db)
if task_group.pip_freeze is None:
logger.warning(
"Recreate pip-freeze information, since "
f"{task_group.pip_freeze=}. NOTE: this should only "
"happen for task groups created before 2.9.0."
)
# Prepare replacements for templates
replacements = get_collection_replacements(
task_group=task_group,
python_bin="/not/applicable",
)
# Define script_dir_remote and create it if missing
script_dir_remote = (
Path(task_group.path) / SCRIPTS_SUBFOLDER
).as_posix()
fractal_ssh.mkdir(folder=script_dir_remote, parents=True)
# Prepare arguments for `_customize_and_run_template`
common_args = dict(
replacements=replacements,
script_dir_local=(
Path(tmpdir) / SCRIPTS_SUBFOLDER
).as_posix(),
script_dir_remote=script_dir_remote,
prefix=(
f"{int(time.time())}_"
f"{TaskGroupActivityActionV2.DEACTIVATE}"
),
fractal_ssh=fractal_ssh,
logger_name=LOGGER_NAME,
)
# Run `pip freeze`
pip_freeze_stdout = _customize_and_run_template(
template_filename="3_pip_freeze.sh",
**common_args,
)
# Update pip-freeze data
logger.info("Add pip freeze stdout to TaskGroupV2 - start")
activity.log = get_current_log(log_file_path)
activity = add_commit_refresh(obj=activity, db=db)
task_group.pip_freeze = pip_freeze_stdout
task_group = add_commit_refresh(obj=task_group, db=db)
logger.info("Add pip freeze stdout to TaskGroupV2 - end")
# Handle some specific cases for wheel-file case
if task_group.origin == TaskGroupV2OriginEnum.WHEELFILE:
logger.info(
f"Handle specific cases for {task_group.origin=}."
)
# Blocking situation: `wheel_path` is not set or points
# to a missing path
if (
task_group.wheel_path is None
or not fractal_ssh.remote_exists(task_group.wheel_path)
):
error_msg = (
"Invalid wheel path for task group with "
f"{task_group_id=}. {task_group.wheel_path=} is "
"unset or does not exist."
)
logger.error(error_msg)
fail_and_cleanup(
task_group=task_group,
task_group_activity=activity,
logger_name=LOGGER_NAME,
log_file_path=log_file_path,
exception=FileNotFoundError(error_msg),
db=db,
)
return
# Recoverable situation: `wheel_path` was not yet copied
# over to the correct server-side folder
wheel_path_parent_dir = Path(task_group.wheel_path).parent
if wheel_path_parent_dir != Path(task_group.path):
logger.warning(
f"{wheel_path_parent_dir.as_posix()} differs from "
f"{task_group.path}. NOTE: this should only "
"happen for task groups created before 2.9.0."
)
if task_group.wheel_path not in task_group.pip_freeze:
raise ValueError(
f"Cannot find {task_group.wheel_path=} in "
"pip-freeze data. Exit."
)
logger.info(
f"Now copy wheel file into {task_group.path}."
)
new_wheel_path = _copy_wheel_file_ssh(
task_group=task_group,
fractal_ssh=fractal_ssh,
logger_name=LOGGER_NAME,
)
logger.info(f"Copied wheel file to {new_wheel_path}.")
task_group.wheel_path = new_wheel_path
new_pip_freeze = task_group.pip_freeze.replace(
task_group.wheel_path,
new_wheel_path,
)
task_group.pip_freeze = new_pip_freeze
task_group = add_commit_refresh(obj=task_group, db=db)
logger.info(
"Updated `wheel_path` and `pip_freeze` "
"task-group attributes."
)
# We now have all required information for reactivating the
# virtual environment at a later point
logger.info(f"Now removing {task_group.venv_path}.")
fractal_ssh.remove_folder(
folder=task_group.venv_path,
safe_root=tasks_base_dir,
)
logger.info(f"All good, {task_group.venv_path} removed.")
activity.status = TaskGroupActivityStatusV2.OK
activity.log = get_current_log(log_file_path)
activity.timestamp_ended = get_timestamp()
activity = add_commit_refresh(obj=activity, db=db)
except Exception as e:
fail_and_cleanup(
task_group=task_group,
task_group_activity=activity,
logger_name=LOGGER_NAME,
log_file_path=log_file_path,
exception=e,
db=db,
)
return
|