晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Current File : //opt/imunify360/venv/lib64/python3.11/site-packages/defence360agent/plugins/lve_utils_install.py
from defence360agent.contracts.plugins import MessageSink
from defence360agent.utils import (
    check_run,
    recurring_check,
    RecurringCheckStop,
)
from defence360agent.utils.resource_limits import is_lve_active, has_lvectl


class LveUtilsAutoInstaller(MessageSink):
    """
    Install lve-utils package on CL with LVE automatically
    (according to DEF-11452) to provide tools to limit CPU/IO.

    Used tools:
    /usr/sbin/lvectl - provided by lve-utils package
    /bin/lve_suwrapper - provided by lve-wrappers package
                         (which is a dependency of lve-utils)

    lve-utils package is installed by default on CL,
    but for some reason may not exist.
    """

    def __init__(self, *, check_period=3600):
        self._check_period = check_period
        self._task = None

    async def create_sink(self, loop):
        self._loop = loop
        self._task = self._loop.create_task(
            recurring_check(self._check_period)(
                self._install_lve_utils_if_needed
            )()
        )

    async def shutdown(self):
        if self._task is not None:
            self._task.cancel()
            await self._task
            self._task = None

    async def _install_lve_utils_if_needed(self):
        if not is_lve_active():  # kernel doesn't support lve or it is disabled
            # no point trying to install lve-utils
            raise RecurringCheckStop()
        # suppose that lve should be actived on CL only
        if not has_lvectl():  # utilities might have been removed
            await check_run(["yum", "-y", "install", "lve-utils"])

haha - 2025