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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# Copyright (C) 2022 Red Hat Inc., Jake Hunsaker <jhunsake@redhat.com>

# This file is part of the sos project: https://github.com/sosreport/sos
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions of
# version 2 of the GNU General Public License.
#
# See the LICENSE file in the source distribution for further information.

import json

from sos.collector.clusters import Cluster


class ceph(Cluster):
    """
    This cluster profile is for Ceph Storage clusters, and is primarily
    built around Red Hat Ceph Storage 5. Nodes are enumerated via `cephadm`; if
    your Ceph deployment uses cephadm but is not RHCS 5, this profile may work
    as intended, but it is not currently guaranteed to do so. If you are using
    such an environment and this profile does not work for you, please file a
    bug report detailing what is failing.

    By default, all nodes in the cluster will be returned for collection. This
    may not be desirable, so users are encouraged to use the `labels` option
    to specify a colon-delimited set of ceph node labels to restrict the list
    of nodes to.

    For example, using `-c ceph.labels=osd:mgr` will return only nodes labeled
    with *either* `osd` or `mgr`.
    """

    cluster_name = 'Ceph Storage Cluster'
    sos_plugins = [
        'ceph_common',
    ]
    sos_options = {'log-size': 50}
    packages = ('cephadm',)
    option_list = [
        ('labels', '', 'Colon delimited list of labels to select nodes with')
    ]

    def get_nodes(self):
        self.nodes = []
        ceph_out = self.exec_primary_cmd(
            'cephadm shell -- ceph orch host ls --format json',
            need_root=True
        )

        if not ceph_out['status'] == 0:
            self.log_error(
                f"Could not enumerate nodes via cephadm: {ceph_out['output']}"
            )
            return self.nodes

        nodes = json.loads(ceph_out['output'].splitlines()[-1])
        _labels = [lab for lab in self.get_option('labels').split(':') if lab]
        for node in nodes:
            if _labels and not any(_l in node['labels'] for _l in _labels):
                self.log_debug(f"{node} filtered from list due to labels")
                continue
            self.nodes.append(node['hostname'])

        return self.nodes

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