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 : //usr/share/doc/cloud-init/examples/cloud-config-datasources.txt
#cloud-config

# Documentation on data sources configuration options
datasource:
  # Ec2 
  Ec2:
    # timeout: the timeout value for a request at metadata service
    timeout : 50
    # The length in seconds to wait before giving up on the metadata
    # service.  The actual total wait could be up to 
    #   len(resolvable_metadata_urls)*timeout
    max_wait : 120

    #metadata_url: a list of URLs to check for metadata services
    metadata_urls:
     - http://169.254.169.254:80
     - http://instance-data:8773

  MAAS:
    timeout : 50
    max_wait : 120

    # there are no default values for metadata_url or oauth credentials
    # If no credentials are present, non-authed attempts will be made.
    metadata_url: http://mass-host.localdomain/source
    consumer_key: Xh234sdkljf
    token_key: kjfhgb3n
    token_secret: 24uysdfx1w4

  NoCloud:
    # default seedfrom is None
    # if found, then it should contain a url with:
    #    <url>/user-data and <url>/meta-data
    # seedfrom: http://my.example.com/i-abcde/
    seedfrom: None

    # fs_label: the label on filesystems to be searched for NoCloud source
    fs_label: cidata

    # these are optional, but allow you to basically provide a datasource
    # right here
    user-data: |
      # This is the user-data verbatim
    meta-data:
      instance-id: i-87018aed
      local-hostname: myhost.internal

  SmartOS:
    # For KVM guests:
    # Smart OS datasource works over a serial console interacting with
    # a server on the other end. By default, the second serial console is the
    # device. SmartOS also uses a serial timeout of 60 seconds.
    serial_device: /dev/ttyS1
    serial_timeout: 60

    # For LX-Brand Zones guests:
    # Smart OS datasource works over a socket interacting with
    # the host on the other end. By default, the socket file is in
    # the native .zoncontrol directory.
    metadata_sockfile: /native/.zonecontrol/metadata.sock

    # a list of keys that will not be base64 decoded even if base64_all
    no_base64_decode: ['root_authorized_keys', 'motd_sys_info',
                       'iptables_disable']
    # a plaintext, comma delimited list of keys whose values are b64 encoded
    base64_keys: []
    # a boolean indicating that all keys not in 'no_base64_decode' are encoded
    base64_all: False

haha - 2025