ceph daemon osd.0 config show | less
+Reading Configuration Metadata at Runtime
+=========================================
+
+Information about the available configuration options is available via
+the ``config help`` command:
+
+::
+
+ ceph daemon {daemon-type}.{id} config help | less
+
+
+This metadata is primarily intended to be used when integrating other
+software with Ceph, such as graphical user interfaces. The output is
+a list of JSON objects, for example:
+
+::
+
+ {
+ "name": "mon_host",
+ "type": "std::string",
+ "level": "basic",
+ "desc": "list of hosts or addresses to search for a monitor",
+ "long_desc": "This is a comma, whitespace, or semicolon separated list of IP addresses or hostnames. Hostnames are resolved via DNS and all A or AAAA records are included in the search list.",
+ "default": "",
+ "daemon_default": "",
+ "tags": [],
+ "services": [
+ "common"
+ ],
+ "see_also": [],
+ "enum_values": [],
+ "min": "",
+ "max": ""
+ }
+
+type
+____
+
+The type of the setting, given as a C++ type name.
+
+level
+_____
+
+One of `basic`, `advanced`, `dev`. The `dev` options are not intended
+for use outside of development and testing.
+
+desc
+____
+
+A short description -- this is a sentence fragment suitable for display
+in small spaces like a single line in a list.
+
+long_desc
+_________
+
+A full description of what the setting does, this may be as long as needed.
+
+default
+_______
+
+The default value, if any.
+
+daemon_default
+______________
+
+An alternative default used for daemons (services) as opposed to clients.
+
+tags
+____
+
+A list of strings indicating topics to which this setting relates. Examples
+of tags are `performance` and `networking`.
+
+services
+________
+
+A list of strings indicating which Ceph services the setting relates to, such
+as `osd`, `mds`, `mon`. For settings that are relevant to any Ceph client
+or server, `common` is used.
+
+see_also
+________
+
+A list of strings indicating other configuration options that may also
+be of interest to a user setting this option.
+
+enum_values
+___________
+
+Optional: a list of strings indicating the valid settings.
+
+min, max
+________
+
+Optional: upper and lower (inclusive) bounds on valid settings.
+
+
+
Running Multiple Clusters
=========================