ceph-conf – ceph conf file tool
ceph-conf is a utility for getting information from a ceph
configuration file. As with most Ceph programs, you can specify which
Ceph configuration file to use with the
Note that unlike other ceph tools, ceph-conf will only read from
config files (or return compiled-in default values)–it will not
fetch config values from the monitor cluster. For this reason it is
recommended that ceph-conf only be used in legacy environments
that are strictly config-file based. New deployments and tools should
instead rely on either querying the monitor explicitly for
ceph config get <daemon> <option>) or use
daemons themselves to fetch effective config options (e.g.,
ceph-osd -i 123 --show-config-value osd_data). The latter option
has the advantages of drawing from compiled-in defaults (which
occasionally vary between daemons), config files, and the monitor’s
config database, providing the exact value that that daemon would be
using if it were started.
ceph-conf performs one of the following actions:
- -L, --list-all-sections
list all sections in the configuration file.
- -l, --list-sections *prefix*
list the sections with the given prefix. For example,
--list-sections monwould list all sections beginning with
- --lookup *key*
search and print the specified configuration setting. Note:
--lookupis the default action. If no other actions are given on the command line, we will default to doing a lookup.
- -h, --help
print a summary of usage.
- -c *conffile*
the Ceph configuration file.
- --filter-key *key*
filter section list to only include sections with given key defined.
- --filter-key-value *key* ``=`` *value*
filter section list to only include sections with given key/value pair.
- --name *type.id*
the Ceph name in which the sections are searched (default ‘client.admin’). For example, if we specify
--name osd.0, the following sections will be searched: [osd.0], [osd], [global]
- --pid *pid*
$pidwhen expanding options. For example, if an option is configured like
$pidportion in its value will be substituted using the PID of ceph-conf instead of the PID of the process specified using the
- -r, --resolve-search
search for the first file that exists and can be opened in the resulted comma delimited search list.
- -s, --section
additional sections to search. These additional sections will be searched before the sections that would normally be searched. As always, the first matching entry we find will be returned.
To find out what value osd 0 will use for the “osd data” option:
ceph-conf -c foo.conf --name osd.0 --lookup "osd data"
To find out what value will mds a use for the “log file” option:
ceph-conf -c foo.conf --name mds.a "log file"
To list all sections that begin with “osd”:
ceph-conf -c foo.conf -l osd
To list all sections:
ceph-conf -c foo.conf -L
To print the path of the “keyring” used by “client.0”:
ceph-conf --name client.0 -r -l keyring
the Ceph configuration files to use if not specified.
ceph-conf is part of Ceph, a massively scalable, open-source, distributed storage system. Please refer to the Ceph documentation at https://docs.ceph.com for more information.