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205 lines
6.6 KiB
Groff
205 lines
6.6 KiB
Groff
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.TH "CEPH-REST-API" "8" "December 09, 2013" "dev" "Ceph"
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.SH NAME
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ceph-rest-api \- ceph RESTlike administration server
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.SH SYNOPSIS
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.nf
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\fBceph\-rest\-api\fP [ \-c \fIconffile\fP ] [\-\-cluster \fIclustername\fP ] [ \-n \fIname\fP ] [\-i \fIid\fP ]
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.fi
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.sp
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.SH DESCRIPTION
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.sp
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\fBceph\-rest\-api\fP is a WSGI application that can run as a
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standalone web service or run under a web server that supports
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WSGI. It provides much of the functionality of the \fBceph\fP
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command\-line tool through an HTTP\-accessible interface.
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.SH OPTIONS
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.INDENT 0.0
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.TP
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.B \-c/\-\-conf conffile
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names the ceph.conf file to use for configuration. If \-c is not
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specified, the default depends on the state of the \-\-cluster option
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(default \(aqceph\(aq; see below). The configuration file is searched
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for in this order:
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.INDENT 7.0
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.IP \(bu 2
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$CEPH_CONF
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.IP \(bu 2
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/etc/ceph/${cluster}.conf
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.IP \(bu 2
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~/.ceph/${cluster}.conf
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.IP \(bu 2
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${cluster}.conf (in the current directory)
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.UNINDENT
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.sp
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so you can also pass this option in the environment as CEPH_CONF.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-cluster clustername
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set \fIclustername\fP for use in the $cluster metavariable, for
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locating the ceph.conf file. The default is \(aqceph\(aq.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-n/\-\-name name
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specifies the client \(aqname\(aq, which is used to find the
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client\-specific configuration options in the config file, and
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also is the name used for authentication when connecting
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to the cluster (the entity name appearing in ceph auth list output,
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for example). The default is \(aqclient.restapi\(aq.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-i/\-\-id id
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specifies the client \(aqid\(aq, which will form the clientname
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as \(aqclient.<id>\(aq if clientname is not set. If \-n/\-name is
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set, that takes precedence.
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.sp
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Also, global Ceph options are supported.
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.UNINDENT
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.SH CONFIGURATION PARAMETERS
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.sp
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Supported configuration parameters include:
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.INDENT 0.0
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.IP \(bu 2
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\fBkeyring\fP the keyring file holding the key for \(aqclientname\(aq
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.IP \(bu 2
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\fBpublic addr\fP ip:port to listen on (default 0.0.0.0:5000)
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.IP \(bu 2
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\fBlog file\fP (usual Ceph default)
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.IP \(bu 2
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\fBrestapi base url\fP the base URL to answer requests on (default /api/v0.1)
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.IP \(bu 2
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\fBrestapi log level\fP critical, error, warning, info, debug (default warning)
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.UNINDENT
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.sp
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Configuration parameters are searched in the standard order:
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first in the section named \(aq<clientname>\(aq, then \(aqclient\(aq, then \(aqglobal\(aq.
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.sp
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<clientname> is either supplied by \-n/\-\-name, "client.<id>" where
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<id> is supplied by \-i/\-\-id, or \(aqclient.restapi\(aq if neither option
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is present.
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.sp
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A single\-threaded server will run on \fBpublic addr\fP if the ceph\-rest\-api
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executed directly; otherwise, configuration is specified by the enclosing
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WSGI web server.
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.SH COMMANDS
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.sp
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Commands are submitted with HTTP GET requests (for commands that
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primarily return data) or PUT (for commands that affect cluster state).
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HEAD and OPTIONS are also supported. Standard HTTP status codes
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are returned.
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.sp
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For commands that return bulk data, the request can include
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Accept: application/json or Accept: application/xml to select the
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desired structured output, or you may use a .json or .xml addition
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to the requested PATH. Parameters are supplied as query parameters
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in the request; for parameters that take more than one value, repeat
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the key=val construct. For instance, to remove OSDs 2 and 3,
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send a PUT request to \fBosd/rm?ids=2&ids=3\fP\&.
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.SH DISCOVERY
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.sp
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Human\-readable discovery of supported commands and parameters, along
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with a small description of each command, is provided when the requested
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path is incomplete/partially matching. Requesting / will redirect to
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the value of \fBrestapi base url\fP, and that path will give a full list
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of all known commands. The command set is very similar to the commands
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supported by the \fBceph\fP tool. One notable exception is that the
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\fBceph pg <pgid> <command>\fP style of commands is supported here
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as \fBtell/<pgid>/command?args\fP\&.
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.SH DEPLOYMENT AS WSGI APPLICATION
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.sp
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When deploying as WSGI application (say, with Apache/mod_wsgi,
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or nginx/uwsgi, or gunicorn, etc.), use the \fBceph_rest_api.py\fP module
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(\fBceph\-rest\-api\fP is a thin layer around this module). The standalone web
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server is of course not used, so address/port configuration is done in
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the WSGI server. Use a python .wsgi module or the equivalent to call
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\fBapp = generate_app(conf, cluster, clientname, clientid, args)\fP where:
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.INDENT 0.0
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.IP \(bu 2
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conf is as \-c/\-\-conf above
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.IP \(bu 2
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cluster is as \-\-cluster above
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.IP \(bu 2
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clientname, \-n/\-\-name
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.IP \(bu 2
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clientid, \-i/\-\-id, and
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.IP \(bu 2
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args are any other generic Ceph arguments
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.UNINDENT
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.sp
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When app is returned, it will have attributes \(aqceph_addr\(aq and \(aqceph_port\(aq
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set to what the address and port are in the Ceph configuration;
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those may be used for the server, or ignored.
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.sp
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Any errors reading configuration or connecting to the cluster cause an
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exception to be raised; see your WSGI server documentation for how to
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see those messages in case of problem.
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.SH AVAILABILITY
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.sp
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\fBceph\-rest\-api\fP is part of the Ceph distributed storage system. Please refer to the Ceph documentation at
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\fI\%http://ceph.com/docs\fP for more information.
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.SH SEE ALSO
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.sp
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\fBceph\fP(8)
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.SH COPYRIGHT
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2010-2013, Inktank Storage, Inc. and contributors. Licensed under Creative Commons BY-SA
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