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https://github.com/ceph/ceph
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144 lines
4.2 KiB
ReStructuredText
144 lines
4.2 KiB
ReStructuredText
===============================
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radosgw -- rados REST gateway
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===============================
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.. program:: radosgw
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Synopsis
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========
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| **radosgw**
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Description
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===========
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**radosgw** is an HTTP REST gateway for the RADOS object store, a part
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of the Ceph distributed storage system. It is implemented as a FastCGI
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module using libfcgi, and can be used in conjunction with any FastCGI
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capable web server.
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Options
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=======
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.. option:: -c ceph.conf, --conf=ceph.conf
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Use *ceph.conf* configuration file instead of the default
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``/etc/ceph/ceph.conf`` to determine monitor addresses during startup.
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.. option:: -m monaddress[:port]
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Connect to specified monitor (instead of looking through
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``ceph.conf``).
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.. option:: --rgw-socket-path=path
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Specify a unix domain socket path.
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Configuration
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=============
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Currently it's the easiest to use the RADOS Gateway with Apache and mod_fastcgi::
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FastCgiExternalServer /var/www/s3gw.fcgi -socket /tmp/radosgw.sock
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<VirtualHost *:80>
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ServerName rgw.example1.com
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ServerAlias rgw
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ServerAdmin webmaster@example1.com
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DocumentRoot /var/www
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RewriteEngine On
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RewriteRule ^/([a-zA-Z0-9-_.]*)([/]?.*) /s3gw.fcgi?page=$1¶ms=$2&%{QUERY_STRING} [E=HTTP_AUTHORIZATION:%{HTTP:Authorization},L]
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<IfModule mod_fastcgi.c>
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<Directory /var/www>
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Options +ExecCGI
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AllowOverride All
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SetHandler fastcgi-script
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Order allow,deny
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Allow from all
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AuthBasicAuthoritative Off
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</Directory>
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</IfModule>
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AllowEncodedSlashes On
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ServerSignature Off
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</VirtualHost>
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And the corresponding radosgw script (/var/www/s3gw.fcgi)::
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#!/bin/sh
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exec /usr/bin/radosgw -c /etc/ceph/ceph.conf -n client.radosgw.gateway
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The radosgw daemon is a standalone process which needs a configuration
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section in the ceph.conf The section name should start with
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'client.radosgw.' as specified in /etc/init.d/radosgw::
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[client.radosgw.gateway]
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host = gateway
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keyring = /etc/ceph/keyring.radosgw.gateway
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rgw socket path = /tmp/radosgw.sock
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You will also have to generate a key for the radosgw to use for
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authentication with the cluster::
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ceph-authtool -C -n client.radosgw.gateway --gen-key /etc/ceph/keyring.radosgw.gateway
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ceph-authtool -n client.radosgw.gateway --cap mon 'allow r' --cap osd 'allow rwx' /etc/ceph/keyring.radosgw.gateway
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And add the key to the auth entries::
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ceph auth add client.radosgw.gateway --in-file=keyring.radosgw.gateway
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Now you can start Apache and the radosgw daemon::
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/etc/init.d/apache2 start
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/etc/init.d/radosgw start
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Usage Logging
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=============
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The **radosgw** maintains an asynchronous usage log. It accumulates
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statistics about user operations and flushes it periodically. The
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logs can be accessed and managed through **radosgw-admin**.
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The information that is being logged contains total data transfer,
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total operations, and total successful operations. The data is being
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accounted in an hourly resolution under the bucket owner, unless the
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operation was done on the service (e.g., when listing a bucket) in
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which case it is accounted under the operating user.
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Following is an example configuration::
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[client.radosgw.gateway]
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rgw enable usage log = true
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rgw usage log tick interval = 30
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rgw usage log flush threshold = 1024
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rgw usage max shards = 32
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rgw usage max user shards = 1
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The total number of shards determines how many total objects hold the
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usage log information. The per-user number of shards specify how many
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objects hold usage information for a single user. The tick interval
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configures the number of seconds between log flushes, and the flush
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threshold specify how many entries can be kept before resorting to
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synchronous flush.
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Availability
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============
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**radosgw** is part of the Ceph distributed file system. Please refer
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to the Ceph documentation at http://ceph.com/docs for more
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information.
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See also
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========
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:doc:`ceph <ceph>`\(8)
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:doc:`radosgw-admin <radosgw-admin>`\(8)
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