1RADOSGW(8) Ceph RADOSGW(8)
2
6 radosgw - rados REST gateway
7
9 radosgw
10
13 radosgw is an HTTP REST gateway for the RADOS object store, a part of
14 the Ceph distributed storage system. It is implemented as a FastCGI
15 module using libfcgi, and can be used in conjunction with any FastCGI
16 capable web server.
17
19 -c ceph.conf, --conf=ceph.conf
20 Use ceph.conf configuration file instead of the default
21 /etc/ceph/ceph.conf to determine monitor addresses during
22 startup.
23 -m monaddress[:port]
25 Connect to specified monitor (instead of looking through
26 ceph.conf).
27 -i ID, --id ID
29 Set the ID portion of name for radosgw
30 -n TYPE.ID, --name TYPE.ID
32 Set the rados user name for the gateway (eg. client.ra‐
33 dosgw.gateway)
34 --cluster NAME
36 Set the cluster name (default: ceph)
37 -d Run in foreground, log to stderr
39 -f Run in foreground, log to usual location
41 --rgw-socket-path=path
43 Specify a unix domain socket path.
44 --rgw-region=region
46 The region where radosgw runs
47 --rgw-zone=zone
49 The zone where radosgw runs
50
52 Earlier RADOS Gateway had to be configured with Apache and mod_fastcgi.
53 Now, mod_proxy_fcgi module is used instead of mod_fastcgi.
54 mod_proxy_fcgi works differently than a traditional FastCGI module.
55 This module requires the service of mod_proxy which provides support
56 for the FastCGI protocol. So, to be able to handle FastCGI protocol,
57 both mod_proxy and mod_proxy_fcgi have to be present in the server. Un‐
58 like mod_fastcgi, mod_proxy_fcgi cannot start the application process.
59 Some platforms have fcgistarter for that purpose. However, external
60 launching of application or process management may be available in the
61 FastCGI application framework in use.
62 Apache can be configured in a way that enables mod_proxy_fcgi to be
64 used with localhost tcp or through unix domain socket. mod_proxy_fcgi
65 that doesn't support unix domain socket such as the ones in Apache 2.2
66 and earlier versions of Apache 2.4, needs to be configured for use with
67 localhost tcp. Later versions of Apache like Apache 2.4.9 or later sup‐
68 port unix domain socket and as such they allow for the configuration
69 with unix domain socket instead of localhost tcp.
70 The following steps show the configuration in Ceph's configuration file
72 i.e, /etc/ceph/ceph.conf and the gateway configuration file i.e,
73 /etc/httpd/conf.d/rgw.conf (RPM-based distros) or
74 /etc/apache2/conf-available/rgw.conf (Debian-based distros) with local‐
75 host tcp and through unix domain socket:
76 1. For distros with Apache 2.2 and early versions of Apache 2.4 that
78 use localhost TCP and do not support Unix Domain Socket, append the
79 following contents to /etc/ceph/ceph.conf:
80 [client.radosgw.gateway]
82 host = {hostname}
83 keyring = /etc/ceph/ceph.client.radosgw.keyring
84 rgw socket path = ""
85 log file = /var/log/ceph/client.radosgw.gateway.log
86 rgw frontends = fastcgi socket_port=9000 socket_host=0.0.0.0
87 rgw print continue = false
88 2. Add the following content in the gateway configuration file:
90 For Debian/Ubuntu add in /etc/apache2/conf-available/rgw.conf:
92 <VirtualHost *:80>
94 ServerName localhost
95 DocumentRoot /var/www/html
96 ErrorLog /var/log/apache2/rgw_error.log
98 CustomLog /var/log/apache2/rgw_access.log combined
99 # LogLevel debug
101 RewriteEngine On
103 RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization},L]
105 SetEnv proxy-nokeepalive 1
107 ProxyPass / fcgi://localhost:9000/
109 </VirtualHost>
111 For CentOS/RHEL add in /etc/httpd/conf.d/rgw.conf:
113 <VirtualHost *:80>
115 ServerName localhost
116 DocumentRoot /var/www/html
117 ErrorLog /var/log/httpd/rgw_error.log
119 CustomLog /var/log/httpd/rgw_access.log combined
120 # LogLevel debug
122 RewriteEngine On
124 RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization},L]
126 SetEnv proxy-nokeepalive 1
128 ProxyPass / fcgi://localhost:9000/
130 </VirtualHost>
132 3. For distros with Apache 2.4.9 or later that support Unix Domain
134 Socket, append the following configuration to /etc/ceph/ceph.conf:
135 [client.radosgw.gateway]
137 host = {hostname}
138 keyring = /etc/ceph/ceph.client.radosgw.keyring
139 rgw socket path = /var/run/ceph/ceph.radosgw.gateway.fastcgi.sock
140 log file = /var/log/ceph/client.radosgw.gateway.log
141 rgw print continue = false
142 4. Add the following content in the gateway configuration file:
144 For CentOS/RHEL add in /etc/httpd/conf.d/rgw.conf:
146 <VirtualHost *:80>
148 ServerName localhost
149 DocumentRoot /var/www/html
150 ErrorLog /var/log/httpd/rgw_error.log
152 CustomLog /var/log/httpd/rgw_access.log combined
153 # LogLevel debug
155 RewriteEngine On
157 RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization},L]
159 SetEnv proxy-nokeepalive 1
161 ProxyPass / unix:///var/run/ceph/ceph.radosgw.gateway.fastcgi.sock|fcgi://localhost:9000/
163 </VirtualHost>
165 Please note, Apache 2.4.7 does not have Unix Domain Socket support
167 in it and as such it has to be configured with localhost tcp. The
168 Unix Domain Socket support is available in Apache 2.4.9 and later
169 versions.
170 5. Generate a key for radosgw to use for authentication with the clus‐
172 ter.
173 ceph-authtool -C -n client.radosgw.gateway --gen-key /etc/ceph/keyring.radosgw.gateway
175 ceph-authtool -n client.radosgw.gateway --cap mon 'allow rw' --cap osd 'allow rwx' /etc/ceph/keyring.radosgw.gateway
176 6. Add the key to the auth entries.
178 ceph auth add client.radosgw.gateway --in-file=keyring.radosgw.gateway
180 7. Start Apache and radosgw.
182 Debian/Ubuntu:
184 sudo /etc/init.d/apache2 start
186 sudo /etc/init.d/radosgw start
187 CentOS/RHEL:
189 sudo apachectl start
191 sudo /etc/init.d/ceph-radosgw start
192
194 radosgw maintains an asynchronous usage log. It accumulates statistics
195 about user operations and flushes it periodically. The logs can be ac‐
196 cessed and managed through radosgw-admin.
197 The information that is being logged contains total data transfer, to‐
199 tal operations, and total successful operations. The data is being ac‐
200 counted in an hourly resolution under the bucket owner, unless the op‐
201 eration was done on the service (e.g., when listing a bucket) in which
202 case it is accounted under the operating user.
203 Following is an example configuration:
205 [client.radosgw.gateway]
207 rgw enable usage log = true
208 rgw usage log tick interval = 30
209 rgw usage log flush threshold = 1024
210 rgw usage max shards = 32
211 rgw usage max user shards = 1
212 The total number of shards determines how many total objects hold the
214 usage log information. The per-user number of shards specify how many
215 objects hold usage information for a single user. The tick interval
216 configures the number of seconds between log flushes, and the flush
217 threshold specify how many entries can be kept before resorting to syn‐
218 chronous flush.
219
221 radosgw is part of Ceph, a massively scalable, open-source, distributed
222 storage system. Please refer to the Ceph documentation at
223 http://ceph.com/docs for more information.
224
226 ceph(8) radosgw-admin(8)
227
229 2010-2021, Inktank Storage, Inc. and contributors. Licensed under Cre‐
230 ative Commons Attribution Share Alike 3.0 (CC-BY-SA-3.0)
231dev May 13, 2021 RADOSGW(8)