Release status: stable
|Description||Includes and registers the php-cloudfiles API (https://github.com/rackerlabs/php-cloudfiles), allowing MediaWiki to interface with an OpenStack Swift storage backend.|
|License||No license specified|
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SwiftCloudFiles uses the Swift Backend that is built into the new wiki core (1.20+). Uploaded files are stored across a swift files container system that allows for a multiple point-of-failure configuration and reduces the risk of data corruption or loss. In a typical wiki configuration, files that are uploaded live in a single that a wiki administrator must maintain. When using a single server, that server provides a single point of failure to all uploaded files. In today's fast-paced world, that can slow down an administrator significantly when he is responsible for syncing, backing-up and or restoring files. With this extension, a wiki administrator can build a private swift instance or utilize a system such as Rackspace Cloud Files for their uploads. The configuration examples below are operational with a Rackspace CloudFiles instance, however they should work with a private swift instance as well. Jwestyp (talk) 21:42, 27 June 2012 (UTC)
Installation[edit | edit source]
Prerequisites[edit | edit source]
Required PHP extensions:
- curl (apt-get install php5-curl)
Extension[edit | edit source]
- Use the download links above to download the package.
- Place in your extensions directory, i.e. http://www.domain.com/w/extensions/.
- You will need to create private credentials file
- You will need to add configuration settings to the LocalSettings.php file.
Private Credentials File[edit | edit source]
Below is an example of the wgAuth.php file that you would have included in a private folder. This folder should be located outside the webroot on your server. If you webroot is located at '/var/www/html/' then a good place for the private folder at '/var/www/private/'.
<?php $wgSwiftConf = array( // This the the url for your authentication server. // For Rackspace Cloud Files, this would be: auth.api.rackspacecloud.com // The current version of SwiftCloudFiles and php-cloudfiles appears to be incompatible with // the newer identity.api.rackspacecloud.com/v1.0 'authUrl' => 'auth.api.rackspacecloud.com', // Some swift authentications require a username to be used with the // account or tenant id. (i.e. 'username:tenant') 'user' => 'Username', // The API Key for used for authentication 'key' => 'API Key' ); ?>
Standard LocalSettings.php configuration example:[edit | edit source]
require( "$IP/extensions/SwiftCloudFiles/SwiftCloudFiles.php" ); require( "/var/www/private/wgauth.php" ); // Location of private credentials file. #$wgHashedUploadDirectory = false; $wgFileBackends = array( 'name' => 'localSwift', 'class' => 'SwiftFileBackend', 'lockManager' => 'nullLockManager', 'swiftUseCDN' => true, 'parallelize' => 'implicit', //These three entries are taken from the wgauth.php private file. 'swiftAuthUrl' => $wgSwiftConf['authUrl'], 'swiftUser' => $wgSwiftConf['user'], 'swiftKey' => $wgSwiftConf['key'] ); $wgLocalFileRepo = array( 'class' => 'LocalRepo', 'name' => 'local', 'backend' => 'localSwift', 'scriptDirUrl' => $wgScriptPath, 'scriptExtension' => $wgScriptExtension, 'url' => 'http://cdn.cdnprovider.com', // Public file location url ->Maybe not needed?<- 'hashLevels' => 0, 'deletedHashLevels' => 0, 'zones' => array( //Change container and url values to match your Swift provider configuration settings 'public' => array( 'container' => 'public', 'url' => 'http://cdn.cdnprovider.com' ), 'thumb' => array( 'container' => 'thumb', 'url' => 'http://cdn.cdnprovider.com' ), 'temp' => array( 'container' => 'temp', 'url' => 'http://cdn.cdnprovider.com' ), 'deleted' => array( 'container' => 'deleted' ), // deleted items don't have a URL ) );
Settings information[edit | edit source]
from <MediaWiki Install Directory>/includes/filebackend/SwiftFileBackend.php
/** * @see FileBackendStore::__construct() * Additional $config params include: * - swiftAuthUrl : Swift authentication server URL * - swiftUser : Swift user used by MediaWiki (account:username) * - swiftKey : Swift authentication key for the above user * - swiftAuthTTL : Swift authentication TTL (seconds) * - swiftTempUrlKey : Swift "X-Account-Meta-Temp-URL-Key" value on the account. * Do not set this until it has been set in the backend. * - swiftAnonUser : Swift user used for end-user requests (account:username). * If set, then views of public containers are assumed to go * through this user. If not set, then public containers are * accessible to unauthenticated requests via ".r:*" in the ACL. * - swiftUseCDN : Whether a Cloud Files Content Delivery Network is set up * - swiftCDNExpiry : How long (in seconds) to store content in the CDN. * If files may likely change, this should probably not exceed * a few days. For example, deletions may take this long to apply. * If object purging is enabled, however, this is not an issue. * - swiftCDNPurgable : Whether object purge requests are allowed by the CDN. * - shardViaHashLevels : Map of container names to sharding config with: * - base : base of hash characters, 16 or 36 * - levels : the number of hash levels (and digits) * - repeat : hash subdirectories are prefixed with all the * parent hash directory names (e.g. "a/ab/abc") * - cacheAuthInfo : Whether to cache authentication tokens in APC, XCache, ect. * If those are not available, then the main cache will be used. * This is probably insecure in shared hosting environments. * - rgwS3AccessKey : Ragos Gateway S3 "access key" value on the account. * Do not set this until it has been set in the backend. * This is used for generating expiring pre-authenticated URLs. * Only use this when using rgw and to work around * http://tracker.newdream.net/issues/3454. * - rgwS3SecretKey : Ragos Gateway S3 "secret key" value on the account. * Do not set this until it has been set in the backend. * This is used for generating expiring pre-authenticated URLs. * Only use this when using rgw and to work around * http://tracker.newdream.net/issues/3454. */
from <MediaWiki Install Directory>/includes/filebackend/FileBackend.php (this is inherited from SwiftFileBackend.php)
/** * Create a new backend instance from configuration. * This should only be called from within FileBackendGroup. * * $config includes: * - name : The unique name of this backend. * This should consist of alphanumberic, '-', and '_' characters. * This name should not be changed after use (e.g. with journaling). * Note that the name is *not* used in actual container names. * - wikiId : Prefix to container names that is unique to this backend. * If not provided, this defaults to the current wiki ID. * It should only consist of alphanumberic, '-', and '_' characters. * This ID is what avoids collisions if multiple logical backends * use the same storage system, so this should be set carefully. * - lockManager : Registered name of a file lock manager to use. * - fileJournal : File journal configuration; see FileJournal::factory(). * Journals simply log changes to files stored in the backend. * - readOnly : Write operations are disallowed if this is a non-empty string. * It should be an explanation for the backend being read-only. * - parallelize : When to do file operations in parallel (when possible). * Allowed values are "implicit", "explicit" and "off". * - concurrency : How many file operations can be done in parallel. * * @param $config Array * @throws MWException */
Further Info[edit | edit source]
For more information on the configuration settings used in this extension, visit Manual:Configuration_settings