Python-swiftclient

* Support OPTIONS verb, including CORS preflight requests

* Added support for custom log handlers

* Range support is extended to support GET requests with multiple ranges.
Multi-range GETs are not yet supported against large-object manifests.

* Cluster constraints are now settable by config

* Replicators can now run against specific devices or partitions

* swift-bench now supports running on multiple cores and multiple servers

* Added partition option to swift-get-nodes

* Allow underscores in account and user in tempauth via base64 encodings

* New option to the dispersion report to output the missing partitions

* Changed storage server StatsD metrics to report timings instead of
counts for errors. See the admin guide for the updated metric names.

* Removed a dependency on WebOb and replaced it with an internal module

* Fixed config parsing in swift-bench -x

* Fixed sample_rate in StatsD logging

* Track unlinks of async_pendings with StatsD

* Remove double GET on range requests

* Allow unsetting of X-Container-Sync-To and ACL headers

* DB reclamation now removes empty suffix directories

* Fix non-standard 100-continue behavior

* Allow object-expirer to delete the last copy of a versioned object

* Only set TCP_KEEPIDLE on systems where it is supported

* Fix stdin flush and fdatasync issues on BSD platforms

* Allow object-expirer to delete the last version of an object

* Various other minor bug fixes and improvements

swift (1.7.4, OpenStack Folsom)

* Fix issue where early client disconnects may have caused a memory leak

* Fix issue where memcache serialization was not properly loading
the config value

* Use custom encoding for ring data instead of pickle

Serialize RingData in a versioned, custom format which is a combination
of a JSON-encoded header and .tostring() dumps of the
replica2part2dev_id arrays. This format deserializes hundreds of times
faster than rings serialized with Python 2.7's pickle (a significant
performance regression for ring loading between Python 2.6 and Python
2.7). Fixes bug 1031954.

The new implementation is backward-compatible; if a ring
does not begin with a new-style magic string, it is assumed to be an
old-style pickle-dumped ring and is handled as before. So new Swift
code can read old rings, but old Swift code will not be able to read
newly-serialized rings.

* Do not use pickle for serialization in memcache, but JSON

To avoid issues on upgrades (unability to read pickled values, and cache
poisoning for old servers not understanding JSON), we add a
memcache_serialization_support configuration option, with the following
values:

0 = older, insecure pickle serialization
1 = json serialization but pickles can still be read (still insecure)
2 = json serialization only (secure and the default)

To avoid an instant full cache flush, existing installations should
upgrade with 0, then set to 1 and reload, then after some time (24
hours) set to 2 and reload. Support for 0 and 1 will be removed in
future versions.

* Update proxy-server StatsD logging. This is a significant change to the
existing StatsD intigration. Docs for this feature can be found in
doc/source/admin_guide.rst.

* Improved swift-bench to allow random object sizes and better usability

* Updated probe tests

* Replicator removal metrics are now generated on a per-device basis

* Made object replicator locking more optimistic

* Split proxy-server code into separate modules

* Fixed bug where swift-recon would not report all unmounted drives

* Fixed issue where a LockTimeout may have caused a file descriptor to
not be closed properly

* Fixed a bug where an error may have caused the proxy to stop returning
data to a client

* Fixed bug where expirer would get confused by odd deletion times

* Fixed a bug where auto-creating accounts would return an error if they
were recreated after being deleted

* Fix when rate_limit_after_segment kicks in

* fallocate() failures properly return HTTPInsufficientStorage from
object-server before reading from wsgi.input, allowing the proxy
server to quickly error_limit that node

* Fixed error with large object manifests and x-newest headers on GET

* Various other minor bug fixes and improvements

* Removed bin/swift and swift/common/client.py from the swift repo. These
tools are now managed in the python-swiftclient project. The
python-swiftclient project is a second deliverable of the openstack
swift project.

* Moved swift_auth (openstack keystone) middleware from keystone project
into swift project

* Made dispersion report work with any replica count other than 3. This
substantially affects the JSON output of the dispersion report, and any
tools written to consume this output will need to be updated.

* Added Solaris (Illumos) compatibility

* Added -a option to swift-get-nodes to show all handoffs

* Add UDP protocol support for logger

* Added config options for rate limiting of large object downloads.

* Added config option `log_handoffs` (defaults to True) to proxy server
to log and update statsd with information about when a handoff node is
used. This is helpful to track the health of the cluster.

* swift-bench can now use auth 2.0

* Support forbidding substrings based on a regexp in name_filter
middleware

* Hardened internal server processes so only authorized methods can be
called.

* Made ranged requests on large objects work correctly when size of
manifest file is not 0 byte

* Added option to dispersion report to print 404s to stdout

* Fix object replication on older rsync versions when using ipv4

* Fixed bug with container reclaim/report race

* Make object server's caching more configurable.

* Check disk failure before syncing for each partition

* Allow special characters to be referenced by manifest objects

* Validate devices and partitions to avoid directory traversals

* Support WebOb 1.2

* Ensure that accessing the ring devs reloads the ring if necessary.
Specifically, this allows replication to work when it has been started
with an empty ring.

* Various other minor bug fixes and improvements

* New option to toggle SQLite database preallocation with account
and container servers.

IMPORTANT:
The default for database preallocation is now off when before
it was always on. This will affect performance on clusters that
use standard drives with shared account, container, object
servers. Such deployments will need to update their
configurations to turn database preallocation back on (see
account-server.conf-sample and container-server.conf.sample
files).

If you are using dedicated account and container servers with
SSDs, you should defragment your file systems after upgrade and
should notice dramatically less disk usage.

* swift3 middleware removed and moved to http://github.com/fujita/swift3.
This will require a config change in the proxy server and adds a new
dependency for deployers using this middleware.

* Moved proxy server logging to middleware. This requires a config change
in the proxy server.

* Added object versioning feature. (See docs for full description)

* Add statsd logging throughout the system (beta, some event names may
change)

* Expanded swift-recon middleware support

* The ring builder now supports as-unique-as-possible partition
placement, unified balancing methods, and can work on more than one
device at a time.

* Numerous bug fixes to StaticWeb (previously unusable at scale).

* Bug fixes to all middleware to allow passthrough requests under various
conditions and to share pre-authed request code (which previously had
differing behaviors and interaction bugs).

* Bug fix to object expirer that could cause infinite looping.

* Added optional delay to account reaping.

* Async-pending write optimization.

* Dispersion tools now support multiple auth versions

* Updated man pages

* Proxy server can now deny requests to particular hostnames

* Updated docs for domain remap middleware

* Updated docs for cname lookup middleware

* Made swift CLI binary easier to wrap

* Proxy will now also return X-Timestamp header

* Added associated projects doc as a place to track ecosystem projects

* end_marker made consistent across both object and container listings

* Various other minor bug fixes and improvements

swift (1.4.8, OpenStack Essex)

* Added optional max_containers_per_account restriction

* Added alternate metadata header removal method

* Added optional name_check middleware filter

* Added support for venv-based test runs with tox

* StaticWeb behavior change with X-Web-Mode: true and
non-StaticWeb-enabled containers (immediately 404s instead of passing
the request on down the WSGI pipeline).

* Fixed typo in swift-dispersion-report JSON output.

* Swift-Recon-related fix to create temporary files on the same disk as
their final destinations.

* Updated return codes in swift3 middleware

* Fixed swift3 middleware to allow Content-Range header in response

* Updated swift.common.client and swift CLI tool with auth 2.0 changes

* Swift CLI tool now supports common openstack auth args

* Body of HTTP responses now included in error messages of swift CLI tool

* Refactored some ring building functions for clarity and simplicity

* Improvements to account and container replication.

* Fix for account servers allowing .pending to exist before .db.

* Fixed possible key-guessing exploit in formpost.

* Fixed bug in ring builder when removing a large percentage of devices.

* Swift CLI tool now supports openstack-standard CLI flags.

* New JSON output option for swift-dispersion-report.

* Removed old stats tools.

* Other bug fixes and documentation updates.