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CHANGELOG
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swift (2.34.0, OpenStack Dalmatian)
* Middleware features:
* The static large object (SLO) middleware now supports including
a `?part-number=<N>` query parameter to request just part of a
large object. This may be used to enable efficient parallel
downloads. For more information, see
https://docs.openstack.org/swift/latest/overview_large_objects.html#retrieving-a-large-object
* The S3 API middleware now supports the `?partNumber=<N>` query
parameter, enabling parallel downloads.
* The KMS keymaster now supports overriding the endpoint returned
in the Keystone catalog via the `barbican_endpoint` configuration
option. This may be useful in multi-region deployments which have
multiple endpoints.
* The backend ratelimiter now supports dynamic reloading of limits.
The new configuration options `backend_ratelimit_conf_path` and
`config_reload_interval` control which file is reloaded and how
frequently, respectively.
* The backend ratelimiter now supports per-method, per-device
ratelimits. See `etc/backend-ratelimit.conf-sample` for more
information.
* S3 API improvements:
* Error response reasons are now logged as part of the `log_info`
field. This can be especially useful when diagnosing HEAD
failures, which necessarily have no response body.
* Fixed a server error when using non-ASCII access key IDs.
* Fixed several checksum-related error responses to be more AWS-like.
* Account quota improvements:
* Overall account byte quotas should now be set with the
`X-Account-Quota-Bytes` header. The `X-Account-Meta-Quota-Bytes`
header is now deprecated.
* The account quota middleware now supports object-count quotas
in addition to byte-count quotas, similar to the container
quota middleware. For more information, see
https://docs.openstack.org/swift/latest/middleware.html#module-swift.common.middleware.account_quotas
* Using an `X-Remove-Account-Quota-Bytes-Policy-<policy name>` header
now removes the per-policy quota, rather than reducing it to zero.
* Object expiration improvements:
* Added per-account and per-container reaping delays. These may be
used to offer some grace period in which to recover expired objects.
* Added a proxy-server configuration option: `allow_open_expired`.
This defaults to false; if true, clients may intereact with expired
objects by including an `X-Open-Expired: true` header in GET, HEAD,
or POST requests.
* Expiring object queue entries now include the size of the object to
be expired in the `swift_expirer_bytes` parameter of the queue entry's
content-type.
* Added metrics to count skipped, delayed, and assigned tasks as
they're enumerated.
* Proxy-server fixes:
* Object POSTs now 503 rather than trusting the 404s that might be
returned from handoffs when primaries are overloaded.
* Client disconnects should always be logged within the context of
the appropriate client request. Previously, there were some cases
where logging would occur during general garbage collection, leading
to incorrect or missing transaction IDs in logs.
* The proxy-logging middleware now emits timing and transfer stats for
more requests such as auth requests. These will be labeled `UNKNOWN`
rather than `account`, `container`, etc.
* Fixed a server error when the Swift request path has missing account
or container components.
* Python 3.12 is now supported.
* `EUCLEAN` errors are better handled on the object server.
* `swift-account-info` now supports the `--sync` option to display the
contents of the incoming and outgoing sync tables, similar to
`swift-container-info`.
* The `swift-drive-audit` tool now works with ISO timestamps in kernel
logs.
* The `swift-recon-cron` tool now better handles missing directories.
* Dependency update: lxml must be at least 4.2.3.
* Various other minor bug fixes and improvements.
swift (2.33.0, OpenStack Caracal)
* S3 API fixes:
* When the `+segments` container's storage policy differs from that of
the primary container, completed manifests are now written with the
correct policy in the primary container.
* Add basic read support for object locking. This improves
compatibility with an Ansible S3 module. Write support is not
yet implemented, so get-object-lock-configuration will always 404.
* If there's a conflict deleting the in-progress-upload marker when
completing a multipart-upload, a 503 is now returned to the client,
prompting it to retry.
* Added `Accept-Ranges: bytes` to object responses. Range requests
have always been supported; now, that support is properly advertised.
* Static large object fixes:
* Fixed a server error when handling conditional GET requests.
* Return an error if the SLO manifest could not be parsed. Previously,
a zero-byte response was returned.
* Proxy server fixes:
* Added a new `swift.proxy_logging_status` request environment key that
middlewares may use to override the logged status for a request.
* Transaction IDs are included in more error responses.
* Added a counter metric when caching shard ranges.
* The `recoverable_node_timeout` option no longer applies to
`X-Newest` GET requests.
* Improved error-handling in multi-part range responses.
* Sharding fixes:
* Prevent resets of a shard range's epoch.
* Cleaned up `X-Backend-*` headers in listing responses.
* Reduced the frequency of `Reclaimable db stuck waiting for shrinking`
messages when a root DB has been deleted but its shards have not been
shrunk away.
* The more-efficient shard range structure from the last release is now
used when fetching ranges from the backend.
* Include more information in shard-replication warnings.
* Object server fixes:
* Object POSTs and chunked PUTs are no longer accepted when the target
drive is already past its `fallocate_reserve`. DELETEs are still
allowed.
* Added the ability to configure cooperative yielding when servicing
GET responses, via the `cooperative_period` option. See the example
config for more information.
* Invalid `hashes.invalid` entries are now ignored, rather than
causing a complete partition rehash.
* Prefix-based tempurls may now be used to explore staticweb
listings within that prefix. Note that this opens a new ability
to list containers from tempurls, but only if staticweb's
`X-Container-Meta-Web-Listings` is enabled.
* When generating index pages from listings, staticweb now sends an HTML5
doctype. This makes them https://peps.python.org/pep-0503/ compliant,
allowing their continued use for simple Python package repositories.
* Per-service `auto_create_account_prefix` configuration options have
been removed. These options were deprecated in favor of `swift.conf`
configuration in Swift 2.24.0, part of the OpenStack Ussuri release.
* Added a `swift-reload` command to assist with safely reloading WSGI
servers.
* Daemons now send `STOPPING` and `RELOADING` systemd notifications
when the service is configured with `Type=notify`.
* Added more metrics to the container-server, allowing GET and PUT timings
to be broken out for listings, shard range operations, and container
creation.
* Daemons send object updates via the replication network in more cases.
* `swift-account-info` and `swift-container-info` now accept a `--sync`
flag to show information from the incoming/outgoing sync tables.
* Several fixes to prepare for Python 3.12 support. While not yet tested
in the gate, initial manual testing looks promising.
* Added support for recent versions of eventlet.
* The dark-data object audit watcher now works with sharded containers.
Previously, it would think that all data files were absent from
listings.
* Various other minor bug fixes and improvements.
swift (2.32.0, OpenStack Bobcat)
* Python 3 fixes:
* Python 3 object servers can now read unencrypted non-ASCII metadata
that was written under Python 2.
* Ssync no longer corrupts unencrypted non-ASCII metadata during
transfers.
* Fixed an encoding issue when writing non-ASCII object names to sharded
containers and shard range caching is not enabled.
* Fixed an encoding issue when handling non-ASCII account names.
* Fixed a `generator already executing` error on client disconnect.
* Suppressed `RemoteDisconnected` tracebacks.
* Metrics improvements:
* Metrics are now emitted for a variety of S3 error responses, in the
form `s3api.<status_int>.<error_class>[.<reason>]`
* Fixed an issue that prevented proxy servers from emitting metrics and
logs for backend requests made when getting account or container info.
* Account and container info metrics now include the response status code
when backend requests are made.
* Added timing metrics to the container sharder for various operations.
* Python 3.11 is now supported.
* Added the ability for reseller admins to set per-policy account quotas by
posting metadata of the form `X-Account-Quota-Bytes-Policy-<policy name>`.
* Added a `keepalive_timeout` option to the proxy server to limit how long
to wait for a client to initiate a request, separate from the general
`client_timeout` option. Note that this requires eventlet 0.34.0
(currently unreleased) or later.
* Added a `keep_cache_slo_manifest` option to the object server to better
control whether SLO manifests are dropped from the page cache.
* WSGI servers now accept a `--test-config` option that may be used to
validate configuration changes before reloading/restarting the server.
* The structure of cached shard ranges has changed, improving performance
when listing or writing to sharded containers. Note that immediately
after upgrade, the new structures will all be cache misses, which may
lead to a thundering herd problem. To avoid this, upgrade just a few
nodes first, let them service some fraction of traffic to populate the
cache, then upgrade the rest of the cluster.
* A variety of performance improvements have been made for sharded
container databases.
* Various logging and metrics improvements when talking to memcache.
* Fixed ssync's handling of timestamp offsets. Previously, this could cause
ssync to fail with a 409 Conflict, causing the transfer to fail and
preventing handoffs from clearing.
* Fixed an issue where an erasure-coded PUT could prevent other requests
from being processed when network calls rarely or never blocked.
* Fixed an issue when downloading an SLO manifest would hit a recoverable
error and attempt to resume from another node. This would manifest as
either a pyeclib decode error or an unexpected empty response.
* The proxy server now applies error-limiting to the correct node when
handling a recoverable node error.
* Account, container, and object log fields are now correctly identified
when returning `BadDigest` responses to S3 requests.
* Previously, under some circumstances, a non-standard config option such
as `RECLAIM_AGE` might get parsed as `reclaim_age` for some processes
but ignored by others. Now, all config parsing is case-sensitive;
non-standard names will always be ignored.
* Reduced the backend load of making `?versions` requests to a container
that has never had object versioning enabled.
* Improved formatting of meta and sysmeta for `swift-account-info` and
`swift-container-info`.
* The standard-library `logging` module is no longer monkey-patched when
importing `swift.common.utils`, making it easier to re-use swift code
in other contexts.
* Removed the hard dependency on netifaces; it may still be used if the
`getifaddrs` C function is not available. This fallback support may be
removed in a future release.
* Various other minor bug fixes and improvements.
swift (2.31.1, OpenStack Antelope)
* Sharding fixes
* Shards no longer report stats to the root database when they are in
the CREATED state.
* Sharding metadata is no longer cleared when databases are deleted.
This could previously cause deleted shards that still had rows to
become stuck and never move them to the correct database.
* Fixed a performance regression in the handling of misplaced objects.
* Swift path and on-disk path are now included with all sharder logging.
* `s3token` no longer mangles request paths that include the Access Key ID.
* User metadata is now exposed via CORS when encryption is enabled,
matching the behavior when encryption is not enabled.
* Fewer backend requests are now required when account or container
information is missing from memcache.
* Fixed logging of IP and port in the proxy-server; in particular,
internal clients now correctly log about the replication IP/port.
* Fixed a bug in the object replicator that would cause an under-reporting
of failures.
* Various other minor bug fixes.
swift (2.31.0)
* S3 API improvements
* Fixed a security issue in how `s3api` handles XML parsing that allowed
authenticated S3 clients to read arbitrary files from proxy servers.
Refer to CVE-2022-47950 for more information.
* Fixed a server error when handling malformed CompleteMultipartUpload
requests.
* Improved error reporting when attempting to set invalid `X-Delete-At`
or `X-Delete-After` values via the S3 API.
* Sharding improvements
* Sync more shard ranges from the root database to the shards. This
helps ensure shard range repairs effected at the root make their way
to shards that would otherwise be stuck trying to further divide
into sub-shards.
* Added a `merge` subcommand to `swift-manage-shard-ranges` to merge
arbitrary shard ranges into a container DB. Minimal safety checks
are performed; it should only be used for emergency shard range
manipulation by expert users.
* Improved performance of `delimiter` listings for sharded containers.
* Added more safety checks to the `repair` subcommand of
`swift-manage-shard-ranges`.
* Better handle `EOFError` and `KeyboardInterrupt` when prompting for
input in `swift-manage-shard-ranges`.
* Warnings are now emitted when sharding appears to have become stuck.
Use the new `container_sharding_timeout` option to configure the
"stuck" threshold; the default is 48 hours.
* Stop warning about transient overlaps when auditing shard ranges.
* Metrics improvements
* Added timing stats for memcached operations.
* Renamed and improved the granularity of shard range cache and
backend stats. Metrics dashboards may need to be updated.
* Emit stats when backend nodes are error-limited.
* Added support for Python 3.10.
* Added an optional `backend_ratelimit` middleware for backend servers.
See the backend server sample configuration files for more information.
* Added the ability to configure a chance to skip checking memcache when
querying account and container information. This allows some fraction
of traffic to go to disk and refresh memcache before the key ages out.
Recommended values for the new `account_existence_skip_cache_pct` and
`container_existence_skip_cache_pct` options are in the range of
0.0 to 0.01.
* Static large object segments may now be deleted asynchronously by
default. Operators may return to the old behavior by disabling the
`allow_async_delete` option in the `[filter:slo]` section
in their proxy-server.conf.
* Absolute-form request targets are now accepted. This enables access for
certain clients and SDKs (including some older versions of rclone that
were using an old version of aws-sdk-go).
* Fixed a path-rewriting bug introduced in Python 3.7.14, 3.8.14, 3.9.14,
and 3.10.6 that could cause some `domain_remap` requests to be routed to
the wrong object.
* Fixed a server error when attempting to access data in a deleted
container that had an erasure-coded storage policy.
* Improved error messages to clients that encounter errors using the
`formpost` middleware.
* Removed some inappropriate error-suppression when locking account and
container databases.
* Improved server start-up time when using multiple workers.
* Removed some unnecessary locking when logging.
* Added some basic object-metadata validation; invalid diskfiles will be
quarantined via the auditor or reconstructor.
* Enhanced logging when error-limiting a backend node.
* Various other minor bug fixes and improvements.
swift (2.30.1, zed stable backports)
* Fixed a security issue in how `s3api` handles XML parsing that allowed
authenticated S3 clients to read arbitrary files from proxy servers.
Refer to CVE-2022-47950 for more information.
* Fixed a path-rewriting bug introduced in Python 3.7.14, 3.8.14, 3.9.14,
and 3.10.6 that could cause some `domain_remap` requests to be routed to
the wrong object.
swift (2.30.0, OpenStack Zed)
* Sharding improvements
* The `swift-manage-shard-ranges` tool has a new mode to repair gaps
in the namespace.
* Misplaced tombstone records are now properly cleaved.
* Fixed a bug where the sharder could fail to find a device to use for
cleaving.
* Databases marked deleted are now processed by the sharder.
* More information is now synced to the fresh database when sharding.
Previously, a database could lose the fact that it had been marked
as deleted.
* Shard ranges with no rows to cleave could previously be left in the
CREATED state after cleaving. Now, they are advanced to CLEAVED.
* Metrics are now emitted for whether databases used for cleaving
were created or already existed, allowing a better understanding
of the reason for handoffs in the cluster.
* Misplaced-record stats are now also emitted to statsd. Previously,
these were only available in logs.
* S3 API improvements
* Constant-time string comparisons are now used when checking signatures.
* Fixed cross-policy object copies. Previously, copied data would
always be written using the source container's policy. Now, the
destination container's policy will be used, avoiding availability
issues and unnecessary container-reconciler work.
* More headers are now copied from multi-part upload markers to their
completed objects, including `Content-Encoding`.
* When running with `s3_acl` disabled, `bucket-owner-full-control` and
`bucket-owner-read` canned ACLs will be translated to the same Swift
ACLs as `private`.
* The S3 ACL and Delete Multiple APIs are now less case-sensitive.
* Improved the error message when deleting a bucket that's ever had
versioning enabled and still has versions in it.
* `LastModified` timestamps in listings are now rounded up to whole
seconds, like they are in responses from AWS.
* Proxy logging for Complete Multipart Upload requests is now more
consistent when requests have been retried.
* Logging improvements
* Signal handling is more consistently logged at notice level.
Previously, signal handling would sometimes be logged at info
or error levels.
* The message template for proxy logging may now include a
`{domain}` field for the client-provided `Host` header.
* The object-replicator now logs successful rsync transfers at debug
instead of info.
* Added a `log_rsync_transfers` option to the object-replicator.
Set it to false to disable logging rsync "send" lines; during
large rebalances, such logging can overwhelm log aggregation
while providing little useful information.
* Transaction IDs are now only included in daemon log lines
in a request/response context.
* Fixed a socket leak when clients try to delete a non-SLO as though
it were a Static Large Object.
* The formpost digest algorithm is now configurable via the new
`allowed_digests` option, and support is added for both SHA-256
and SHA-512. Supported formpost digests are exposed to clients in
`/info`. Additionally, formpost signatures can now be base64 encoded.
* Added metrics to the formpost and tempurl middlewares to monitor
digest usage in signatures.
* SHA-1 signatures are now deprecated for the formpost and tempurl
middlewares. At some point in the future, SHA-1 will no longer be
enabled by default; eventually, support for it will be removed
entirely.
* Improved compatibility with certain FIPS-mode-enabled systems.
* Added a `ring_ip` option for various object services. This may be
used to find own devices in the ring in a containerized environment
where the `bind_ip` may not appear in the ring at all.
* Account and container replicators can now be configured with a
`handoff_delete` option, similar to object replicators and
reconstructors. See the sample config for more information.
* Developers using Swift's memcache client may now opt in to having
a `MemcacheConnectionError` be raised when no connection succeeded
using a new `raise_on_error` keyword argument to `get`/`set`.
* The tempurl middleware has been updated to return a 503 if storing a
token in memcache fails. Third party authentication middlewares are
encouraged to also use the new `raise_on_error` keyword argument
when storing ephemeral tokens in memcache.
* Pickle support has been removed from Swift's memcache client. Support
had been deprecated since Swift 1.7.0.
* Device names are now included in new database IDs. This provides more
context when examining incoming/outgoing sync tables or sharding
CleaveContexts.
* Database replication connections are now closed following an error
or timeout. This prevents a traceback in some cases when the replicator
tries to reuse the connection.
* `ENOENT` and `ENODATA` errors are better handled in the object
replicator and auditor.
* Improved object update throughput by shifting some shard range
filtering from Python to SQL.
* Include `Vary: Origin` header when CORS responses vary by origin.
* The staticweb middleware now allows empty listings at the root of
a container. Previously, this would result in a 404 response.
* Ring builder output tables better display weights over 1000.
* Various other minor bug fixes and improvements.
swift (2.29.2, yoga stable backports)
* Fixed a security issue in how `s3api` handles XML parsing that allowed
authenticated S3 clients to read arbitrary files from proxy servers.
Refer to CVE-2022-47950 for more information.
* Constant-time string comparisons are now used when checking S3 API
signatures.
* Fixed a path-rewriting bug introduced in Python 3.7.14, 3.8.14, 3.9.14,
and 3.10.6 that could cause some `domain_remap` requests to be routed to
the wrong object.
* Improved compatibility with certain FIPS-mode-enabled systems.
swift (2.29.1, OpenStack Yoga)
* This is the final stable branch that will support Python 2.7.
* Fixed s3v4 signature calculation when the client sends an un-encoded
path in the request.
* Fixed multiple issues in s3api involving Multipart Uploads with
non-ASCII names.
* The object-updater now defers rate-limited updates to the end of its
cycle; these deferred updates will be processed (at the limited rate)
until the configured `interval` elapses. A new `max_deferred_updates`
option may be used to bound the deferral queue.
* Empty account and container partition directories are now cleaned up
immediately after replication, rather than needing to wait for an
additional replication cycle.
* The object-expirer now only cleans up empty containers. Previously, it
would attempt to delete all processed containers, regardless of whether
there were entries which were skipped or had errors.
* A new `item_size_warning_threshold` option may be used to monitor for
values that are approaching the limit of what can be stored in memcache.
See the memcache sample config for more information.
* Internal clients now correctly use their configured User-Agent in
backend requests, rather than only using it for logging.
* Various other minor bug fixes and improvements.
swift (2.29.0)
* S3 API improvements
* CORS preflights are now allowed for pre-signed URLs.
* The `storage_domain` option now accepts a comma-separated list of
storage domains. This allows multiple storage domains to configured
for use with virtual-host style addressing.
* Fixed the types of configured values in /info response.
* Fixed a server error when trying to copy objects with non-ASCII names.
* Fixed a server error when uploading objects with very long names.
A KeyTooLongError is now returned.
* Fixed an error when multi-deleting MPUs when SLO async-deletes
are enabled.
* Fixed an error that allowed list-uploads and list-parts requests to
return incomplete or out-of-order results.
* Fixed several bugs when dealing with non-ASCII object names and
multipart uploads.
* Reduced the overhead of retrieving bucket and object ACLs.
* Replication, reconstruction, and diskfile improvements
* The reconstructor now uses the replication network to fetch fragments
for reconstruction.
* Added the ability to limit how many objects per handoff partition
will be reverted in a reconstructor cycle using the new
`max_objects_per_revert` option. This may be useful to reduce
ssync timeouts and lock contention, ensuring that progress is made
during rebalances.
* Ensure that non-durable data and .meta files are purged from handoffs
after syncing.
* Fixed tracebacks when there's a race to mark a file durable or delete it.
* Improved cooperative multitasking during ssync.
* Upon detecting a ring change, the reconstructor now only aborts the
jobs for that ring and continues processing jobs for other rings.
* Fixed a traceback when logging about a lock timeout in the replicator.
* Object updater improvements
* Added the ability to ratelimit updates (approximately) per-container
using the new `max_objects_per_container_per_second` option. This may
be used to limit requests to already-overloaded containers while still
making progress on updates to other containers.
* Added timing stats by response code.
* Updates are now sent over the replication network.
* Fixed a race condition where swift would attempt to quarantine
recently-deleted updates.
* Memcache improvements
* Added the ability to configure a chance to skip checking memcache when
querying shard ranges. This allows some fraction of traffic to go to
disk and refresh memcache before the key ages out. Recommended values
for the new `container_updating_shard_ranges_skip_cache_pct` and
`container_listing_shard_ranges_skip_cache_pct` options are in the
range of 0.0 to 0.1.
* Added stats for shard range cache hits, misses, and skips.
* Improved handling of timeouts and other errors when obtaining a
connection to memcached.
* Recon improvements
* Added object-reconstructor stats to recon.
* Each object-server IP is now queried only once when reporting disk
usage. Previously, each port in the ring would be queried; when using
servers-per-port, this could dramatically overstate the disk capacity
in the cluster.
* Fixed a security issue where tempurl and s3api signatures were logged in
full. This allowed an attacker with access to log data to perform replay
attacks, potentially accessing or overwriting cluster data. Now, such
signatures are redacted in a manner similar to auth tokens; see the
`reveal_sensitive_prefix` option in `proxy-server.conf`.
See CVE-2017-8761 for more information.
* Added a new `swift.common.registry` module. This includes helper
functions `register_sensitive_header` and `register_sensitive_param`
which third party middleware authors may use to flag headers and query
parameters for redaction when logging. For more information, see
https://docs.openstack.org/swift/latest/misc.html#module-swift.common.registry
* Added the ability to configure project-scope read-only roles for
keystoneauth using the new `project_reader_roles` option.
* The cname_lookup middleware now works with dnspython 2.0 and later.
* The internal clients used by the container-reconciler, container-sharder,
container-sync, and object-expirer daemons now use a more-descriptive
`<daemon>-ic` log name, rather than `swift`. If you previously
configured the `log_name` option in `internal-client.conf`, you must
now use the `set log_name = <value>` syntax to configure it, even if
no value is set in the `[DEFAULT]` section. This may be done prior to
upgrading.
* Fixed a bug that allowed some statsd metrics to be annotated with the
wrong backend layer.
* The `StatsdClient.set_prefix` method is now deprecated and
may be removed in a future release; by extension, so is the
`LogAdapter.set_statsd_prefix` method. Middleware developers should
use the `statsd_tail_prefix` argument to `get_logger` instead.
* Fixed a traceback in the account-server when there's no account
database on disk to receive a container update. The account-server
now correctly 404s.
* The container-updater will quarantine container databases if all
replicas for the account respond 404.
* Fixed a proxy-server error when the read-only middleware tried to
handle non-Swift paths (such as may be used by third-party middleware).
* Some client behaviors that the proxy previously logged at warning have
been lowered to info.
* Removed translations from most logging.
* Various other minor bug fixes and improvements.
swift (2.28.1, xena stable backports)
* Fixed a security issue in how `s3api` handles XML parsing that allowed
authenticated S3 clients to read arbitrary files from proxy servers.
Refer to CVE-2022-47950 for more information.
* Constant-time string comparisons are now used when checking S3 API
signatures.
* Fixed a path-rewriting bug introduced in Python 3.7.14, 3.8.14, 3.9.14,
and 3.10.6 that could cause some `domain_remap` requests to be routed to
the wrong object.
* Improved compatibility with certain FIPS-mode-enabled systems.
* Ensure that non-durable data and .meta files are purged from handoffs
after syncing.
swift (2.28.0, OpenStack Xena)
* Sharding improvements:
* When building a listing from shards, any failure to retrieve
listings will result in a 503 response. Previously, failures
fetching a partiucular shard would result in a gap in listings.
* Container-server logs now include the shard path in the referer
field when receiving stat updates.
* Added a new config option, `rows_per_shard`, to specify how many
objects should be in each shard when scanning for ranges. The default
is `shard_container_threshold / 2`, preserving existing behavior.
* Added a new config option, `minimum_shard_size`. When scanning
for shard ranges, if the final shard would otherwise contain
fewer than this many objects, the previous shard will instead
be expanded to the end of the namespace (and so may contain up
to `rows_per_shard + minimum_shard_size` objects). This reduces
the number of small shards generated. The default value is
`rows_per_shard / 5`.
* Added a new config option, `shrink_threshold`, to specify the
absolute size below which a shard will be considered for shrinking.
This overrides the `shard_shrink_point` configuration option, which
expressed this as a percentage of `shard_container_threshold`.
`shard_shrink_point` is now deprecated.
* Similar to above, `expansion_limit` was added as an absolute-size
replacement for the now-deprecated `shard_shrink_merge_point`
configuration option.
* The sharder now correctly identifies and fails audits for shard
ranges that overlap exactly.
* The sharder and swift-manage-shard-ranges now consider total row
count (instead of just object count) when deciding whether a shard
is a candidate for shrinking.
* If the sharder encounters shard range gaps while cleaving, it will
now log an error and halt sharding progress. Previously, rows may
not have been moved properly, leading to data loss.
* Sharding cycle time and last-completion time are now available via
swift-recon.
* Fixed an issue where resolving overlapping shard ranges via shrinking
could prematurely mark created or cleaved shards as active.
* `swift-manage-shard-ranges` improvements:
* Exit codes are now applied more consistently:
- 0 for success
- 1 for an unexpected outcome
- 2 for invalid options
- 3 for user exit
As a result, some errors that previously resulted in exit code 2
will now exit with code 1.
* Added a new 'repair' command to automatically identify and
optionally resolve overlapping shard ranges.
* Added a new 'analyze' command to automatically identify overlapping
shard ranges and recommend a resolution based on a JSON listing
of shard ranges such as produced by the 'show' command.
* Added a `--includes` option for the 'show' command to only output
shard ranges that may include a given object name.
* Added a `--dry-run` option for the 'compact' command.
* The 'compact' command now outputs the total number of compactible
sequences.
* S3 API improvements:
* Added an option, `ratelimit_as_client_error`, to return 429s for
rate-limited responses. Several clients/SDKs have seem to support
retries with backoffs on 429, and having it as a client error
cleans up logging and metrics. By default, Swift will respond 503,
matching AWS documentation.
* Fixed a server error in bucket listings when `s3_acl` is enabled
and staticweb is configured for the container.
* Fixed a server error when a client exceeds `client_timeout` during an
upload. Now, a `RequestTimeout` error is correctly returned.
* Fixed a server error when downloading multipart uploads/static large
objects that have missing or inaccessible segments. This is a state
that cannot arise in AWS, so a new `BrokenMPU` error is returned,
indicating that retrying the request is unlikely to succeed.
* Fixed several issues with the prefix, marker, and delimiter
parameters that would be mirrored back to clients when listing
buckets.
* Partition power increase improvements:
* The relinker now spawns multiple subprocesses to process disks
in parallel. By default, one worker is spawned per disk; use the
new `--workers` option to control how many subprocesses are used.
Use `--workers=0` to maintain the previous behavior.
* The relinker now performs eventlet-hub selection the same way as
other daemons. In particular, `epolls` will no longer be selected,
as it seemed to cause occassional hangs.
* The relinker can now target specific storage policies or
partitions by using the new `--policy` and `--partition`
options.
* Partitions that encountered errors during relinking are no longer
marked as completed in the relinker state file. This ensures that
a subsequent relink will retry the failed partitions.
* Partition cleanup is more robust, decreasing the likelihood of
leaving behind mostly-empty partitions from the old partition
power.
* Improved relinker progress logging, and started collecting
progress information for swift-recon.
* Cleanup is more robust to files and directories being deleted by
another process.
* The relinker better handles data found from earlier partition power
increases.
* The relinker better handles tombstones found for the same object
but with different inodes.
* The reconciler now defers working on policies that have a partition
power increase in progress to avoid issues with concurrent writes.
* Erasure coding fixes:
* Added the ability to quarantine EC fragments that have no (or few)
other fragments in the cluster. A new configuration option,
`quarantine_threshold`, in the reconstructor controls the point at
the fragment will be quarantined; the default (0) will never
quarantine. Only fragments older than `quarantine_age` (default:
`reclaim_age`) may be quarantined. Before quarantining, the
reconstructor will attempt to fetch fragments from handoff nodes
in addition to the usual primary nodes; a new `request_node_count`
option (default `2 * replicas`) limits the total number of nodes to
contact.
* Added a delay before deleting non-durable data. A new configuration
option, `commit_window` in the `[DEFAULT]` section of
object-server.conf, adjusts this delay; the default is 60 seconds. This
improves the durability of both back-dated PUTs (from the reconciler or
container-sync, for example) and fresh writes to handoffs by preventing
the reconstructor from deleting data that the object-server was still
writing.
* Improved proxy-server and object-reconstructor logging when data
cannot be reconstructed.
* Fixed an issue where some but not all fragments having metadata
applied could prevent reconstruction of missing fragments.
* Server-side copying of erasure-coded data to a replicated policy no
longer copies EC sysmeta. The previous behavior had no material
effect, but could confuse operators examining data on disk.
* Python 3 fixes:
* Fixed a server error when performing a PUT authorized via
tempurl with some proxy pipelines.
* Fixed a server error during GET of a symlink with some proxy
pipelines.
* Fixed an issue with logging setup when /dev/log doesn't exist
or is not a UNIX socket.
* The container-reconciler now scales out better with new `processes`,
`process`, and `concurrency` options, similar to the object-expirer.
* The dark-data audit watcher now skips objects younger than a new
configurable `grace_age` period. This avoids issues where data
could be flagged, quarantined, or deleted because of listing
consistency issues. The default is one week.
* The dark-data audit watcher now requires that all primary locations
for an object's container agree that the data does not appear in
listings to consider data "dark". Previously, a network partition
that left an object node isolated could cause it to quarantine or
delete all of its data.
* More daemons now support systemd notify sockets.
* `EPIPE` errors no longer log tracebacks.
* The account and container auditors now log and update recon before
going to sleep.
* The object-expirer logs fewer client disconnects.
* `swift-recon-cron` now includes the last time it was run in the recon
information.