Kinto-dist

**Operational concerns**

- *The schema for the Postgres storage backend has changed.* This
changes some more ID columns to use the "C" collation, which fixes a
bug where the ``bump_timestamps`` trigger was very slow.

**Internal changes**

- Update the Docker compose configuration to use memcache for the cache backend (1405)
- Refactor the way postgresql.storage.create_from_settings ignores settings (1410)

**Operational concerns**

- *The schema for the Postgres storage backend has changed.* This
changes some ID columns to use the "C" collation, which will make
``delete_all`` queries faster. (See
e.g. https://www.postgresql.org/docs/9.6/static/indexes-opclass.html,
which says "If you do use the C locale, you do not need the
xxx_pattern_ops operator classes, because an index with the default
operator class is usable for pattern-matching queries in the C
locale.") This may change the default sort order and grouping of
record IDs.

**New features**

- New setting ``kinto.backoff_percentage`` to only set the backoff header a portion of the time.
- ``make tdd`` allows development in a TDD style by rerunning tests every time a file is changed.

**Bug fixes**

- Optimize the Postgres collection_timestamp method by one query. It
now only makes two queries instead of three.
- Update other dependencies: newrelic to 2.98.0.81 (1409), setuptools
to 38.4.0 (1411, 1429, 1438, 1440), pytest to 3.3.2 (1412,
1437), raven to 6.4.0 (1421), werkzeug to 0.14.1 (1418, 1434),
python-memcached to 1.59 (1423), zest.releaser to 6.13.3 (1427),
bravado_core to 4.11.2 (1426, 1441), statsd to 3.2.2 (1422),
jsonpatch to 1.21 (1432), sqlalchemy to 1.2.0 (1430), sphinx to
1.6.6 (1442).


kinto-signer
------------

==================

- Fix CircleCI job execution for tags (fixes 233)

==================

- Fix Docker Hub publication issue from CircleCI

**Operational concerns**

- *The schema for the Postgres ``storage`` backend has changed.* This
lets us prevent a race condition where deleting and creating a thing
at the same time can leave it in an inconsistent state (1386). You
will have to run the ``kinto migrate`` command in order to migrate
the schema. The safest way to do this is to disable Kinto traffic
(perhaps using nginx), bring down the old Kinto service, run the
migration, and then bring up the new Kinto service.

**Breaking changes**

- Storage backends no longer support the ``ignore_conflict``
argument (1401). Instead of using this argument, consider catching the
``UnicityError`` and handling it. ``ignore_conflict`` was only ever
used in one place, in the ``default_bucket`` plugin, and was
eventually backed out in favor of catching and handling a
``UnicityError``.

**Bug fixes**

- Fix a TOCTOU bug in the Postgres storage backend where a transaction
doing a `create()` would fail because a row had been inserted after
the transaction had checked for it (1376).
- Document how to create an account using the ``POST /accounts`` endpoint (1385).

**Internal changes**

- Update dependency on pytest to move to 3.3.0 (1403).
- Update other dependencies: setuptools to 38.2.1 (1380, 1381,
1392, 1395), jsonpatch to 1.20 (1393), zest.releaser to 6.13.2
(1397), paste-deploy to 0.4.2 (1384), webob to 1.7.4 (1383),
simplejson to 3.13.2 (1389, 1390).
- Undo workaround for broken kinto-http.js in the kinto-admin plugin
(1382).

**Protocol**

- When a record is pushed with an older timestamp, the collection
timestamps is not bumped anymore. (Kinto/kinto1361)

**New features**

- A new custom logging formatter is available in ``kinto.core``. It fixes the issues of
`mozilla-cloud-services-logger <https://github.com/mozilla/mozilla-cloud-services-logger>`_.
Consider migrating your logging settings to :

::

[formatter_json]
class = kinto.core.JsonLogFormatter

**Bug fixes**

- Do not log empty context values (Kinto/kinto1363)
- Fixed some attributes in logging of errors (Kinto/kinto1363)
- Fixed logging of method/path of batch subrequests (Kinto/kinto1363)
- Fix removing permissions with Json Merge (Kinto/kinto1322).


**Internal changes**

- Moved PostgreSQL helper function to Python code (Kinto/kinto1358)


kinto-changes
-------------