Synapse 0.27 released!

We released Synapse v0.27.2 today (the first stable release in the 0.27.x series) - it contains loads of work since Synapse v0.26 back in January.  The main highlights are:

• All the perf improvements which we've been landing as we race to keep the matrix.org homeserver in the face of ever-expanding traffic levels over the last few months
• Support for custom storage providers for media repository.
• Ability to limit the email addresses allowed to register on your HS, and ability to limit the homeservers your homeserver is allowed to federate with
• All new purge API - letting you purge history by date as well as by event (and having a nice new async way of doing it)
• Make search work again!!! (by switching from GIST to GIN indexes)

And a few release notes worth calling out:

• The common case for running Synapse is not to run separate workers, but for those that do, be aware that synctl no longer starts the main synapse when using -a option with workers. A new worker file should be added with worker_app: synapse.app.homeserver.
• This release also begins the process of renaming a number of the metrics reported to prometheus. See docs/metrics-howto.rst  Note that the v0.28.0 release will remove the deprecated metric names.

As always, you can get it from https://github.com/matrix-org/synapse/releases/tag/v0.27.2

thanks for flying Matrix!

Changes in synapse v0.27.2 (2018-03-26)

Bug fixes:

• Fix bug which broke TCP replication between workers (PR #3015)

Changes in synapse v0.27.1 (2018-03-26)

Meta release as v0.27.0 temporarily pointed to the wrong commit

Changes in synapse v0.27.0 (2018-03-26)

No changes since v0.27.0-rc2

Changes in synapse v0.27.0-rc2 (2018-03-19)

Pulls in v0.26.1

Bug fixes:

• Fix bug introduced in v0.27.0-rc1 that causes much increased memory usage in state cache (PR #3005)

Changes in synapse v0.27.0-rc1 (2018-03-14)

The common case for running Synapse is not to run separate workers, but for those that do, be aware that synctl no longer starts the main synapse when using -a option with workers. A new worker file should be added with worker_app: synapse.app.homeserver.

This release also begins the process of renaming a number of the metrics reported to prometheus. See docs/metrics-howto.rst <docs/metrics-howto.rst#block-and-response-metrics-renamed-for-0-27-0>_. Note that the v0.28.0 release will remove the deprecated metric names.

Features:

• Add ability for ASes to override message send time (PR #2754)
• Add support for custom storage providers for media repository (PR #2867, #2777, #2783, #2789, #2791, #2804, #2812, #2814, #2857, #2868, #2767)
• Add purge API features, see docs/admin_api/purge_history_api.rst <docs/admin_api/purge_history_api.rst>_ for full details (PR #2858, #2867, #2882, #2946, #2962, #2943)
• Add support for whitelisting 3PIDs that users can register. (PR #2813)
• Add /room/{'{'}id{'}'}/event/{'{'}id{'}'} API (PR #2766)
• Add an admin API to get all the media in a room (PR #2818) Thanks to @turt2live!
• Add federation_domain_whitelist option (PR #2820, #2821)

Changes:

• Continue to factor out processing from main process and into worker processes. See updated docs/workers.rst <docs/metrics-howto.rst>_ (PR #2892 - #2904, #2913, #2920 - #2926, #2947, #2847, #2854, #2872, #2873, #2874, #2928, #2929, #2934, #2856, #2976 - #2984, #2987 - #2989, #2991 - #2993, #2995, #2784)
• Ensure state cache is used when persisting events (PR #2864, #2871, #2802, #2835, #2836, #2841, #2842, #2849)
• Change the default config to bind on both IPv4 and IPv6 on all platforms (PR #2435) Thanks to @silkeh!
• No longer require a specific version of saml2 (PR #2695) Thanks to @okurz!
• Remove verbosity/log_file from generated config (PR #2755)
• Add and improve metrics and logging (PR #2770, #2778, #2785, #2786, #2787, #2793, #2794, #2795, #2809, #2810, #2833, #2834, #2844, #2965, #2927, #2975, #2790, #2796, #2838)
• When using synctl with workers, don't start the main synapse automatically (PR #2774)
• Minor performance improvements (PR #2773, #2792)
• Use a connection pool for non-federation outbound connections (PR #2817)
• Make it possible to run unit tests against postgres (PR #2829)
• Update pynacl dependency to 1.2.1 or higher (PR #2888) Thanks to @bachp!
• Remove ability for AS users to call /events and /sync (PR #2948)
• Use bcrypt.checkpw (PR #2949) Thanks to @krombel!

Bug fixes:

• Fix broken ldap_config config option (PR #2683) Thanks to @seckrv!
• Fix error message when user is not allowed to unban (PR #2761) Thanks to @turt2live!
• Fix publicised groups GET API (singular) over federation (PR #2772)
• Fix user directory when using user_directory_search_all_users config option (PR #2803, #2831)
• Fix error on /publicRooms when no rooms exist (PR #2827)
• Fix bug in quarantine_media (PR #2837)
• Fix url_previews when no Content-Type is returned from URL (PR #2845)
• Fix rare race in sync API when joining room (PR #2944)
• Fix slow event search, switch back from GIST to GIN indexes (PR #2769, #2848)