Files

Olivier 'reivilibre 52fb6e98ac Support sending and receiving MSC4354 Sticky Event metadata. (#19365 )

Part of: MSC4354 whose experimental feature tracking issue is
https://github.com/element-hq/synapse/issues/19409

Follows: #19340 (a necessary bugfix for `/event/` to set this metadata)

Partially supersedes: #18968

This PR implements the first batch of work to support MSC4354 Sticky
Events.

Sticky events are events that have been configured with a finite
'stickiness' duration,
capped to 1 hour per current MSC draft.

Whilst an event is sticky, we provide stronger delivery guarantees for
the event, both to
our clients and to remote homeservers, essentially making it reliable
delivery as long as we
have a functional connection to the client/server and until the
stickiness expires.

This PR merely supports creating sticky events and receiving the sticky
TTL metadata in clients.
It is not suitable for trialling sticky events since none of the other
semantics are implemented.

Contains a temporary SQLite workaround due to a bug in our supported
version enforcement: https://github.com/element-hq/synapse/issues/19452

---------

Signed-off-by: Olivier 'reivilibre <oliverw@matrix.org>
Co-authored-by: Eric Eastwood <erice@element.io>

2026-02-11 12:41:38 +00:00

conf

Support sending and receiving MSC4354 Sticky Event metadata. (#19365 )

2026-02-11 12:41:38 +00:00

Dockerfile

Remove support for PostgreSQL 13 (#19170 )

2025-11-13 19:38:59 +00:00

README.md

Better complement docs (#16946 )

2024-02-20 17:14:50 +00:00

README.md

Unified Complement image for Synapse

This is an image for testing Synapse with the Complement integration test suite. It contains some insecure defaults that are only suitable for testing purposes, so please don't use this image for a production server.

This multi-purpose image is built on top of Dockerfile-workers in the parent directory and can be switched using environment variables between the following configurations:

Monolithic Synapse with SQLite (default, or SYNAPSE_COMPLEMENT_DATABASE=sqlite)
Monolithic Synapse with Postgres (SYNAPSE_COMPLEMENT_DATABASE=postgres)
Workerised Synapse with Postgres (SYNAPSE_COMPLEMENT_DATABASE=postgres and SYNAPSE_COMPLEMENT_USE_WORKERS=true)

The image is self-contained; it contains an integrated Postgres, Redis and Nginx.

How to get Complement to pass the environment variables through

To pass these environment variables, use Complement's COMPLEMENT_SHARE_ENV_PREFIX variable to configure an environment prefix to pass through, then prefix the above options with that prefix.

Example:

COMPLEMENT_SHARE_ENV_PREFIX=PASS_ PASS_SYNAPSE_COMPLEMENT_DATABASE=postgres

Consult scripts-dev/complement.sh in the repository root for a real example.

How to modify homeserver.yaml for Complement tests

It's common for MSCs to be gated behind a feature flag like this:

experimental_features:
  faster_joins: true

To modify this for the Complement image, modify ./conf/workers-shared-extra.yaml.j2. Despite the name, this will affect non-worker mode as well. Remember to rebuild the image (so don't use -e if using complement.sh).