Dendrite is a second-generation Matrix homeserver written in Go!
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Use AckExplicitPolicy instead of AckAllPolicy (#3288)
Fixes https://github.com/matrix-org/dendrite/issues/3240 and potentially
a root cause for state resets.

While testing, I've had added some more debug logging:
```
time="2023-12-16T18:13:11.319458084Z" level=warning msg="already processed event" event_id="$qFYMl_F2vb1N0yxmvlFAMhqhGhLKq4kA-o_YCQKH7tQ" kind=KindNew times=2
time="2023-12-16T18:13:14.537389126Z" level=warning msg="already processed event" event_id="$EU-LTsKErT6Mt1k12-p_3xOHfiLaK6gtwVDlZ35lSuo" kind=KindNew times=5
time="2023-12-16T18:13:16.789551206Z" level=warning msg="already processed event" event_id="$dIPuAfTL5x0VyG873LKPslQeljCSxFT1WKxUtjIMUGE" kind=KindNew times=5
time="2023-12-16T18:13:17.383838767Z" level=warning msg="already processed event" event_id="$7noSZiCkzerpkz_UBO3iatpRnaOiPx-3IXc0GPDQVGE" kind=KindNew times=2
time="2023-12-16T18:13:22.091946597Z" level=warning msg="already processed event" event_id="$3Lvo3Wbi2ol9-nNbQ93N-E2MuGQCJZo5397KkFH-W6E" kind=KindNew times=1
time="2023-12-16T18:13:23.026417446Z" level=warning msg="already processed event" event_id="$lj1xS46zsLBCChhKOLJEG-bu7z-_pq9i_Y2DUIjzGy4" kind=KindNew times=4
```

So we did receive the same event over and over again. Given they are
`KindNew`, we don't short circuit if we already processed them, which
potentially caused the state to be calculated with a now wrong state
snapshot.

Also fixes the back pressure metric. We now correctly increment the
counter once we sent the message to NATS and decrement it once we
actually processed an event.
2023-12-19 08:25:47 +01:00
.github Version 0.13.4 (#3244) 2023-10-25 13:53:40 +02:00
appservice Introduce a new stream for the appservice consumer (#3277) 2023-12-12 12:13:55 +01:00
build Also pin Pinecone and Yggdrasil demo 2023-12-12 17:31:36 +01:00
clientapi Appservice Login (2nd attempt) (#3078) 2023-11-24 22:34:13 +01:00
cmd Use IsBlacklistedOrBackingOff to determine if we should try to fetch devices (#3254) 2023-11-09 08:43:27 +01:00
docs Added Docker commands for Windows (#3267) 2023-11-25 20:24:13 +01:00
federationapi Update ACLs when received as outliers (#3008) 2023-11-22 15:38:04 +01:00
helm Version 0.13.5 (#3285) 2023-12-12 16:55:03 +01:00
internal Version 0.13.5 (#3285) 2023-12-12 16:55:03 +01:00
mediaapi Allow some content types to be inlined (#3274) 2023-12-12 11:15:50 +01:00
relayapi More rows.Close() and rows.Err() (#3262) 2023-11-09 08:42:33 +01:00
roomserver Use AckExplicitPolicy instead of AckAllPolicy (#3288) 2023-12-19 08:25:47 +01:00
setup Introduce a new stream for the appservice consumer (#3277) 2023-12-12 12:13:55 +01:00
syncapi Introduce a new stream for the appservice consumer (#3277) 2023-12-12 12:13:55 +01:00
test Merge SenderID & Per Room User Key work (#3109) 2023-06-14 14:23:46 +00:00
userapi Use IsBlacklistedOrBackingOff to determine if we should try to fetch devices (#3254) 2023-11-09 08:43:27 +01:00
.dockerignore Add revision to version string (#3147) 2023-07-11 13:56:25 +02:00
.gitignore Drop reference_sha column (#3083) 2023-05-24 12:14:42 +02:00
.golangci.yml Tweaks around the device list updater (#3227) 2023-10-23 11:09:05 +02:00
are-we-synapse-yet.list Support for room version v11 (#3204) 2023-09-27 08:27:08 +02:00
are-we-synapse-yet.py Add Are We Synapse Yet to GHA (#2321) 2022-04-05 15:32:30 +02:00
build-dendritejs.sh Add startup testing for Wasm Pinecone build (#1910) 2021-07-20 12:14:58 +01:00
CHANGES.md Version 0.13.5 (#3285) 2023-12-12 16:55:03 +01:00
dendrite-sample.yaml Some tweaks for the device list updater (#3251) 2023-10-31 16:39:45 +01:00
Dockerfile Version 0.13.5 (#3285) 2023-12-12 16:55:03 +01:00
go.mod Use AckExplicitPolicy instead of AckAllPolicy (#3288) 2023-12-19 08:25:47 +01:00
go.sum Use AckExplicitPolicy instead of AckAllPolicy (#3288) 2023-12-19 08:25:47 +01:00
LICENSE Add Apache Version 2.0 license and headers to all golang files 2017-04-21 00:40:52 +02:00
README.md Updated minimum required go version in README.md (#3194) 2023-09-28 07:38:29 +02:00
run-sytest.sh Use /usr/bin/env bash in shebangs to make them universal (#2735) 2022-09-27 09:42:08 +01:00
show-expected-fail-tests.sh Use /usr/bin/env bash in shebangs to make them universal (#2735) 2022-09-27 09:42:08 +01:00
sytest-blacklist Add event size checks similar to Synapse (#3140) 2023-07-07 20:37:23 +02:00
sytest-whitelist Support for room version v11 (#3204) 2023-09-27 08:27:08 +02:00
test-dendritejs.sh Add startup testing for Wasm Pinecone build (#1910) 2021-07-20 12:14:58 +01:00

Dendrite

Build status Dendrite Dendrite Dev

Dendrite is a second-generation Matrix homeserver written in Go. It intends to provide an efficient, reliable and scalable alternative to Synapse:

  • Efficient: A small memory footprint with better baseline performance than an out-of-the-box Synapse.
  • Reliable: Implements the Matrix specification as written, using the same test suite as Synapse as well as a brand new Go test suite.
  • Scalable: can run on multiple machines and eventually scale to massive homeserver deployments.

Dendrite is beta software, which means:

  • Dendrite is ready for early adopters. We recommend running Dendrite with a PostgreSQL database.
  • Dendrite has periodic releases. We intend to release new versions as we fix bugs and land significant features.
  • Dendrite supports database schema upgrades between releases. This means you should never lose your messages when upgrading Dendrite.

This does not mean:

  • Dendrite is bug-free. It has not yet been battle-tested in the real world and so will be error prone initially.
  • Dendrite is feature-complete. There may be client or federation APIs that are not implemented.
  • Dendrite is ready for massive homeserver deployments. There is no high-availability/clustering support.

Currently, we expect Dendrite to function well for small (10s/100s of users) homeserver deployments as well as P2P Matrix nodes in-browser or on mobile devices.

If you have further questions, please take a look at our FAQ or join us in:

Requirements

See the Planning your Installation page for more information on requirements.

To build Dendrite, you will need Go 1.20 or later.

For a usable federating Dendrite deployment, you will also need:

  • A domain name (or subdomain)
  • A valid TLS certificate issued by a trusted authority for that domain
  • SRV records or a well-known file pointing to your deployment

Also recommended are:

  • A PostgreSQL database engine, which will perform better than SQLite with many users and/or larger rooms
  • A reverse proxy server, such as nginx, configured like this sample

The Federation Tester can be used to verify your deployment.

Get started

If you wish to build a fully-federating Dendrite instance, see the Installation documentation. For running in Docker, see build/docker.

The following instructions are enough to get Dendrite started as a non-federating test deployment using self-signed certificates and SQLite databases:

$ git clone https://github.com/matrix-org/dendrite
$ cd dendrite
$ go build -o bin/ ./cmd/...

# Generate a Matrix signing key for federation (required)
$ ./bin/generate-keys --private-key matrix_key.pem

# Generate a self-signed certificate (optional, but a valid TLS certificate is normally
# needed for Matrix federation/clients to work properly!)
$ ./bin/generate-keys --tls-cert server.crt --tls-key server.key

# Copy and modify the config file - you'll need to set a server name and paths to the keys
# at the very least, along with setting up the database connection strings.
$ cp dendrite-sample.yaml dendrite.yaml

# Build and run the server:
$ ./bin/dendrite --tls-cert server.crt --tls-key server.key --config dendrite.yaml

# Create an user account (add -admin for an admin user).
# Specify the localpart only, e.g. 'alice' for '@alice:domain.com'
$ ./bin/create-account --config dendrite.yaml --username alice

Then point your favourite Matrix client at http://localhost:8008 or https://localhost:8448.

Progress

We use a script called "Are We Synapse Yet" which checks Sytest compliance rates. Sytest is a black-box homeserver test rig with around 900 tests. The script works out how many of these tests are passing on Dendrite and it updates with CI. As of January 2023, we have 100% server-server parity with Synapse, and the client-server parity is at 93% , though check CI for the latest numbers. In practice, this means you can communicate locally and via federation with Synapse servers such as matrix.org reasonably well, although there are still some missing features (like SSO and Third-party ID APIs).

We are prioritising features that will benefit single-user homeservers first (e.g Receipts, E2E) rather than features that massive deployments may be interested in (OpenID, Guests, Admin APIs, AS API). This means Dendrite supports amongst others:

  • Core room functionality (creating rooms, invites, auth rules)
  • Room versions 1 to 10 supported
  • Backfilling locally and via federation
  • Accounts, profiles and devices
  • Published room lists
  • Typing
  • Media APIs
  • Redaction
  • Tagging
  • Context
  • E2E keys and device lists
  • Receipts
  • Push
  • Guests
  • User Directory
  • Presence
  • Fulltext search

Contributing

We would be grateful for any help on issues marked as Are We Synapse Yet. These issues all have related Sytests which need to pass in order for the issue to be closed. Once you've written your code, you can quickly run Sytest to ensure that the test names are now passing.

If you're new to the project, see our Contributing page to get up to speed, then look for Good First Issues. If you're familiar with the project, look for Help Wanted issues.