mirror of
https://github.com/hoernschen/dendrite.git
synced 2024-12-29 08:18:27 +00:00
156 lines
8.4 KiB
Markdown
156 lines
8.4 KiB
Markdown
# Dendrite [](https://buildkite.com/matrix-dot-org/dendrite) [](https://matrix.to/#/#dendrite:matrix.org) [](https://matrix.to/#/#dendrite-dev:matrix.org)
|
|
|
|
Dendrite is a second-generation Matrix homeserver written in Go.
|
|
It intends to provide an **efficient**, **reliable** and **scalable** alternative to [Synapse](https://github.com/matrix-org/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](https://github.com/matrix-org/sytest) as Synapse as well as
|
|
a [brand new Go test suite](https://github.com/matrix-org/complement).
|
|
- Scalable: can run on multiple machines and eventually scale to massive homeserver deployments.
|
|
|
|
As of October 2020, Dendrite has now entered **beta** which means:
|
|
- Dendrite is ready for early adopters. We recommend running in Monolith mode with a PostgreSQL database.
|
|
- Dendrite has periodic semver releases. We intend to release new versions as we land significant features.
|
|
- Dendrite supports database schema upgrades between releases. This means you should never lose your messages when upgrading Dendrite.
|
|
- Breaking changes will not occur on minor releases. This means you can safely upgrade Dendrite without modifying your database or config file.
|
|
|
|
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.
|
|
- All of the CS/Federation APIs are implemented. We are tracking progress via a script called 'Are We Synapse Yet?'. In particular,
|
|
presence and push notifications are entirely missing from Dendrite. See [CHANGES.md](CHANGES.md) for updates.
|
|
- Dendrite is ready for massive homeserver deployments. You cannot shard each microservice, only run each one on a different machine.
|
|
|
|
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.
|
|
In the future, we will be able to scale up to gigantic servers (equivalent to matrix.org) via polylith mode.
|
|
|
|
If you have further questions, please take a look at [our FAQ](docs/FAQ.md) or join us in:
|
|
|
|
- **[#dendrite:matrix.org](https://matrix.to/#/#dendrite:matrix.org)** - General chat about the Dendrite project, for users and server admins alike
|
|
- **[#dendrite-dev:matrix.org](https://matrix.to/#/#dendrite-dev:matrix.org)** - The place for developers, where all Dendrite development discussion happens
|
|
- **[#dendrite-alerts:matrix.org](https://matrix.to/#/#dendrite-alerts:matrix.org)** - Release notifications and important info, highly recommended for all Dendrite server admins
|
|
|
|
## Requirements
|
|
|
|
To build Dendrite, you will need Go 1.13 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](https://github.com/matrix-org/dendrite/blob/master/docs/nginx/monolith-sample.conf)
|
|
|
|
The [Federation Tester](https://federationtester.matrix.org) can be used to verify your deployment.
|
|
|
|
## Get started
|
|
|
|
If you wish to build a fully-federating Dendrite instance, see [INSTALL.md](docs/INSTALL.md). For running in Docker, see [build/docker](build/docker).
|
|
|
|
The following instructions are enough to get Dendrite started as a non-federating test deployment using self-signed certificates and SQLite databases:
|
|
|
|
```bash
|
|
$ git clone https://github.com/matrix-org/dendrite
|
|
$ cd dendrite
|
|
$ ./build.sh
|
|
|
|
# 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-config.yaml dendrite.yaml
|
|
|
|
# Build and run the server:
|
|
$ ./bin/dendrite-monolith-server --tls-cert server.crt --tls-key server.key --config dendrite.yaml
|
|
```
|
|
|
|
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 November 2020 we're at around 58% CS API coverage and 83% Federation coverage, 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. There's a long list of features that are not implemented, notably:
|
|
- Push
|
|
- Search and Context
|
|
- User Directory
|
|
- Presence
|
|
- Guests
|
|
|
|
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 (User Directory, OpenID, Guests, Admin APIs, AS API).
|
|
This means Dendrite supports amongst others:
|
|
- Core room functionality (creating rooms, invites, auth rules)
|
|
- Federation in rooms v1-v6
|
|
- Backfilling locally and via federation
|
|
- Accounts, Profiles and Devices
|
|
- Published room lists
|
|
- Typing
|
|
- Media APIs
|
|
- Redaction
|
|
- Tagging
|
|
- E2E keys and device lists
|
|
- Receipts
|
|
|
|
|
|
## Contributing
|
|
|
|
We would be grateful for any help on issues marked as
|
|
[Are We Synapse Yet](https://github.com/matrix-org/dendrite/labels/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.
|
|
|
|
For example, if the test `Local device key changes get to remote servers` was marked as failing, find the
|
|
test file (e.g via `grep` or via the
|
|
[CI log output](https://buildkite.com/matrix-dot-org/dendrite/builds/2826#39cff5de-e032-4ad0-ad26-f819e6919c42)
|
|
it's `tests/50federation/40devicelists.pl` ) then to run Sytest:
|
|
```
|
|
docker run --rm --name sytest
|
|
-v "/Users/kegan/github/sytest:/sytest"
|
|
-v "/Users/kegan/github/dendrite:/src"
|
|
-v "/Users/kegan/logs:/logs"
|
|
-v "/Users/kegan/go/:/gopath"
|
|
-e "POSTGRES=1" -e "DENDRITE_TRACE_HTTP=1"
|
|
matrixdotorg/sytest-dendrite:latest tests/50federation/40devicelists.pl
|
|
```
|
|
See [sytest.md](docs/sytest.md) for the full description of these flags.
|
|
|
|
You can try running sytest outside of docker for faster runs, but the dependencies can be temperamental
|
|
and we recommend using docker where possible.
|
|
```
|
|
cd sytest
|
|
export PERL5LIB=$HOME/lib/perl5
|
|
export PERL_MB_OPT=--install_base=$HOME
|
|
export PERL_MM_OPT=INSTALL_BASE=$HOME
|
|
./install-deps.pl
|
|
|
|
./run-tests.pl -I Dendrite::Monolith -d $PATH_TO_DENDRITE_BINARIES
|
|
```
|
|
|
|
Sometimes Sytest is testing the wrong thing or is flakey, so it will need to be patched.
|
|
Ask on `#dendrite-dev:matrix.org` if you think this is the case for you and we'll be happy to help.
|
|
|
|
If you're new to the project, see [CONTRIBUTING.md](docs/CONTRIBUTING.md) to get up to speed then
|
|
look for [Good First Issues](https://github.com/matrix-org/dendrite/labels/good%20first%20issue). If you're
|
|
familiar with the project, look for [Help Wanted](https://github.com/matrix-org/dendrite/labels/help-wanted)
|
|
issues.
|
|
|
|
## Hardware requirements
|
|
|
|
Dendrite in Monolith + SQLite works in a range of environments including iOS and in-browser via WASM.
|
|
|
|
For small homeserver installations joined on ~10s rooms on matrix.org with ~100s of users in those rooms, including some
|
|
encrypted rooms:
|
|
- Memory: uses around 100MB of RAM, with peaks at around 200MB.
|
|
- Disk space: After a few months of usage, the database grew to around 2GB (in Monolith mode).
|
|
- CPU: Brief spikes when processing events, typically idles at 1% CPU.
|
|
|
|
This means Dendrite should comfortably work on things like Raspberry Pis.
|