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Update documentation
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Neil Alexander
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2 changed files with 38 additions and 70 deletions
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@ -70,15 +70,20 @@ global:
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# Configuration for NATS JetStream
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jetstream:
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# A list of NATS addresses to connect to. If none are specified, an
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# internal NATS server will be used when running in monolith mode only.
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# A list of NATS Server addresses to connect to. If none are specified, an
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# internal NATS server will be started automatically when running Dendrite
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# in monolith mode. It is required to specify the address of at least one
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# NATS Server node if running in polylith mode.
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addresses:
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# - localhost:4222
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# Keep all storage in memory. This is mostly useful for unit tests.
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# Keep all NATS streams in memory, rather than persisting it to the storage
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# path below. This option is present primarily for integration testing and
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# should not be used on a real world Dendrite deployment.
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in_memory: false
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# Persistent directory to store JetStream streams in.
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# Persistent directory to store JetStream streams in. This directory
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# should be preserved across Dendrite restarts.
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storage_path: ./
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# The prefix to use for stream names for this homeserver - really only
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@ -2,21 +2,23 @@
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Dendrite can be run in one of two configurations:
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* **Polylith mode**: A cluster of individual components, dealing with different
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aspects of the Matrix protocol (see [WIRING.md](WIRING-Current.md)). Components communicate
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with each other using internal HTTP APIs and [Apache Kafka](https://kafka.apache.org).
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This will almost certainly be the preferred model for large-scale deployments.
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* **Monolith mode**: All components run in the same process. In this mode,
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Kafka is completely optional and can instead be replaced with an in-process
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lightweight implementation called [Naffka](https://github.com/matrix-org/naffka). This
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will usually be the preferred model for low-volume, low-user or experimental deployments.
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it is possible to run an in-process [NATS Server](https://github.com/nats-io/nats-server)
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instead of running a standalone deployment. This will usually be the preferred model for
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low-to-mid volume deployments, providing the best balance between performance and resource usage.
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For most deployments, it is **recommended to run in monolith mode with PostgreSQL databases**.
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* **Polylith mode**: A cluster of individual components running in their own processes, dealing
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with different aspects of the Matrix protocol (see [WIRING.md](WIRING-Current.md)). Components
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communicate with each other using internal HTTP APIs and [NATS Server](https://github.com/nats-io/nats-server).
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This will almost certainly be the preferred model for very large deployments but scalability
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comes with a cost. API calls are expensive and therefore a polylith deployment may end up using
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disproportionately more resources for a smaller number of users compared to a monolith deployment.
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In almost all cases, it is **recommended to run in monolith mode with PostgreSQL databases**.
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Regardless of whether you are running in polylith or monolith mode, each Dendrite component that
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requires storage has its own database. Both Postgres and SQLite are supported and can be
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mixed-and-matched across components as needed in the configuration file.
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requires storage has its own database connections. Both Postgres and SQLite are supported and can
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be mixed-and-matched across components as needed in the configuration file.
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Be advised that Dendrite is still in development and it's not recommended for
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use in production environments just yet!
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@ -26,13 +28,11 @@ use in production environments just yet!
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Dendrite requires:
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* Go 1.15 or higher
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* Postgres 9.6 or higher (if using Postgres databases, not needed for SQLite)
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* PostgreSQL 12 or higher (if using PostgreSQL databases, not needed for SQLite)
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If you want to run a polylith deployment, you also need:
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* Apache Kafka 0.10.2+
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Please note that Kafka is **not required** for a monolith deployment.
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* A standalone [NATS Server](https://github.com/nats-io/nats-server) deployment with JetStream enabled
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## Building Dendrite
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@ -49,40 +49,18 @@ Then build it:
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./build.sh
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```
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## Install Kafka (polylith only)
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## Install NATS Server
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Install and start Kafka (c.f. [scripts/install-local-kafka.sh](scripts/install-local-kafka.sh)):
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Follow the [NATS Server installation instructions](https://docs.nats.io/running-a-nats-service/introduction/installation) and then [start your NATS deployment](https://docs.nats.io/running-a-nats-service/introduction/running).
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```bash
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KAFKA_URL=http://archive.apache.org/dist/kafka/2.1.0/kafka_2.11-2.1.0.tgz
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# Only download the kafka if it isn't already downloaded.
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test -f kafka.tgz || wget $KAFKA_URL -O kafka.tgz
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# Unpack the kafka over the top of any existing installation
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mkdir -p kafka && tar xzf kafka.tgz -C kafka --strip-components 1
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# Start the zookeeper running in the background.
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# By default the zookeeper listens on localhost:2181
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kafka/bin/zookeeper-server-start.sh -daemon kafka/config/zookeeper.properties
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# Start the kafka server running in the background.
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# By default the kafka listens on localhost:9092
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kafka/bin/kafka-server-start.sh -daemon kafka/config/server.properties
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```
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On macOS, you can use [Homebrew](https://brew.sh/) for easier setup of Kafka:
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```bash
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brew install kafka
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brew services start zookeeper
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brew services start kafka
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```
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JetStream must be enabled, either by passing the `-js` flag to `nats-server`,
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or by specifying the `store_dir` option in the the `jetstream` configuration.
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## Configuration
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### PostgreSQL database setup
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Assuming that PostgreSQL 9.6 (or later) is installed:
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Assuming that PostgreSQL 12 (or later) is installed:
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* Create role, choosing a new password when prompted:
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@ -109,7 +87,7 @@ On macOS, omit `sudo -u postgres` from the below commands.
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* If you want to run each Dendrite component with its own database:
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```bash
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for i in mediaapi syncapi roomserver signingkeyserver federationsender appservice keyserver userapi_accounts userapi_devices naffka; do
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for i in mediaapi syncapi roomserver federationapi appservice keyserver userapi_accounts userapi_devices; do
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sudo -u postgres createdb -O dendrite dendrite_$i
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done
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```
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@ -163,7 +141,11 @@ Create config file, based on `dendrite-config.yaml`. Call it `dendrite.yaml`. Th
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* `postgres://dendrite:password@localhost/dendrite_userapi_account?sslmode=disable` to connect to PostgreSQL without SSL/TLS
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* For SQLite on disk: `file:component.db` or `file:///path/to/component.db`, e.g. `file:userapi_account.db`
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* Postgres and SQLite can be mixed and matched on different components as desired.
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* The `use_naffka` option if using Naffka in a monolith deployment
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* Either one of the following in the `jetstream` configuration section:
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* The `addresses` option — a list of one or more addresses of an external standalone
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NATS Server deployment
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* The `storage_path` — where on the filesystem the built-in NATS server should
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store durable queues, if using the built-in NATS server
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There are other options which may be useful so review them all. In particular,
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if you are trying to federate from your Dendrite instance into public rooms
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@ -177,11 +159,6 @@ using SQLite, all components **MUST** use their own database file.
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## Starting a monolith server
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It is possible to use Naffka as an in-process replacement to Kafka when using
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the monolith server. To do this, set `use_naffka: true` in your `dendrite.yaml`
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configuration and uncomment the relevant Naffka line in the `database` section.
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Be sure to update the database username and password if needed.
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The monolith server can be started as shown below. By default it listens for
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HTTP connections on port 8008, so you can configure your Matrix client to use
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`http://servername:8008` as the server:
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@ -197,6 +174,9 @@ for HTTPS connections on port 8448:
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./bin/dendrite-monolith-server --tls-cert=server.crt --tls-key=server.key
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```
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If the `jetstream` section of the configuration contains no `addresses` but does
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contain a `store_dir`,
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## Starting a polylith deployment
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The following contains scripts which will run all the required processes in order to point a Matrix client at Dendrite.
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@ -263,15 +243,6 @@ This is what implements the room DAG. Clients do not talk to this.
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./bin/dendrite-polylith-multi --config=dendrite.yaml roomserver
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```
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#### Federation sender
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This sends events from our users to other servers. This is only required if
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you want to support federation.
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```bash
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./bin/dendrite-polylith-multi --config=dendrite.yaml federationsender
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```
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#### Appservice server
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This sends events from the network to [application
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@ -291,14 +262,6 @@ This manages end-to-end encryption keys for users.
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./bin/dendrite-polylith-multi --config=dendrite.yaml keyserver
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```
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#### Signing key server
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This manages signing keys for servers.
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```bash
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./bin/dendrite-polylith-multi --config=dendrite.yaml signingkeyserver
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```
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#### EDU server
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This manages processing EDUs such as typing, send-to-device events and presence. Clients do not talk to
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