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Add installation instructions to repo (#192)

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INSTALL.md Normal file
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# Installing Dendrite
Dendrite can be run in one of two configurations:
* A cluster of individual components, dealing with different aspects of the
Matrix protocol (see [WIRING.md](./WIRING.md)). Components communicate with
one another via [Apache Kafka](https://kafka.apache.org).
* A monolith server, in which all components run in the same process. In this
configuration, Kafka can be replaced with an in-process implementation
called [naffka](https://github.com/matrix-org/naffka).
## Requirements
- Go 1.8+
- Postgres 9.5+
- For Kafka (optional if using the monolith server):
- Unix-based system (https://kafka.apache.org/documentation/#os)
- JDK 1.8+ / OpenJDK 1.8+
- Apache Kafka 0.10.2+ (see https://github.com/matrix-org/dendrite/blob/master/travis-install-kafka.sh for up-to-date version numbers)
## Setting up a development environment
Assumes Go 1.8 and JDK 1.8 are already installed and are on PATH.
```bash
# Get the code
git clone https://github.com/matrix-org/dendrite
cd dendrite
# Build it
go get github.com/constabulary/gb/...
gb build
```
If using Kafka, install and start it:
```bash
MIRROR=http://apache.mirror.anlx.net/kafka/0.10.2.0/kafka_2.11-0.10.2.0.tgz
# Only download the kafka if it isn't already downloaded.
test -f kafka.tgz || wget $MIRROR -O kafka.tgz
# Unpack the kafka over the top of any existing installation
mkdir -p kafka && tar xzf kafka.tgz -C kafka --strip-components 1
# Start the zookeeper running in the background.
# By default the zookeeper listens on localhost:2181
kafka/bin/zookeeper-server-start.sh -daemon kafka/config/zookeeper.properties
# Start the kafka server running in the background.
# By default the kafka listens on localhost:9092
kafka/bin/kafka-server-start.sh -daemon kafka/config/server.properties
```
## Configuration
### Postgres database setup
Dendrite requires a postgres database engine, version 9.5 or later.
* Create role:
```bash
sudo -u postgres createuser -P dendrite # prompts for password
```
* Create databases:
```bash
for i in account device mediaapi syncapi roomserver serverkey federationsender; do
sudo -u postgres createdb -O dendrite dendrite_$i
done
```
### Crypto key generation
Generate the keys (unlike synapse, dendrite doesn't autogen yet):
```bash
# Generate a self-signed SSL cert for federation:
test -f server.key || openssl req -x509 -newkey rsa:4096 -keyout server.key -out server.crt -days 3650 -nodes -subj /CN=localhost
# generate ed25519 signing key
test -f matrix_key.pem || python3 > matrix_key.pem <<EOF
import base64;
r = lambda n: base64.b64encode(open("/dev/urandom", "rb").read(n)).decode("utf8");
print("-----BEGIN MATRIX PRIVATE KEY-----")
print("Key-ID:", "ed25519:" + r(3).rstrip("="))
print(r(32))
print("-----END MATRIX PRIVATE KEY-----")
EOF
```
### Configuration
Create config file, based on `dendrite-config.yaml`. Call it `dendrite.yaml`. Things that will need editing include *at least*:
* `server_name`
* `database/*`
## Starting a monolith server
TODO
## Starting a multiprocess server
The following contains scripts which will run all the required processes in order to point a Matrix client at Dendrite. Conceptually, you are wiring together to form the following diagram:
```
DB:syncserver
| roomserver_output_topic_dev
/sync +--------------------------+ <=====================
+--------->| dendrite-sync-api-server | ||
| +--------------------------+ +----------------------+
Matrix +------------------+ | :7773 query API | dendrite-room-server |--DB:roomserver
Clients --->| client-api-proxy |---+ +----------------->+----------------------+
+------------------+ | | :7770 ^^
:8008 | CS API +----------------------------+ ||
+--------->| dendrite-client-api-server |===================||
| +----------------------------+ roomserver_input_topic_dev
| :7771
|
| /media +---------------------------+
+--------->| dendrite-media-api-server |
+---------------------------+
:7774
A --> B = HTTP requests (A = client, B = server)
A ==> B = Kafka (A = producer, B = consumer)
```
### Run a client api proxy
This is what Matrix clients will talk to. If you use the script below, point your client at `http://localhost:8008`.
```bash
#!/bin/bash
./bin/client-api-proxy \
--bind-address ":8008" \
--sync-api-server-url "http://localhost:7773" \
--client-api-server-url "http://localhost:7771" \
--media-api-server-url "http://localhost:7774"
```
### Run a client api
This is what implements message sending. Clients talk to this via the proxy in order to send messages.
```bash
./bin/dendrite-client-api-server --config=dendrite.yaml
```
(If this fails with `pq: syntax error at or near "ON"`, check you are using at least postgres 9.5.)
### Run a room server
This is what implements the room DAG. Clients do not talk to this.
```bash
./bin/dendrite-room-server --config=dendrite.yaml
```
### Run a sync server
This is what implements `/sync` requests. Clients talk to this via the proxy in order to receive messages.
```bash
./bin/dendrite-sync-api-server --config dendrite.yaml
```
### Run a media server
This implements `/media` requests. Clients talk to this via the proxy in order to upload and retrieve media.
```bash
./bin/dendrite-media-api-server --config dendrite.yaml
```

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Dendrite will be a matrix homeserver written in go.
# Install
Dendrite is still very much a work in progress, but those wishing to work on it
may be interested in the installation instructions in [INSTALL.md](INSTALL.md).
# Design
## Log Based Architecture

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# The path to the PEM formatted matrix private key.
private_key: "/etc/dendrite/matrix_key.pem"
# The x509 certificates used by the federation listeners for this server
federation_certificates: ["/etc/dendrite/federation_tls.pem"]
federation_certificates: ["/etc/dendrite/server.pem"]
# The media repository config
media: