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---
title: Installation
parent: Docker
grand_parent: Installation
has_toc: true
nav_order: 1
permalink: /installation/docker/install
---
# Installing Dendrite using Docker Compose
Dendrite provides an [example](https://github.com/matrix-org/dendrite/blob/main/build/docker/docker-compose.yml)
Docker compose file, which needs some preparation to start successfully.
Please note that this compose file only has Postgres as a dependency, and you need to configure
a [reverse proxy](../planning#reverse-proxy).
## Preparations
### Generate a private key
First we'll generate private key, which is used to sign events, the following will create one in `./config`:
```bash
mkdir -p ./config
docker run --rm --entrypoint="/usr/bin/generate-keys" \
-v $(pwd)/config:/mnt \
matrixdotorg/dendrite-monolith:latest \
-private-key /mnt/matrix_key.pem
# Windows equivalent: docker run --rm --entrypoint="/usr/bin/generate-keys" -v %cd%/config:/mnt matrixdotorg/dendrite-monolith:latest -private-key /mnt/matrix_key.pem
```
(**NOTE**: This only needs to be executed **once**, as you otherwise overwrite the key)
### Generate a config
Similar to the command above, we can generate a config to be used, which will use the correct paths
as specified in the example docker-compose file. Change `server` to your domain and `db` according to your changes
to the docker-compose file (`services.postgres.environment` values):
```bash
mkdir -p ./config
docker run --rm --entrypoint="/bin/sh" \
-v $(pwd)/config:/mnt \
matrixdotorg/dendrite-monolith:latest \
-c "/usr/bin/generate-config \
-dir /var/dendrite/ \
-db postgres://dendrite:itsasecret@postgres/dendrite?sslmode=disable \
-server YourDomainHere > /mnt/dendrite.yaml"
# Windows equivalent: docker run --rm --entrypoint="/bin/sh" -v %cd%/config:/mnt matrixdotorg/dendrite-monolith:latest -c "/usr/bin/generate-config -dir /var/dendrite/ -db postgres://dendrite:itsasecret@postgres/dendrite?sslmode=disable -server YourDomainHere > /mnt/dendrite.yaml"
```
You can then change `config/dendrite.yaml` to your liking.
## Starting Dendrite
Once you're done changing the config, you can now start up Dendrite with
```bash
docker-compose -f docker-compose.yml up
```
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