dendrite/build/docker/README.md

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# Docker images
These are Docker images for Dendrite!
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They can be found on Docker Hub:
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- [matrixdotorg/dendrite-monolith](https://hub.docker.com/r/matrixdotorg/dendrite-monolith) for monolith deployments
- [matrixdotorg/dendrite-polylith](https://hub.docker.com/r/matrixdotorg/dendrite-polylith) for polylith deployments
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## Dockerfiles
The `Dockerfile` builds the base image which contains all of the Dendrite
components. The `Dockerfile.component` file takes the given component, as
specified with `--buildarg component=` from the base image and produce
smaller component-specific images, which are substantially smaller and do
not contain the Go toolchain etc.
## Compose files
There are three sample `docker-compose` files:
- `docker-compose.deps.yml` which runs the Postgres and Kafka prerequisites
- `docker-compose.monolith.yml` which runs a monolith Dendrite deployment
- `docker-compose.polylith.yml` which runs a polylith Dendrite deployment
## Configuration
The `docker-compose` files refer to the `/etc/dendrite` volume as where the
runtime config should come from. The mounted folder must contain:
- `dendrite.yaml` configuration file (based on the [`dendrite-config.yaml`](https://raw.githubusercontent.com/matrix-org/dendrite/master/dendrite-config.yaml)
sample in the `build/docker/config` folder of this repository.)
- `matrix_key.pem` server key, as generated using `cmd/generate-keys`
- `server.crt` certificate file
- `server.key` private key file for the above certificate
To generate keys:
```
docker run --rm --entrypoint="" \
-v $(pwd):/mnt \
matrixdotorg/dendrite-monolith:latest \
/usr/bin/generate-keys \
-private-key /mnt/matrix_key.pem \
-tls-cert /mnt/server.crt \
-tls-key /mnt/server.key
```
The key files will now exist in your current working directory, and can be mounted into place.
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## Starting Dendrite as a monolith deployment
Create your config based on the [`dendrite-config.yaml`](https://raw.githubusercontent.com/matrix-org/dendrite/master/dendrite-config.yaml) configuration file in the `build/docker/config` folder of this repository. And rename the config file to `dendrite.yml` (and put it in your `config` directory).
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Once in place, start the PostgreSQL dependency:
```
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docker-compose -f docker-compose.deps.yml up postgres
```
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Wait a few seconds for PostgreSQL to finish starting up, and then start a monolith:
```
docker-compose -f docker-compose.monolith.yml up
```
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## Starting Dendrite as a polylith deployment
Create your config based on the [`dendrite-config.yaml`](https://raw.githubusercontent.com/matrix-org/dendrite/master/dendrite-config.yaml) configuration file in the `build/docker/config` folder of this repository. And rename the config file to `dendrite.yml` (and put it in your `config` directory).
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Once in place, start all the dependencies:
```
docker-compose -f docker-compose.deps.yml up
```
Wait a few seconds for PostgreSQL and Kafka to finish starting up, and then start a polylith:
```
docker-compose -f docker-compose.polylith.yml up
```
## Building the images
The `build/docker/images-build.sh` script will build the base image, followed by
all of the component images.
The `build/docker/images-push.sh` script will push them to Docker Hub (subject
to permissions).
If you wish to build and push your own images, rename `matrixdotorg/dendrite` to
the name of another Docker Hub repository in `images-build.sh` and `images-push.sh`.