dendrite/build/docker/README.md

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# Docker images
These are Docker images for Dendrite!
## 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 sample `dendrite-config.yaml`
in the `docker/config` folder in the [Dendrite repository](https://github.com/matrix-org/dendrite)
- `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:
```
go run github.com/matrix-org/dendrite/cmd/generate-keys \
--private-key=matrix_key.pem \
--tls-cert=server.crt \
--tls-key=server.key
```
## Starting Dendrite
Once in place, start the dependencies:
```
docker-compose -f docker-compose.deps.yml up
```
Wait a few seconds for Kafka and Postgres to finish starting up, and then start a monolith:
```
docker-compose -f docker-compose.monolith.yml up
```
... or start the polylith components:
```
docker-compose -f docker-compose.polylith.yml up
```
## Building the images
The `docker/images-build.sh` script will build the base image, followed by
all of the component images.
The `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`.