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179 lines
7.0 KiB
Markdown
179 lines
7.0 KiB
Markdown
# Synapse Docker
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This Docker image will run Synapse as a single process. By default it uses a
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sqlite database; for production use you should connect it to a separate
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postgres database.
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The image also does *not* provide a TURN server.
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## Run
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### Using docker-compose (easier)
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This image is designed to run either with an automatically generated
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configuration file or with a custom configuration that requires manual editing.
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An easy way to make use of this image is via docker-compose. See the
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[contrib/docker](../contrib/docker) section of the synapse project for
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examples.
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### Without Compose (harder)
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If you do not wish to use Compose, you may still run this image using plain
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Docker commands. Note that the following is just a guideline and you may need
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to add parameters to the docker run command to account for the network situation
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with your postgres database.
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```
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docker run \
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-d \
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--name synapse \
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--mount type=volume,src=synapse-data,dst=/data \
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-e SYNAPSE_SERVER_NAME=my.matrix.host \
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-e SYNAPSE_REPORT_STATS=yes \
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matrixdotorg/synapse:latest
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```
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## Volumes
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The image expects a single volume, located at ``/data``, that will hold:
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* temporary files during uploads;
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* uploaded media and thumbnails;
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* the SQLite database if you do not configure postgres;
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* the appservices configuration.
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You are free to use separate volumes depending on storage endpoints at your
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disposal. For instance, ``/data/media`` coud be stored on a large but low
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performance hdd storage while other files could be stored on high performance
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endpoints.
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In order to setup an application service, simply create an ``appservices``
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directory in the data volume and write the application service Yaml
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configuration file there. Multiple application services are supported.
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## TLS certificates
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Synapse requires a valid TLS certificate. You can do one of the following:
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* Provide your own certificate and key (as
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`${DATA_PATH}/${SYNAPSE_SERVER_NAME}.crt` and
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`${DATA_PATH}/${SYNAPSE_SERVER_NAME}.key`, or elsewhere by providing an
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entire config as `${SYNAPSE_CONFIG_PATH}`).
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* Use a reverse proxy to terminate incoming TLS, and forward the plain http
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traffic to port 8008 in the container. In this case you should set `-e
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SYNAPSE_NO_TLS=1`.
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* Use the ACME (Let's Encrypt) support built into Synapse. This requires
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`${SYNAPSE_SERVER_NAME}` port 80 to be forwarded to port 8009 in the
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container, for example with `-p 80:8009`. To enable it in the docker
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container, set `-e SYNAPSE_ACME=1`.
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If you don't do any of these, Synapse will fail to start with an error similar to:
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synapse.config._base.ConfigError: Error accessing file '/data/<server_name>.tls.crt' (config for tls_certificate): No such file or directory
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## Environment
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Unless you specify a custom path for the configuration file, a very generic
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file will be generated, based on the following environment settings.
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These are a good starting point for setting up your own deployment.
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Global settings:
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* ``UID``, the user id Synapse will run as [default 991]
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* ``GID``, the group id Synapse will run as [default 991]
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* ``SYNAPSE_CONFIG_PATH``, path to a custom config file
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If ``SYNAPSE_CONFIG_PATH`` is set, you should generate a configuration file
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then customize it manually: see [Generating a config
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file](#generating-a-config-file).
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Otherwise, a dynamic configuration file will be used.
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### Environment variables used to build a dynamic configuration file
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The following environment variables are used to build the configuration file
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when ``SYNAPSE_CONFIG_PATH`` is not set.
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* ``SYNAPSE_SERVER_NAME`` (mandatory), the server public hostname.
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* ``SYNAPSE_REPORT_STATS``, (mandatory, ``yes`` or ``no``), enable anonymous
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statistics reporting back to the Matrix project which helps us to get funding.
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* ``SYNAPSE_NO_TLS``, set this variable to disable TLS in Synapse (use this if
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you run your own TLS-capable reverse proxy).
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* ``SYNAPSE_ENABLE_REGISTRATION``, set this variable to enable registration on
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the Synapse instance.
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* ``SYNAPSE_ALLOW_GUEST``, set this variable to allow guest joining this server.
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* ``SYNAPSE_EVENT_CACHE_SIZE``, the event cache size [default `10K`].
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* ``SYNAPSE_RECAPTCHA_PUBLIC_KEY``, set this variable to the recaptcha public
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key in order to enable recaptcha upon registration.
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* ``SYNAPSE_RECAPTCHA_PRIVATE_KEY``, set this variable to the recaptcha private
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key in order to enable recaptcha upon registration.
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* ``SYNAPSE_TURN_URIS``, set this variable to the coma-separated list of TURN
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uris to enable TURN for this homeserver.
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* ``SYNAPSE_TURN_SECRET``, set this to the TURN shared secret if required.
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* ``SYNAPSE_MAX_UPLOAD_SIZE``, set this variable to change the max upload size
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[default `10M`].
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* ``SYNAPSE_ACME``: set this to enable the ACME certificate renewal support.
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Shared secrets, that will be initialized to random values if not set:
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* ``SYNAPSE_REGISTRATION_SHARED_SECRET``, secret for registrering users if
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registration is disable.
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* ``SYNAPSE_MACAROON_SECRET_KEY`` secret for signing access tokens
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to the server.
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Database specific values (will use SQLite if not set):
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* `POSTGRES_DB` - The database name for the synapse postgres
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database. [default: `synapse`]
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* `POSTGRES_HOST` - The host of the postgres database if you wish to use
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postgresql instead of sqlite3. [default: `db` which is useful when using a
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container on the same docker network in a compose file where the postgres
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service is called `db`]
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* `POSTGRES_PASSWORD` - The password for the synapse postgres database. **If
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this is set then postgres will be used instead of sqlite3.** [default: none]
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**NOTE**: You are highly encouraged to use postgresql! Please use the compose
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file to make it easier to deploy.
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* `POSTGRES_USER` - The user for the synapse postgres database. [default:
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`matrix`]
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Mail server specific values (will not send emails if not set):
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* ``SYNAPSE_SMTP_HOST``, hostname to the mail server.
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* ``SYNAPSE_SMTP_PORT``, TCP port for accessing the mail server [default
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``25``].
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* ``SYNAPSE_SMTP_USER``, username for authenticating against the mail server if
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any.
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* ``SYNAPSE_SMTP_PASSWORD``, password for authenticating against the mail
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server if any.
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### Generating a config file
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It is possible to generate a basic configuration file for use with
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`SYNAPSE_CONFIG_PATH` using the `generate` commandline option. You will need to
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specify values for `SYNAPSE_CONFIG_PATH`, `SYNAPSE_SERVER_NAME` and
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`SYNAPSE_REPORT_STATS`, and mount a docker volume to store the data on. For
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example:
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```
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docker run -it --rm
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--mount type=volume,src=synapse-data,dst=/data \
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-e SYNAPSE_CONFIG_PATH=/data/homeserver.yaml \
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-e SYNAPSE_SERVER_NAME=my.matrix.host \
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-e SYNAPSE_REPORT_STATS=yes \
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matrixdotorg/synapse:latest generate
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```
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This will generate a `homeserver.yaml` in (typically)
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`/var/lib/docker/volumes/synapse-data/_data`, which you can then customise and
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use with:
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```
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docker run -d --name synapse \
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--mount type=volume,src=synapse-data,dst=/data \
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-e SYNAPSE_CONFIG_PATH=/data/homeserver.yaml \
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matrixdotorg/synapse:latest
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```
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