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Deprecate the env var way of running the docker image (#5566)
This is mostly a documentation change, but also adds a default value for SYNAPSE_CONFIG_PATH, so that running from the generated config is the default, and will Just Work provided your config is in the right place.
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Richard van der Hoff
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changelog.d/5566.feature
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changelog.d/5566.feature
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Update Docker image to deprecate the use of environment variables for configuration, and make the use of a static configuration the default.
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@ -1,5 +1,9 @@
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# Synapse Docker
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FIXME: this is out-of-date as of
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https://github.com/matrix-org/synapse/issues/5518. Contributions to bring it up
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to date would be welcome.
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### Automated configuration
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It is recommended that you use Docker Compose to run your containers, including
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212
docker/README.md
212
docker/README.md
@ -6,39 +6,11 @@ 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](https://github.com/matrix-org/synapse/tree/master/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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-p 8448:8448 \
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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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By default, the image expects a single volume, located at ``/data``, that will hold:
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* configuration files;
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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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@ -53,142 +25,90 @@ 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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## Generating a configuration file
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Synapse requires a valid TLS certificate. You can do one of the following:
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The first step is to genearte a valid config file. To do this, you can run the
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image with the `generate` commandline option.
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* Provide your own certificate and key (as
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`${DATA_PATH}/${SYNAPSE_SERVER_NAME}.tls.crt` and
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`${DATA_PATH}/${SYNAPSE_SERVER_NAME}.tls.key`, or elsewhere by providing an
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entire config as `${SYNAPSE_CONFIG_PATH}`). In this case, you should forward
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traffic to port 8448 in the container, for example with `-p 443:8448`.
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* Use a reverse proxy to terminate incoming TLS, and forward the plain http
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traffic to port 8008 in the container. In this case you should set `-e
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SYNAPSE_NO_TLS=1`.
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* Use the ACME (Let's Encrypt) support built into Synapse. This requires
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`${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`, (accepts `true`, `false`, `on`, `off`, `1`, `0`, `yes`, `no`]): disable
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TLS in Synapse (use this if you run your own TLS-capable reverse proxy). Defaults
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to `false` (ie, TLS is enabled by default).
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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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`synapse`]
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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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You will need to specify values for the `SYNAPSE_SERVER_NAME` and
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`SYNAPSE_REPORT_STATS` environment variable, and mount a docker volume to store
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the configuration on. For 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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For information on picking a suitable server name, see
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https://github.com/matrix-org/synapse/blob/master/INSTALL.md.
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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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The above command will generate a `homeserver.yaml` in (typically)
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`/var/lib/docker/volumes/synapse-data/_data`. You should check this file, and
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customise it to your needs.
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The following environment variables are supported in this mode:
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The following environment variables are supported in `generate` mode:
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* `SYNAPSE_SERVER_NAME` (mandatory): the server public hostname.
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* `SYNAPSE_REPORT_STATS` (mandatory, `yes` or `no`): whether to enable
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anonymous statistics reporting.
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* `SYNAPSE_CONFIG_PATH` (mandatory): path to the file to be generated.
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* `SYNAPSE_CONFIG_DIR`: where additional config files (such as the log config
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and event signing key) will be stored. Defaults to `/data`.
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* `SYNAPSE_CONFIG_PATH`: path to the file to be generated. Defaults to
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`<SYNAPSE_CONFIG_DIR>/homeserver.yaml`.
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* `SYNAPSE_DATA_DIR`: where the generated config will put persistent data
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such as the datatase and media store. Defaults to `/data`.
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* `UID`, `GID`: the user id and group id to use for creating the data
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directories. Defaults to `991`, `991`.
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## Running synapse
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Once you have a valid configuration file, you can start synapse as follows:
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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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-p 8008:8008 \
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matrixdotorg/synapse:latest
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```
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You can then check that it has started correctly with:
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```
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docker logs synapse
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```
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If all is well, you should now be able to connect to http://localhost:8008 and
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see a confirmation message.
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The following environment variables are supported in run mode:
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* `SYNAPSE_CONFIG_DIR`: where additional config files are stored. Defaults to
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`/data`.
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* `SYNAPSE_CONFIG_PATH`: path to the config file. Defaults to
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`<SYNAPSE_CONFIG_DIR>/homeserver.yaml`.
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* `UID`, `GID`: the user and group id to run Synapse as. Defaults to `991`, `991`.
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## TLS support
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The default configuration exposes a single HTTP port: http://localhost:8008. It
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is suitable for local testing, but for any practical use, you will either need
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to use a reverse proxy, or configure Synapse to expose an HTTPS port.
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For documentation on using a reverse proxy, see
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https://github.com/matrix-org/synapse/blob/master/docs/reverse_proxy.rst.
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For more information on enabling TLS support in synapse itself, see
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https://github.com/matrix-org/synapse/blob/master/INSTALL.md#tls-certificates. Of
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course, you will need to expose the TLS port from the container with a `-p`
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argument to `docker run`.
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## Legacy dynamic configuration file support
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For backwards-compatibility only, the docker image supports creating a dynamic
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configuration file based on environment variables. This is now deprecated, but
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is enabled when the `SYNAPSE_SERVER_NAME` variable is set (and `generate` is
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not given).
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@ -131,12 +131,13 @@ def run_generate_config(environ, ownership):
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Never returns.
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"""
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for v in ("SYNAPSE_SERVER_NAME", "SYNAPSE_REPORT_STATS", "SYNAPSE_CONFIG_PATH"):
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for v in ("SYNAPSE_SERVER_NAME", "SYNAPSE_REPORT_STATS"):
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if v not in environ:
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error("Environment variable '%s' is mandatory in `generate` mode." % (v,))
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server_name = environ["SYNAPSE_SERVER_NAME"]
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config_dir = environ.get("SYNAPSE_CONFIG_DIR", "/data")
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config_path = environ.get("SYNAPSE_CONFIG_PATH", config_dir + "/homeserver.yaml")
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data_dir = environ.get("SYNAPSE_DATA_DIR", "/data")
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# create a suitable log config from our template
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@ -157,7 +158,7 @@ def run_generate_config(environ, ownership):
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"--report-stats",
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environ["SYNAPSE_REPORT_STATS"],
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"--config-path",
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environ["SYNAPSE_CONFIG_PATH"],
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config_path,
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"--config-directory",
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config_dir,
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"--data-directory",
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@ -176,11 +177,30 @@ def main(args, environ):
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if mode == "generate":
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return run_generate_config(environ, ownership)
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# In normal mode, generate missing keys if any, then run synapse
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if "SYNAPSE_CONFIG_PATH" in environ:
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config_path = environ["SYNAPSE_CONFIG_PATH"]
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else:
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if "SYNAPSE_SERVER_NAME" in environ:
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# backwards-compatibility generate-a-config-on-the-fly mode
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if "SYNAPSE_CONFIG_PATH" in environ:
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error(
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"SYNAPSE_SERVER_NAME and SYNAPSE_CONFIG_PATH are mutually exclusive "
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"except in `generate` mode."
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)
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config_path = generate_config_from_template(environ, ownership)
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else:
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config_dir = environ.get("SYNAPSE_CONFIG_DIR", "/data")
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config_path = environ.get(
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"SYNAPSE_CONFIG_PATH", config_dir + "/homeserver.yaml"
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)
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if not os.path.exists(config_path):
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error(
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"Config file '%s' does not exist. You should either create a new "
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"config file by running with the `generate` argument (and then edit "
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"the resulting file before restarting) or specify the path to an "
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"existing config file with the SYNAPSE_CONFIG_PATH variable."
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% (config_path,)
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)
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log("Starting synapse with config file " + config_path)
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args = [
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"su-exec",
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