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| -rw-r--r-- | docker/README.md | 231 | ||||
| -rw-r--r-- | docker/conf/homeserver.yaml | 2 | ||||
| -rwxr-xr-x | docker/start.py | 270 |
3 files changed, 293 insertions, 210 deletions
diff --git a/docker/README.md b/docker/README.md index 5a596eecb9..b62417c281 100644 --- a/docker/README.md +++ b/docker/README.md @@ -6,39 +6,11 @@ postgres database. The image also does *not* provide a TURN server. -## Run - -### Using docker-compose (easier) - -This image is designed to run either with an automatically generated -configuration file or with a custom configuration that requires manual editing. - -An easy way to make use of this image is via docker-compose. See the -[contrib/docker](https://github.com/matrix-org/synapse/tree/master/contrib/docker) section of the synapse project for -examples. - -### Without Compose (harder) - -If you do not wish to use Compose, you may still run this image using plain -Docker commands. Note that the following is just a guideline and you may need -to add parameters to the docker run command to account for the network situation -with your postgres database. - -``` -docker run \ - -d \ - --name synapse \ - --mount type=volume,src=synapse-data,dst=/data \ - -e SYNAPSE_SERVER_NAME=my.matrix.host \ - -e SYNAPSE_REPORT_STATS=yes \ - -p 8448:8448 \ - matrixdotorg/synapse:latest -``` - ## Volumes -The image expects a single volume, located at ``/data``, that will hold: +By default, the image expects a single volume, located at ``/data``, that will hold: +* configuration files; * temporary files during uploads; * uploaded media and thumbnails; * the SQLite database if you do not configure postgres; @@ -53,129 +25,106 @@ In order to setup an application service, simply create an ``appservices`` directory in the data volume and write the application service Yaml configuration file there. Multiple application services are supported. -## TLS certificates - -Synapse requires a valid TLS certificate. You can do one of the following: - - * Provide your own certificate and key (as - `${DATA_PATH}/${SYNAPSE_SERVER_NAME}.tls.crt` and - `${DATA_PATH}/${SYNAPSE_SERVER_NAME}.tls.key`, or elsewhere by providing an - entire config as `${SYNAPSE_CONFIG_PATH}`). In this case, you should forward - traffic to port 8448 in the container, for example with `-p 443:8448`. - - * Use a reverse proxy to terminate incoming TLS, and forward the plain http - traffic to port 8008 in the container. In this case you should set `-e - SYNAPSE_NO_TLS=1`. - - * Use the ACME (Let's Encrypt) support built into Synapse. This requires - `${SYNAPSE_SERVER_NAME}` port 80 to be forwarded to port 8009 in the - container, for example with `-p 80:8009`. To enable it in the docker - container, set `-e SYNAPSE_ACME=1`. - -If you don't do any of these, Synapse will fail to start with an error similar to: - - synapse.config._base.ConfigError: Error accessing file '/data/<server_name>.tls.crt' (config for tls_certificate): No such file or directory - -## Environment - -Unless you specify a custom path for the configuration file, a very generic -file will be generated, based on the following environment settings. -These are a good starting point for setting up your own deployment. - -Global settings: - -* ``UID``, the user id Synapse will run as [default 991] -* ``GID``, the group id Synapse will run as [default 991] -* ``SYNAPSE_CONFIG_PATH``, path to a custom config file - -If ``SYNAPSE_CONFIG_PATH`` is set, you should generate a configuration file -then customize it manually: see [Generating a config -file](#generating-a-config-file). - -Otherwise, a dynamic configuration file will be used. - -### Environment variables used to build a dynamic configuration file - -The following environment variables are used to build the configuration file -when ``SYNAPSE_CONFIG_PATH`` is not set. - -* ``SYNAPSE_SERVER_NAME`` (mandatory), the server public hostname. -* ``SYNAPSE_REPORT_STATS``, (mandatory, ``yes`` or ``no``), enable anonymous - statistics reporting back to the Matrix project which helps us to get funding. -* `SYNAPSE_NO_TLS`, (accepts `true`, `false`, `on`, `off`, `1`, `0`, `yes`, `no`]): disable - TLS in Synapse (use this if you run your own TLS-capable reverse proxy). Defaults - to `false` (ie, TLS is enabled by default). -* ``SYNAPSE_ENABLE_REGISTRATION``, set this variable to enable registration on - the Synapse instance. -* ``SYNAPSE_ALLOW_GUEST``, set this variable to allow guest joining this server. -* ``SYNAPSE_EVENT_CACHE_SIZE``, the event cache size [default `10K`]. -* ``SYNAPSE_RECAPTCHA_PUBLIC_KEY``, set this variable to the recaptcha public - key in order to enable recaptcha upon registration. -* ``SYNAPSE_RECAPTCHA_PRIVATE_KEY``, set this variable to the recaptcha private - key in order to enable recaptcha upon registration. -* ``SYNAPSE_TURN_URIS``, set this variable to the coma-separated list of TURN - uris to enable TURN for this homeserver. -* ``SYNAPSE_TURN_SECRET``, set this to the TURN shared secret if required. -* ``SYNAPSE_MAX_UPLOAD_SIZE``, set this variable to change the max upload size - [default `10M`]. -* ``SYNAPSE_ACME``: set this to enable the ACME certificate renewal support. - -Shared secrets, that will be initialized to random values if not set: - -* ``SYNAPSE_REGISTRATION_SHARED_SECRET``, secret for registrering users if - registration is disable. -* ``SYNAPSE_MACAROON_SECRET_KEY`` secret for signing access tokens - to the server. - -Database specific values (will use SQLite if not set): - -* `POSTGRES_DB` - The database name for the synapse postgres - database. [default: `synapse`] -* `POSTGRES_HOST` - The host of the postgres database if you wish to use - postgresql instead of sqlite3. [default: `db` which is useful when using a - container on the same docker network in a compose file where the postgres - service is called `db`] -* `POSTGRES_PASSWORD` - The password for the synapse postgres database. **If - this is set then postgres will be used instead of sqlite3.** [default: none] - **NOTE**: You are highly encouraged to use postgresql! Please use the compose - file to make it easier to deploy. -* `POSTGRES_USER` - The user for the synapse postgres database. [default: - `synapse`] - -Mail server specific values (will not send emails if not set): - -* ``SYNAPSE_SMTP_HOST``, hostname to the mail server. -* ``SYNAPSE_SMTP_PORT``, TCP port for accessing the mail server [default - ``25``]. -* ``SYNAPSE_SMTP_USER``, username for authenticating against the mail server if - any. -* ``SYNAPSE_SMTP_PASSWORD``, password for authenticating against the mail - server if any. - -### Generating a config file - -It is possible to generate a basic configuration file for use with -`SYNAPSE_CONFIG_PATH` using the `generate` commandline option. You will need to -specify values for `SYNAPSE_CONFIG_PATH`, `SYNAPSE_SERVER_NAME` and -`SYNAPSE_REPORT_STATS`, and mount a docker volume to store the data on. For -example: +## Generating a configuration file + +The first step is to genearte a valid config file. To do this, you can run the +image with the `generate` commandline option. + +You will need to specify values for the `SYNAPSE_SERVER_NAME` and +`SYNAPSE_REPORT_STATS` environment variable, and mount a docker volume to store +the configuration on. For example: ``` docker run -it --rm \ --mount type=volume,src=synapse-data,dst=/data \ - -e SYNAPSE_CONFIG_PATH=/data/homeserver.yaml \ -e SYNAPSE_SERVER_NAME=my.matrix.host \ -e SYNAPSE_REPORT_STATS=yes \ matrixdotorg/synapse:latest generate ``` -This will generate a `homeserver.yaml` in (typically) -`/var/lib/docker/volumes/synapse-data/_data`, which you can then customise and -use with: +For information on picking a suitable server name, see +https://github.com/matrix-org/synapse/blob/master/INSTALL.md. + +The above command will generate a `homeserver.yaml` in (typically) +`/var/lib/docker/volumes/synapse-data/_data`. You should check this file, and +customise it to your needs. + +The following environment variables are supported in `generate` mode: + +* `SYNAPSE_SERVER_NAME` (mandatory): the server public hostname. +* `SYNAPSE_REPORT_STATS` (mandatory, `yes` or `no`): whether to enable + anonymous statistics reporting. +* `SYNAPSE_CONFIG_DIR`: where additional config files (such as the log config + and event signing key) will be stored. Defaults to `/data`. +* `SYNAPSE_CONFIG_PATH`: path to the file to be generated. Defaults to + `<SYNAPSE_CONFIG_DIR>/homeserver.yaml`. +* `SYNAPSE_DATA_DIR`: where the generated config will put persistent data + such as the datatase and media store. Defaults to `/data`. +* `UID`, `GID`: the user id and group id to use for creating the data + directories. Defaults to `991`, `991`. + + +## Running synapse + +Once you have a valid configuration file, you can start synapse as follows: ``` docker run -d --name synapse \ --mount type=volume,src=synapse-data,dst=/data \ - -e SYNAPSE_CONFIG_PATH=/data/homeserver.yaml \ + -p 8008:8008 \ matrixdotorg/synapse:latest ``` + +You can then check that it has started correctly with: + +``` +docker logs synapse +``` + +If all is well, you should now be able to connect to http://localhost:8008 and +see a confirmation message. + +The following environment variables are supported in run mode: + +* `SYNAPSE_CONFIG_DIR`: where additional config files are stored. Defaults to + `/data`. +* `SYNAPSE_CONFIG_PATH`: path to the config file. Defaults to + `<SYNAPSE_CONFIG_DIR>/homeserver.yaml`. +* `UID`, `GID`: the user and group id to run Synapse as. Defaults to `991`, `991`. + +## TLS support + +The default configuration exposes a single HTTP port: http://localhost:8008. It +is suitable for local testing, but for any practical use, you will either need +to use a reverse proxy, or configure Synapse to expose an HTTPS port. + +For documentation on using a reverse proxy, see +https://github.com/matrix-org/synapse/blob/master/docs/reverse_proxy.rst. + +For more information on enabling TLS support in synapse itself, see +https://github.com/matrix-org/synapse/blob/master/INSTALL.md#tls-certificates. Of +course, you will need to expose the TLS port from the container with a `-p` +argument to `docker run`. + +## Legacy dynamic configuration file support + +For backwards-compatibility only, the docker image supports creating a dynamic +configuration file based on environment variables. This is now deprecated, but +is enabled when the `SYNAPSE_SERVER_NAME` variable is set (and `generate` is +not given). + +To migrate from a dynamic configuration file to a static one, run the docker +container once with the environment variables set, and `migrate_config` +commandline option. For example: + +``` +docker run -it --rm \ + --mount type=volume,src=synapse-data,dst=/data \ + -e SYNAPSE_SERVER_NAME=my.matrix.host \ + -e SYNAPSE_REPORT_STATS=yes \ + matrixdotorg/synapse:latest migrate_config +``` + +This will generate the same configuration file as the legacy mode used, but +will store it in `/data/homeserver.yaml` instead of a temporary location. You +can then use it as shown above at [Running synapse](#running-synapse). diff --git a/docker/conf/homeserver.yaml b/docker/conf/homeserver.yaml index babd5bef9e..b0267b1c60 100644 --- a/docker/conf/homeserver.yaml +++ b/docker/conf/homeserver.yaml @@ -21,7 +21,7 @@ server_name: "{{ SYNAPSE_SERVER_NAME }}" pid_file: /homeserver.pid web_client: False soft_file_limit: 0 -log_config: "/compiled/log.config" +log_config: "{{ SYNAPSE_LOG_CONFIG }}" ## Ports ## diff --git a/docker/start.py b/docker/start.py index a7a54dacf7..40a861f200 100755 --- a/docker/start.py +++ b/docker/start.py @@ -1,109 +1,243 @@ #!/usr/local/bin/python -import jinja2 +import codecs +import glob import os -import sys import subprocess -import glob -import codecs +import sys + +import jinja2 + # Utility functions -convert = lambda src, dst, environ: open(dst, "w").write( - jinja2.Template(open(src).read()).render(**environ) -) +def log(txt): + print(txt, file=sys.stderr) + + +def error(txt): + log(txt) + sys.exit(2) -def check_arguments(environ, args): - for argument in args: - if argument not in environ: - print("Environment variable %s is mandatory, exiting." % argument) - sys.exit(2) +def convert(src, dst, environ): + """Generate a file from a template + Args: + src (str): path to input file + dst (str): path to file to write + environ (dict): environment dictionary, for replacement mappings. + """ + with open(src) as infile: + template = infile.read() + rendered = jinja2.Template(template).render(**environ) + with open(dst, "w") as outfile: + outfile.write(rendered) + + +def generate_config_from_template(config_dir, config_path, environ, ownership): + """Generate a homeserver.yaml from environment variables + + Args: + config_dir (str): where to put generated config files + config_path (str): where to put the main config file + environ (dict): environment dictionary + ownership (str): "<user>:<group>" string which will be used to set + ownership of the generated configs + """ + for v in ("SYNAPSE_SERVER_NAME", "SYNAPSE_REPORT_STATS"): + if v not in environ: + error( + "Environment variable '%s' is mandatory when generating a config file." + % (v,) + ) + + # populate some params from data files (if they exist, else create new ones) + environ = environ.copy() + secrets = { + "registration": "SYNAPSE_REGISTRATION_SHARED_SECRET", + "macaroon": "SYNAPSE_MACAROON_SECRET_KEY", + } -def generate_secrets(environ, secrets): for name, secret in secrets.items(): if secret not in environ: filename = "/data/%s.%s.key" % (environ["SYNAPSE_SERVER_NAME"], name) + + # if the file already exists, load in the existing value; otherwise, + # generate a new secret and write it to a file + if os.path.exists(filename): + log("Reading %s from %s" % (secret, filename)) with open(filename) as handle: value = handle.read() else: - print("Generating a random secret for {}".format(name)) + log("Generating a random secret for {}".format(secret)) value = codecs.encode(os.urandom(32), "hex").decode() with open(filename, "w") as handle: handle.write(value) environ[secret] = value + environ["SYNAPSE_APPSERVICES"] = glob.glob("/data/appservices/*.yaml") + if not os.path.exists(config_dir): + os.mkdir(config_dir) + + # Convert SYNAPSE_NO_TLS to boolean if exists + if "SYNAPSE_NO_TLS" in environ: + tlsanswerstring = str.lower(environ["SYNAPSE_NO_TLS"]) + if tlsanswerstring in ("true", "on", "1", "yes"): + environ["SYNAPSE_NO_TLS"] = True + else: + if tlsanswerstring in ("false", "off", "0", "no"): + environ["SYNAPSE_NO_TLS"] = False + else: + error( + 'Environment variable "SYNAPSE_NO_TLS" found but value "' + + tlsanswerstring + + '" unrecognized; exiting.' + ) + + if "SYNAPSE_LOG_CONFIG" not in environ: + environ["SYNAPSE_LOG_CONFIG"] = config_dir + "/log.config" + + log("Generating synapse config file " + config_path) + convert("/conf/homeserver.yaml", config_path, environ) + + log_config_file = environ["SYNAPSE_LOG_CONFIG"] + log("Generating log config file " + log_config_file) + convert("/conf/log.config", log_config_file, environ) -# Prepare the configuration -mode = sys.argv[1] if len(sys.argv) > 1 else None -environ = os.environ.copy() -ownership = "{}:{}".format(environ.get("UID", 991), environ.get("GID", 991)) -args = ["python", "-m", "synapse.app.homeserver"] + subprocess.check_output(["chown", "-R", ownership, "/data"]) -# In generate mode, generate a configuration, missing keys, then exit -if mode == "generate": - check_arguments( - environ, ("SYNAPSE_SERVER_NAME", "SYNAPSE_REPORT_STATS", "SYNAPSE_CONFIG_PATH") + # Hopefully we already have a signing key, but generate one if not. + subprocess.check_output( + [ + "su-exec", + ownership, + "python", + "-m", + "synapse.app.homeserver", + "--config-path", + config_path, + # tell synapse to put generated keys in /data rather than /compiled + "--keys-directory", + config_dir, + "--generate-keys", + ] ) - args += [ + + +def run_generate_config(environ, ownership): + """Run synapse with a --generate-config param to generate a template config file + + Args: + environ (dict): env var dict + ownership (str): "userid:groupid" arg for chmod + + Never returns. + """ + for v in ("SYNAPSE_SERVER_NAME", "SYNAPSE_REPORT_STATS"): + if v not in environ: + error("Environment variable '%s' is mandatory in `generate` mode." % (v,)) + + server_name = environ["SYNAPSE_SERVER_NAME"] + config_dir = environ.get("SYNAPSE_CONFIG_DIR", "/data") + config_path = environ.get("SYNAPSE_CONFIG_PATH", config_dir + "/homeserver.yaml") + data_dir = environ.get("SYNAPSE_DATA_DIR", "/data") + + # create a suitable log config from our template + log_config_file = "%s/%s.log.config" % (config_dir, server_name) + if not os.path.exists(log_config_file): + log("Creating log config %s" % (log_config_file,)) + convert("/conf/log.config", log_config_file, environ) + + # make sure that synapse has perms to write to the data dir. + subprocess.check_output(["chown", ownership, data_dir]) + + args = [ + "python", + "-m", + "synapse.app.homeserver", "--server-name", - environ["SYNAPSE_SERVER_NAME"], + server_name, "--report-stats", environ["SYNAPSE_REPORT_STATS"], "--config-path", - environ["SYNAPSE_CONFIG_PATH"], + config_path, + "--config-directory", + config_dir, + "--data-directory", + data_dir, "--generate-config", + "--open-private-ports", ] + # log("running %s" % (args, )) os.execv("/usr/local/bin/python", args) -# In normal mode, generate missing keys if any, then run synapse -else: - if "SYNAPSE_CONFIG_PATH" in environ: - config_path = environ["SYNAPSE_CONFIG_PATH"] - else: - check_arguments(environ, ("SYNAPSE_SERVER_NAME", "SYNAPSE_REPORT_STATS")) - generate_secrets( - environ, - { - "registration": "SYNAPSE_REGISTRATION_SHARED_SECRET", - "macaroon": "SYNAPSE_MACAROON_SECRET_KEY", - }, + +def main(args, environ): + mode = args[1] if len(args) > 1 else None + ownership = "{}:{}".format(environ.get("UID", 991), environ.get("GID", 991)) + + # In generate mode, generate a configuration and missing keys, then exit + if mode == "generate": + return run_generate_config(environ, ownership) + + if mode == "migrate_config": + # generate a config based on environment vars. + config_dir = environ.get("SYNAPSE_CONFIG_DIR", "/data") + config_path = environ.get( + "SYNAPSE_CONFIG_PATH", config_dir + "/homeserver.yaml" + ) + return generate_config_from_template( + config_dir, config_path, environ, ownership ) - environ["SYNAPSE_APPSERVICES"] = glob.glob("/data/appservices/*.yaml") - if not os.path.exists("/compiled"): - os.mkdir("/compiled") + + if mode is not None: + error("Unknown execution mode '%s'" % (mode,)) + + if "SYNAPSE_SERVER_NAME" in environ: + # backwards-compatibility generate-a-config-on-the-fly mode + if "SYNAPSE_CONFIG_PATH" in environ: + error( + "SYNAPSE_SERVER_NAME and SYNAPSE_CONFIG_PATH are mutually exclusive " + "except in `generate` or `migrate_config` mode." + ) config_path = "/compiled/homeserver.yaml" + log( + "Generating config file '%s' on-the-fly from environment variables.\n" + "Note that this mode is deprecated. You can migrate to a static config\n" + "file by running with 'migrate_config'. See the README for more details." + % (config_path,) + ) - # Convert SYNAPSE_NO_TLS to boolean if exists - if "SYNAPSE_NO_TLS" in environ: - tlsanswerstring = str.lower(environ["SYNAPSE_NO_TLS"]) - if tlsanswerstring in ("true", "on", "1", "yes"): - environ["SYNAPSE_NO_TLS"] = True - else: - if tlsanswerstring in ("false", "off", "0", "no"): - environ["SYNAPSE_NO_TLS"] = False - else: - print( - 'Environment variable "SYNAPSE_NO_TLS" found but value "' - + tlsanswerstring - + '" unrecognized; exiting.' - ) - sys.exit(2) - - convert("/conf/homeserver.yaml", config_path, environ) - convert("/conf/log.config", "/compiled/log.config", environ) - subprocess.check_output(["chown", "-R", ownership, "/data"]) - - args += [ + generate_config_from_template("/compiled", config_path, environ, ownership) + else: + config_dir = environ.get("SYNAPSE_CONFIG_DIR", "/data") + config_path = environ.get( + "SYNAPSE_CONFIG_PATH", config_dir + "/homeserver.yaml" + ) + if not os.path.exists(config_path): + error( + "Config file '%s' does not exist. You should either create a new " + "config file by running with the `generate` argument (and then edit " + "the resulting file before restarting) or specify the path to an " + "existing config file with the SYNAPSE_CONFIG_PATH variable." + % (config_path,) + ) + + log("Starting synapse with config file " + config_path) + + args = [ + "su-exec", + ownership, + "python", + "-m", + "synapse.app.homeserver", "--config-path", config_path, - # tell synapse to put any generated keys in /data rather than /compiled - "--keys-directory", - "/data", ] + os.execv("/sbin/su-exec", args) + - # Generate missing keys and start synapse - subprocess.check_output(args + ["--generate-keys"]) - os.execv("/sbin/su-exec", ["su-exec", ownership] + args) +if __name__ == "__main__": + main(sys.argv, os.environ) |