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Diffstat (limited to 'docker/configure_workers_and_start.py')
| -rwxr-xr-x | docker/configure_workers_and_start.py | 558 |
1 files changed, 558 insertions, 0 deletions
diff --git a/docker/configure_workers_and_start.py b/docker/configure_workers_and_start.py new file mode 100755 index 0000000000..4be6afc65d --- /dev/null +++ b/docker/configure_workers_and_start.py @@ -0,0 +1,558 @@ +#!/usr/bin/env python +# Copyright 2021 The Matrix.org Foundation C.I.C. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +# This script reads environment variables and generates a shared Synapse worker, +# nginx and supervisord configs depending on the workers requested. +# +# The environment variables it reads are: +# * SYNAPSE_SERVER_NAME: The desired server_name of the homeserver. +# * SYNAPSE_REPORT_STATS: Whether to report stats. +# * SYNAPSE_WORKER_TYPES: A comma separated list of worker names as specified in WORKER_CONFIG +# below. Leave empty for no workers, or set to '*' for all possible workers. +# +# NOTE: According to Complement's ENTRYPOINT expectations for a homeserver image (as defined +# in the project's README), this script may be run multiple times, and functionality should +# continue to work if so. + +import os +import subprocess +import sys + +import jinja2 +import yaml + +MAIN_PROCESS_HTTP_LISTENER_PORT = 8080 + + +WORKERS_CONFIG = { + "pusher": { + "app": "synapse.app.pusher", + "listener_resources": [], + "endpoint_patterns": [], + "shared_extra_conf": {"start_pushers": False}, + "worker_extra_conf": "", + }, + "user_dir": { + "app": "synapse.app.user_dir", + "listener_resources": ["client"], + "endpoint_patterns": [ + "^/_matrix/client/(api/v1|r0|unstable)/user_directory/search$" + ], + "shared_extra_conf": {"update_user_directory": False}, + "worker_extra_conf": "", + }, + "media_repository": { + "app": "synapse.app.media_repository", + "listener_resources": ["media"], + "endpoint_patterns": [ + "^/_matrix/media/", + "^/_synapse/admin/v1/purge_media_cache$", + "^/_synapse/admin/v1/room/.*/media.*$", + "^/_synapse/admin/v1/user/.*/media.*$", + "^/_synapse/admin/v1/media/.*$", + "^/_synapse/admin/v1/quarantine_media/.*$", + ], + "shared_extra_conf": {"enable_media_repo": False}, + "worker_extra_conf": "enable_media_repo: true", + }, + "appservice": { + "app": "synapse.app.appservice", + "listener_resources": [], + "endpoint_patterns": [], + "shared_extra_conf": {"notify_appservices": False}, + "worker_extra_conf": "", + }, + "federation_sender": { + "app": "synapse.app.federation_sender", + "listener_resources": [], + "endpoint_patterns": [], + "shared_extra_conf": {"send_federation": False}, + "worker_extra_conf": "", + }, + "synchrotron": { + "app": "synapse.app.generic_worker", + "listener_resources": ["client"], + "endpoint_patterns": [ + "^/_matrix/client/(v2_alpha|r0)/sync$", + "^/_matrix/client/(api/v1|v2_alpha|r0)/events$", + "^/_matrix/client/(api/v1|r0)/initialSync$", + "^/_matrix/client/(api/v1|r0)/rooms/[^/]+/initialSync$", + ], + "shared_extra_conf": {}, + "worker_extra_conf": "", + }, + "federation_reader": { + "app": "synapse.app.generic_worker", + "listener_resources": ["federation"], + "endpoint_patterns": [ + "^/_matrix/federation/(v1|v2)/event/", + "^/_matrix/federation/(v1|v2)/state/", + "^/_matrix/federation/(v1|v2)/state_ids/", + "^/_matrix/federation/(v1|v2)/backfill/", + "^/_matrix/federation/(v1|v2)/get_missing_events/", + "^/_matrix/federation/(v1|v2)/publicRooms", + "^/_matrix/federation/(v1|v2)/query/", + "^/_matrix/federation/(v1|v2)/make_join/", + "^/_matrix/federation/(v1|v2)/make_leave/", + "^/_matrix/federation/(v1|v2)/send_join/", + "^/_matrix/federation/(v1|v2)/send_leave/", + "^/_matrix/federation/(v1|v2)/invite/", + "^/_matrix/federation/(v1|v2)/query_auth/", + "^/_matrix/federation/(v1|v2)/event_auth/", + "^/_matrix/federation/(v1|v2)/exchange_third_party_invite/", + "^/_matrix/federation/(v1|v2)/user/devices/", + "^/_matrix/federation/(v1|v2)/get_groups_publicised$", + "^/_matrix/key/v2/query", + ], + "shared_extra_conf": {}, + "worker_extra_conf": "", + }, + "federation_inbound": { + "app": "synapse.app.generic_worker", + "listener_resources": ["federation"], + "endpoint_patterns": ["/_matrix/federation/(v1|v2)/send/"], + "shared_extra_conf": {}, + "worker_extra_conf": "", + }, + "event_persister": { + "app": "synapse.app.generic_worker", + "listener_resources": ["replication"], + "endpoint_patterns": [], + "shared_extra_conf": {}, + "worker_extra_conf": "", + }, + "background_worker": { + "app": "synapse.app.generic_worker", + "listener_resources": [], + "endpoint_patterns": [], + # This worker cannot be sharded. Therefore there should only ever be one background + # worker, and it should be named background_worker1 + "shared_extra_conf": {"run_background_tasks_on": "background_worker1"}, + "worker_extra_conf": "", + }, + "event_creator": { + "app": "synapse.app.generic_worker", + "listener_resources": ["client"], + "endpoint_patterns": [ + "^/_matrix/client/(api/v1|r0|unstable)/rooms/.*/redact", + "^/_matrix/client/(api/v1|r0|unstable)/rooms/.*/send", + "^/_matrix/client/(api/v1|r0|unstable)/rooms/.*/(join|invite|leave|ban|unban|kick)$", + "^/_matrix/client/(api/v1|r0|unstable)/join/", + "^/_matrix/client/(api/v1|r0|unstable)/profile/", + ], + "shared_extra_conf": {}, + "worker_extra_conf": "", + }, + "frontend_proxy": { + "app": "synapse.app.frontend_proxy", + "listener_resources": ["client", "replication"], + "endpoint_patterns": ["^/_matrix/client/(api/v1|r0|unstable)/keys/upload"], + "shared_extra_conf": {}, + "worker_extra_conf": ( + "worker_main_http_uri: http://127.0.0.1:%d" + % (MAIN_PROCESS_HTTP_LISTENER_PORT,), + ), + }, +} + +# Templates for sections that may be inserted multiple times in config files +SUPERVISORD_PROCESS_CONFIG_BLOCK = """ +[program:synapse_{name}] +command=/usr/local/bin/python -m {app} \ + --config-path="{config_path}" \ + --config-path=/conf/workers/shared.yaml \ + --config-path=/conf/workers/{name}.yaml +autorestart=unexpected +priority=500 +exitcodes=0 +stdout_logfile=/dev/stdout +stdout_logfile_maxbytes=0 +stderr_logfile=/dev/stderr +stderr_logfile_maxbytes=0 +""" + +NGINX_LOCATION_CONFIG_BLOCK = """ + location ~* {endpoint} { + proxy_pass {upstream}; + proxy_set_header X-Forwarded-For $remote_addr; + proxy_set_header X-Forwarded-Proto $scheme; + proxy_set_header Host $host; + } +""" + +NGINX_UPSTREAM_CONFIG_BLOCK = """ +upstream {upstream_worker_type} { +{body} +} +""" + + +# Utility functions +def log(txt: str): + """Log something to the stdout. + + Args: + txt: The text to log. + """ + print(txt) + + +def error(txt: str): + """Log something and exit with an error code. + + Args: + txt: The text to log in error. + """ + log(txt) + sys.exit(2) + + +def convert(src: str, dst: str, **template_vars): + """Generate a file from a template + + Args: + src: Path to the input file. + dst: Path to write to. + template_vars: The arguments to replace placeholder variables in the template with. + """ + # Read the template file + with open(src) as infile: + template = infile.read() + + # Generate a string from the template. We disable autoescape to prevent template + # variables from being escaped. + rendered = jinja2.Template(template, autoescape=False).render(**template_vars) + + # Write the generated contents to a file + # + # We use append mode in case the files have already been written to by something else + # (for instance, as part of the instructions in a dockerfile). + with open(dst, "a") as outfile: + # In case the existing file doesn't end with a newline + outfile.write("\n") + + outfile.write(rendered) + + +def add_sharding_to_shared_config( + shared_config: dict, + worker_type: str, + worker_name: str, + worker_port: int, +) -> None: + """Given a dictionary representing a config file shared across all workers, + append sharded worker information to it for the current worker_type instance. + + Args: + shared_config: The config dict that all worker instances share (after being converted to YAML) + worker_type: The type of worker (one of those defined in WORKERS_CONFIG). + worker_name: The name of the worker instance. + worker_port: The HTTP replication port that the worker instance is listening on. + """ + # The instance_map config field marks the workers that write to various replication streams + instance_map = shared_config.setdefault("instance_map", {}) + + # Worker-type specific sharding config + if worker_type == "pusher": + shared_config.setdefault("pusher_instances", []).append(worker_name) + + elif worker_type == "federation_sender": + shared_config.setdefault("federation_sender_instances", []).append(worker_name) + + elif worker_type == "event_persister": + # Event persisters write to the events stream, so we need to update + # the list of event stream writers + shared_config.setdefault("stream_writers", {}).setdefault("events", []).append( + worker_name + ) + + # Map of stream writer instance names to host/ports combos + instance_map[worker_name] = { + "host": "localhost", + "port": worker_port, + } + + elif worker_type == "media_repository": + # The first configured media worker will run the media background jobs + shared_config.setdefault("media_instance_running_background_jobs", worker_name) + + +def generate_base_homeserver_config(): + """Starts Synapse and generates a basic homeserver config, which will later be + modified for worker support. + + Raises: CalledProcessError if calling start.py returned a non-zero exit code. + """ + # start.py already does this for us, so just call that. + # note that this script is copied in in the official, monolith dockerfile + os.environ["SYNAPSE_HTTP_PORT"] = str(MAIN_PROCESS_HTTP_LISTENER_PORT) + subprocess.check_output(["/usr/local/bin/python", "/start.py", "migrate_config"]) + + +def generate_worker_files(environ, config_path: str, data_dir: str): + """Read the desired list of workers from environment variables and generate + shared homeserver, nginx and supervisord configs. + + Args: + environ: _Environ[str] + config_path: Where to output the generated Synapse main worker config file. + data_dir: The location of the synapse data directory. Where log and + user-facing config files live. + """ + # Note that yaml cares about indentation, so care should be taken to insert lines + # into files at the correct indentation below. + + # shared_config is the contents of a Synapse config file that will be shared amongst + # the main Synapse process as well as all workers. + # It is intended mainly for disabling functionality when certain workers are spun up, + # and adding a replication listener. + + # First read the original config file and extract the listeners block. Then we'll add + # another listener for replication. Later we'll write out the result. + listeners = [ + { + "port": 9093, + "bind_address": "127.0.0.1", + "type": "http", + "resources": [{"names": ["replication"]}], + } + ] + with open(config_path) as file_stream: + original_config = yaml.safe_load(file_stream) + original_listeners = original_config.get("listeners") + if original_listeners: + listeners += original_listeners + + # The shared homeserver config. The contents of which will be inserted into the + # base shared worker jinja2 template. + # + # This config file will be passed to all workers, included Synapse's main process. + shared_config = {"listeners": listeners} + + # The supervisord config. The contents of which will be inserted into the + # base supervisord jinja2 template. + # + # Supervisord will be in charge of running everything, from redis to nginx to Synapse + # and all of its worker processes. Load the config template, which defines a few + # services that are necessary to run. + supervisord_config = "" + + # Upstreams for load-balancing purposes. This dict takes the form of a worker type to the + # ports of each worker. For example: + # { + # worker_type: {1234, 1235, ...}} + # } + # and will be used to construct 'upstream' nginx directives. + nginx_upstreams = {} + + # A map of: {"endpoint": "upstream"}, where "upstream" is a str representing what will be + # placed after the proxy_pass directive. The main benefit to representing this data as a + # dict over a str is that we can easily deduplicate endpoints across multiple instances + # of the same worker. + # + # An nginx site config that will be amended to depending on the workers that are + # spun up. To be placed in /etc/nginx/conf.d. + nginx_locations = {} + + # Read the desired worker configuration from the environment + worker_types = environ.get("SYNAPSE_WORKER_TYPES") + if worker_types is None: + # No workers, just the main process + worker_types = [] + else: + # Split type names by comma + worker_types = worker_types.split(",") + + # Create the worker configuration directory if it doesn't already exist + os.makedirs("/conf/workers", exist_ok=True) + + # Start worker ports from this arbitrary port + worker_port = 18009 + + # A counter of worker_type -> int. Used for determining the name for a given + # worker type when generating its config file, as each worker's name is just + # worker_type + instance # + worker_type_counter = {} + + # For each worker type specified by the user, create config values + for worker_type in worker_types: + worker_type = worker_type.strip() + + worker_config = WORKERS_CONFIG.get(worker_type) + if worker_config: + worker_config = worker_config.copy() + else: + log(worker_type + " is an unknown worker type! It will be ignored") + continue + + new_worker_count = worker_type_counter.setdefault(worker_type, 0) + 1 + worker_type_counter[worker_type] = new_worker_count + + # Name workers by their type concatenated with an incrementing number + # e.g. federation_reader1 + worker_name = worker_type + str(new_worker_count) + worker_config.update( + {"name": worker_name, "port": worker_port, "config_path": config_path} + ) + + # Update the shared config with any worker-type specific options + shared_config.update(worker_config["shared_extra_conf"]) + + # Check if more than one instance of this worker type has been specified + worker_type_total_count = worker_types.count(worker_type) + if worker_type_total_count > 1: + # Update the shared config with sharding-related options if necessary + add_sharding_to_shared_config( + shared_config, worker_type, worker_name, worker_port + ) + + # Enable the worker in supervisord + supervisord_config += SUPERVISORD_PROCESS_CONFIG_BLOCK.format_map(worker_config) + + # Add nginx location blocks for this worker's endpoints (if any are defined) + for pattern in worker_config["endpoint_patterns"]: + # Determine whether we need to load-balance this worker + if worker_type_total_count > 1: + # Create or add to a load-balanced upstream for this worker + nginx_upstreams.setdefault(worker_type, set()).add(worker_port) + + # Upstreams are named after the worker_type + upstream = "http://" + worker_type + else: + upstream = "http://localhost:%d" % (worker_port,) + + # Note that this endpoint should proxy to this upstream + nginx_locations[pattern] = upstream + + # Write out the worker's logging config file + + # Check whether we should write worker logs to disk, in addition to the console + extra_log_template_args = {} + if environ.get("SYNAPSE_WORKERS_WRITE_LOGS_TO_DISK"): + extra_log_template_args["LOG_FILE_PATH"] = "{dir}/logs/{name}.log".format( + dir=data_dir, name=worker_name + ) + + # Render and write the file + log_config_filepath = "/conf/workers/{name}.log.config".format(name=worker_name) + convert( + "/conf/log.config", + log_config_filepath, + worker_name=worker_name, + **extra_log_template_args, + ) + + # Then a worker config file + convert( + "/conf/worker.yaml.j2", + "/conf/workers/{name}.yaml".format(name=worker_name), + **worker_config, + worker_log_config_filepath=log_config_filepath, + ) + + worker_port += 1 + + # Build the nginx location config blocks + nginx_location_config = "" + for endpoint, upstream in nginx_locations.items(): + nginx_location_config += NGINX_LOCATION_CONFIG_BLOCK.format( + endpoint=endpoint, + upstream=upstream, + ) + + # Determine the load-balancing upstreams to configure + nginx_upstream_config = "" + for upstream_worker_type, upstream_worker_ports in nginx_upstreams.items(): + body = "" + for port in upstream_worker_ports: + body += " server localhost:%d;\n" % (port,) + + # Add to the list of configured upstreams + nginx_upstream_config += NGINX_UPSTREAM_CONFIG_BLOCK.format( + upstream_worker_type=upstream_worker_type, + body=body, + ) + + # Finally, we'll write out the config files. + + # Shared homeserver config + convert( + "/conf/shared.yaml.j2", + "/conf/workers/shared.yaml", + shared_worker_config=yaml.dump(shared_config), + ) + + # Nginx config + convert( + "/conf/nginx.conf.j2", + "/etc/nginx/conf.d/matrix-synapse.conf", + worker_locations=nginx_location_config, + upstream_directives=nginx_upstream_config, + ) + + # Supervisord config + convert( + "/conf/supervisord.conf.j2", + "/etc/supervisor/conf.d/supervisord.conf", + main_config_path=config_path, + worker_config=supervisord_config, + ) + + # Ensure the logging directory exists + log_dir = data_dir + "/logs" + if not os.path.exists(log_dir): + os.mkdir(log_dir) + + +def start_supervisord(): + """Starts up supervisord which then starts and monitors all other necessary processes + + Raises: CalledProcessError if calling start.py return a non-zero exit code. + """ + subprocess.run(["/usr/bin/supervisord"], stdin=subprocess.PIPE) + + +def main(args, environ): + 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") + + # override SYNAPSE_NO_TLS, we don't support TLS in worker mode, + # this needs to be handled by a frontend proxy + environ["SYNAPSE_NO_TLS"] = "yes" + + # Generate the base homeserver config if one does not yet exist + if not os.path.exists(config_path): + log("Generating base homeserver config") + generate_base_homeserver_config() + + # This script may be run multiple times (mostly by Complement, see note at top of file). + # Don't re-configure workers in this instance. + mark_filepath = "/conf/workers_have_been_configured" + if not os.path.exists(mark_filepath): + # Always regenerate all other config files + generate_worker_files(environ, config_path, data_dir) + + # Mark workers as being configured + with open(mark_filepath, "w") as f: + f.write("") + + # Start supervisord, which will start Synapse, all of the configured worker + # processes, redis, nginx etc. according to the config we created above. + start_supervisord() + + +if __name__ == "__main__": + main(sys.argv, os.environ) |