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< ol class = "chapter" > < li class = "chapter-item expanded affix " > < li class = "part-title" > Introduction< / li > < li class = "chapter-item expanded " > < a href = "welcome_and_overview.html" > Welcome and Overview< / a > < / li > < li class = "chapter-item expanded affix " > < li class = "part-title" > Setup< / li > < li class = "chapter-item expanded " > < a href = "setup/installation.html" > Installation< / a > < / li > < li class = "chapter-item expanded " > < a href = "postgres.html" > Using Postgres< / a > < / li > < li class = "chapter-item expanded " > < a href = "reverse_proxy.html" > Configuring a Reverse Proxy< / a > < / li > < li class = "chapter-item expanded " > < a href = "setup/forward_proxy.html" > Configuring a Forward/Outbound Proxy< / a > < / li > < li class = "chapter-item expanded " > < a href = "turn-howto.html" > Configuring a Turn Server< / a > < / li > < li > < ol class = "section" > < li class = "chapter-item expanded " > < a href = "setup/turn/coturn.html" > coturn TURN server< / a > < / li > < li class = "chapter-item expanded " > < a href = "setup/turn/eturnal.html" > eturnal TURN server< / a > < / li > < / ol > < / li > < li class = "chapter-item expanded " > < a href = "delegate.html" > Delegation< / a > < / li > < li class = "chapter-item expanded affix " > < li class = "part-title" > Upgrading< / li > < li class = "chapter-item expanded " > < a href = "upgrade.html" > Upgrading between Synapse Versions< / a > < / li > < li class = "chapter-item expanded affix " > < li class = "part-title" > Usage< / li > < li class = "chapter-item expanded " > < a href = "federate.html" > Federation< / a > < / li > < li class = "chapter-item expanded " > < a href = "usage/configuration/index.html" > Configuration< / a > < / li > < li > < ol class = "section" > < li class = "chapter-item expanded " > < a href = "usage/configuration/config_documentation.html" > Configuration Manual< / a > < / li > < li class = "chapter-item expanded " > < a href = "usage/configuration/homeserver_sample_config.html" > Homeserver Sample Config File< / a > < / li > < li class = "chapter-item expanded " > < a href = "usage/configuration/logging_sample_config.html" > Logging Sample Config File< / a > < / li > < li class = "chapter-item expanded " > < a href = "structured_logging.html" > Structured Logging< / a > < / li > < li class = "chapter-item expanded " > < a href = "templates.html" > Templates< / a > < / li > < li class = "chapter-item expanded " > < a href = "usage/configuration/user_authentication/index.html" > User Authentication< / a > < / li > < li > < ol class = "section" > < li class = "chapter-item expanded " > < a href = "usage/configuration/user_authentication/single_sign_on/index.html" > Single-Sign On< / a > < / li > < li > < ol class = "section" > < li class = "chapter-item expanded " > < a href = "openid.html" > OpenID Connect< / a > < / li > < li class = "chapter-item expanded " > < a href = "usage/configuration/user_authentication/single_sign_on/saml.html" > SAML< / a > < / li > < li class = "chapter-item expanded " > < a href = "usage/configuration/user_authentication/single_sign_on/cas.html" > CAS< / a > < / li > < li class = "chapter-item expanded " > < a href = "sso_mapping_providers.html" > SSO Mapping Providers< / a > < / li > < / ol > < / li > < li class = "chapter-item expanded " > < a href = "password_auth_providers.html" > Password Auth Providers< / a > < / li > < li class = "chapter-item expanded " > < a href = "jwt.html" > JSON Web Tokens< / a > < / li > < li class = "chapter-item expanded " > < a href = "usage/configuration/user_authentication/refresh_tokens.html" > Refresh Tokens< / a > < / li > < / ol > < / li > < li class = "chapter-item expanded " > < a href = "CAPTCHA_SETUP.html" > Registration Captcha< / a > < / li > < li class = "chapter-item expanded " > < a href = "application_services.html" > Application Services< / a > < / li > < li class = "chapter-item expanded " > < a href = "server_notices.html" > Server Notices< / a > < / li > < li class = "chapter-item expanded " > < a href = "consent_tracking.html" > Consent Tracking< / a > < / li > < li class = "chapter-item expanded " > < a href = "user_directory.html" > User Directory< / a > < / li > < li class = "chapter-item expanded " > < a href = "message_retention_policies.html" > Message Retention Policies< / a > < / li > < li class = "chapter-item expanded " > < a href = "modules/index.html" > Pluggable Modules< / a > < / li > < li > < ol class = "section" > < li class = "chapter-item expanded " > < a href = "modules/writing_a_module.html" > Writing a module< / a > < / li > < li > < ol class = "section" > < li class = "chapter-item expanded " > < a href = "modules/spam_checker_callbacks.html" > Spam checker callbacks< / a > < / li > < li class = "chapter-item
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< h1 id = "scaling-synapse-via-workers" > < a class = "header" href = "#scaling-synapse-via-workers" > Scaling synapse via workers< / a > < / h1 >
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< p > For small instances it is recommended to run Synapse in the default monolith mode.
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For larger instances where performance is a concern it can be helpful to split
out functionality into multiple separate python processes. These processes are
called 'workers', and are (eventually) intended to scale horizontally
independently.< / p >
< p > Synapse's worker support is under active development and subject to change as
we attempt to rapidly scale ever larger Synapse instances. However we are
documenting it here to help admins needing a highly scalable Synapse instance
similar to the one running < code > matrix.org< / code > .< / p >
< p > All processes continue to share the same database instance, and as such,
workers only work with PostgreSQL-based Synapse deployments. SQLite should only
be used for demo purposes and any admin considering workers should already be
running PostgreSQL.< / p >
< p > See also < a href = "https://matrix.org/blog/2020/11/03/how-we-fixed-synapses-scalability" > Matrix.org blog post< / a >
for a higher level overview.< / p >
< h2 id = "main-processworker-communication" > < a class = "header" href = "#main-processworker-communication" > Main process/worker communication< / a > < / h2 >
< p > The processes communicate with each other via a Synapse-specific protocol called
'replication' (analogous to MySQL- or Postgres-style database replication) which
feeds streams of newly written data between processes so they can be kept in
sync with the database state.< / p >
< p > When configured to do so, Synapse uses a
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< a href = "https://redis.io/docs/manual/pubsub/" > Redis pub/sub channel< / a > to send the replication
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stream between all configured Synapse processes. Additionally, processes may
make HTTP requests to each other, primarily for operations which need to wait
for a reply ─ such as sending an event.< / p >
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< p > All the workers and the main process connect to Redis, which relays replication
commands between processes.< / p >
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< p > If Redis support is enabled Synapse will use it as a shared cache, as well as a
pub/sub mechanism.< / p >
< p > See the < a href = "#architectural-diagram" > Architectural diagram< / a > section at the end for
a visualisation of what this looks like.< / p >
< h2 id = "setting-up-workers" > < a class = "header" href = "#setting-up-workers" > Setting up workers< / a > < / h2 >
< p > A Redis server is required to manage the communication between the processes.
The Redis server should be installed following the normal procedure for your
distribution (e.g. < code > apt install redis-server< / code > on Debian). It is safe to use an
existing Redis deployment if you have one.< / p >
< p > Once installed, check that Redis is running and accessible from the host running
Synapse, for example by executing < code > echo PING | nc -q1 localhost 6379< / code > and seeing
a response of < code > +PONG< / code > .< / p >
< p > The appropriate dependencies must also be installed for Synapse. If using a
virtualenv, these can be installed with:< / p >
< pre > < code class = "language-sh" > pip install " matrix-synapse[redis]"
< / code > < / pre >
< p > Note that these dependencies are included when synapse is installed with < code > pip install matrix-synapse[all]< / code > . They are also included in the debian packages from
< code > matrix.org< / code > and in the docker images at
https://hub.docker.com/r/matrixdotorg/synapse/.< / p >
< p > To make effective use of the workers, you will need to configure an HTTP
reverse-proxy such as nginx or haproxy, which will direct incoming requests to
the correct worker, or to the main synapse instance. See
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< a href = "reverse_proxy.html" > the reverse proxy documentation< / a > for information on setting up a reverse
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proxy.< / p >
< p > When using workers, each worker process has its own configuration file which
contains settings specific to that worker, such as the HTTP listener that it
provides (if any), logging configuration, etc.< / p >
< p > Normally, the worker processes are configured to read from a shared
configuration file as well as the worker-specific configuration files. This
makes it easier to keep common configuration settings synchronised across all
the processes.< / p >
< p > The main process is somewhat special in this respect: it does not normally
need its own configuration file and can take all of its configuration from the
shared configuration file.< / p >
< h3 id = "shared-configuration" > < a class = "header" href = "#shared-configuration" > Shared configuration< / a > < / h3 >
< p > Normally, only a couple of changes are needed to make an existing configuration
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file suitable for use with workers. First, you need to enable an
< a href = "usage/configuration/config_documentation.html#listeners" > " HTTP replication listener" < / a >
for the main process; and secondly, you need to enable
< a href = "usage/configuration/config_documentation.html#redis" > redis-based replication< / a > .
Optionally, a < a href = "usage/configuration/config_documentation.html#worker_replication_secret" > shared secret< / a >
can be used to authenticate HTTP traffic between workers. For example:< / p >
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< pre > < code class = "language-yaml" > # extend the existing `listeners` section. This defines the ports that the
# main process will listen on.
listeners:
# The HTTP replication port
- port: 9093
bind_address: '127.0.0.1'
type: http
resources:
- names: [replication]
# Add a random shared secret to authenticate traffic.
worker_replication_secret: " "
redis:
enabled: true
< / code > < / pre >
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< p > See the < a href = "usage/configuration/config_documentation.html" > configuration manual< / a >
for the full documentation of each option.< / p >
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< p > Under < strong > no circumstances< / strong > should the replication listener be exposed to the
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public internet; replication traffic is:< / p >
< ul >
< li > always unencrypted< / li >
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< li > unauthenticated, unless < a href = "usage/configuration/config_documentation.html#worker_replication_secret" > < code > worker_replication_secret< / code > < / a >
is configured< / li >
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< / ul >
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< h3 id = "worker-configuration" > < a class = "header" href = "#worker-configuration" > Worker configuration< / a > < / h3 >
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< p > In the config file for each worker, you must specify:< / p >
< ul >
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< li > The type of worker (< a href = "usage/configuration/config_documentation.html#worker_app" > < code > worker_app< / code > < / a > ).
The currently available worker applications are listed < a href = "#available-worker-applications" > below< / a > .< / li >
< li > A unique name for the worker (< a href = "usage/configuration/config_documentation.html#worker_name" > < code > worker_name< / code > < / a > ).< / li >
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< li > The HTTP replication endpoint that it should talk to on the main synapse process
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(< a href = "usage/configuration/config_documentation.html#worker_replication_host" > < code > worker_replication_host< / code > < / a > and
< a href = "usage/configuration/config_documentation.html#worker_replication_http_port" > < code > worker_replication_http_port< / code > < / a > ).< / li >
< li > If handling HTTP requests, a < a href = "usage/configuration/config_documentation.html#worker_listeners" > < code > worker_listeners< / code > < / a > option
with an < code > http< / code > listener.< / li >
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< li > If handling the < code > ^/_matrix/client/v3/keys/upload< / code > endpoint, the HTTP URI for
the main process (< code > worker_main_http_uri< / code > ).< / li >
< / ul >
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< p > For example:< / p >
< pre > < code class = "language-yaml" > worker_app: synapse.app.generic_worker
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worker_name: generic_worker1
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# The replication listener on the main synapse process.
worker_replication_host: 127.0.0.1
worker_replication_http_port: 9093
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worker_main_http_uri: http://localhost:8008/
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worker_listeners:
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- type: http
port: 8083
resources:
- names: [client, federation]
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worker_log_config: /etc/matrix-synapse/generic-worker-log.yaml
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< / code > < / pre >
< p > ...is a full configuration for a generic worker instance, which will expose a
plain HTTP endpoint on port 8083 separately serving various endpoints, e.g.
< code > /sync< / code > , which are listed below.< / p >
< p > Obviously you should configure your reverse-proxy to route the relevant
endpoints to the worker (< code > localhost:8083< / code > in the above example).< / p >
< h3 id = "running-synapse-with-workers" > < a class = "header" href = "#running-synapse-with-workers" > Running Synapse with workers< / a > < / h3 >
< p > Finally, you need to start your worker processes. This can be done with either
< code > synctl< / code > or your distribution's preferred service manager such as < code > systemd< / code > . We
recommend the use of < code > systemd< / code > where available: for information on setting up
< code > systemd< / code > to start synapse workers, see
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< a href = "systemd-with-workers" > Systemd with Workers< / a > . To use < code > synctl< / code > , see
< a href = "synctl_workers.html" > Using synctl with Workers< / a > .< / p >
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< h2 id = "available-worker-applications" > < a class = "header" href = "#available-worker-applications" > Available worker applications< / a > < / h2 >
< h3 id = "synapseappgeneric_worker" > < a class = "header" href = "#synapseappgeneric_worker" > < code > synapse.app.generic_worker< / code > < / a > < / h3 >
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< p > This worker can handle API requests matching the following regular expressions.
These endpoints can be routed to any worker. If a worker is set up to handle a
stream then, for maximum efficiency, additional endpoints should be routed to that
worker: refer to the < a href = "#stream-writers" > stream writers< / a > section below for further
information.< / p >
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< pre > < code > # Sync requests
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^/_matrix/client/(r0|v3)/sync$
^/_matrix/client/(api/v1|r0|v3)/events$
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^/_matrix/client/(api/v1|r0|v3)/initialSync$
^/_matrix/client/(api/v1|r0|v3)/rooms/[^/]+/initialSync$
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# Federation requests
^/_matrix/federation/v1/event/
^/_matrix/federation/v1/state/
^/_matrix/federation/v1/state_ids/
^/_matrix/federation/v1/backfill/
^/_matrix/federation/v1/get_missing_events/
^/_matrix/federation/v1/publicRooms
^/_matrix/federation/v1/query/
^/_matrix/federation/v1/make_join/
^/_matrix/federation/v1/make_leave/
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^/_matrix/federation/(v1|v2)/send_join/
^/_matrix/federation/(v1|v2)/send_leave/
^/_matrix/federation/(v1|v2)/invite/
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^/_matrix/federation/v1/event_auth/
^/_matrix/federation/v1/exchange_third_party_invite/
^/_matrix/federation/v1/user/devices/
^/_matrix/key/v2/query
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^/_matrix/federation/v1/hierarchy/
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# Inbound federation transaction request
^/_matrix/federation/v1/send/
# Client API requests
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^/_matrix/client/(api/v1|r0|v3|unstable)/createRoom$
^/_matrix/client/(api/v1|r0|v3|unstable)/publicRooms$
^/_matrix/client/(api/v1|r0|v3|unstable)/rooms/.*/joined_members$
^/_matrix/client/(api/v1|r0|v3|unstable)/rooms/.*/context/.*$
^/_matrix/client/(api/v1|r0|v3|unstable)/rooms/.*/members$
^/_matrix/client/(api/v1|r0|v3|unstable)/rooms/.*/state$
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^/_matrix/client/v1/rooms/.*/hierarchy$
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^/_matrix/client/(v1|unstable)/rooms/.*/relations/
^/_matrix/client/v1/rooms/.*/threads$
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^/_matrix/client/unstable/org.matrix.msc2716/rooms/.*/batch_send$
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^/_matrix/client/unstable/im.nheko.summary/rooms/.*/summary$
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^/_matrix/client/(r0|v3|unstable)/account/3pid$
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^/_matrix/client/(r0|v3|unstable)/account/whoami$
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^/_matrix/client/(r0|v3|unstable)/devices$
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^/_matrix/client/versions$
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^/_matrix/client/(api/v1|r0|v3|unstable)/voip/turnServer$
^/_matrix/client/(api/v1|r0|v3|unstable)/rooms/.*/event/
^/_matrix/client/(api/v1|r0|v3|unstable)/joined_rooms$
^/_matrix/client/(api/v1|r0|v3|unstable)/search$
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# Encryption requests
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# Note that ^/_matrix/client/(r0|v3|unstable)/keys/upload/ requires `worker_main_http_uri`
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^/_matrix/client/(r0|v3|unstable)/keys/query$
^/_matrix/client/(r0|v3|unstable)/keys/changes$
^/_matrix/client/(r0|v3|unstable)/keys/claim$
^/_matrix/client/(r0|v3|unstable)/room_keys/
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^/_matrix/client/(r0|v3|unstable)/keys/upload/
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# Registration/login requests
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^/_matrix/client/(api/v1|r0|v3|unstable)/login$
^/_matrix/client/(r0|v3|unstable)/register$
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^/_matrix/client/v1/register/m.login.registration_token/validity$
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# Event sending requests
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^/_matrix/client/(api/v1|r0|v3|unstable)/rooms/.*/redact
^/_matrix/client/(api/v1|r0|v3|unstable)/rooms/.*/send
^/_matrix/client/(api/v1|r0|v3|unstable)/rooms/.*/state/
^/_matrix/client/(api/v1|r0|v3|unstable)/rooms/.*/(join|invite|leave|ban|unban|kick)$
^/_matrix/client/(api/v1|r0|v3|unstable)/join/
^/_matrix/client/(api/v1|r0|v3|unstable)/profile/
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# Account data requests
^/_matrix/client/(r0|v3|unstable)/.*/tags
^/_matrix/client/(r0|v3|unstable)/.*/account_data
# Receipts requests
^/_matrix/client/(r0|v3|unstable)/rooms/.*/receipt
^/_matrix/client/(r0|v3|unstable)/rooms/.*/read_markers
# Presence requests
^/_matrix/client/(api/v1|r0|v3|unstable)/presence/
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# User directory search requests
^/_matrix/client/(r0|v3|unstable)/user_directory/search$
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< / code > < / pre >
< p > Additionally, the following REST endpoints can be handled for GET requests:< / p >
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< pre > < code > ^/_matrix/client/(api/v1|r0|v3|unstable)/pushrules/
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< / code > < / pre >
< p > Pagination requests can also be handled, but all requests for a given
room must be routed to the same instance. Additionally, care must be taken to
ensure that the purge history admin API is not used while pagination requests
for the room are in flight:< / p >
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< pre > < code > ^/_matrix/client/(api/v1|r0|v3|unstable)/rooms/.*/messages$
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< / code > < / pre >
< p > Additionally, the following endpoints should be included if Synapse is configured
to use SSO (you only need to include the ones for whichever SSO provider you're
using):< / p >
< pre > < code > # for all SSO providers
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^/_matrix/client/(api/v1|r0|v3|unstable)/login/sso/redirect
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^/_synapse/client/pick_idp$
^/_synapse/client/pick_username
^/_synapse/client/new_user_consent$
^/_synapse/client/sso_register$
# OpenID Connect requests.
^/_synapse/client/oidc/callback$
# SAML requests.
^/_synapse/client/saml2/authn_response$
# CAS requests.
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^/_matrix/client/(api/v1|r0|v3|unstable)/login/cas/ticket$
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< / code > < / pre >
< p > Ensure that all SSO logins go to a single process.
For multiple workers not handling the SSO endpoints properly, see
< a href = "https://github.com/matrix-org/synapse/issues/7530" > #7530< / a > and
< a href = "https://github.com/matrix-org/synapse/issues/9427" > #9427< / a > .< / p >
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< p > Note that a < a href = "usage/configuration/config_documentation.html#listeners" > HTTP listener< / a >
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with < code > client< / code > and < code > federation< / code > < code > resources< / code > must be configured in the
< a href = "usage/configuration/config_documentation.html#worker_listeners" > < code > worker_listeners< / code > < / a >
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option in the worker config.< / p >
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< h4 id = "load-balancing" > < a class = "header" href = "#load-balancing" > Load balancing< / a > < / h4 >
< p > It is possible to run multiple instances of this worker app, with incoming requests
being load-balanced between them by the reverse-proxy. However, different endpoints
have different characteristics and so admins
may wish to run multiple groups of workers handling different endpoints so that
load balancing can be done in different ways.< / p >
< p > For < code > /sync< / code > and < code > /initialSync< / code > requests it will be more efficient if all
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requests from a particular user are routed to a single instance. This can
be done e.g. in nginx via IP < code > hash $http_x_forwarded_for;< / code > or via
< code > hash $http_authorization consistent;< / code > which contains the users access token.< / p >
< p > Admins may additionally wish to separate out < code > /sync< / code >
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requests that have a < code > since< / code > query parameter from those that don't (and
< code > /initialSync< / code > ), as requests that don't are known as " initial sync" that happens
when a user logs in on a new device and can be < em > very< / em > resource intensive, so
isolating these requests will stop them from interfering with other users ongoing
syncs.< / p >
< p > Federation and client requests can be balanced via simple round robin.< / p >
< p > The inbound federation transaction request < code > ^/_matrix/federation/v1/send/< / code >
should be balanced by source IP so that transactions from the same remote server
go to the same process.< / p >
< p > Registration/login requests can be handled separately purely to help ensure that
unexpected load doesn't affect new logins and sign ups.< / p >
< p > Finally, event sending requests can be balanced by the room ID in the URI (or
the full URI, or even just round robin), the room ID is the path component after
< code > /rooms/< / code > . If there is a large bridge connected that is sending or may send lots
of events, then a dedicated set of workers can be provisioned to limit the
effects of bursts of events from that bridge on events sent by normal users.< / p >
< h4 id = "stream-writers" > < a class = "header" href = "#stream-writers" > Stream writers< / a > < / h4 >
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< p > Additionally, the writing of specific streams (such as events) can be moved off
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of the main process to a particular worker.< / p >
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< p > To enable this, the worker must have a
< a href = "usage/configuration/config_documentation.html#listeners" > HTTP < code > replication< / code > listener< / a > configured,
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have a < a href = "usage/configuration/config_documentation.html#worker_name" > < code > worker_name< / code > < / a >
and be listed in the < a href = "usage/configuration/config_documentation.html#instance_map" > < code > instance_map< / code > < / a >
config. The same worker can handle multiple streams, but unless otherwise documented,
each stream can only have a single writer.< / p >
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< p > For example, to move event persistence off to a dedicated worker, the shared
configuration would include:< / p >
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< pre > < code class = "language-yaml" > instance_map:
event_persister1:
host: localhost
port: 8034
stream_writers:
events: event_persister1
< / code > < / pre >
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< p > An example for a stream writer instance:< / p >
< pre > < code class = "language-yaml" > worker_app: synapse.app.generic_worker
worker_name: event_persister1
# The replication listener on the main synapse process.
worker_replication_host: 127.0.0.1
worker_replication_http_port: 9093
worker_listeners:
- type: http
port: 8034
resources:
- names: [replication]
# Enable listener if this stream writer handles endpoints for the `typing` or
# `to_device` streams. Uses a different port to the `replication` listener to
# avoid exposing the `replication` listener publicly.
#
#- type: http
# port: 8035
# resources:
# - names: [client]
worker_log_config: /etc/matrix-synapse/event-persister-log.yaml
< / code > < / pre >
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< p > Some of the streams have associated endpoints which, for maximum efficiency, should
be routed to the workers handling that stream. See below for the currently supported
streams and the endpoints associated with them:< / p >
< h5 id = "the-events-stream" > < a class = "header" href = "#the-events-stream" > The < code > events< / code > stream< / a > < / h5 >
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< p > The < code > events< / code > stream experimentally supports having multiple writer workers, where load
is sharded between them by room ID. Each writer is called an < em > event persister< / em > . They are
responsible for< / p >
< ul >
< li > receiving new events,< / li >
< li > linking them to those already in the room < a href = "development/room-dag-concepts.html" > DAG< / a > ,< / li >
< li > persisting them to the DB, and finally< / li >
< li > updating the events stream.< / li >
< / ul >
< p > Because load is sharded in this way, you < em > must< / em > restart all worker instances when
adding or removing event persisters.< / p >
< p > An < code > event_persister< / code > should not be mistaken for an < code > event_creator< / code > .
An < code > event_creator< / code > listens for requests from clients to create new events and does
so. It will then pass those events over HTTP replication to any configured event
persisters (or the main process if none are configured).< / p >
< p > Note that < code > event_creator< / code > s and < code > event_persister< / code > s are implemented using the same
< a href = "#synapse.app.generic_worker" > < code > synapse.app.generic_worker< / code > < / a > .< / p >
< p > An example < a href = "usage/configuration/config_documentation.html#stream_writers" > < code > stream_writers< / code > < / a >
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configuration with multiple writers:< / p >
< pre > < code class = "language-yaml" > stream_writers:
events:
- event_persister1
- event_persister2
< / code > < / pre >
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< h5 id = "the-typing-stream" > < a class = "header" href = "#the-typing-stream" > The < code > typing< / code > stream< / a > < / h5 >
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< p > The following endpoints should be routed directly to the worker configured as
the stream writer for the < code > typing< / code > stream:< / p >
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< pre > < code > ^/_matrix/client/(api/v1|r0|v3|unstable)/rooms/.*/typing
< / code > < / pre >
< h5 id = "the-to_device-stream" > < a class = "header" href = "#the-to_device-stream" > The < code > to_device< / code > stream< / a > < / h5 >
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< p > The following endpoints should be routed directly to the worker configured as
the stream writer for the < code > to_device< / code > stream:< / p >
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< pre > < code > ^/_matrix/client/(r0|v3|unstable)/sendToDevice/
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< / code > < / pre >
< h5 id = "the-account_data-stream" > < a class = "header" href = "#the-account_data-stream" > The < code > account_data< / code > stream< / a > < / h5 >
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< p > The following endpoints should be routed directly to the worker configured as
the stream writer for the < code > account_data< / code > stream:< / p >
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< pre > < code > ^/_matrix/client/(r0|v3|unstable)/.*/tags
^/_matrix/client/(r0|v3|unstable)/.*/account_data
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< / code > < / pre >
< h5 id = "the-receipts-stream" > < a class = "header" href = "#the-receipts-stream" > The < code > receipts< / code > stream< / a > < / h5 >
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< p > The following endpoints should be routed directly to the worker configured as
the stream writer for the < code > receipts< / code > stream:< / p >
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< pre > < code > ^/_matrix/client/(r0|v3|unstable)/rooms/.*/receipt
^/_matrix/client/(r0|v3|unstable)/rooms/.*/read_markers
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< / code > < / pre >
< h5 id = "the-presence-stream" > < a class = "header" href = "#the-presence-stream" > The < code > presence< / code > stream< / a > < / h5 >
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< p > The following endpoints should be routed directly to the worker configured as
the stream writer for the < code > presence< / code > stream:< / p >
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< pre > < code > ^/_matrix/client/(api/v1|r0|v3|unstable)/presence/
< / code > < / pre >
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< h4 id = "background-tasks" > < a class = "header" href = "#background-tasks" > Background tasks< / a > < / h4 >
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< p > There is also support for moving background tasks to a separate
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worker. Background tasks are run periodically or started via replication. Exactly
which tasks are configured to run depends on your Synapse configuration (e.g. if
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stats is enabled). This worker doesn't handle any REST endpoints itself.< / p >
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< p > To enable this, the worker must have a unique
< a href = "usage/configuration/config_documentation.html#worker_name" > < code > worker_name< / code > < / a >
and can be configured to run background tasks. For example, to move background tasks
to a dedicated worker, the shared configuration would include:< / p >
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< pre > < code class = "language-yaml" > run_background_tasks_on: background_worker
< / code > < / pre >
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< p > You might also wish to investigate the
< a href = "#updating-the-user-directory" > < code > update_user_directory_from_worker< / code > < / a > and
< a href = "#synapseappmedia_repository" > < code > media_instance_running_background_jobs< / code > < / a > settings.< / p >
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< p > An example for a dedicated background worker instance:< / p >
< pre > < code class = "language-yaml" > worker_app: synapse.app.generic_worker
worker_name: background_worker
# The replication listener on the main synapse process.
worker_replication_host: 127.0.0.1
worker_replication_http_port: 9093
worker_log_config: /etc/matrix-synapse/background-worker-log.yaml
< / code > < / pre >
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< h4 id = "updating-the-user-directory" > < a class = "header" href = "#updating-the-user-directory" > Updating the User Directory< / a > < / h4 >
< p > You can designate one generic worker to update the user directory.< / p >
< p > Specify its name in the shared configuration as follows:< / p >
< pre > < code class = "language-yaml" > update_user_directory_from_worker: worker_name
< / code > < / pre >
< p > This work cannot be load-balanced; please ensure the main process is restarted
after setting this option in the shared configuration!< / p >
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< p > User directory updates allow REST endpoints matching the following regular
expressions to work:< / p >
< pre > < code > ^/_matrix/client/(r0|v3|unstable)/user_directory/search$
< / code > < / pre >
< p > The above endpoints can be routed to any worker, though you may choose to route
it to the chosen user directory worker.< / p >
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< p > This style of configuration supersedes the legacy < code > synapse.app.user_dir< / code >
worker application type.< / p >
< h4 id = "notifying-application-services" > < a class = "header" href = "#notifying-application-services" > Notifying Application Services< / a > < / h4 >
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< p > You can designate one generic worker to send output traffic to Application Services.
Doesn't handle any REST endpoints itself, but you should specify its name in the
shared configuration as follows:< / p >
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< pre > < code class = "language-yaml" > notify_appservices_from_worker: worker_name
< / code > < / pre >
< p > This work cannot be load-balanced; please ensure the main process is restarted
after setting this option in the shared configuration!< / p >
< p > This style of configuration supersedes the legacy < code > synapse.app.appservice< / code >
worker application type.< / p >
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< h3 id = "synapseapppusher" > < a class = "header" href = "#synapseapppusher" > < code > synapse.app.pusher< / code > < / a > < / h3 >
< p > Handles sending push notifications to sygnal and email. Doesn't handle any
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REST endpoints itself, but you should set
< a href = "usage/configuration/config_documentation.html#start_pushers" > < code > start_pushers: false< / code > < / a > in the
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shared configuration file to stop the main synapse sending push notifications.< / p >
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< p > To run multiple instances at once the
< a href = "usage/configuration/config_documentation.html#pusher_instances" > < code > pusher_instances< / code > < / a >
option should list all pusher instances by their
< a href = "usage/configuration/config_documentation.html#worker_name" > < code > worker_name< / code > < / a > , e.g.:< / p >
< pre > < code class = "language-yaml" > start_pushers: false
pusher_instances:
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- pusher_worker1
- pusher_worker2
< / code > < / pre >
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< p > An example for a pusher instance:< / p >
< pre > < code class = "language-yaml" > worker_app: synapse.app.pusher
worker_name: pusher_worker1
# The replication listener on the main synapse process.
worker_replication_host: 127.0.0.1
worker_replication_http_port: 9093
worker_log_config: /etc/matrix-synapse/pusher-worker-log.yaml
< / code > < / pre >
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< h3 id = "synapseappappservice" > < a class = "header" href = "#synapseappappservice" > < code > synapse.app.appservice< / code > < / a > < / h3 >
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< p > < strong > Deprecated as of Synapse v1.59.< / strong > < a href = "#notifying-application-services" > Use < code > synapse.app.generic_worker< / code > with the
< code > notify_appservices_from_worker< / code > option instead.< / a > < / p >
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< p > Handles sending output traffic to Application Services. Doesn't handle any
REST endpoints itself, but you should set < code > notify_appservices: False< / code > in the
shared configuration file to stop the main synapse sending appservice notifications.< / p >
< p > Note this worker cannot be load-balanced: only one instance should be active.< / p >
< h3 id = "synapseappfederation_sender" > < a class = "header" href = "#synapseappfederation_sender" > < code > synapse.app.federation_sender< / code > < / a > < / h3 >
< p > Handles sending federation traffic to other servers. Doesn't handle any
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REST endpoints itself, but you should set
< a href = "usage/configuration/config_documentation.html#send_federation" > < code > send_federation: false< / code > < / a >
in the shared configuration file to stop the main synapse sending this traffic.< / p >
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< p > If running multiple federation senders then you must list each
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instance in the
< a href = "usage/configuration/config_documentation.html#federation_sender_instances" > < code > federation_sender_instances< / code > < / a >
option by their
< a href = "usage/configuration/config_documentation.html#worker_name" > < code > worker_name< / code > < / a > .
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All instances must be stopped and started when adding or removing instances.
For example:< / p >
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< pre > < code class = "language-yaml" > send_federation: false
federation_sender_instances:
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- federation_sender1
- federation_sender2
< / code > < / pre >
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< p > An example for a federation sender instance:< / p >
< pre > < code class = "language-yaml" > worker_app: synapse.app.federation_sender
worker_name: federation_sender1
# The replication listener on the main synapse process.
worker_replication_host: 127.0.0.1
worker_replication_http_port: 9093
worker_log_config: /etc/matrix-synapse/federation-sender-log.yaml
< / code > < / pre >
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< h3 id = "synapseappmedia_repository" > < a class = "header" href = "#synapseappmedia_repository" > < code > synapse.app.media_repository< / code > < / a > < / h3 >
< p > Handles the media repository. It can handle all endpoints starting with:< / p >
< pre > < code > /_matrix/media/
< / code > < / pre >
< p > ... and the following regular expressions matching media-specific administration APIs:< / p >
< pre > < code > ^/_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/.*$
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^/_synapse/admin/v1/users/.*/media$
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< / code > < / pre >
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< p > You should also set
< a href = "usage/configuration/config_documentation.html#enable_media_repo" > < code > enable_media_repo: False< / code > < / a >
in the shared configuration
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file to stop the main synapse running background jobs related to managing the
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media repository. Note that doing so will prevent the main process from being
able to handle the above endpoints.< / p >
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< p > In the < code > media_repository< / code > worker configuration file, configure the
< a href = "usage/configuration/config_documentation.html#listeners" > HTTP listener< / a > to
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expose the < code > media< / code > resource. For example:< / p >
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< pre > < code class = "language-yaml" > worker_app: synapse.app.media_repository
worker_name: media_worker
# The replication listener on the main synapse process.
worker_replication_host: 127.0.0.1
worker_replication_http_port: 9093
worker_listeners:
- type: http
port: 8085
resources:
- names: [media]
worker_log_config: /etc/matrix-synapse/media-worker-log.yaml
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< / code > < / pre >
< p > Note that if running multiple media repositories they must be on the same server
and you must configure a single instance to run the background tasks, e.g.:< / p >
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< pre > < code class = "language-yaml" > media_instance_running_background_jobs: " media-repository-1"
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< / code > < / pre >
< p > Note that if a reverse proxy is used , then < code > /_matrix/media/< / code > must be routed for both inbound client and federation requests (if they are handled separately).< / p >
< h3 id = "synapseappuser_dir" > < a class = "header" href = "#synapseappuser_dir" > < code > synapse.app.user_dir< / code > < / a > < / h3 >
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< p > < strong > Deprecated as of Synapse v1.59.< / strong > < a href = "#updating-the-user-directory" > Use < code > synapse.app.generic_worker< / code > with the
< code > update_user_directory_from_worker< / code > option instead.< / a > < / p >
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< p > Handles searches in the user directory. It can handle REST endpoints matching
the following regular expressions:< / p >
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< pre > < code > ^/_matrix/client/(r0|v3|unstable)/user_directory/search$
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< / code > < / pre >
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< p > When using this worker you must also set < code > update_user_directory: false< / code > in the
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shared configuration file to stop the main synapse running background
jobs related to updating the user directory.< / p >
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< p > Above endpoint is not < em > required< / em > to be routed to this worker. By default,
< code > update_user_directory< / code > is set to < code > true< / code > , which means the main process
will handle updates. All workers configured with < code > client< / code > can handle the above
endpoint as long as either this worker or the main process are configured to
handle it, and are online.< / p >
< p > If < code > update_user_directory< / code > is set to < code > false< / code > , and this worker is not running,
the above endpoint may give outdated results.< / p >
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< h3 id = "historical-apps" > < a class = "header" href = "#historical-apps" > Historical apps< / a > < / h3 >
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< p > The following used to be separate worker application types, but are now
equivalent to < code > synapse.app.generic_worker< / code > :< / p >
< ul >
< li > < code > synapse.app.client_reader< / code > < / li >
< li > < code > synapse.app.event_creator< / code > < / li >
< li > < code > synapse.app.federation_reader< / code > < / li >
< li > < code > synapse.app.frontend_proxy< / code > < / li >
< li > < code > synapse.app.synchrotron< / code > < / li >
< / ul >
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< h2 id = "migration-from-old-config" > < a class = "header" href = "#migration-from-old-config" > Migration from old config< / a > < / h2 >
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< p > A main change that has occurred is the merging of worker apps into
< code > synapse.app.generic_worker< / code > . This change is backwards compatible and so no
changes to the config are required.< / p >
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< p > To migrate apps to use < code > synapse.app.generic_worker< / code > simply update the
< code > worker_app< / code > option in the worker configs, and where worker are started (e.g.
in systemd service files, but not required for synctl).< / p >
< h2 id = "architectural-diagram" > < a class = "header" href = "#architectural-diagram" > Architectural diagram< / a > < / h2 >
< p > The following shows an example setup using Redis and a reverse proxy:< / p >
< pre > < code > Clients & Federation
|
v
+-----------+
| |
| Reverse |
| Proxy |
| |
+-----------+
| | |
| | | HTTP requests
+-------------------+ | +-----------+
| +---+ |
| | |
v v v
+--------------+ +--------------+ +--------------+ +--------------+
| Main | | Generic | | Generic | | Event |
| Process | | Worker 1 | | Worker 2 | | Persister |
+--------------+ +--------------+ +--------------+ +--------------+
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^ ^ | ^ | | ^ | | ^ ^
| | | | | | | | | | |
| | | | | HTTP | | | | | |
| +----------+< --|---|---------+< --|---|---------+ | |
| | +-------------|--> +-------------+ |
| | | |
| | | |
v v v v
======================================================================
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Redis pub/sub channel
< / code > < / pre >
< / main >
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