Update worker docs to update preferred settings for pusher and federation_sender (#14493)
* Fix one typo on line 3700(and apparently do something to other lines, no idea) * Update config_documentation.md with more information about how federation_senders and pushers settings can be handled. Specifically, that the instance map style of config does not require the special other variables that enable and disable functionality and that a single worker CAN be added to the map not only just two or more. * Extra line here for consistency and appearance. * Add link to sygnal repo. * Add deprecation notice to workers.md and point to the newer alternative method of defining this functionality. * Changelog * Correct version number of Synapse the deprecation is happening in. * Update quiet deprecation with simple notice and suggestion.pull/14600/head
realtyem
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Update worker settings for `pusher` and `federation_sender` functionality.
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@ -3684,7 +3684,7 @@ As a result, the worker configuration is divided into two parts.
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1. The first part (in this section of the manual) defines which shardable tasks
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are delegated to privileged workers. This allows unprivileged workers to make
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request a privileged worker to act on their behalf.
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requests to a privileged worker to act on their behalf.
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1. [The second part](#individual-worker-configuration)
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controls the behaviour of individual workers in isolation.
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@ -3706,6 +3706,8 @@ worker_replication_secret: "secret_secret"
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---
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### `start_pushers`
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Unnecessary to set if using [`pusher_instances`](#pusher_instances) with [`generic_workers`](../../workers.md#synapseappgeneric_worker).
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Controls sending of push notifications on the main process. Set to `false`
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if using a [pusher worker](../../workers.md#synapseapppusher). Defaults to `true`.
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@ -3716,25 +3718,30 @@ start_pushers: false
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---
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### `pusher_instances`
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It is possible to run multiple [pusher workers](../../workers.md#synapseapppusher),
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in which case the work is balanced across them. Use this setting to list the pushers by
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[`worker_name`](#worker_name). Ensure the main process and all pusher workers are
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restarted after changing this option.
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It is possible to scale the processes that handle sending push notifications to [sygnal](https://github.com/matrix-org/sygnal)
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and email by running a [`generic_worker`](../../workers.md#synapseappgeneric_worker) and adding it's [`worker_name`](#worker_name) to
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a `pusher_instances` map. Doing so will remove handling of this function from the main
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process. Multiple workers can be added to this map, in which case the work is balanced
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across them. Ensure the main process and all pusher workers are restarted after changing
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this option.
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If no or only one pusher worker is configured, this setting is not necessary.
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The main process will send out push notifications by default if you do not disable
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it by setting [`start_pushers: false`](#start_pushers).
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Example configuration:
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Example configuration for a single worker:
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```yaml
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pusher_instances:
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- pusher_worker1
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```
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And for multiple workers:
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```yaml
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start_pushers: false
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pusher_instances:
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- pusher_worker1
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- pusher_worker2
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```
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---
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### `send_federation`
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Unnecessary to set if using [`federation_sender_instances`](#federation_sender_instances) with [`generic_workers`](../../workers.md#synapseappgeneric_worker).
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Controls sending of outbound federation transactions on the main process.
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Set to `false` if using a [federation sender worker](../../workers.md#synapseappfederation_sender).
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Defaults to `true`.
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@ -3746,21 +3753,28 @@ send_federation: false
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---
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### `federation_sender_instances`
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It is possible to run multiple
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[federation sender worker](../../workers.md#synapseappfederation_sender), in which
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case the work is balanced across them. Use this setting to list the senders.
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It is possible to scale the processes that handle sending outbound federation requests
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by running a [`generic_worker`](../../workers.md#synapseappgeneric_worker) and adding it's [`worker_name`](#worker_name) to
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a `federation_sender_instances` map. Doing so will remove handling of this function from
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the main process. Multiple workers can be added to this map, in which case the work is
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balanced across them.
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This configuration setting must be shared between all federation sender workers, and if
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changed all federation sender workers must be stopped at the same time and then
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started, to ensure that all instances are running with the same config (otherwise
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This configuration setting must be shared between all workers handling federation
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sending, and if changed all federation sender workers must be stopped at the same time
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and then started, to ensure that all instances are running with the same config (otherwise
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events may be dropped).
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Example configuration:
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Example configuration for a single worker:
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```yaml
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send_federation: false
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federation_sender_instances:
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- federation_sender1
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```
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And for multiple workers:
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```yaml
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federation_sender_instances:
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- federation_sender1
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- federation_sender2
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```
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---
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### `instance_map`
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@ -3988,4 +4002,3 @@ background_updates:
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min_batch_size: 10
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default_batch_size: 50
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```
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@ -505,6 +505,9 @@ worker application type.
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### `synapse.app.pusher`
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It is likely this option will be deprecated in the future and is not recommended for new
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installations. Instead, [use `synapse.app.generic_worker` with the `pusher_instances`](usage/configuration/config_documentation.md#pusher_instances).
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Handles sending push notifications to sygnal and email. Doesn't handle any
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REST endpoints itself, but you should set
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[`start_pushers: false`](usage/configuration/config_documentation.md#start_pushers) in the
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@ -543,6 +546,9 @@ Note this worker cannot be load-balanced: only one instance should be active.
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### `synapse.app.federation_sender`
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It is likely this option will be deprecated in the future and not recommended for
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new installations. Instead, [use `synapse.app.generic_worker` with the `federation_sender_instances`](usage/configuration/config_documentation.md#federation_sender_instances).
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Handles sending federation traffic to other servers. Doesn't handle any
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REST endpoints itself, but you should set
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[`send_federation: false`](usage/configuration/config_documentation.md#send_federation)
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@ -639,7 +645,9 @@ equivalent to `synapse.app.generic_worker`:
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* `synapse.app.client_reader`
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* `synapse.app.event_creator`
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* `synapse.app.federation_reader`
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* `synapse.app.federation_sender`
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* `synapse.app.frontend_proxy`
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* `synapse.app.pusher`
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* `synapse.app.synchrotron`
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