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1da3531a3d
Added an example for configuring the variables for the OpenID, that might fails because the variables are not defined for the playbook parsing, but Synapse's own config file parsing.
77 lines
5.0 KiB
Markdown
77 lines
5.0 KiB
Markdown
# Configuring Synapse (optional)
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By default, this playbook configures the [Synapse](https://github.com/matrix-org/synapse) Matrix server, so that it works for the general case.
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If that's enough for you, you can skip this document.
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The playbook provides lots of customization variables you could use to change Synapse's settings.
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Their defaults are defined in [`roles/matrix-synapse/defaults/main.yml`](../roles/matrix-synapse/defaults/main.yml) and they ultimately end up in the generated `/matrix/synapse/config/homeserver.yaml` file (on the server). This file is generated from the [`roles/matrix-synapse/templates/synapse/homeserver.yaml.j2`](../roles/matrix-synapse/templates/synapse/homeserver.yaml.j2) template.
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**If there's an existing variable** which controls a setting you wish to change, you can simply define that variable in your configuration file (`inventory/host_vars/matrix.<your-domain>/vars.yml`) and [re-run the playbook](installing.md) to apply the changes.
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Alternatively, **if there is no pre-defined variable** for a Synapse setting you wish to change:
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- you can either **request a variable to be created** (or you can submit such a contribution yourself). Keep in mind that it's **probably not a good idea** to create variables for each one of Synapse's various settings that rarely get used.
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- or, you can **extend and override the default configuration** ([`homeserver.yaml.j2`](../roles/matrix-synapse/templates/synapse/homeserver.yaml.j2)) by making use of the `matrix_synapse_configuration_extension_yaml` variable. You can find information about this in [`roles/matrix-synapse/defaults/main.yml`](../roles/matrix-synapse/defaults/main.yml).
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- or, if extending the configuration is still not powerful enough for your needs, you can **override the configuration completely** using `matrix_synapse_configuration` (or `matrix_synapse_configuration_yaml`). You can find information about this in [`roles/matrix-synapse/defaults/main.yml`](../roles/matrix-synapse/defaults/main.yml).
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## Load balancing with workers
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To have Synapse gracefully handle thousands of users, worker support should be enabled. It factors out some homeserver tasks and spreads the load of incoming client and server-to-server traffic between multiple processes. More information can be found in the [official Synapse workers documentation](https://github.com/matrix-org/synapse/blob/master/docs/workers.md).
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To enable Synapse worker support, update your `inventory/host_vars/matrix.DOMAIN/vars.yml` file:
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```yaml
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matrix_synapse_workers_enabled: true
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```
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We support a few configuration presets (`matrix_synapse_workers_preset: one-of-each` being the default configuration):
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- `little-federation-helper` - a very minimal worker configuration to improve federation performance
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- `one-of-each` - one worker of each supported type
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If you'd like more customization power, you can start with one of the presets and tweak various `matrix_synapse_workers_*_count` variables manually.
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If you increase worker counts too much, you may need to increase the maximum number of Postgres connections too (example):
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```yaml
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matrix_postgres_process_extra_arguments: [
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"-c 'max_connections=200'"
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]
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```
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If you're using the default setup (the `matrix-nginx-proxy` webserver being enabled) or you're using your own `nginx` server (which imports the configuration files generated by the playbook), you're good to go. If you use some other webserver, you may need to tweak your reverse-proxy setup manually to forward traffic to the various workers.
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In case any problems occur, make sure to have a look at the [list of synapse issues about workers](https://github.com/matrix-org/synapse/issues?q=workers+in%3Atitle) and your `journalctl --unit 'matrix-*'`.
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## Synapse Admin
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Certain Synapse administration tasks (managing users and rooms, etc.) can be performed via a web user-interace, if you install [Synapse Admin](configuring-playbook-synapse-admin.md).
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## Synapse + OpenID Connect for Single-Sign-On
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If you'd like to use OpenID Connect authentication with Synapse, you'll need some additional reverse-proxy configuration (see [our nginx reverse-proxy doc page](configuring-playbook-nginx.md#synapse-openid-connect-for-single-sign-on)).
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In case you encounter errors regarding the parsing of the variables, you can try to add `{%raw}` and `{% endraw %}` blocks around them. For example ;
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```
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- idp_id: keycloak
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idp_name: "Keycloak"
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issuer: "https://url.ix/auth/realms/x"
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client_id: "matrix"
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client_secret: "{{ vault_synapse_keycloak }}"
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scopes: ["openid", "profile"]
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authorization_endpoint: "https://url.ix/auth/realms/x/protocol/openid-connect/auth"
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token_endpoint: "https://url.ix/auth/realms/x/protocol/openid-connect/token"
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userinfo_endpoint: "https://url.ix/auth/realms/x/protocol/openid-connect/userinfo"
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user_mapping_provider:
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config:
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display_name_template: "{%raw}{{ user.given_name }}{% endraw %} {%raw}{{ user.family_name }}{% endraw %}"
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email_template: "{%raw}{{ user.email }}{% endraw %}"
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```
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