Document Conduit installation

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/2076

docs/configuring-playbook-conduit.md

@@ -0,0 +1,58 @@
+# Configuring Conduit (optional)
+
+By default, this playbook configures the [Synapse](https://github.com/matrix-org/synapse) Matrix server, but you can also use [Conduit](https://conduit.rs).
+
+**NOTES**:
+
+- **You can't switch an existing Matrix server's implementation** (e.g. Synapse -> Conduit). Proceed below only if you're OK with losing data or you're dealing with a server on a new domain name, which hasn't participated in the Matrix federation yet.
+
+- **homeserver implementations other than Synapse may not be fully functional**. The playbook may also not assist you in an optimal way (like it does with Synapse). Make yourself familiar with the downsides before proceeding
+
+
+## Installation
+
+To use Conduit, you **generally** need the following additional `vars.yml` configuration:
+
+```yaml
+matrix_homeserver_implementation: conduit
+```
+
+However, since Conduit is difficult (see [famedly/conduit#276](https://gitlab.com/famedly/conduit/-/issues/276) and [famedly/conduit#354](https://gitlab.com/famedly/conduit/-/merge_requests/354)) when it comes to creating the first user account and does not support [registering users](registering-users.md) (via the command line or via the playbook) like Synapse and Dendrite do, we recommend the following flow:
+
+1. Add `matrix_conduit_allow_registration: true` to your `vars.yml` the first time around, temporarily
+2. Run the playbook (`ansible-playbook -i inventory/hosts setup.yml --tags=setup-all,start` - see [Installing](installing.md))
+3. Create your first user via Element or any other client which supports creating users
+4. Get rid of `matrix_conduit_allow_registration: true` from your `vars.yml`
+5. Run the playbook again (`ansible-playbook -i inventory/hosts setup.yml --tags=setup-conduit,start` would be enough this time)
+6. You can now use your server safely. Additional users can be created by messaging the internal Conduit bot
+
+
+## Configuring bridges / appservices
+
+Automatic appservice setup is currently unsupported when using conduit. After setting up the service as usual you may notice that it is unable to start.
+
+You will have to manually register appservices using the the [register-appservice](https://gitlab.com/famedly/conduit/-/blob/next/APPSERVICES.md) command.
+
+Find the `registration.yaml` in the `/matrix` directory, for example `/matrix/mautrix-signal/bridge/registration.yaml`, then pass the content to conduit:
+
+
+    @conduit:your.server.name: register-appservice
+    ```
+    as_token: <token>
+    de.sorunome.msc2409.push_ephemeral: true
+    hs_token: <token>
+    id: signal
+    namespaces:
+      aliases:
+      - exclusive: true
+        regex: ^#signal_.+:example\.org$
+      users:
+      - exclusive: true
+        regex: ^@signal_.+:example\.org$
+      - exclusive: true
+        regex: ^@signalbot:example\.org$
+    rate_limited: false
+    sender_localpart: _bot_signalbot
+    url: http://matrix-mautrix-signal:29328
+    ```
+

docs/configuring-playbook.md

@@ -42,7 +42,10 @@ When you're done with all the configuration you'd like to do, continue with [Ins
 
 ### Core service adjustments
 
-- [Configuring Synapse](configuring-playbook-synapse.md) (optional)
+- Homeserver configuration:
+  - [Configuring Synapse](configuring-playbook-synapse.md), if you're going with the default/recommended homeserver implementation (optional)
+
+  - [Configuring Conduit](configuring-playbook-conduit.md), if you've switched to the [Conduit](https://conduit.rs) homeserver implementation (optional)
 
 - [Configuring Element](configuring-playbook-client-element.md) (optional)
 

examples/vars.yml

@@ -12,7 +12,9 @@
 matrix_domain: YOUR_BARE_DOMAIN_NAME_HERE
 
 # The Matrix homeserver software to install.
-# See `roles/matrix-base/defaults/main.yml` for valid options.
+# See:
+#  - `roles/matrix-base/defaults/main.yml` for valid options
+# - the `docs/configuring-playbook-IMPLEMENTATION_NAME.md` documentation page, if one is available for your implementation choice
 matrix_homeserver_implementation: synapse
 
 # A secret used as a base, for generating various other secrets.