Write some docs

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# Setting up Mjolnir (optional)
The playbook can install and configure [Mjolnir](https://github.com/matrix-org/mjolnir) for you.
Mjolnir is a moderation tool for Matrix.
The playbook can install and configure the [Mjolnir](https://github.com/matrix-org/mjolnir) moderation bot for you.
See the project's [documentation](https://github.com/matrix-org/mjolnir) to learn what it does and why it might be useful to you.
Note: the playbook does not currently support the Mjolnir Synapse module. The playbook does support another antispam module, see [Setting up Synapse Simple Antispam](docs/configuring-playbook-synapse-simple-antispam.md).
## Registering the bot user
The playbook does not automatically create users for you. The bot requires at least 1 access token to be able to connect to your homeserver.
## 1. Registering the bot user
The playbook does not automatically create users for you. The bot requires an access token to be able to connect to your homeserver.
You **need to register the bot user manually** before setting up the bot.
@ -21,8 +21,7 @@ You can use the playbook to [register a new user](registering-users.md):
ansible-playbook -i inventory/hosts setup.yml --extra-vars='username=bot.mjolnir password=PASSWORD_FOR_THE_BOT admin=no' --tags=register-user
```
## Getting an access token
## 2. Get an access token
If you use curl, you can get an access token like this:
@ -34,29 +33,60 @@ curl -X POST --header 'Content-Type: application/json' -d '{
}' 'https://matrix.YOURDOMAIN/_matrix/client/r0/login'
```
Alternatively, you can use a full-featured client (such as Element) to log in and get the access token from there (note: don't log out from the client as that will invalidate the token), but doing so might lead to decryption problems. That warning comes from [here](https://github.com/matrix-org/go-neb#quick-start).
Alternatively, you can use a full-featured client (such as Element) to log in and get the access token from there (note: don't log out from the client as that will invalidate the token).
## Make sure account is free from rate limiting
## 3. Make sure the account is free from rate limiting
TODO
You will need to prevent Synapse from rate limiting the bot's account is not rate limited by Synapse. This is not an optional step. If you do not do this step mjolnir will crash. [Currently there is no Synapse config option for this](https://github.com/matrix-org/synapse/issues/6286) so you have to manually edit the Synapse database. Manually editing the Synapse database is rarely a good idea but in this case it is required. Please ask for help if you are uncomfortable with these steps.
1. Copy the statement below into a text editor.
```
INSERT INTO ratelimit_override VALUES ("@bot.mjolnir:DOMAIN", 0, 0);
```
1. Change the username (`@bot.mjolnir:DOMAIN`) to the username you used when you registered the bot's account. You must change `DOMAIN` to your server's domain.
1. Get a database terminal by following these steps: [docs/maintenance-postgres.md#getting-a-database-terminal](docs/maintenance-postgres.md#getting-a-database-terminal)
1. Connect to Synapse's database by typing `\connect synapse` into the database terminal
1. Paste in the `INSERT INTO` command that you edited and press enter.
You can run `SELECT * FROM ratelimit_override;` to see if it worked. If the output looks like this:
```
insert into ratelimit_override values ("@bot.mjolnir:DOMAIN", 0, 0);
user_id | messages_per_second | burst_count
-----------------------+---------------------+-------------
@bot.mjolnir:raim.ist | 0 | 0`
```
then you did it correctly.
## Adjusting the playbook configuration
## 5. Create a management room
Using your own account, create a new room that you will use to manage the bot. This is the room where you will see the status of the bot and where you will send commands to the bot, such as the command to ban a user from another room.
Once you have created the room you need to copy the room ID so you can tell the bot to use that room. In Element you can do this by going to the room's settings, clicking Advanced, and then coping the internal room ID. The room ID will look something like `!QvgVuKq0ha8glOLGMG:DOMAIN`.
## 4. Adjusting the playbook configuration
Add the following configuration to your `inventory/host_vars/matrix.DOMAIN/vars.yml` file (adapt to your needs):
You must replace `ACCESS_TOKEN_FROM_STEP_2_GOES_HERE` and `ROOM_ID_FROM_STEP_5_GOES_HERE` with the your own values.
```yaml
TODO
matrix_bot_mjolnir_enabled: true
matrix_bot_mjolnir_access_token: "ACCESS_TOKEN_FROM_STEP_2_GOES_HERE"
matrix_bot_mjolnir_management_room: "ROOM_ID_FROM_STEP_5_GOES_HERE"
```
## Installing
## 5. Installing
After configuring the playbook, run the [installation](installing.md) command again:
After configuring the playbook, run the [installation](installing.md) command:
```
ansible-playbook -i inventory/hosts setup.yml --tags=setup-all,start
@ -65,6 +95,20 @@ ansible-playbook -i inventory/hosts setup.yml --tags=setup-all,start
## Usage
TODO
You can refer to the upstream [documentation](https://github.com/matrix-org/mjolnir) for additional ways to use and configure mjolnir. Check out their [quickstart guide](https://github.com/matrix-org/mjolnir#quickstart-guide) for some basic commands you can give to the bot.
You can also refer to the upstream [documentation](https://github.com/matrix-org/mjolnir).
You can configure additional options by adding the `matrix_bot_mjolnir_configuration_extension_yaml` variable to your `inventory/host_vars/matrix.DOMAIN/vars.yml` file.
For example to change mjolnir's `recordIgnoredInvites` option to `true` you would add the following to your `vars.yml` file.
```yaml
matrix_bot_mjolnir_configuration_extension_yaml: |
# Your custom YAML configuration goes here.
# This configuration extends the default starting configuration (`matrix_bot_mjolnir_configuration_yaml`).
#
# You can override individual variables from the default configuration, or introduce new ones.
#
# If you need something more special, you can take full control by
# completely redefining `matrix_bot_mjolnir_configuration_yaml`.
recordIgnoredInvites: true
```

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@ -85,6 +85,8 @@ When you're done with all the configuration you'd like to do, continue with [Ins
- [Setting up Matrix Corporal](configuring-playbook-matrix-corporal.md) (optional, advanced)
- [Setting up Mjolnir](configuring-playbook-bot-mjolnir) (optional, advanced)
### Bridging other networks