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Update docs/configuring-playbook-alertmanager-receiver.md: adopt common docs structure

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This commit adopts common structure of descriptions on mjolnir and draupnir docs.

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>
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Suguru Hirahara 2024-12-13 03:24:29 +09:00
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docs/configuring-playbook-alertmanager-receiver.md
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@ -4,23 +4,50 @@ The playbook can install and configure the [matrix-alertmanager-receiver](https:
See the project's [documentation](https://github.com/metio/matrix-alertmanager-receiver/blob/main/README.md) to learn what it does and why it might be useful to you.
At the moment, **setting up this service's bot requires some manual actions** as described below in [Account and room preparation](#account-and-room-preparation).
This service is meant to be used with an external [Alertmanager](https://prometheus.io/docs/alerting/latest/alertmanager/) instance. It's **not** meant to be integrated with the [Prometheus & Grafana stack](./configuring-playbook-prometheus-grafana.md) installed by this playbook, because the Alertmanager component is not installed by it.
## Prerequisites
### Register the bot account
This service uses a bot (with a username specified in `matrix_alertmanager_receiver_config_matrix_user_id_localpart`) for delivering messages.
The playbook does not automatically create users for you. You **need to register the bot user manually** before setting up the bot.
Choose a strong password for the bot. You can generate a good password with a command like this: `pwgen -s 64 1`.
You can use the playbook to [register a new user](registering-users.md):
```sh
ansible-playbook -i inventory/hosts setup.yml --extra-vars='username=bot.alertmanager.receiver password=PASSWORD_FOR_THE_BOT admin=no' --tags=register-user
```
### Get an access token
The bot requires an access token to be able to connect to your homeserver. Refer to the documentation on [how to obtain an access token](obtaining-access-tokens.md).
### Join to rooms as the bot manually
ℹ️ **This bot does not accept room invitations automatically**. To deliver messages to rooms, the bot must be joined to all rooms manually.
For each new room you would like the bot to deliver alerts to, invite the bot to the room.
Then, log in as the bot using any Matrix client of your choosing, accept the room invitation from the bot's account, and log out.
You may optionally adjust `matrix_alertmanager_receiver_config_matrix_room_mapping` to create a mapping between the new room and its ID. It provides cleaner `/alert/` URLs.
## Adjusting the playbook configuration
To enable matrix-alertmanager-receiver, add the following configuration to your `inventory/host_vars/matrix.example.com/vars.yml` file:
Add the following configuration to your `inventory/host_vars/matrix.example.com/vars.yml` file. Make sure to replace `ACCESS_TOKEN_HERE` with the one created [above](#get-an-access-token).
```yaml
matrix_alertmanager_receiver_enabled: true
# If you'd like to change the username for this bot, uncomment and adjust. Otherwise, remove.
# Uncomment and adjust this part if you'd like to use a username different than the default
# matrix_alertmanager_receiver_config_matrix_user_id_localpart: "bot.alertmanager.receiver"
# Specify the bot user's access token here.
# See the "Account and room preparation" section below.
matrix_alertmanager_receiver_config_matrix_access_token: ''
matrix_alertmanager_receiver_config_matrix_access_token: "ACCESS_TOKEN_HERE"
# Optionally, configure some mappings (URL-friendly room name -> actual Matrix room ID).
#
@ -57,25 +84,9 @@ See [Configuring DNS](configuring-dns.md) for details about DNS changes.
If you've decided to use the default hostname, you won't need to do any extra DNS configuration.
## Account and room preparation
The playbook can automatically create users, but it cannot automatically obtain access tokens, nor perform any of the other manual actions below.
`matrix-alertmanager-receiver` uses a bot (with a username specified in `matrix_alertmanager_receiver_config_matrix_user_id_localpart` - see above) for delivering messages. You need to **manually register this bot acccount and obtain an access token for it**.
1. [Register a new user](registering-users.md): `ansible-playbook -i inventory/hosts setup.yml --extra-vars='username=bot.alertmanager.receiver password=PASSWORD_FOR_THE_BOT admin=no' --tags=register-user`
2. [Obtain an access token](obtaining-access-tokens.md) for the bot's user account
3. Invite the bot to a room where you'd like to alerts to be delivered
4. Log in as the bot using any Matrix client of your choosing, accept the room invitation from the bot's account and log out
5. (Optionally) Adjust `matrix_alertmanager_receiver_config_matrix_room_mapping` to create a mapping between the new room and its ID
Steps 1 and 2 above only need to be done once, while preparing your [configuration](#adjusting-the-playbook-configuration).
Steps 3 and 4 need to be done for each new room you'd like the bot to deliver alerts to. Step 5 is optional and provides cleaner `/alert/` URLs.
## Installing
Now that you've [prepared the bot account and room](#account-and-room-preparation), [configured the playbook](#adjusting-the-playbook-configuration), and potentially [adjusted your DNS records](#adjusting-dns-records), you can run the playbook with [playbook tags](playbook-tags.md) as below:
After configuring the playbook and potentially [adjusting your DNS records](#adjusting-dns-records), run the playbook with [playbook tags](playbook-tags.md) as below:
<!-- NOTE: let this conservative command run (instead of install-all) to make it clear that failure of the command means something is clearly broken. -->
```sh
@ -111,6 +122,4 @@ route:
- receiver: matrix
```
.. where `URL_HERE` looks like `https://matrix.example.com/matrix-alertmanager-receiver-RANDOM_VALUE_HERE/alert/some-room-name` or `https://matrix.example.com/matrix-alertmanager-receiver-RANDOM_VALUE_HERE/alert/!qporfwt:example.com`.
This bot does **not** accept room invitations automatically (like many other bots do). To deliver messages to rooms, **the bot must be joined to all rooms manually** - see Step 4 of the [Account and room preparation](#account-and-room-preparation) section.
where `URL_HERE` looks like `https://matrix.example.com/matrix-alertmanager-receiver-RANDOM_VALUE_HERE/alert/some-room-name` or `https://matrix.example.com/matrix-alertmanager-receiver-RANDOM_VALUE_HERE/alert/!qporfwt:example.com`.