matrix-docker-ansible-deploy/docs/configuring-playbook-client-hydrogen.md
Suguru Hirahara e8548e0016
Mention how much "just install-all" is faster than "just setup-all"
This way, the "installing" sections would cover from beginners to advanced (professional) readers.

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>
2024-12-02 20:00:58 +09:00

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# Setting up Hydrogen (optional)
This playbook can install the [Hydrogen](https://github.com/element-hq/hydrogen-web) Matrix web client for you.
Hydrogen is a lightweight web client that supports mobile and legacy web browsers. It can be installed alongside or instead of Element Web.
## Adjusting the playbook configuration
To enable Hydrogen, add the following configuration to your `inventory/host_vars/matrix.example.com/vars.yml` file:
```yaml
matrix_client_hydrogen_enabled: true
```
### Adjusting the Hydrogen URL
By default, this playbook installs Hydrogen on the `hydrogen.` subdomain (`hydrogen.example.com`) and requires you to [adjust your DNS records](#adjusting-dns-records).
By tweaking the `matrix_client_hydrogen_hostname` and `matrix_client_hydrogen_path_prefix` variables, you can easily make the service available at a **different hostname and/or path** than the default one.
Example additional configuration for your `inventory/host_vars/matrix.example.com/vars.yml` file:
```yaml
# Switch to the domain used for Matrix services (`matrix.example.com`),
# so we won't need to add additional DNS records for Hydrogen.
matrix_client_hydrogen_hostname: "{{ matrix_server_fqn_matrix }}"
# Expose under the /hydrogen subpath
matrix_client_hydrogen_path_prefix: /hydrogen
```
## Adjusting DNS records
Once you've decided on the domain and path, **you may need to adjust your DNS** records to point the Hydrogen domain to the Matrix server.
By default, you will need to create a CNAME record for `hydrogen`. See [Configuring DNS](configuring-dns.md) for details about DNS changes.
If you've decided to reuse the `matrix.` domain, you won't need to do any extra DNS configuration.
## Installing
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
ansible-playbook -i inventory/hosts setup.yml --tags=setup-all,start
```
The shortcut commands with the [`just` program](just.md) are also available: `just install-all` or `just setup-all`
`just install-all` is useful for maintaining your setup quickly ([2x-5x faster](../CHANGELOG.md#2x-5x-performance-improvements-in-playbook-runtime) than `just setup-all`) when its components remain unchanged. If you adjust your `vars.yml` to remove other components, you'd need to run `just setup-all`, or these components will still remain installed. Note these shortcuts run the `ensure-matrix-users-created` tag too.