Where to put ssh-keys, so they can be used in data source configurations?

[d3mo17dot]

Hello,

because in the WebUI of Redash it is not possible to define a SSH tunnel with a data source configuration (to connect to a MySQL database trough), I followed the instructions to define data sources over the Redash API, as it is described here: https://redash.io/help/user-guide/integrations-and-api/ssh-tunnel-api/

But I need to connect with the authentication method to use a ssh-key ...
I use the pepared docker environment, but modified the docker-compose.yml to mount my rsa-keys to all of the service containers (redash-adhoc_worker-1, redash-scheduled_worker-1, redash-scheduler-1, redash-server-1, redash-worker-1) into the directory "/home/redash/.ssh"

In the JSON for defining the data source I placed the source of my key:

{
  "id": 3,
  "name": "MySQL Connection trough SSH tunnel",
  [...]
  "options": {
    "db": [...]
    "ssh_tunnel": {
      "ssh_host": [...]
      "ssh_key": "/home/redash/.ssh/id_rsa"
    }
  }
}

But when I test the connection (with POST to "/api/data_sources/3/test") I get the error "SSH tunnel: No password or public key available!"

Can anyone help me please?