$ curl -Ski -b cookies.txt https://192.168.1.100:4507/ -H "Accept: application/x-yaml" -H "Content-type: application/json" -d '[{"client": "local", "tgt": "bootstrap", "fun": "metalk8s_volumes.device_name", "arg": ["/dev/loop1"]}]'
HTTP/1.1 200 OK
Content-Type: application/x-yaml
Server: CherryPy/5.6.0
Date: Wed, 30 Jun 2021 15:04:53 GMT
Allow: GET, HEAD, POST
Access-Control-Allow-Origin: *
Access-Control-Expose-Headers: GET, POST
Access-Control-Allow-Credentials: true
Cache-Control: private
Vary: Accept-Encoding
Content-Length: 27
Set-Cookie: session_id=23be7c9b8690d47c3cc695388c337fcadcae546e; expires=Thu, 01 Jul 2021 01:04:53 GMT; Path=/

return:
- bootstrap: false

$ salt-call metalk8s_volumes.device_name /dev/loop1
local:
    ----------
    result:
        loop1
    success:
        True

$ salt-call metalk8s_volumes.device_name /dev/invalid-path
local:
    ----------
    result:
        device `/dev/invalid-path` not found
    success:
        False