Snapstore Authentication Porblem

ahozdemir · March 7, 2022, 9:31am

Hi;

When we first install the image, the application cannot connect to the snapstore because the network connection comes later, but when we install the same image on it again, this time it authenticates with the snapstore. If possible, is there a way to authenticate the snapstore side manually and/or with a script?

bugraaydogar · March 7, 2022, 3:49pm

Hi @ahozdemir,

I’m assuming you can not get a serial assertion from the Serial-Vault in the initial boot. Snapd snap is responsible from getting the serial-assertion from the Serial-Vault by using the configuration in the gadget snap. If the snapd can not get a serial assertion due to the whatever reasons, then it re-tries every minute up to 15 times according to the mentioned lines in the below. But I’m not totally sure if this is a correct statement.

github.com

snapcore/snapd/blob/master/overlord/devicestate/handlers_serial.go#L67


func mustParse(s string) *url.URL {
	u, err := url.Parse(s)
	if err != nil {
		panic(err)
	}
	return u
}
var (
	keyLength     = 4096
	retryInterval = 60 * time.Second
	maxTentatives = 15
	baseStoreURL  = baseURL().ResolveReference(authRef)
	authRef    = mustParse("api/v1/snaps/auth/") // authRef must end in / for the following refs to work
	reqIdRef   = mustParse("request-id")
	serialRef  = mustParse("serial")
	devicesRef = mustParse("devices")
	// we accept a stream with the serial assertion as well
	registrationCapabilities = []string{"serial-stream"}

Would it be possible to share the output of the snap changes in case you could not fetch a serial assertion? Also, it is weird to have serial-assertion once you re-flash the image. What changes ? Do you format the disk before flashing the image?