Import with gcloud cli requires the file to ends with .tar.gz, otherwise the command fails
gcloud compute images create --help
[...]
--source-uri=SOURCE_URI
The full Cloud Storage URI where the disk image is stored. This file
must be a gzip-compressed tarball whose name ends in .tar.gz. For
more information about Cloud Storage URIs, see
https://cloud.google.com/storage/docs/request-endpoints#json-api.
Import with
gcloud
cli requires the file to ends with.tar.gz
, otherwise the command fails