There is an Update Image API, documented at https://docs.openstack.org/api-ref/image/v2/index.html?expanded=update-image-detail#update-image. It does require an HTTP request body in JSON format.

However, it updates the image catalog entry, not the image data. If you want to replace image data, this is not possible, since the image catalog entry contains a checksum that can't be modified. Modified image data would not correspond to the checksum anymore (see the second note under https://docs.openstack.org/api-ref/image/v2, which also states "images are immutable").

Bernd Bausch.

Can you please list me , what i have to do different while updating Image in Glance using a API call, Can Some body share the Syntax for the same, Do i need to create a JSON file for the same