OpenNebula

I tried to implement a workaround by configuring a rewrite rule (rewrite '/appliance' -> '/market/') but to no avail: JSON response "{
"error": {
"message": ""
}
}"

Hi Stefan,

You should modify the following lines:
https://github.com/OpenNebula/one/blob/master/src/cloud/marketplace/lib/marketplace_client.rb#L44
https://github.com/OpenNebula/one/blob/master/src/cloud/marketplace/lib/marketplace_client.rb#L49

to something like:
req = Net::HTTP::Proxy(@host, @port)::Get.new(@uri.path + path)
req = Net::HTTP::Proxy(@host, @port)::Post.new@uri.path + (path)

If you are using the appmarket library (that means you added a new tab in sunstone instead of using the marketplace tab and added a new route in sunstone-server), you should modify the Get,Post,Put,Delete methods adding the @uri.path:
https://github.com/OpenNebula/addon-appmarket/blob/master/src/client/lib/appmarket_client.rb#L145

Hope this helps

I applied the changes as suggested by Daniel and can confirm that these changes make it work (marketplace as well as appmarket tab). For the "marketplace_url / Appmarket endpoint" a note should be added that "/appliance" is added to the request uri, so to avoid /market/appliance/appliance calls.