Docker registry URLs

The doctl compute image create command requires an --image-url, but I can’t find what that URL looks like. If my registry is named RRR and my image name is going to be NNN, what would the URL be?

The documentation for the command says that a URL is required, but gives no examples of what one would look like. It does frequently mention URLs assigned to running containers, but my understanding is that this image doesn’t even exist yet, let alone run.

Here’s what I have for a command line so far. I’ve already run doctl registry login and querying the registry for info works.

doctl compute image create --image-distribution ubuntu-20-04-x64 --image-url ??? --region nyc1 NNN

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Hi there,

The --image-url is the URL from which the custom Linux virtual machine image may be retrieved.

The image it points to must be in the raw, qcow2, vhdx, vdi, or vmdk format. It may be compressed using gzip or bzip2 and must be smaller than 100 GB after being decompressed.

Example of a URL:

Hope that this helps.