Including console-conf in a model assertion

Model assertions define the snaps that a system will install on first boot.

Adding console-conf would be a matter of adding a snap to the snaps list in the json source for the assertion, for instance:

        {
            "name": "console-conf",
            "type": "app",
            "default-channel": "24/stable",
            "id": "ASctKBEHzVt3f1pbZLoekCvcigRjtuqw",
            "presence": "optional"
        }

The track for the default channel should match the base (which in the end is the Ubuntu Core version) of the model assertion. To know the available tracks, run snap info console-conf from the command line.

In this case we have set the snap as optional, so we can decide at image build time if we want to include it and then create a development image, or do not include it to create a production image.

We can sign the final assertion with

$ snap sign model.json > model.assert

After this, we can create an image that would include console-conf with

$ ubuntu-image snap --snap=console-conf model.assert