I recently installed Ubuntu on one of the Pi’s are home and installed Podman - which I hadn’t heard of until recently and is a container engine, similar to docker but doesn’t have a daemon.

When trying to get a basic alpine test image running I got this error:

Error: error creating build container: short-name "python:3.7-alpine" did not resolve to an alias and no unqualified-search registries are defined in "/etc/containers/registries.conf"

Podam-compose error

This is because, shortnames it seems arent resolved by default - atleast not on the the Ubuntu (ARM) version. To fix this, the following needs to be added to the /etc/containers/registries.conf file:

1

unqualified-search-registries=["docker.io"]

Updating the registries.conf file

And once you save, these trying podcam-compose up should work as expected.

podman-compose up