I found myself setting up a new machine recently and was enjoying the usual fun of configuring all of my tooling again. One of those tools is CodeR...
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Enabling CPU virtualization is first step. I missed too.... Anyway, if you are looking very light containers go for lxc. New version of lxc also allows spinning of containers from iso file. Yup, vm as containers.
Funny enough, I'm running this to do some work with KubeVirt (so running VMs inside of containers). But thanks for the info on lxc. Will definitely need to check that out!