Podman

We mentioned earlier that there is an exception when using Docker Engine on your Edge devices. Note that Docker Engine is not available for use on Red Hat Enterprise Linux (RHEL), except for on s390x machines (aka the zOS mainframe, which, arguably, stretches the definition of an Edge device) 8.

8 https://docs.docker.com/engine/install/

Red Hat includes Podman in its Linux OS distribution9 subscription. Podman is OCI-compliant and, thus, can host any of your Containers, just like Docker (and Kubernetes).

9 https://hyperscience.zendesk.com/hc/en-us/articles/6203576198029-Configuring-Podman-in-RHEL-8

Podman introduces some interesting and potentially important differences, including that it implements a fork and exec (aka daemonless) architecture and always runs rootless.

Conversely, RHEL is a relatively large operating system. While it is derived from the same standard open source Linux kernel as other Linux OSes, it has a number of additional...