People associate running pods with Kubernetes. And when they run containers in their development runtimes, they do not even think about the role pods could play—even in a localized runtime. Most people coming from the Docker world of running single containers do not envision the concept of running pods. - Podman: Managing pods and containers in a local container runtime

Ultimate Docker to Podman Migration Guide: It’s NOT difficult

• Fortunately for us, Podman is described as a “drop-in replacement” for Docker. And it’s true.
• One huge difference, however, is that we are running in a rootless environment: we don’t need to add our user to a Podman group, or use sudo when running Podman commands. (using uid=0 is the correct thing to do here inside container for mouting folder)
• Podman on Ubuntu, for some odd reason, has no default registries included at all! An annoyance, but an easy fix.
• Enable Containers to Run After Logout: The root user is allowed to continue running processes in the background even when not logged-in. As we will be running in a rootless environment, we don’t have the same privilege by default.
• Restart Containers and Start on Boot: Systemd Unit files

Podman Kube Play Support

Currently, the supported Kubernetes kinds are:

• Pod
• Deployment
• PersistentVolumeClaim
• ConfigMap*
• Secret*
• DaemonSet

Compose

• Moving from docker-compose to Podman pods

SystemD

Note: podman generate systemd is deprecated. We recommend using Quadlet files when running Podman containers or pods under systemd.

PODs

✅ initContainers
✅ containers
✅ volumes - Only three volume types are supported by kube play, the hostPath, emptyDir, and persistentVolumeClaim volume types.
✅ hostname
✅ hostNetwork

• podman pod ps or podman ps --pod

• podman pod inspect paperless

• podman generate kube my-pod >> my-pod.yaml - Generate the YAML for our pod
• podman play kube ./my-pod.yaml - Bring up a pod from the YAML

Health Check

• Keeping services alive with custom healthcheck actions

Management tools

• Cockpit a web-based GUI for your server, has a nice plugin for us to manage Podman

Install

see also How To Install Podman 4 on Ubuntu 22.04

$ sudo apt-get -y install podman

podman command are closed to docker

Test that docker works

podman run hello-world

see also

• Podman Tutorial For Beginners: Step by Step Guides
• Using Podman pods Instead of docker-compose
  • alternatively Podman Compose or Docker Compose: Which should you use in Podman?

see also

• Containers vs. Pods - Taking a Deeper Look
• How to run pods as systemd services with Podman
• Dockerless, part 3: Moving development environment to containers with Podman