Containerization

Containerization

Containerization is the process of packaging an application and dependencies as an image and then running it as a container.

It can be useful to think of containers as the next generation of virtual machines (VM). Both are ways of packaging and running applications, but containers are smaller, faster, and more portable.

Despite these advantages, containers haven’t replaced VMs, and it’s common for them to run side-by-side in most cloud-native environments. However, containers are the firstchoice solution for most new applications.

All OpenShift Container Platform 4.10 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift Console or the CLI oc command. Instructions for upgrading a cluster are available at

The podman (Pod Manager) is a fully featured container engine that is a simple daemonless tool. podman provides a Docker-CLI comparable command line that eases the transition from other container engines and allows the management of pods, containers and images. Simply put: alias docker=podman. Most podman commands can be run as a regular user, without requiring additional privileges.

Flatpak is a system for running graphical applications as containers. A Flatpak application has access to content from two container images - the application itself, and the runtime image. To build against a particular runtime image, a corresponding SDK image is used. https://flatpak.org/      https://flathub.org/en