oci

What’s in a Docker image?

It’s a good question, and before you know the answer, Docker images can seem pretty mysterious. Not only do I want to give you the answer, but I want to show you how I got there. Let’s start at the beginning. Hopefully you’re all familiar with a Dockerfile – the instructions on how Docker will build an image for you. Here’s a simple example. Each of these lines are instructions to Docker on how to build an image.
Read more

Crictl Vs Podman

As people continue to adopt CRI-O as a new container runtime for Kubernetes I am hearing questions from administrators who are confused whether they should use Crictl or Podman to diagnose and understand what is going on in a Kubernetes node. This is not one or the other — these tools are complementary, and this article attempts to explain the tools and examine when it is best to use each of these tools.
Read more