2025-04-05 –, Aula Minor
Language: Slovak
Let’s explore containers. But this time from a networking perspective. How do containers communicate within a single machine using a container runtime like Docker? And how do they connect across multiple hosts in orchestrators like Kubernetes? This talk covers the fundamentals of container networking, providing a clear overview, whether you're new to the topic or looking to deepen your understanding.
Containerized applications rely on robust networking to function efficiently, whether they are running on a single host or across multiple machines in a cluster. This session will break down the key networking concepts that enable container communication.
We'll start with how containers communicate on a single machine, covering bridge networks and virtual Ethernet pairs. Then, we'll move to cross-node communication, exploring overlay networks, VXLAN, and direct IP routing. We’ll also discuss Container Network Interface (CNI) and IP Address Management (IPAM), which are critical components in Kubernetes and other orchestrated environments.
I'm ordinary engineer who is constantly jumping between code and infrastructures. I like to be in both boots - SWE and SRE. Most of my life I spent as programmer - with touching the code. But also I was always very close to cloud and on-prem infrastructures, Kubernetes and containers. After years of C/C++ and Java I jumped into Go lang bandwagon. And I'm more than happy with this language.
I have passion for container internals, for Kubernetes and networking of containers. In my spare time, I'm blogging on (https://okontajneroch.sk) and speaking about containers on meetups for our local tech community in Kosice.