When we started the "Network observability" project in Outbrain we had one internal customer in mind: the security team, and its desire to identify network anomalies.
Already after the initial design, we quickly realized that using the power of opensource eBPF tools (with some custom code to enrich the collected data) in our 8k servers on-prem datacenters + public cloud environments, we will be able to unfold the ability to easily (and in a cheap way!) to monitor almost anything within our infrastructure. From understanding expensive dataflows (egress from the clouds) to understand who's "hammering" our on-prem CEPH S3 solution.
For sure, we could do it in other ways as well, but we realized the we have "one solution to fit (almost) all!", without the need to write multiple-custom-solutions.

In the lecture i'll present the technology (mostly CNCF based), how it works in an k8s based (but not only) eco system, which data is being collected, and some of our day-to-day usages.