K8s Log Collection Strategy: Choosing Between DaemonSet, Sidecar, and Agentless Patterns
Overview Production blows up, you open Kibana to search logs, and discover the critical Pod was OOM-killed 3 minutes ago—the old logs vanished with the container. This is extremely common in K8s environments: Pods are ephemeral, and logs can’t disappear with them. K8s log collection is fundamentally different from traditional VM environments. In a traditional setup, logs sit quietly in /var/log/ and you just SSH in to read them. In K8s, Pods can be scheduled to any node at any time, destroyed and recreated at will, with logs scattered across the entire cluster....