Category
Three signals and the different questions they answer, the trace-ID join that delivers 80% of the value, the collector pattern, tail-based sampling that keeps the interesting 100%, and the incident-driven rollout.
The four flag species and why conflating them causes misery, sticky percentage rollouts with one decision point, the staged rollout playbook with observability hooks, and the hygiene that prevents flag archaeology.
The four objects that carry a production service, annotated line by line: probes that don't lie, honest resource requests, zero-downtime rollouts, HPA caveats and the boring starter kit that ages well.
From the while-true-Task.Delay era to clustered schedulers: persistent job stores, misfire policies, timezone traps, idempotent job design and the observability layer everyone skips.
Why I keep coming back to Graylog for self-hosted log management: the GELF setup, structured logging from .NET and Laravel, streams that route and alert, and the retention math nobody does.
When cluster number two arrives, Rancher stops being a dashboard and starts being a hiring decision you skip: RBAC done once, Fleet GitOps, K3s at the edge, and the rules I learned the hard way.
A candid comparison from someone who has operated both: the philosophical split, the same pipeline in Jenkinsfile and .gitlab-ci.yml, where each tool still wins, and one rm -rf war story.
