40 articles
Understand the Linux kernel features behind containers. Learn namespaces for PID, network, and mount isolation, cgroups for CPU and memory limits, and how to build a container by hand with unshare and nsenter.
CIDR cheat sheet: /24 = 254 usable IPs, /20 = 4,094, /16 = 65,534. Quick reference table, AWS subnet reservation rules, and VPC carving examples.
The microservices vs monolith decision depends on team size, deployment needs, and organizational structure. Learn the five-question decision framework, the Strangler Fig migration pattern, and why most teams should start with a well-structured monolith.
Canary deployments route a small percentage of traffic to the new version, catching problems before they affect everyone. Learn implementation with Nginx, Argo Rollouts, Flagger, and feature flags.
Master Helm charts: chart anatomy, Go templating, values overrides, public registries, release management, lifecycle hooks. Plus when to use Kustomize instead.
Understand service mesh architecture with sidecar proxies and the data/control plane split. A detailed Istio vs Linkerd comparison covering performance, complexity, features, and when a mesh is justified.
Understand Kubernetes resource requests vs limits, QoS classes, OOM kills, CPU throttling, VPA auto-tuning, and namespace quotas. The configuration that decides if your Pod lives or dies.
Compare Kubernetes Ingress controllers -- nginx-ingress, Traefik, HAProxy, Contour. Learn path and host routing, automatic TLS with cert-manager, and the Gateway API.
Understand Docker's four network drivers -- bridge, host, overlay, and none. Learn how container DNS resolution works, when to use each driver, and how port mapping actually functions.
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