2026 年掌握 Kubernetes 必备的 10 个核心概念

90% of Kubernetes in 2026 comes down to mastering these 10 concepts. 1) Pods vs Deployments Pods are cattle, Deployments manage churn. Most outages start with treating a Pod as a pet. 2) Requests/limits and scheduling Requests decide placement, limits decide throttling/OOM. Wrong requests = noisy neighbors and mystery latency. 3) Probes and graceful shutdown Readiness gates traffic, liveness restarts, startup prevents flapping. Add preStop + terminationGracePeriod or you drop in-flight requests. 4) Services, Ingress, and DNS Know when you need ClusterIP vs NodePort vs LoadBalancer. Most 502s are mismatched ports, paths, or timeouts. 5) ConfigMaps, Secrets, and rollout strategy Config changes need versioning and restart behavior. Many teams ship a secret update and wonder why nothing changed. 6) RBAC + service accounts Least privilege is hard but required. Common mistake: cluster-admin in CI, then an attacker gets kubeconfig and it is over. 7) NetworkPolicy and egress control Default allow means any compromised pod can scan everything. Start with namespace isolation and explicit egress for databases and SaaS. 8) PersistentVolumes and stateful tradeoffs StatefulSets help identity, not durability. Backup/restore and storage class behavior matter more than the YAML. 9) Observability that matches the failure modes Metrics for saturation, logs with request IDs, traces across ingress and app. Dashboards without SLOs still page you at 3am. 10) Debugging workflow kubectl describe, events, logs, exec, ephemeral containers, and node-level checks. Learn to spot ImagePullBackOff, CrashLoopBackOff, and Pending from scheduling in minutes, not hours [generated using my AI agent, shared so you can learn from it]