A practical boundary guide: Docker packages and runs containers, Kubernetes orchestrates and keeps services stable at scale, and OpenStack turns datacenter hardware into an IaaS resource pool (VM/network/storage).
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Tips
Posts under Kubernetes / Tips.
Kubernetes / Tips collects 9 posts focused on practical patterns, operations context, and implementation details so readers can move from concepts to production decisions.
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Safely inspect a live Pod without baking debugging tools into production images.
Learn practical Kubernetes RBAC least-privilege patterns, how to reduce overbroad permissions, and which checks catch risky role bindings before incidents.
A practical rollout path for Kubernetes NetworkPolicy: start with default deny, whitelist DNS and key dependencies, and avoid breaking production traffic.
How to make autoscaling predictable: right requests, sane HPA behavior, VPA recommendations, and capacity-aware cluster scaling.
How CPU/memory requests and limits actually affect scheduling, throttling, OOMKills, and autoscaling.
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Kubernetes vs Docker vs OpenStack: Stop Comparing Tools at Different Layers
A practical boundary guide: Docker packages and runs containers, Kubernetes orchestrates and keeps services stable at scale, and OpenStack turns datacenter hardware into an IaaS resource pool (VM/network/storage).
Kubernetes Tip: Debug Pods with Ephemeral Containers
Safely inspect a live Pod without baking debugging tools into production images.
Kubernetes RBAC Least Privilege: Safer Roles, Bindings, and Access Review
Learn practical Kubernetes RBAC least-privilege patterns, how to reduce overbroad permissions, and which checks catch risky role bindings before incidents.
Kubernetes NetworkPolicy Best Practices: Default Deny, DNS, and Safe Rollout
A practical rollout path for Kubernetes NetworkPolicy: start with default deny, whitelist DNS and key dependencies, and avoid breaking production traffic.
Kubernetes Tip: Autoscaling Without Thrash (HPA + VPA + Cluster Autoscaler)
How to make autoscaling predictable: right requests, sane HPA behavior, VPA recommendations, and capacity-aware cluster scaling.
Kubernetes Tip: Requests & Limits (Without Surprises)
How CPU/memory requests and limits actually affect scheduling, throttling, OOMKills, and autoscaling.
Kubernetes Troubleshooting Playbook: Pending, CrashLoopBackOff, and Traffic Failures
A practical Kubernetes troubleshooting playbook for Pending Pods, CrashLoopBackOff, readiness failures, networking issues, and node-level problems.
Kubernetes Tip: Safer Rollouts with PDB + Surge/Unavailable
Combine Deployment rollingUpdate settings with PodDisruptionBudgets to keep availability during upgrades and node maintenance.
Kubernetes Probe Best Practices: Liveness, Readiness, Startup, and Failure Signals
Use better Kubernetes probes by choosing the right signal, tuning thresholds, and avoiding false restarts, traffic drops, and noisy rollouts.