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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Kubernetes
Posts under Kubernetes.
Kubernetes collects 34 posts focused on practical patterns, operations context, and implementation details so readers can move from concepts to production decisions.
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A practical Kubernetes troubleshooting playbook for Pending Pods, CrashLoopBackOff, readiness failures, networking issues, and node-level problems.
Use better Kubernetes probes by choosing the right signal, tuning thresholds, and avoiding false restarts, traffic drops, and noisy rollouts.
How to make autoscaling predictable: right requests, sane HPA behavior, VPA recommendations, and capacity-aware cluster scaling.
A practical rollout path for Kubernetes NetworkPolicy: start with default deny, whitelist DNS and key dependencies, and avoid breaking production traffic.
Learn practical Kubernetes RBAC least-privilege patterns, how to reduce overbroad permissions, and which checks catch risky role bindings before incidents.
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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 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 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.
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 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 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 Tip: Debug Pods with Ephemeral Containers
Safely inspect a live Pod without baking debugging tools into production images.
Kubernetes Tip: Safer Rollouts with PDB + Surge/Unavailable
Combine Deployment rollingUpdate settings with PodDisruptionBudgets to keep availability during upgrades and node maintenance.
Kubernetes Tip: Requests & Limits (Without Surprises)
How CPU/memory requests and limits actually affect scheduling, throttling, OOMKills, and autoscaling.
Kubernetes Probes Explained: Liveness, Readiness, and Startup Checks
Learn how liveness, readiness, and startup probes work in Kubernetes, what each one should check, and how to avoid restart loops and false failures.
Helm + MySQL on Kubernetes: Install a Cluster and Understand the Tradeoffs
Use Helm to deploy a MySQL cluster on Kubernetes while understanding chart defaults, persistence, networking, and production tradeoffs.
kubectl Port-Forward Explained: Safe Debugging Access to Kubernetes Workloads
Learn how kubectl port-forward works, when to use it for debugging, and how it differs from Services, Ingress, and production traffic paths.
MySQL Replication on Kubernetes: Topology, Storage, and Failure Modes
Understand how to run MySQL replication on Kubernetes, including primary-replica design, storage concerns, failover risks, and operational checks.
Kubernetes Headless Service Explained: DNS, Pod Identity, and Stateful Workloads
Understand when to use a headless Service in Kubernetes, how DNS works without a virtual IP, and why it matters for StatefulSets and peer discovery.
Kubernetes StorageClass Explained: Dynamic Provisioning and Defaults
Understand how StorageClass enables dynamic provisioning in Kubernetes, how default classes work, and how to choose the right storage policy.
Kubernetes StatefulSet Explained: Stable Identity, Ordering, and Storage
Learn when to use a StatefulSet in Kubernetes, how stable Pod identity works, and why ordering and persistent storage matter.
Kubernetes PV and PVC Explained: Persistent Storage Basics
Learn how PersistentVolumes and PersistentVolumeClaims work in Kubernetes, how binding happens, and how to troubleshoot storage lifecycle issues.
Ephemeral Volumes
Ephemeral volumes live with the Pod and fit cache or temp files.
Kubernetes ConfigMap vs Secret: Configuration, Sensitive Data, and Safe Usage
Understand when to use ConfigMap or Secret in Kubernetes, how they reach Pods, and which practices reduce config drift and secret exposure.
Kubernetes Volumes Explained: EmptyDir, HostPath, and Persistent Storage Basics
Learn the core Kubernetes volume types, what data survives Pod restarts, and how to choose between temporary and persistent storage.
Running Stateful Apps on Kubernetes: Storage, Identity, and Operations
A practical guide to stateful applications on Kubernetes, covering storage choices, stable identities, rollout concerns, and failure handling.
Deploying MySQL on Kubernetes: Stateful Basics, Storage, and Services
Learn the essentials of running MySQL on Kubernetes, including StatefulSets, persistent storage, Services, and operational tradeoffs.
Kubernetes Declarative Configuration Explained: Apply, Drift, and Reconciliation
Understand declarative configuration in Kubernetes, why desired state matters, and how apply, diff, and reconciliation shape safe operations.
Kubernetes Canary Releases Explained: Safer Rollouts and Traffic Control
Learn practical canary release patterns in Kubernetes, how to reduce rollout risk, and which signals to watch before promoting traffic.
Kubernetes Service Explained: ClusterIP, NodePort, LoadBalancer, and DNS
Learn how Kubernetes Services provide stable networking for Pods, how service types differ, and how to troubleshoot selectors, endpoints, and traffic flow.
Kubernetes Namespaces Explained: Isolation, Scope, and Team Boundaries
Learn how Kubernetes Namespaces organize resources, scope policies and quotas, and support safer multi-team or multi-environment clusters.
Kubernetes Pods Explained: Lifecycle, Scheduling, and Debugging Basics
Understand what a Pod really is in Kubernetes, how Pods are scheduled and restarted, and which commands help you debug them.
Kubernetes Deployment vs ReplicaSet: Rolling Updates and Desired State
Learn how Deployments and ReplicaSets work together in Kubernetes, how rolling updates happen, and how to debug rollout and selector problems.
Install Minikube and Start a Local Cluster
Get a working single-node cluster fast with Minikube.
K3s Quick Start: Lightweight Kubernetes Setup and Core Concepts
Learn when to use K3s, how to install it quickly, and how to run core Kubernetes workloads on a lightweight cluster for labs and edge environments.
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