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This article provides a comprehensive overview of Kubernetes fundamentals, covering core control‑plane and node components, key object differences such as Pod vs Deployment, Service types, ConfigMap vs Secret, scheduling, health checks, scaling, security, storage, and troubleshooting techniques.
During a production deployment of large language model training on Kubernetes, a pod failed due to insufficient /dev/shm shared memory; the article details the root cause, explores missing pod spec parameters, and presents a complete solution using an emptyDir volume with medium: Memory and sizeLimit to configure shared memory.
This article explains how Kubernetes routes traffic from a pod to a Service and back to another pod, details the role of kube‑proxy with iptables or ipvs, and discusses how long‑lived connections are managed and potential load‑balancing issues.
This guide explains how to set up a Kubernetes pod to act as a Jenkins agent, covering prerequisites, deployment YAML, commands to launch and verify the pod and service, and the Jenkins UI configuration needed to connect the pod as a scalable CI/CD worker.
This article provides a concise, practical guide to Kubernetes fundamentals, covering pod creation, the essential compute‑network‑storage resources, cluster components, native objects like Deployments and StatefulSets, and the trade‑offs of standardization, elasticity, and extensibility.
This guide explains what NFS is, how to create a Kubernetes pod that mounts an NFS share, expose the pod via a NodePort service, and verify the NFS logs using standard Linux commands.
This article explains the fundamentals of Kubernetes Pods, covering their definition, creation methods, container count, networking model, storage options, and provides essential kubectl commands for managing Pods and deployments.
This article introduces a systematic approach for troubleshooting Kubernetes pod network problems, covering common failure models, essential diagnostic tools such as tcpdump, nsenter, paping and mtr, and detailed case studies that illustrate step‑by‑step analysis and resolution techniques.
This article explains how to debug live Kubernetes pods using temporary (ephemeral) containers that share namespaces, covering cluster setup, creating workloads, diagnosing network problems, tracing processes, and accessing node shells without restarting the original pods.
This proposal introduces in‑place vertical scaling for Pods by making PodSpec resources mutable, extending PodStatus with ResourcesAllocated, adding ResizePolicy and Resize fields, and updating the CRI UpdateContainerResources and ContainerStatus APIs to support live CPU and memory adjustments without restarting containers.
This article introduces Kubernetes as a Google‑originated container‑based distributed cluster management system, explaining its architecture, core components such as Master, Nodes, Pods, Services, etcd, and detailing how communication, scheduling, storage, external access, scaling, and controller coordination work together.
This guide demonstrates how to use kubectl commands to generate YAML definitions for a Deployment, expose it as a Service, and retrieve the Pod specification, providing complete code snippets and example manifests for each step.
This article provides a concise overview of Kubernetes architecture—including the master, nodes, and etcd—explains how deployments create replica sets and pods, describes pod fundamentals, container orchestration features, networking basics, and the role of services for microservice discovery and external access.
This guide walks developers through the evolution from physical and virtual deployments to containerization, explains Kubernetes architecture and core components, demonstrates building a one‑master‑two‑node cluster with kubeadm and Flannel, and details resource management using YAML with imperative and declarative kubectl commands.
This article walks readers through Kubernetes pod orchestration by breaking down the Pod YAML into Resource, Object, Spec, and Status sections, explaining REST API paths, metadata fields, lifecycle phases, health checks, and status reporting to deepen understanding of cloud‑native operations.
This article explains how the kube-ovn-cni component functions as a CNI plugin in Kubernetes, detailing its cmdAdd interface, interaction with the kube-ovn daemon, creation of veth pairs, OVS bridge integration, and network namespace configuration to manage pod network interfaces securely and efficiently.
This article explains what a Kubernetes pod is, why pods are needed instead of single containers, how the pause container enables shared namespaces, common pod deployment patterns, step‑by‑step creation with kubectl, and the detailed lifecycle and creation workflow of pods.
This article explains the kube-ovn-cni component of the Kube-OVN project, detailing the CNI workflow, the cmdAdd interface, daemon handling, and the configureNic function that together create and configure pod network interfaces within a Kubernetes cluster.
This article reviews the core structure of Kubernetes pods, explains how pods expose services externally, explores load‑balancing strategies using Services and virtual IPs, and details how kube‑proxy and selectors keep services in sync with changing pod lifecycles.
This guide explains how to configure CPU and memory requests and limits for Kubernetes pods, implement QoS classes, use LimitRange and ResourceQuota, and monitor resource usage with Prometheus queries and Grafana dashboards to ensure stable cluster operations.