Hands‑on DevOps operations using Docker, K8s, Jenkins, and Ansible—empowering ops professionals to grow together through sharing, discussion, knowledge consolidation, and continuous improvement.
This guide explains how to create a swap file on a Linux server, enable it, configure it to start at boot, and adjust the swappiness parameter to control virtual memory usage, providing step‑by‑step commands and explanations for each operation.
This curriculum outlines a 25‑week advanced Java engineering program covering performance optimization, JVM internals, concurrency, distributed storage, MySQL and NoSQL databases, Docker, Kubernetes, microservices, Spring framework deep dives, Nginx, Elasticsearch, Redis, messaging systems, CI/CD tools, and hands‑on project implementation to build high‑performance, scalable backend systems.
This article explains common Kubernetes DNS resolution failures, both for external domains and internal service discovery addresses, and provides a step‑by‑step troubleshooting workflow that includes checking CoreDNS, examining resolv.conf, adjusting DNS settings, and recreating CoreDNS when necessary.
This article explains the Zabbix‑Agent active mode workflow, detailing how the agent initiates TCP connections to the Zabbix‑Server to request monitoring items, receives the item list, sends collected data back, and provides step‑by‑step configuration of the agent and server, including template cloning and essential parameters.
This guide explains common Kubernetes DNS problems—including failure to resolve external domains, inter‑pod service discovery addresses, and related impacts on applications like Nginx reverse proxies—and provides step‑by‑step troubleshooting procedures such as checking CoreDNS, inspecting resolv.conf, and customizing dnsPolicy and dnsConfig in pod specifications.
This guide explains how to configure a Linux server with two network interfaces—one for an internal private network and one for external access—by setting static IPs, adding a static route, and ensuring the configuration persists across reboots using rc.local.
This tutorial series provides a step‑by‑step technical guide to training, deploying, and fine‑tuning the MiniDeepSeek V3+R1 large language model, covering model performance, open‑source details, API usage, parameter explanation, multi‑turn chatbot construction, function calling, integration with Open WebUI, GraphRAG, Swarm, and various deployment and optimization techniques.
This MySQL course provides an extensive curriculum covering advanced functions, transaction management, backup and recovery, user permission handling, and multi‑table relationships, presented through a series of video modules that guide learners from fundamental concepts to practical, production‑level implementations.
This comprehensive training program for intermediate to advanced users covers Kubernetes high‑availability deployment, elastic scaling, Helm package management, Ceph distributed storage integration, microservice container migration, Jenkins‑based CI/CD pipelines, and Istio service‑mesh governance, providing hands‑on labs, detailed chapters, and practical resources for mastering modern cloud‑native operations.
This extensive tutorial series provides step‑by‑step video guides covering the design and implementation of an e‑commerce core order system, promotional processes, distributed services, a high‑concurrency seckill platform, performance tuning techniques, microservice architecture with Spring Cloud Alibaba, and cloud‑native deployment using Docker, Kubernetes, Prometheus, and Grafana.
