This guide explains Docker’s built‑in health‑check feature, covering process‑level checks, Dockerfile HEALTHCHECK syntax, runtime options with docker run, and health‑check configuration in docker‑compose, complete with practical examples and troubleshooting tips.
This guide walks through installing Docker and Jenkins on CentOS 7, configuring Jenkins with necessary plugins, setting up Maven, creating a Jenkins pipeline to pull, build, and containerize a Spring Boot project, and finally testing and running the application automatically, providing a complete one‑click CI/CD solution.
This guide explains how to view Docker and Kubernetes container exit codes, lists the most common codes such as 0, 1, 137, 139, and 143, describes what each code means, and shows the commands and scenarios that generate them.
This guide walks through setting up Docker and Jenkins on CentOS, configuring a Spring Boot project, creating a Jenkins pipeline, and automating build, test, and deployment steps to achieve one‑click continuous integration and delivery.
This guide walks through Docker's container networking options, explaining container mode sharing, building and testing overlay networks with Consul, and configuring Macvlan networks for cross‑host communication, complete with step‑by‑step commands and visual diagrams.
This tutorial walks you through creating a simple SpringBoot web application, containerizing it with Docker, and deploying it to a Kubernetes cluster using Pods, Deployments, Services, and Ingress, while highlighting common pitfalls and comparing Java's resource usage to Go.
This tutorial walks through the complete process of configuring MySQL master‑slave replication, preparing Docker containers, configuring MyBatisPlus and ShardingSphereJDBC for read‑write splitting, building a Spring Boot project with the necessary dependencies, generating code, and testing the setup with sample controller endpoints.
This article explains how Kubernetes' kubelet performs container and image garbage collection, details the configurable thresholds and limits, and presents step‑by‑step experiments that demonstrate the impact of different settings on image and container cleanup behavior.
This guide explains Docker's built‑in network types, the four primary network modes (bridge, host, container, none), how the Docker bridge (docker0) works, how to create and manage Linux network namespaces, veth pairs, and custom bridge networks, plus practical commands for inspection and port mapping.
This guide provides step‑by‑step instructions for installing Docker on CentOS and Ubuntu, configuring image accelerators for faster pulls, and using Docker commands to pull, run, list, and clean up images and containers, including tips for handling dangling and intermediate layers.
This article chronicles the evolution of a SaaS product from a simple monolithic SPA through microservice decomposition to containerized deployment, detailing API design, CI/CD pipelines, Spring Cloud and Kubernetes integration, automated tracing, monitoring, and lessons learned for small development teams.
A Docker security flaw allows services bound to the loopback address with -p 127.0.0.1 to be reachable from external hosts due to an iptables rule, and the article explains the issue, demonstrates a proof‑of‑concept, and proposes tightened firewall rules as a fix.
This article explains how Docker containers rely on Linux cgroups and namespaces for resource isolation, details CPU share and quota scheduling, and shows practical commands to inspect cgroup assignments, helping developers optimize container performance on Kubernetes.
This article recounts a graduate student's step‑by‑step experience joining the CNCF Sealer project, detailing why the sandbox project attracted them, the challenges of early contributions, practical tips for navigating documentation, issues, pull requests, and community meetings, and how they eventually helped refactor the runtime module.
This article examines the challenges of running MySQL in Docker containers, highlighting data safety concerns, I/O performance bottlenecks, statefulness issues, and resource isolation limits, while also outlining scenarios where containerization can work and offering practical mitigation strategies.
This article explains how Fluentd works in distributed and containerized environments, walks through its core concepts of input, filter, and output plugins, and provides a step‑by‑step Docker demo that collects, filters, parses, and stores Kubernetes application logs for further analysis.
This article systematically explains container cloud network architecture, covering fundamental concepts, protocol stacks, traversal and isolation methods, Docker and Kubernetes networking models, and a detailed comparison of CNI solutions such as Flannel, OVS, and Calico.
The guide shows how to deploy an Nginx container with Docker, configure it to proxy a custom domain to a SpringBoot microservice registered in Nacos, add a Spring Cloud Gateway upstream, and route all requests through Nginx, simplifying access and eliminating CORS issues.
This tutorial demonstrates how to use OpenMLDB together with OneFlow to build an end‑to‑end machine‑learning pipeline for predicting high‑potential JD users' purchase intent, covering environment setup, data loading, SQL table creation, offline feature extraction, DeepFM model training, model serving, online feature extraction, deployment, and real‑time inference.
This tutorial demonstrates how to set up MySQL master‑slave replication using Docker, configure MyBatisPlus and ShardingSphereJDBC for read/write splitting, and integrate the setup into a Spring Boot application with Druid, code generation, and REST endpoints for testing.
This comprehensive guide walks you through installing Docker on various operating systems, configuring image accelerators for faster pulls, and mastering Docker image management—including pulling, running, listing, filtering, and cleaning up images and containers—while addressing platform‑specific considerations.
This article explains what Docker container exit codes mean, how to view them using Kubernetes or Docker commands, and details the most common codes such as 0, 1, 137, 139, and 143, helping you diagnose why a container is not running.
This article traces the 20‑year evolution of container technology—from early Unix chroot and FreeBSD jail, through Linux namespaces, cgroups and Docker’s image system, to modern orchestration with Kubernetes and cloud‑native runtimes—explaining core concepts, architectures, and best‑practice guidelines for building and managing containers.
This article explains why Docker containers stop running by detailing how to view exit codes, describing the most common exit codes such as 0, 1, 137, 139, and 143, and clarifying the actions that cause each code, helping developers troubleshoot container failures.
The open‑source DevOps tool Jenkins now requires Java 11 as a minimum runtime from version 2.357 onward, explains the migration history from Java 8, outlines benefits of newer Java versions, and recommends adopting Java 17 for better performance, security, and developer attraction.
IntelliJ IDEA 2022.2 introduces extensive remote development upgrades, JetBrains Runtime 17, full Spring 6/Boot 3 support, numerous UI enhancements, language‑specific inspections for Java, Kotlin, Scala, Docker integration improvements, and security features, delivering a faster, more stable development experience.
Learn how to securely self‑host a GitLab instance on an Ubuntu server using Docker, covering dependency installation, SSH port configuration, Docker volume setup, compose file creation, container deployment, and accessing the web interface, with alternative deployment methods for troubleshooting.
This article provides an extensive overview of microservice architecture, tracing its evolution from monolithic to distributed services, detailing the advantages and drawbacks of each stage, and presenting a practical technology stack—including service discovery, API gateways, containerization, orchestration, logging, monitoring, and CI/CD—to help engineers design, implement, and operate modern cloud‑native systems.
This guide provides step‑by‑step instructions for installing Docker on CentOS and Ubuntu, configuring accelerated image mirrors, managing Docker images—including listing, tagging, and removing—while covering essential commands, storage considerations, and best practices for both systemd and upstart environments.
This article explains how to compile FFmpeg and its dependencies to WebAssembly using Emscripten and Docker, covering the basics of WASM, compiler toolchains, build scripts, configuration flags, and the resulting output files, providing a practical guide for front‑end developers seeking high‑performance media processing in the browser.
This article explains the key Prometheus metrics for Kubernetes container CPU usage, provides exact PromQL formulas for calculating per‑container CPU percentages, and details how Docker stats reports memory and CPU usage, including the necessary calculations and sample code.
Starting with Jenkins 2.357 released on June 28 and the forthcoming September LTS version, the open‑source CI/CD tool Jenkins will require at least Java 11, ending Java 8 support and encouraging users to adopt newer runtimes such as Java 17 for better performance and security.
This tutorial walks through setting up MySQL master‑slave replication using Docker, configuring ShardingSphereJDBC for read‑write splitting, and integrating it into a Spring Boot project with MyBatis‑Plus, covering environment preparation, core theory, detailed configuration, and testing procedures.
This talk walks through Docker’s appeal, its rise to popularity, the underlying container technology history, core architecture, networking, namespaces, cgroups, and common commands, illustrating how containers streamline deployment compared to traditional VMs and why Docker remains pivotal in cloud-native environments.
This article explains Docker image fundamentals and presents four practical techniques—removing package caches, ordering layers by change frequency, separating build and runtime stages, and inspecting layers with dive—to dramatically shrink image size, speed up builds, and improve security.
This guide explains what WSL 2 is, its advantages over virtual machines, and provides step‑by‑step instructions for installing WSL, selecting a Linux distribution, and integrating it with VS Code and Docker to create a seamless development environment on Windows.
This guide explains Dockerfile fundamentals, walks through each core instruction with practical examples, demonstrates building images for simple CentOS containers, SpringBoot applications, and shows how to tag, push, and pull images from a registry, providing clear step‑by‑step commands and explanations.
A recent Hacker News discussion revealed that Docker’s iptables rule allows containers bound to 127.0.0.1 to be reachable from other hosts, and a step‑by‑step proof‑of‑concept demonstrates the issue while a revised iptables rule is proposed to enforce proper source‑address restrictions.
Jenkins announced that starting with version 2.357 and the upcoming September LTS release, the CI/CD platform will require Java 11, outlining the migration history from Java 8, the benefits of newer runtimes, and the team’s recommendation to adopt Java 17 for better performance and security.
Building a successful software company hinges on delivering valuable software quickly, and this article explains how we adopted Drone CI as the core of our continuous delivery pipeline—detailing its open‑source nature, Docker‑based architecture, service support, plugin ecosystem, testing integration, and artifact management.
Kubernetes, evolving from Google’s Borg and built on Docker’s lightweight containers, became the dominant cloud‑native orchestration platform by offering a declarative API, extensible plug‑in architecture, and robust control‑plane components that automate deployment, scaling, service discovery, and self‑healing across distributed workloads.
This guide walks you through setting up a Docker container, installing tcpdump, capturing HTTP/TCP traffic with tcpdump, dissecting the three‑way handshake and data exchange, saving packets to a pcap file, and using Wireshark for deeper analysis and filtering.
This article examines why containerizing MySQL with Docker often leads to data safety risks, performance bottlenecks, state management challenges, and resource isolation problems, while also outlining scenarios and strategies where MySQL can successfully run in containers.
This guide covers common Docker problems such as migrating storage directories, handling insufficient disk space, missing shared libraries, container deletion issues, network configuration, command usage, and provides step‑by‑step solutions with code examples.
This article walks through upgrading the open‑source Mall‑Tiny e‑commerce project to SpringBoot 2.7.0, detailing version changes for the entire technology stack, configuration tweaks, code adjustments, and deployment documentation updates to help developers perform a smooth migration.
This tutorial demonstrates how to set up automated Docker image vulnerability scanning with Trivy, embed the scan into GitLab CI/CD pipelines, handle severity thresholds, schedule recurring scans, and remediate findings by adjusting the Dockerfile, providing a practical DevOps security workflow.
An exposed Docker security flaw allows services bound to 127.0.0.1 via the -p flag to be accessed externally through iptables rules, as demonstrated by a PostgreSQL container proof‑of‑concept, and the article proposes stricter iptables configurations and default localhost binding to mitigate the risk.
This article explains why microservice architecture is preferred over monolithic applications, outlines a clear learning roadmap, and details essential concerns such as Docker, container orchestration, API gateways, load balancing, service discovery, event buses, logging, monitoring, distributed tracing, data persistence, caching, and cloud providers.
This comprehensive guide walks you through designing a simple front‑end/back‑end microservice architecture, implementing it with Spring Boot, adding service discovery, monitoring, logging, tracing, and flow control, and finally deploying the entire system on a Kubernetes cluster with high availability and verification steps.
This article walks through the complete process of creating a highly available MySQL master‑master cluster using Docker containers, MySQL replication, and Keepalived for automatic health checks, virtual IP failover, and seamless traffic switching, while also sharing common pitfalls and their solutions.
This article provides a step‑by‑step guide to creating a simple Spring Boot microservice that uses gRPC for communication, integrates with Istio as a service mesh, containerizes the applications with Docker, and deploys both server and client to a Kubernetes cluster with full configuration files and code examples.
This article explains how to build a Docker‑containerized PaaS platform that uses Spring Cloud Netflix components such as Zuul, Eureka, and Hystrix to provide service gateway, registration, discovery, fault tolerance, and dynamic configuration for scalable microservice applications.
This article walks through setting up a high‑availability MySQL environment using master‑master replication and Keepalived on two Ubuntu servers, covering architecture design, Docker container preparation, MySQL configuration, Keepalived installation, failover testing, and troubleshooting common issues.
This article introduces JetLinks, an open‑source, enterprise‑grade IoT platform built on a reactive Java stack, outlines its rich features and architecture, and provides step‑by‑step Docker and non‑Docker deployment instructions so developers can quickly launch and explore the system.
This guide explains Docker container logging pitfalls, compares Kubernetes log collection levels, and presents a unified log‑aggregation architecture using S6‑based images, Filebeat, logrotate, Kafka, and Logstash, with practical steps for dynamic configuration and rotation.
This article explains how to create a plug‑and‑play microservice flow orchestration using Docker‑based Nacos, three SpringBoot services, and Kafka, covering installation, configuration, dynamic topic management, and runtime consumer updates for flexible data pipelines.
This guide explains ClickHouse fundamentals, OLAP versus OLTP concepts, columnar storage benefits, core performance techniques, the MergeTree family and its indexing, specialized table engines, installation on Linux, Docker deployment, and integration with HDFS, MySQL, and Kafka for modern analytical workloads.
This guide explains how to install Fluentd via Docker or manual methods, configure the environment (NTP, file descriptors, kernel parameters), use the td-agent package, manage services with systemd, send test logs, and understand Fluentd's event lifecycle, filters, labels, and configuration directives.
The article explains how attackers can break out of Docker containers by exploiting misconfigurations, vulnerable Docker components, kernel bugs, or Kubernetes RBAC errors, illustrates real‑world exploits such as host‑proc mounts and CVE‑2019‑5736, and provides mitigation steps like limiting privileges, updating software, and securing configurations.
The article examines WebAssembly's strengths and limitations as a potential Docker alternative, highlighting its portability, security, and edge‑computing advantages while acknowledging Docker's continued relevance for legacy services and complex workloads.
This tutorial walks through setting up a highly available MySQL master‑master cluster using Docker containers, configuring MySQL replication, and employing Keepalived for automatic failover and virtual IP management, complete with step‑by‑step commands, configuration files, and troubleshooting tips.
Learn how to enable IntelliJ IDEA’s built‑in Docker plugin, configure remote Docker connections, manage images and containers, build custom Docker images from a SpringBoot project, and deploy the application using Docker Compose—all without leaving the IDE.
This article explores the evolution of cloud computing into its second half, defining cloud native through CNCF's perspective, tracing its history from early Linux containers and Cgroups to Docker and Kubernetes, and detailing the core technologies—containers, service mesh, microservices, immutable infrastructure, and declarative APIs—while highlighting their practical benefits for rapid iteration, automated deployment, and efficient, scalable applications.
This article explains the concept of gray (canary) releases for front‑end projects, compares several practical deployment schemes—including simple Nginx weighting, Nginx + Lua + Redis, server‑side rendering, client‑side annotation, and a full Nginx + backend + Redis + SDK solution—provides code samples, Docker‑compose instructions, and operational tips for rollout and rollback.
This comprehensive tutorial walks readers through Docker fundamentals, compares virtual machines with containers, explains core Docker concepts, demonstrates installation on macOS, shows how to build and run a Docker image for a Vue project, and provides best‑practice tips for containerized deployments.
This guide walks through upgrading a single‑node Redis deployment to a high‑availability setup by building a master‑slave cluster, configuring Sentinel services, testing replication and failover, and enabling client auto‑detection of master changes, all using Docker containers and configuration files.
This guide walks through troubleshooting DBLE container deployment by adjusting Docker network subnets, correcting DBLE configuration IPs, and granting the necessary database permissions to ensure the logical schema is created without errors.
This article explains what gray (canary) release is, describes several practical front‑end gray‑release schemes—including simple Nginx weighting, Nginx + Lua + Redis, server‑side rendering routing, and a full Nginx + backend + Redis + frontend SDK solution—provides code snippets, Docker commands and operational tips for safely rolling out new features.
This guide walks developers through selecting Sentry, deploying it with Docker, configuring alerts, managing quotas, and integrating the platform into Flutter (as well as other languages), offering practical tips and solutions to common installation issues.
This article provides a detailed tutorial on Apache Airflow fundamentals, Docker-based installation on Windows, Dockerfile creation, container deployment via Docker run and Docker Compose, Airflow configuration, and practical usage of DAGs, tasks, connections, and UI features for data pipeline orchestration.
This article explains Linux signals, their role in Docker container shutdown, and demonstrates with Go and shell examples how using the exec form in Dockerfile ENTRYPOINT/CMD ensures containers receive termination signals for a clean exit.
This article explains Docker's layered image storage, shows how improper layering inflates image size and download time, and provides a practical design method using shared base layers to streamline CI/CD pipelines and improve resource efficiency.
This tutorial explains why read/write splitting is useful, shows step‑by‑step how to build a MySQL master‑slave cluster with Docker, configure the master and slave instances, and then use Sharding‑JDBC to transparently route writes to the master and reads to the slave.
This article explains Docker's networking fundamentals, covering Linux veth pairs, the default docker0 bridge, container IP allocation, the deprecated --link option, and how to create and use custom bridge networks to achieve service‑name based communication and network isolation.
The Python team released a beta of Python 3.11, and benchmark tests using Docker on an M1 Pro MacBook Pro show the new version averaging 14% faster than 3.10 and achieving up to 64% speed improvements in many workloads, highlighting notable performance enhancements.
This guide explains Docker's networking fundamentals, covering Linux veth pairs, the default docker0 bridge, container linking with --link, creating custom bridge networks, and connecting containers across networks, complete with command examples and inspection outputs.
This article explains why microservice architecture improves flexibility and scalability, outlines a clear learning roadmap, and details essential components such as Docker, orchestration, API gateways, load balancing, service discovery, event buses, logging, monitoring, tracing, data persistence, caching, and cloud providers, helping readers start or migrate to microservices.
This tutorial introduces MinIO, an open‑source object storage solution, explains its features and application scenarios, provides step‑by‑step Docker installation, shows how to configure it, and demonstrates integrating MinIO with Spring Boot to upload files via SDK.
This article provides a comprehensive, English‑language tutorial on building MySQL master‑master high availability using Keepalived, covering architecture design, Docker‑based MySQL deployment, replication configuration, Keepalived installation, virtual IP setup, failover testing, and a detailed list of encountered pitfalls and their solutions.
This guide compiles 24 practical Docker troubleshooting scenarios—from storage migration and disk space errors to network configuration, NFS mounts, and container management—providing clear problem descriptions, step‑by‑step solutions, and ready‑to‑use command snippets for Linux environments.
Docker Desktop, the integrated Docker IDE, has finally been released for Linux, offering the same experience as on macOS and Windows, while also introducing Docker Extensions, a new SDK, and sparking debate over recent subscription pricing changes that affect enterprise users.
This article provides a comprehensive tutorial on pulling Elasticsearch Docker images, configuring data directories, creating cluster configuration files, adjusting JVM settings, launching three Elasticsearch nodes in Docker containers, and verifying the cluster using both the REST API and the elasticsearch‑head UI.
A recent benchmark using the pyperformance suite shows that Python 3.11 beta runs up to 64% faster than Python 3.10 on most tests, with an overall 14% speed increase, highlighting the language’s long‑awaited performance improvements.
YouLai Mall is an open‑source full‑stack e‑commerce solution built with Spring Boot 2.4, Spring Cloud, Vue, element‑ui and uni‑app, offering microservice back‑ends, a management portal, WeChat mini‑program and mobile app, with detailed deployment instructions and source code links for rapid development.
This article provides a comprehensive overview of Podman, an open‑source, daemon‑less container runtime, compares it with Docker, explains key architectural differences, and offers detailed instructions on installation, configuration, common commands, rootless usage, volume handling, and migration aliases.
This step‑by‑step guide shows how to create a React project, build Docker images using slimmer base images, multi‑stage builds, and Nginx, reducing the final image size from over a gigabyte to just a few megabytes while keeping the app functional.
This guide explains what MySQL binlog is, how to enable it in a Docker container, common binlog commands for inspection and maintenance, and demonstrates a step‑by‑step data recovery scenario using mysqlbinlog to restore a mistakenly dropped database.
This article explains what Uptime Kuma is, lists its key features, and provides detailed Docker‑based and manual installation instructions along with usage tips for adding monitors, configuring notifications, and running the service with PM2.
This guide walks through setting up Docker on a Windows or Linux host, enabling Nvidia GPU support via the Container Toolkit, pulling a TensorFlow GPU image, launching a Jupyter Notebook server inside the container, and connecting it to Google Colab for deep‑learning training.
This article introduces the open‑source Wiki.js platform, explains its features, and provides a step‑by‑step guide to install it on Linux using Docker Compose, including Docker‑compose installation, configuration files, container management, and optional HTTPS setup with Caddy.
This article walks through a real‑world case of a SpringBoot service whose message routing failed due to missing configuration, then demonstrates how to redesign the delivery workflow using a single Docker image, unified application.yaml, Helm charts, and CI/CD scripts to achieve environment‑agnostic, reliable deployments across development, staging, and production.
SingleFile is an open‑source browser extension and command‑line utility that lets you capture any web page—including images and resources—into one self‑contained HTML file, with support for Chrome, Firefox, Edge, and other major browsers, plus Docker and manual installation options.
This article provides a comprehensive overview of virtualization technology, covering its historical background, core concepts such as partitioning, isolation and encapsulation, various virtualization models including full, paravirtualization, hardware‑assisted approaches, and the evolution toward containerization with Docker and LXC.
This article examines how containers and Kubernetes Pods differ by diving into Linux namespaces, cgroups, and practical experiments that show how Pods share resources, how Docker can emulate Pod behavior, and why Pods are considered a higher‑level construct than simple containers.
This article provides a comprehensive introduction to virtualization technologies, covering historical background, full and half virtualization, hardware‑assisted virtualization, KVM‑QEMU, GPU and I/O virtualization, and container solutions such as LXC and Docker, while highlighting their roles in modern cloud computing.
This guide compiles twenty‑four common Docker problems—from oversized storage directories and disk‑space shortages to network misconfigurations, NFS lock errors, and container startup failures—providing clear explanations, step‑by‑step commands, and configuration tweaks to resolve each issue efficiently.
This tutorial walks through setting up a three‑host Linux environment, using Docker, sar, hping3, tcpdump and iptables to reproduce a SYN‑Flood DDoS attack, analyze its impact, and apply kernel and firewall tweaks to mitigate the attack.
This guide explains how to set up a private Anki synchronization server using the anki‑sync‑server Docker image, deploy it on a K3s cluster with a Kubernetes manifest, and configure desktop, Android, and iOS clients for fast, secure flashcard syncing without relying on the official server.
This article walks through migrating a two‑decade‑old C#/.NET university operating‑system project to .NET 6 using the .NET Upgrade Assistant, showing command‑line interactions, code adjustments, package updates, and how the final single‑file executable runs cross‑platform on Windows, Linux and Docker.
SingleFile is a cross‑browser extension and command‑line utility that lets users capture entire web pages—including images and resources—into a single HTML file, offering multiple installation methods, Docker support, detailed usage commands, and integration with custom user scripts.
