360’s Doraemon monitoring platform extends Prometheus with a rule engine, alert gateway and web UI, offering dynamic rule loading, label‑based routing, aggregation, maintenance groups, and both Docker‑Compose and Kubernetes deployments, all open‑sourced on GitHub.
This guide explains Docker's two log types, how to locate engine logs on various Linux distributions, how to use the docker logs command, and provides detailed configuration examples for each Docker log driver—including local, json‑file, syslog, and journald—plus strategies for handling file‑based container logs in production environments.
This guide explains why Docker images become large, identifies the three main factors—base image size, Dockerfile layer count, and application JAR size—and demonstrates how to use Spring Boot's layered packaging and Dockerfile tricks to reduce image size from megabytes to a few kilobytes.
Although Docker offers many benefits for application deployment, this article outlines seven key reasons—including data safety, performance, networking, statefulness, resource isolation, cloud platform incompatibility, and environmental requirements—that make containerizing databases problematic and suggest careful consideration before using Docker for database workloads.
This article explains Docker’s four network drivers (bridge, host, none, overlay), details how the bridge driver creates the docker0 bridge and veth pairs, shows port‑mapping with -p/-P, then covers Kubernetes pod communication patterns, CNI plugins, and provides a step‑by‑step guide to deploying and configuring Flannel with different backends such as vxlan, host‑gw and directrouting.
This article explains how virtualization technology—ranging from early hypervisors and Popek‑Goldberg requirements to hardware‑assisted extensions, KVM‑QEMU, and lightweight container solutions like Docker and Firecracker—forms the foundation of modern cloud computing, detailing its evolution, mechanisms, and trade‑offs.
Learn how to create a simple interactive cat‑themed canvas game for mobile browsers using Go compiled to WebAssembly, covering environment setup with Docker, Go code for DOM manipulation, event handling, rendering, audio, and deployment, while explaining WASM concepts and differences from Service and Web Workers.
This article explores the evolution of virtualization technology—from its theoretical foundations and early hypervisor designs to full and para-virtualization, hardware-assisted extensions, and lightweight solutions like containers and microVMs—explaining key concepts, architectures, and their roles in modern cloud computing.
This guide walks you through creating a Python Flask project, manually building and running its Docker image, configuring GitLab runners, writing a .gitlab-ci.yml pipeline for style checks, tests, deployment, and release, and managing a private Docker registry for versioned releases.
This tutorial walks through installing Java (JRE/JDK), setting JAVA_HOME, installing Jenkins via apt or Docker, configuring Jenkins service and Nginx reverse proxy, handling common timezone and permission errors, and resetting the admin password, providing complete commands and configuration snippets for a functional CI/CD setup on Ubuntu.
This guide explains the fundamentals of Continuous Integration (CI), compares popular CI tools like Jenkins and GitLab CI, and provides detailed, cross‑platform instructions for installing Docker, setting up GitLab‑CI runners, configuring permissions, and registering runners with various token types for seamless automated builds.
This guide explains how to perform interface testing using Robot Framework, set up the required environment, design test cases for order placement, integrate the tests into Jenkins CI/CD pipelines, expose them via a Flask API, containerize with Docker, and deploy the solution on Kubernetes.
This article describes a DevOps‑based continuous deployment practice that integrates project management, code, image, and configuration handling with tools such as Bitbucket, Jenkins, Docker, Harbor, and Kubernetes to achieve automated, one‑click deployments for development and test environments.
This extensive tutorial explains Linux containers and Docker fundamentals, compares containers with virtualization, outlines Docker's history, demonstrates installation steps, covers essential Docker commands, image lifecycle management, Dockerfile creation, container networking options, Docker Compose orchestration, private registry setup, Harbor deployment, and best practices for production use.
This article provides a comprehensive introduction to Docker, covering its origins from LXC, core concepts such as images, containers, and registries, detailed architecture components like client, daemon, engine, graph and drivers, and practical command‑line examples for installation, image management, container execution, and troubleshooting.
This guide walks you through building a production‑ready ELK log collection system using Docker‑Compose, configuring Logback to route debug, error, business, and record logs, setting up Logstash pipelines, and leveraging Kibana for powerful log visualization in SpringBoot applications.
Learn how to package a Spring Boot application into a Docker image using three Maven plugins—spring-boot-maven-plugin's build-image, Google's jib-maven-plugin, and the dockerfile-maven-plugin—complete with setup steps, command examples, and tips for container testing.
This article explains how an expired AddTrust External CA Root caused HTTPS requests to Sentry to fail, shows how to reproduce the error with curl and OpenSSL, and provides step‑by‑step fixes for Ubuntu, Docker‑Alpine, and macOS environments.
This article provides a comprehensive, hands‑on tutorial for installing GitLab on a CentOS 7 server and via Docker, covering prerequisite setup, dependency installation, repository configuration, SSL handling, service startup, first‑login procedures, and common troubleshooting tips.
This guide walks you through running Jenkins in Docker, unlocking and configuring it, creating development and production Git branches, writing a Jenkinsfile with build, test, deliver and deploy stages, and executing the pipeline for both environments using Blue Ocean.
This step‑by‑step guide shows how to use Docker on CentOS 7 to pull MySQL 5.7 images, configure master and slave my.cnf files, run containers, set up replication, and verify that a test database created on the master is automatically synchronized to the slave.
This article traces the evolution from early virtualization challenges to modern container technologies, explaining how LXC laid the groundwork for Docker, how Docker differs from virtual machines, and why containers have become essential for cloud‑native development and DevOps workflows.
This article provides a comprehensive, step‑by‑step tutorial on creating a Redis Cluster using Docker, covering the preparation of a base Redis image, building node images, configuring cluster settings, assigning hash slots, adding replica nodes for high availability, testing failover, and solving network connectivity issues for production deployments.
This comprehensive guide explains Linux containers, their differences from traditional virtualization, the evolution of Docker, core Docker commands, Dockerfile creation, image layering, private registries, docker‑compose orchestration, network modes, HAProxy load balancing, and best practices for secure and efficient container deployment.
Learn three primary methods to create Docker images—committing from an existing container, importing a local template, and building from a Dockerfile—through step‑by‑step commands, code examples, and practical testing to ensure your custom images work as expected.
This comprehensive guide walks you through Linux containers, Docker fundamentals, installation, command‑line usage, image lifecycle, Dockerfile creation, registry setup (including authentication), Docker Compose orchestration, networking options, restart policies, Harbor deployment, best practices, and monitoring techniques.
This tutorial walks you through installing RabbitMQ on Windows and Linux, configuring it, and using Spring AMQP to implement five fundamental messaging patterns—simple, work, publish/subscribe, routing, and wildcard—complete with code examples and test endpoints.
This guide explains what a Docker repository is, why private registries are needed, and provides step‑by‑step instructions to set up a local registry, push images, resolve HTTPS errors, and pull images from other hosts.
This article provides a comprehensive guide to Linux containers and Docker, covering their fundamentals, differences from traditional virtualization, historical background, Docker architecture, installation steps, essential commands, image lifecycle, container management, volume handling, Dockerfile creation, Docker‑Compose orchestration, HAProxy integration, and various Docker networking modes.
This article walks beginners through the full process of preparing a Kubernetes environment and deploying both PHP (WordPress) and Java (Tomcat) web applications, covering image creation, namespace setup, secrets, deployments, services, ingress configuration, and host binding.
This comprehensive guide walks you through Docker container fundamentals, covering creation, starting, stopping, executing commands inside, removal, import/export for migration, inspection, real‑time monitoring, and file copying between host and container, all with clear examples and command syntax.
This article details how Tubi built the Tubi Data Runtime platform on JupyterHub using Kubernetes, covering authentication with Okta SSO, custom Docker images, shared EFS storage, multi‑service support, GPU enablement, node affinity, cluster autoscaling, and monitoring with Prometheus.
This article provides a comprehensive guide to Docker images, covering core concepts, image sources, essential commands for searching, pulling, tagging, inspecting, pruning, exporting, importing, and pushing images, along with practical examples and tips for effective container image management.
This article explains why HashiCorp's restrictions on its enterprise products in China prompt a migration from Consul to Nacos, compares dual‑registration and Nacos‑Sync approaches, and provides a complete Docker‑based demo showing how to configure, run, and verify bidirectional service synchronization using Nacos‑Sync in a Spring Cloud environment.
This tutorial explains how to create a custom MySQL Docker image that automatically runs .sql, .sh, or .sql.gz initialization scripts on first container start, covering the underlying mechanism, Dockerfile steps, image build, container run, and verification tips.
This article introduces the community‑maintained r/SpaceX REST API that aggregates every SpaceX rocket datum, explains how to query it via JSON in multiple languages, provides a Python example, and details Docker, local, and Postman deployment options for developers.
This article explains why Docker containers may need around ten seconds to stop, covering missing init processes, unhandled SIGTERM signals, and practical Dockerfile adjustments such as using exec‑form ENTRYPOINT, adding signal traps, or employing a lightweight init like tini.
This guide shows how to run a Dockerized FTP server, configure its network and ports, install the PHP ftp-client library, and use PHP code to upload and download files through the containerized service.
This guide walks through installing Jenkins Blue Ocean via Docker, setting up the Jenkins home directory, launching the server, and creating pipelines using both the classic Jenkins UI with a declarative Jenkinsfile and the visual Blue Ocean plugin, covering configuration, triggers, stages, and artifact handling.
GCLI, a Docker‑driven command‑line tool created by Xianyu, unifies Flutter‑based serverless FaaS development by providing consistent, cross‑OS environments and simple commands for hot‑deploy, invocation, logging, and local debugging, cutting deployment time from ten minutes to five seconds and lowering entry barriers to about thirty minutes.
This guide details a complete GitLab‑based CI/CD workflow—from issue creation and feature‑branch handling through build, test, code‑analysis, Docker image creation, and Kubernetes deployment—illustrating pipeline configuration, variable management, and trigger rules for reliable end‑to‑end project delivery.
This guide walks through preparing the environment, installing required tools, configuring firewalls, setting up host files, deploying Nginx with Keepalived for high‑availability, installing Docker, MySQL, and finally installing K3s and Rancher using Helm, including certificate creation and troubleshooting steps.
This article provides a step‑by‑step guide on installing Jenkins Blue Ocean via Docker, creating pipelines using both the classic UI and the Blue Ocean visual plugin, and configuring pipeline stages, triggers, and environment variables with example Groovy scripts.
This guide explains how to reduce Docker image size by separating Spring Boot application classes from third‑party libraries into distinct layers, using the Maven plugin and layertools, resulting in rebuilds that change only a few kilobytes instead of megabytes.
This tutorial demonstrates how to rapidly set up and use HBase inside a Docker container, covering Docker installation, image pulling, container execution, host configuration, accessing the HBase Web UI and shell, Zookeeper interaction, and a Java API example for beginners.
This article walks you through half‑automatic and fully automated deployment of a SpringBoot application using Docker, a custom Bash script, and Jenkins, covering project packaging, Dockerfile creation, script details, Jenkins SSH publishing, and practical tips for reliable CI/CD pipelines.
This article explains practical techniques for drastically reducing Docker image sizes—including Go binary static linking, Alpine vs. slim base images, multi‑stage builds for Java, Rust, and interpreted languages, and detailed size comparisons—so developers can choose the optimal base image and build strategy for any language.
Learn how to automate the packaging, Docker image creation, and remote deployment of a SpringBoot application using a semi‑automatic script and Jenkins, covering Dockerfile setup, Bash deployment scripts, Jenkins Publish Over SSH configuration, and best practices for reliable production releases.
This guide walks through setting up a private Kubernetes environment, configuring namespaces and service accounts, modifying Eureka for IP registration, preparing Docker and Harbor authentication, creating StatefulSet and Service manifests, and automating continuous deployment with a Python script, enabling a fully functional Spring Cloud Eureka service in a resource‑constrained cluster.
This guide walks through setting up a complete CI/CD pipeline for a SpringBoot micro‑services project using Jenkins, Docker, Harbor, GitLab, and Python scripts to build, package, and deploy containers onto a Kubernetes cluster, covering environment installation, configuration, and testing steps.
Spring Boot 2.3 introduces major core component upgrades—including Spring Data Neumann, Spring HATEOAS 1.1, and Spring Security 5.3—adds Java 14 compatibility while retaining Java 8/11 support, enhances Docker integration with Cloud Native Buildpacks and layered jars, and provides graceful shutdown and health‑probe features for improved application reliability.
This guide walks you through selecting an open‑source cloud storage solution, installing Docker, deploying Nextcloud, configuring WebDAV, accessing the service from PC and mobile, and exploring plugins, providing step‑by‑step commands and screenshots to help you set up a secure private cloud drive.
This article details how Tongcheng‑eLong transitioned from Docker‑Host deployments to a Kubernetes‑based platform for hundreds of storage and compute services, covering network integration, IP management, service synchronization, storage strategies, operator development, monitoring, logging, and the challenges and future plans they encountered.
Through a business‑growth narrative, this article explains why Kubernetes emerged, how its core components work together, and why front‑end engineers should care about container orchestration, providing a concise, entry‑level overview of cloud‑native infrastructure.
This article analyzes Docker's declining market share and provides a detailed comparison of alternative container runtimes—including rkt, Mesos, LXC, OpenVZ, and Containerd—highlighting their features, advantages, and limitations for various production scenarios.
This article explains the concept of cloud native, tracing its origins from the CNCF foundation and early container technologies, and details key components such as containers, Docker, Kubernetes, microservices, service mesh, immutable infrastructure, and declarative APIs, highlighting how they together enable rapid iteration, automated deployment, and scalable, resilient applications.
This tutorial walks through building a Spring Cloud micro‑service platform by preparing the development environment, adding backend menus, auto‑generating Vue pages, configuring Spring Cloud Gateway routing, registering services with Nacos, and solving CORS issues to enable seamless frontend‑backend interaction.
This article provides a comprehensive guide to Spring Cloud Gateway, covering its role as an API gateway, core features, underlying principles, step‑by‑step module creation, Maven dependency configuration, application annotations, YAML routing examples, and a runnable demo for building cloud‑native microservice architectures.
Discover five powerful Docker utilities—Watchtower, docker‑gc, docker‑slim, Rocker, and ctop—that automate container updates, clean up unused images, shrink image sizes, enhance Dockerfile capabilities, and provide real‑time container monitoring, each with installation steps, usage examples, and links to their documentation.
This guide walks through setting up Nacos as a service discovery platform for a Spring Cloud microservice architecture, covering dependency inclusion, server installation, configuration of each service’s address, enabling discovery annotations, naming services, and accessing the Nacos dashboard, with full code snippets and troubleshooting tips.
This article details how to replace VM‑based Jenkins slaves with dynamically provisioned Kubernetes pods, covering architecture design, Jenkins master configuration, pod template YAML, custom Docker images, pipeline scripts, and performance tuning to improve resource utilization and scaling.
This article explains why naïve Docker images can balloon to gigabytes, then walks through multi‑stage builds, language‑specific trimming techniques, and the use of minimal base images such as scratch, showing how to reduce image size from over a gigabyte to just a few megabytes while preserving developer and operations convenience.
This guide walks you through deploying a low‑cost, private Bitwarden password manager on Tencent Cloud by preparing a domain and SSL certificate, installing Docker on a CentOS CVM, running Bitwarden and Nginx containers, optionally enabling CDN, configuring backups to COS, and applying security hardening such as two‑factor authentication.
This article walks through the complete process of moving a project to a Kubernetes platform, covering image creation, pod controller management, data persistence, service exposure, external publishing, CI/CD integration, and detailed command‑line examples for building, pushing, and deploying Docker images.
This tutorial walks through downloading the Renren‑Fast open‑source admin framework, integrating it into the PassJava project, configuring MySQL and Docker, adjusting application settings, launching the backend service, building the Vue front‑end, and performing end‑to‑end login verification, providing a complete step‑by‑step guide for developers.
This article explains Docker's core concepts—including images, containers, the union file system, and the differences between image layers and running containers—while walking through essential Docker commands and illustrating each step with clear diagrams and code examples.
This article explains Sentinel's role in microservice rate limiting, details a Docker-specific bug where CPU utilization is incorrectly reported, clarifies the difference between CPU load and utilization, and outlines the code fix and its remaining limitations.
This tutorial walks through pulling the Redis Docker image, creating configuration files, running the container, connecting with redis-cli, testing commands, enabling persistence, and installing a visual management tool, providing complete step‑by‑step instructions for Docker‑based Redis deployment.
This tutorial explains how to download the MySQL Docker image, create and run a MySQL container with volume mappings and environment variables, verify the container, connect to the database via Workbench, and access the container’s shell and host files.
This technical guide explains how to build a Vue SSR service using Koa, outlines the project benefits and trade‑offs, details the directory structure, server and client entry files, webpack configurations, and describes a Docker‑based CI/CD pipeline with Kubernetes deployment for scalable production environments.
This guide walks through preparing a CentOS 7 host, installing Docker, configuring a Zabbix server and MySQL containers, and optionally using docker‑compose to set up Zabbix components, including the web UI and agent, with detailed commands and volume mappings for persistent monitoring.
This article walks through the benefits, trade‑offs, and step‑by‑step implementation of Vue server‑side rendering using Koa, then shows how to containerize the service with Docker and automate deployment with Kubernetes, covering code, configuration, and common pitfalls.
This article provides a thorough overview of planning, provisioning, and managing online production environments—including user sizing, bandwidth estimation, database design, OS versus container deployment, middleware selection, security, monitoring, SSH shortcuts, file transfer tools, automation scripts, Docker setup, and log viewing techniques—aimed at giving developers a complete operational perspective.
This article explains Docker's two log categories—engine logs and container logs—covers how to view them, details the available log drivers with their options, and presents practical methods for storing container logs in production systems.
This guide walks you through setting up a six-node Redis cluster using Docker Compose, configuring the necessary redis.conf settings, deploying the containers, initializing the cluster, and then integrating the cluster into a SpringBoot application via appropriate application.yml configurations and connection commands.
This article examines the origins, principles, advantages, and drawbacks of microservice architecture, outlines when it should be adopted, describes its evolution stages, presents design patterns, service‑splitting strategies, and reviews popular frameworks and tools to help teams decide if microservices fit their system complexity and organizational capabilities.
This guide introduces Pig4Cloud’s custom Spring Initializr, explains why it outperforms start.spring.io and start.aliyun.com, details usage steps, highlights enhancements such as .gitignore, .editorconfig, yml defaults, Maven test inclusion, and provides Docker deployment instructions for rapid backend project setup.
This article introduces Elasticsearch by explaining its core concepts such as indices, types, documents, mappings, and Query DSL, demonstrates common use cases, and provides step‑by‑step instructions for creating, updating, viewing, and deleting indices and documents using RESTful APIs, curl commands, and Docker‑compose deployment.
This guide walks through preparing a CentOS 7.6 host, generating self‑signed certificates, installing Docker CE, configuring a Docker registry mirror, downloading and installing Harbor, and demonstrates how to push, scan, sign, and pull images while troubleshooting common issues.
This article walks you through building an OpenStack Stein cloud on a single host using Kolla, covering environment preparation, Docker and Ansible setup, configuration files, password generation, deployment commands, and final login verification, all with detailed code snippets and images.
This comprehensive guide covers essential Linux fundamentals, common interview questions, and practical server administration techniques, including boot sequences, runlevels, file system differences, process management, packaging tools, Nginx optimization, MySQL replication, Docker usage, and useful shell scripts for real‑world operations.
This tutorial explains Docker's data management techniques, covering the concepts and hands‑on steps for using volumes and bind mounts, how to back up logs and MongoDB data, and how to restore them, providing a complete guide for reliable container data handling.
This tutorial walks through building a production‑grade Kubernetes cluster on CentOS by provisioning five virtual machines, configuring networking and DNS, generating TLS certificates with cfssl, installing Docker, setting up a private Harbor registry, and deploying core Kubernetes components such as etcd, kube‑apiserver, controller‑manager, scheduler, kubelet and kube‑proxy with full supervision and health checks.
This guide shows how to containerize an Nginx‑RTMP live‑streaming service with Docker, add customizable watermarks, and split the stream to two cloud providers—one with watermark and one without—using ffmpeg, SSL, and HLS playback.
This article provides a comprehensive, step‑by‑step tutorial for building, containerizing, and deploying a Spring Cloud microservice project on a Kubernetes cluster, covering environment preparation, Maven builds, Docker image creation, YAML orchestration, and verification of the frontend portal.
Meituan's security team explains cloud‑native architecture, outlines container‑escape threats from kernel bugs, vulnerable runtimes and misconfigurations, and recommends mitigation through hardened kernels, secure‑container runtimes like gVisor or Kata, rigorous patch management, and collaborative feature development to strengthen runtime protection.
This guide explains branch development strategies, naming conventions, Dockerfile creation, image building and publishing, as well as automated Harbor image cleanup using Jenkins pipelines, providing a comprehensive workflow for managing container images in a cloud‑native environment.
This article provides a comprehensive explanation of Docker’s architecture, detailing the differences between images and containers, the role of the union file system, and how various Docker commands such as create, start, run, ps, and build operate on these layers.
This tutorial explains how to set up Docker‑in‑Docker for Jenkins, mount the Docker socket, run containers as root, and create multi‑stage pipelines that use different Docker images for Maven and Node builds, including troubleshooting tips.
This guide explains how to deploy Jenkins using Docker, set up both static and dynamic Docker‑based slaves, configure plugin sources, adjust certificates, and fine‑tune Docker Cloud settings for reliable CI/CD pipelines.
This step‑by‑step guide shows how to install Docker CE on CentOS, pull the Nextcloud image, run the container with proper volume and port mappings, configure firewall and security groups, and finally access the web interface to set up a fully functional private cloud storage solution.
This article explains what Jenkins and pipelines are, then guides you through installing Docker, running a Jenkins container, retrieving the initial admin password, and completing the Jenkins setup via the web interface, including plugin installation and user creation.
During the COVID‑19 pandemic, the mall development team adopted a comprehensive DevOps toolchain—including JIRA, GitLab, Jenkins, Sonar, Docker, and Wiki—to enable end‑to‑end remote development, automated pipelines, and continuous delivery, resulting in improved efficiency, reliable releases, and seamless collaboration.
The 2020 JRebel Java technology report reveals that Java 8 dominates usage, Tomcat remains the leading application server, Spring Boot is the preferred framework, IntelliJ IDEA tops IDE preferences, PostgreSQL and Oracle lead databases, Gradle slightly outpaces Maven, Docker is the most common container tool, and microservices continue to shape technology choices.
This guide explains how to use Jenkinsfile Runner to execute Jenkins pipelines locally via the command line or Docker, covering prerequisite downloads, building the runner, command‑line options, a sample Jenkinsfile, and tips on plugin management for efficient testing.
This guide walks through setting up a complete development and automated deployment stack on a fresh CentOS server, using Docker with Laradock for PHP testing, GitLab for source control, and Jenkins for CI/CD, including detailed command examples, configuration parameters, and plugin setup.
This guide explains how to set up a Jenkins instance with a domestic update mirror by customizing a Docker image, adjusting environment variables, copying certificates, and modifying update‑center URLs to improve plugin download speed in China.
This article introduces the fundamentals of serverless architecture, explains how Docker containers and Kubernetes orchestration enable dynamic scaling, and outlines various autoscaling mechanisms and scenarios for elastic resource management in modern cloud-native applications.
Postwoman (now Hoppscotch) is a free, open‑source, browser‑based API testing tool that offers a lightweight UI, real‑time responses, and extensive features such as method support, validation, WebSocket testing, and Docker deployment, making it a practical alternative for web developers.
This guide explains how to deploy Nexus with Docker, define component concepts, configure Maven settings, and use Jenkins pipelines—both script‑based and Nexus plugin—to upload and publish artifacts to Nexus and Artifactory, including API scripts and naming conventions for repository management.
