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Docker Documentation and Guides

website·Indexed 29 days ago

https://shangjundragon.netlify.app/

Comprehensive guides on Docker, covering quick start on CentOS 7, Dockerfile instructions (FROM, RUN, CMD, ENTRYPOINT, COPY, ADD, WORKDIR, ENV, ARG), image and container management commands, and Docker Compose. Includes advanced topics such as multi-stage builds, Docker Buildx for multi-platform builds, and deployment tutorials for MySQL 8.4.2 and Redis Sentinel and Cluster configurations.

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What's inside Docker

  1. Overview of Spring Cloud OpenFeign core features

    OpenFeign is a declarative HTTP client used to simplify remote calls between microservices. Its core capabilities include:

    • Declarative Interfaces: Define HTTP requests using annotations like @FeignClient(name="service-name") on interfaces and @GetMapping or @PostMapping on methods.
    • Service Discovery & Load Balancing: Integrates with registration centers (e.g., Eureka, Consul) and load balancers (e.g., Spring Cloud LoadBalancer) to resolve service instances.
    • Encoding/Decoding: Supports JSON by default via Jackson; extensible to XML or Protobuf.
    • Error Handling: Allows custom ErrorDecoder implementations to map non-2xx HTTP status codes to specific exceptions.
    • Logging & Monitoring: Provides configurable request/response logging for debugging.

  2. Overview of Cloudflare Tunnel for Intranet Penetration

    Cloudflare Tunnel allows developers to expose local services (e.g., Web apps, SSH) to the public internet without requiring a public IP address, manual firewall port forwarding, or Dynamic DNS (DDNS). It establishes an outbound connection from the local network to Cloudflare's edge nodes, providing automatic HTTPS (SSL/TLS certificates) and the ability to integrate Zero Trust Access policies for enhanced security.

  4. Overview of the Netty Network Application Framework

    Netty is an asynchronous, event-driven network application framework designed for the rapid development of maintainable, high-performance protocol servers and clients. It serves as a foundational networking layer for many major Java-based distributed systems, including Cassandra, Spark, Hadoop, RocketMQ, ElasticSearch, gRPC, Dubbo, Zookeeper, and the Spring 5.x Flux API (which uses Netty instead of Tomcat for its server side).

  5. Overview of the Corporate SSO Architecture

    The proposed SSO system uses a hub-and-spoke model where a central Identity Provider (IdP) manages master user identities and authenticates employees, while various company applications act as Service Providers (SP). The core link between the SSO system and individual applications is the Employee ID (工号), which allows the SSO system to provide a verified identity that the application then maps to its own local user record.

  6. Overview of the ALG Log Management Solution

    ALG is a modern, lightweight log management stack consisting of Grafana Alloy, Loki, and Grafana. It is designed for cloud-native environments and large-scale distributed systems, offering a lower-cost alternative to ELK by indexing only labels rather than full-text logs. The workflow follows a pipeline: Data Sources $\rightarrow$ Alloy (Collection & Processing) $\rightarrow$ Loki (Storage & Indexing) $\rightarrow$ Grafana (Visualization).

  8. Understand Spring Boot Auto-Configuration principles

    Spring Boot's auto-configuration follows the 'Convention over Configuration' philosophy. It uses the @SpringBootApplication composite annotation, specifically @EnableAutoConfiguration, to trigger the automatic assembly of Beans based on the dependencies present in the classpath.
    @SpringBootApplication
public class MyApplication {
    public static void main(String[] args) {
        SpringApplication.run(MyApplication.class, args);
    }
}

  9. Build a Go executable for Windows using a batch script

    Use a Windows batch script to configure the Go environment for Windows 64-bit architecture and compile a binary. The -ldflags "-w -s" flag is used to reduce binary size by stripping debug information, and -trimpath removes absolute paths from the binary. To hide the command prompt window when running the resulting GUI application, add -H=windowsgui to the -ldflags string.
    @echo off

setlocal

go env -w GOARCH=amd64
go env -w GOOS=windows

echo 构建exe中。。。

REM "-w -s -H=windowsgui" -H=windowsgui 去掉cmd窗口
go build -o ./target/go-app.exe -ldflags "-w -s" -trimpath ./main/main.go

if %errorlevel% neq 0 (
    echo Error: 构建失败!!!
    exit /b 1
) else (
    echo exe构建成功!!!
)

endlocal

  10. Advantages of Netty ByteBuf over Java ByteBuffer

    Netty's ByteBuf provides several architectural advantages over standard Java ByteBuffer:

    1. Pooling: Supports pooling to reuse instances, reducing memory fragmentation and GC pressure.
    2. Separated Pointers: Uses separate read and write pointers, eliminating the need to flip between read/write modes.
    3. Auto-Expansion: Can automatically expand its capacity as needed.
    4. Fluent API: Supports chainable method calls.
    5. Zero-Copy Support: Built-in support for zero-copy via slice(), duplicate(), and CompositeByteBuf.

  11. Determine your system architecture via CLI

    To find the correct architecture code for your current system, run one of the following commands in the terminal. Compare the output to the architecture codes (e.g., x86_64, aarch64, armhf) to select the correct software version.
    uname -m
# OR for Debian/Ubuntu specifically
dpkg --print-architecture

  12. Understand Vue Functional Components core concepts

    Functional components are a special type of component in Vue designed for high performance and low overhead. Their key characteristics include:

    • Stateless: They do not maintain their own reactive data.
    • No Instance: They have no this context.
    • Lightweight: They have lower rendering overhead than standard components.
    • Pure Functions: The output is determined entirely by the input (props).