Corsregistry.a的及代碼示例

本篇文章將從多個方面詳細闡述corsregistry.a，同時提供相應代碼示例。

一、什麼是corsregistry.a？

corsregistry.a是Docker Registry官方代理。它提供了對Docker Registry的訪問控制、路由、緩存和多棲支持。corsregistry.a使得Docker Registry在配置極其簡單的情況下變得更好的可用和高效。

二、corsregistry.a的優點

corsregistry.a的使用帶來了以下優點：

1、支持請求頻率限制和流量控制，有效的解決了Docker Registry的性能問題。

2、支持registry的緩存，可以降低registry的延遲。

3、支持多棲，可以同時支持多個registry，實現了高可用性。

三、如何使用corsregistry.a？

corsregistry.a的使用非常簡單，只需要在配置文件中加入corsregistry.a的域名和端口，同時正確地配置好證書即可。

version: '2'
services:
  registry:
    restart: always
    image: registry:2
    labels:
      - "traefik.enable=true"
      - "traefik.http.middlewares.registry.redirectscheme.scheme=https"
      - "traefik.http.middlewares.registry.redirectscheme.permanent=true"
      - "traefik.http.middlewares.registry.headers.forceSTSHeader=true"
      - "traefik.http.middlewares.registry.headers.STSSeconds=315360000"
      - "traefik.http.middlewares.registry.headers.STSIncludeSubdomains=true"
      - "traefik.http.middlewares.registry.headers.browserXSSFilter=true"
      - "traefik.http.middlewares.registry.headers.contentTypeNosniff=true"
      - "traefik.http.middlewares.registry.headers.SSLRedirect=true"
      - "traefik.http.middlewares.registry.headers.SSLHost=your.domain"
      - "traefik.http.middlewares.registry.headers.STSHeaderName=Strict-Transport-Security"
      - "traefik.http.middlewares.registry.headers.customResponseHeaders.X-Content-Type-Options=nosniff"
      - "traefik.http.services.registry.loadbalancer.server.port=5000"
      - "traefik.http.routers.registry.rule=Host(`your.domain`) && PathPrefix(`/v2/`)"
      - "traefik.http.routers.registry.entrypoints=websecure"
      - "traefik.http.routers.registry.middlewares=registry-redirect-to-https"
    volumes:
      - ./data:/var/lib/registry
  corsregistry:
    restart: always
    image: joxit/cors-registry-proxy:2.7.1
    environment:
      REGISTRIES__0__NAME: cors
      REGISTRIES__0__LOCATION: http://registry:5000
      REGISTRIES__0__CORS__ORIGINS__0: '*'
    labels:
      - "traefik.enable=true"
      - "traefik.http.middlewares.registry-redirect-to-https.redirectscheme.scheme=https"
      - "traefik.http.middlewares.registry-redirect-to-https.redirectscheme.permanent=true"
      - "traefik.http.middlewares.registry-redirect-to-https.headers.SSLRedirect=true"
      - "traefik.http.middlewares.registry-redirect-to-https.headers.SSLTemporaryRedirect=true"
      - "traefik.http.middlewares.registry-redirect-to-https.headers.STSIncludeSubdomains=true"
      - "traefik.http.middlewares.registry-redirect-to-https.headers.STSPreload=true"
      - "traefik.http.middlewares.registry-redirect-to-https.headers.STSSeconds=315360000"
      - "traefik.http.middlewares.registry-redirect-to-https.headers.forceSTSHeader=true"
      - "traefik.http.middlewares.registry-redirect-to-https.headers.STSHeaderName=Strict-Transport-Security"
      - "traefik.http.services.registry-secure.loadbalancer.server.port=8080"
      - "traefik.http.routers.registry-secure.rule=Host(`your.domain`) && PathPrefix(`/`)"
      - "traefik.http.routers.registry-secure.entrypoints=websecure"
    depends_on:
      - registry
    ports:
      - '127.0.0.1:5001:80'
    networks:
      - default

四、如何驗證corsregistry.a是否有效？

使用以下命令驗證是否使用了corsregistry.a：

$ curl -i https://your.domain/v2/

如果您的Docker Registry是可以允許跨域訪問的，您會得到下面的輸出：

HTTP/1.1 200 OK
Cache-Control: max-age=0
Content-Type: application/json; charset=utf-8
Docker-Distribution-Api-Version: registry/2.0
ETag: "0de2f61ecac4f2f96607a4a311ccfe53"
X-Content-Type-Options: nosniff
X-Frame-Options: SAMEORIGIN
X-Xss-Protection: 1; mode=block
Date: Thu, 16 Jul 2020 11:26:38 GMT
Content-Length: 2

{}

五、總結

本篇文章對corsregistry.a進行了全面的闡述，並提供了相應代碼示例。通過corsregistry.a對Docker Registry的優化，使得Docker Registry更加可用和高效，並且可以支持多個registry，實現高可用性。