Kong v0.10.0rc2 發布

jopen 7年前發布 | 9K 次閱讀 kong API通信 網關 Lua Apache Cassandra Nginx

 

Kong是在客戶端和（微）服務間轉發API通信的API網關，通過插件擴展功能。Kong有兩個主要組件：

  • Kong Server ：基于nginx的服務器，用來接收API請求。
  • Apache Cassandra ：用來存儲操作數據。

你可以通過增加更多Kong Server機器對Kong服務進行水平擴展，通過前置的負載均衡器向這些機器分發請求。根據文檔描述，兩個Cassandra節點就足以支撐絕大多數情況，但如果網絡非常擁擠，可以考慮適當增加更多節點。

對于開源社區來說，Kong 中最誘人的一個特性是可以通過插件擴展已有功能，這些插件在 API 請求響應循環的生命周期中被執行。插件使用 Lua 編寫，而且 Kong 還有如下幾個基礎功能：

  •  HTTP 基本認證
  •  密鑰認證
  •  CORS（ Cross-origin Resource Sharing，跨域資源共享）
  •  TCP/UDP
  •  文件日志
  •  API 請求限流
  •  請求轉發
  •  nginx 監控

更新日志

  •  Drop the dnsmasq dependency. We now internally resolve both A and SRV DNS records. #1587
  •  The SSL plugin has been removed and dynamic SSL capabilities have been added to Kong core, and are configurable via new properties on the API entity. See the related PR for a detailed explanation of this change. #1970
  • Bump the compatible OpenResty version to 1.11.2.1 and 1.11.2.2. Support for OpenResty1.11.2.2 requires the --without-luajit-lua52 compilation flag.
  • Maintain upstream connections pools which should greatly improve performance, especially for HTTPS upstream connections. We now use HTTP/1.1 for upstream connections as well as an nginx upstreamblock with a configurable keepalive directive, thanks to the new nginx_keepalive configuration property. #1587 #1827
  • Use an in-memory caching strategy for database entities in order to reduce CPU load during requests proxying. #1688
  • Provide negative-caching for missed database entities. This should improve performance in some cases. #1914
  • Separate Admin API and Proxy error logs. Admin API logs are now written to logs/admin_access.log.#1782
  •  Support for Cassandra 3.x. #1709
  •  SRV records resolution. #1587
  •  Load balancing. When an A or SRV record resolves to multiple entries, Kong now rotates those upstream targets with a Round-Robin algorithm. This is a first step towards implementing more load balancing algorithms. Another way to specify multiple upstream targets is to use the newly introduced/upstreams and /targets entities of the Admin API. #1587 #1735
  •  Multiple hosts and paths per API. Kong can now route incoming requests to your services based on a combination of Host headers, URIs and HTTP methods. See the related PR for a detailed explanation of the new properties and capabilities of the new router. #1970
  •  Websockets support. Kong can now upgrade client connections to use the ws protocol whenUpgrade: websocket is present. #1827
  • Support for serving the Admin API over SSL. This introduces new properties in the configuration file:admin_listen_ssl, admin_ssl, admin_ssl_cert and admin_ssl_cert_key. #1706
  • Plugins:
    •  New AWS Lambda plugin. Thanks Tim Erickson for his collaboration on this new addition.#1777 #1190
    • Anonymous authentication for auth plugins. When such plugins receive theconfig.anonymous=true property, even non-authenticated requests will be proxied by Kong, without the traditional Consumer headers, but with a X-Anonymous-Consumer header. #1666
    • request-transformer: Ability to change the HTTP method of the upstream request. #1635
    • jwt: Support for ES256 signatures. #1920
    • rate-limiting: Ability to select the Redis database to use via the new config.redis_databaseplugin property. #1941
  • Clarify the purpose of the cluster_listen_rpc property in the configuration file. Thanks Jeremy Monin for the patch. #1860
  • CLI:
    • Avoid double-prefixing migration error messages with the database name (PostgreSQL/Cassandra).
  • Plugins:
    • Fix fault tolerancy logic and error reporting in rate-limiting plugins.

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