[GitHub] [apisix] HelloBug0 opened a new issue #2547: doc(FAQ): add one item(how APISIX use etcd to update the configuration in milliseconds) in FAQ

[GitBox <gi...@apache.org>]

HelloBug0 opened a new issue #2547:
URL: https://github.com/apache/apisix/issues/2547


   Here is a FAQ(How APISIX use etcd to update the configuration in milliseconds) in Chinese.
   
   # APISIX利用etcd如何实现毫秒级别的配置同步
   etcd提供接口wait、waitdir接口用于监听指定关键字、目录是否发生变更，如果发生变更，返回更新的数据。
   
   以waitdir接口为例：
   `syntax: res, err = cli:waitdir(dir:string [, modified_index:uint [, timeout:uint] ])`
   其中timeout参数表示调用进程和etcd长连接的时间，值为0时表示无长连接。
   
   APISIX关于etcd长连接时间的配置如下：
   ```
   etcd:
     host:                           # it's possible to define multiple etcd hosts addresses of the same etcd cluster.
       - "http://127.0.0.1:2379"     # multiple etcd address
     prefix: "/apisix"               # apisix configurations prefix
     timeout: 30                     # 30 seconds
   ```
   APISIX使用waitdir接口监视目录的变更，timeout默认配置为30秒，即APISIX调用进程和etcd保持30秒的长连接。
   
   若APISIX进程调用该函数时，监听的目录没有更新，函数直接返回，长连接保持，调用进程可处理其他事件。30秒内有数据更新，etcd通过该函数返回更新结果，调用进程处理更新数据，30秒内无数据返回，到达超时时间30秒时，etcd通过该函数返回一条超时消息，调用进程处理超时信息，然后再次调用waitdir函数监听指定目录。APISIX通过以上过程实现配置的实时更新。


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[GitHub] [apisix] spacewander closed issue #2547: doc(FAQ): add one item(how APISIX use etcd to update the configuration in milliseconds) in FAQ

[GitBox <gi...@apache.org>]

spacewander closed issue #2547:
URL: https://github.com/apache/apisix/issues/2547


   


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[GitHub] [apisix] spacewander commented on issue #2547: doc(FAQ): add one item(how APISIX use etcd to update the configuration in milliseconds) in FAQ

[GitBox <gi...@apache.org>]

spacewander commented on issue #2547:
URL: https://github.com/apache/apisix/issues/2547#issuecomment-720869804


   Solved by #2582 


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[GitHub] [apisix] membphis commented on issue #2547: doc(FAQ): add one item(how APISIX use etcd to update the configuration in milliseconds) in FAQ

[GitBox <gi...@apache.org>]

membphis commented on issue #2547:
URL: https://github.com/apache/apisix/issues/2547#issuecomment-717968492


   welcome to submit it by PR ^_^


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