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| |
| <h1 id="rest-over-http2">REST over Http2</h1> |
| <h2 id="_1">场景描述</h2> |
| <p>用户通过简单的配置即可启用Http2进行通信,提高性能。</p> |
| <h2 id="_2">外部服务通信配置</h2> |
| <p>与外部服务通信相关的配置写在microservice.yaml文件中。</p> |
| <ul> |
| <li> |
| <p>启用h2(Http2 + TLS)进行通信<br /> |
| 服务端在配置服务监听地址时,可以通过在地址后面追加<code>sslEnabled=true</code>开启TLS通信,具体介绍见<a href="../security/tls.html">使用TLS通信</a>章节。然后再追加<code>protocol=http2</code>启用h2通信。示例如下:</p> |
| <pre><code>servicecomb: |
| rest: |
| address: 0.0.0.0:8080?sslEnabled=true&protocol=http2 |
| </code></pre> |
| </li> |
| <li> |
| <p>启用h2c(Http2 without TLS)进行通信<br /> |
| 服务端在配置服务监听地址时,可以通过在地址后面追加<code>protocol=http2</code>启用h2c通信。示例如下:</p> |
| <pre><code>servicecomb: |
| rest: |
| address: 0.0.0.0:8080?protocol=http2 |
| </code></pre> |
| </li> |
| <li> |
| <p>客户端会通过从服务中心读取服务端地址中的配置来使用http2进行通信。 </p> |
| </li> |
| </ul> |
| <h2 id="http2-server">http2 server 端配置项</h2> |
| <table> |
| <thead> |
| <tr> |
| <th>配置项</th> |
| <th>默认值</th> |
| <th>含义</th> |
| <th>注意</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td>servicecomb.rest.server.http2.useAlpnEnabled</td> |
| <td>true</td> |
| <td>是否启用 ALPN</td> |
| <td></td> |
| </tr> |
| <tr> |
| <td>servicecomb.rest.server.http2.concurrentStreams</td> |
| <td>100</td> |
| <td>一条连接中,同时支持的最大的stream并发量</td> |
| <td>以server端的concurrentStreams和client端的multiplexingLimit较小值为准</td> |
| </tr> |
| <tr> |
| <td>servicecomb.rest.server.http2.HeaderTableSize</td> |
| <td>4096</td> |
| <td></td> |
| <td></td> |
| </tr> |
| <tr> |
| <td>servicecomb.rest.server.http2.pushEnabled</td> |
| <td>true</td> |
| <td></td> |
| <td></td> |
| </tr> |
| <tr> |
| <td>servicecomb.rest.server.http2.initialWindowSize</td> |
| <td>65535</td> |
| <td></td> |
| <td></td> |
| </tr> |
| <tr> |
| <td>servicecomb.rest.server.http2.maxFrameSize</td> |
| <td>16384</td> |
| <td></td> |
| <td></td> |
| </tr> |
| <tr> |
| <td>servicecomb.rest.server.http2.maxHeaderListSize</td> |
| <td>Integer.MAX_VALUE</td> |
| <td></td> |
| <td></td> |
| </tr> |
| <tr> |
| <td>servicecomb.Provider.requestWaitInPoolTimeout${op-priority}</td> |
| <td>30000</td> |
| <td>在同步线程中排队等待执行的超时时间,单位为毫秒</td> |
| <td></td> |
| </tr> |
| <tr> |
| <td>servicecomb.rest.server.requestWaitInPoolTimeout</td> |
| <td>30000</td> |
| <td>同servicecomb.Provider.requestWaitInPoolTimeout${op-priority}, 该配置项优先级更高。</td> |
| <td></td> |
| </tr> |
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