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| <h1 id="_1">服务监听地址和发布地址</h1> |
| <h3 id="_2">概念阐述</h3> |
| <p>在JavaChassis中，服务的监听地址和发布地址是两个独立的概念，可以独立配置：</p> |
| <ul> |
| <li>监听地址：指微服务实例启动时监听的地址。该配置项决定了可以通过哪些IP访问此服务。</li> |
| <li>发布地址：指微服务实例注册到服务中心的地址。其他的微服务实例会通过服务中心获取此实例的信息，根据发布地址访问此服务实例，所以该配置项决定了其他服务实际上会使用哪个IP访问此服务。</li> |
| </ul> |
| <h3 id="_3">场景描述</h3> |
| <p>用户通过配置服务的监听地址和发布地址来确定服务实例监听的IP和其他服务实例访问本实例时请求的IP。</p> |
| <h3 id="_4">配置说明</h3> |
| <p>服务监听地址的配置项是<code>servicecomb.rest.address</code>和<code>servicecomb.highway.address</code>，分别对应rest传输方式和highway传输方式的监听地址。两者的配置规则相同，以下仅以<code>servicecomb.rest.address</code>作为说明。<br /> |
| 服务发布地址的配置项是<code>servicecomb.service.publishAddress</code>，该地址<strong>可以不配置</strong>。不配置此项时JavaChassis会根据特定的规则选取发布地址。</p> |
| <p><strong>表1 服务发布地址生效规则</strong></p> |
| <table> |
| <thead> |
| <tr> |
| <th align="left">规则编号</th> |
| <th align="left">监听地址配置</th> |
| <th align="left">发布地址配置</th> |
| <th align="left">实际生效的发布地址</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td align="left">1</td> |
| <td align="left">127.0.0.1</td> |
| <td align="left">-</td> |
| <td align="left">127.0.0.1</td> |
| </tr> |
| <tr> |
| <td align="left">2</td> |
| <td align="left">0.0.0.0</td> |
| <td align="left">-</td> |
| <td align="left">选取一张网卡的IP地址作为发布地址。<br/>要求该地址不能是通配符地址、回环地址或广播地址</td> |
| </tr> |
| <tr> |
| <td align="left">3</td> |
| <td align="left">具体IP</td> |
| <td align="left">-</td> |
| <td align="left">与监听地址一致</td> |
| </tr> |
| <tr> |
| <td align="left">4</td> |
| <td align="left">*</td> |
| <td align="left">具体IP</td> |
| <td align="left">与发布地址配置项一致</td> |
| </tr> |
| <tr> |
| <td align="left">5</td> |
| <td align="left">*</td> |
| <td align="left">"{网卡名}"</td> |
| <td align="left">指定网卡名的IP，注意需要加上引号和括号</td> |
| </tr> |
| </tbody> |
| </table> |
| <blockquote> |
| <p><strong>说明：</strong> |
| - 服务实例实际监听的地址始终与监听地址配置项保持一致。 |
| - 使用网卡名配置发布地址时，要求使用双引号包裹住网卡名占位符，否则会造成解析配置报错。 |
| - 网卡名必须是主机存在的网卡。</p> |
| </blockquote> |
| <h3 id="_5">示例代码</h3> |
| <p>microservice.yaml文件的配置示例如下：</p> |
| <pre><code class="language-yaml">servicecomb: |
| service: |
| publishAddress: "{eth0}" # 注册到服务中心的发布地址会是eth0网卡的IP |
| rest: |
| publishPort: 8888 # 发布地址端口，不配置默认与监听地址端口一致 |
| address: 0.0.0.0:8080 # 监听主机的全部网卡IP |
| highway: |
| publishPort: 8888 # 发布地址端口，不配置默认与监听地址端口一致 |
| address: 0.0.0.0:7070 # 监听主机的全部网卡IP |
| </code></pre> |
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