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<h2 id="differ-structure-multi-service-center-synchronization-tool">Differ-structure, multi-service center synchronization tool</h2>
<p>Syncer is a multiple servicecenters synchronization tool designed for large microservice architectures,supporting differ-structure servicecenters.</p>
<h2 id="quick-start">Quick Start</h2>
<p>1 Getting &amp; Running Service center</p>
<p>Take Service-center as an example, reference to <a href="/docs/products/service-center/install/">Install ServiceCenter</a></p>
<ol>
<li>Download and decompression <a href="/release/service-center-downloads/">ServiceCenter发布包(&gt;=1.3.0)</a>
<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c"># 解压tar包</span>
<span class="nv">$ </span><span class="nb">tar</span> <span class="nt">-zxvf</span> apache-servicecomb-service-center-1.3.0-linux-amd64.tar.gz
<span class="nv">$ </span><span class="nb">cd </span>apache-servicecomb-service-center-1.3.0-linux-amd64/
</code></pre></div> </div>
</li>
</ol>
<h5 id="33-running-servicecenter-syncer">3.3 Running ServiceCenter Syncer</h5>
<h6 id="parameter-description">Parameter Description</h6>
<ul>
<li>
<p>node</p>
<p>The member name of syncer, that must be unique in the cluster</p>
</li>
<li>
<p>sc-addr</p>
<p>Service center address, which is the service registry address. Cluster mode is supported, and multiple addresses are separated by commas.</p>
</li>
<li>
<p>bind-addr</p>
<p>P2P address of Syncer for communication with other Syner members in P2P networks by Gossip.</p>
</li>
<li>
<p>rpc-addr</p>
<p>Address of Syncer for data transmission, used to synchronize microservices data between Syncers.</p>
</li>
<li>
<p>join-addr</p>
<p>The bind-addr of target syncer, one of other syncer members, the current Syncer will join the network by this.</p>
</li>
<li>
<p>mode</p>
<p>Runtime mode of Syncer, specify ‘cluster’ for cluster mode which enables each Syncer to have three instance, default to ‘single’ mode.</p>
</li>
<li>
<p>cluster-name</p>
<p>Name of the Syncer cluster when mode is set to be ‘cluster’.</p>
</li>
<li>
<p>cluster-port</p>
<p>The port that the Syner cluster members communicate with when mode is set to be “cluster”.</p>
</li>
</ul>
<p>Suppose there are 2 Service centers, each of them with a Service-center cluster for microservices discovery and registry, as following,</p>
<table>
<thead>
<tr>
<th style="text-align: center">Servicecenter</th>
<th style="text-align: center">Local address</th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align: center">http://10.0.0.10:30100</td>
<td style="text-align: center">10.0.0.10</td>
</tr>
<tr>
<td style="text-align: center">http://10.0.0.11:30100</td>
<td style="text-align: center">10.0.0.11</td>
</tr>
</tbody>
</table>
<h4 id="single-mode">Single Mode</h4>
<p>Start Service-center Syncer to enable communication between 2 service centers</p>
<ul>
<li>Start Sycner on host 10.0.0.10</li>
</ul>
<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>./syncer daemon <span class="nt">--sc-addr</span> http://10.0.0.10:30100 <span class="nt">--bind-addr</span> 10.0.0.10:30190 <span class="nt">--rpc-addr</span> 10.0.0.10:30191
</code></pre></div></div>
<ul>
<li>Start Syncer on host 10.0.0.11 and join into 10.0.0.10 gossip pool</li>
</ul>
<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>./syncer daemon <span class="nt">--sc-addr</span> http://10.0.0.11:30100 <span class="nt">--bind-addr</span> 10.0.0.11:30190 <span class="nt">--rpc-addr</span> 10.0.0.11:30191 <span class="nt">--join-addr</span> 10.0.0.10:30191
</code></pre></div></div>
<h4 id="cluster-mode">Cluster Mode</h4>
<p>Start 2 Syncer clusters on there host to synchronize microservice data between the 2 service centers</p>
<ul>
<li>Start Syncer cluster on host 10.0.0.10</li>
</ul>
<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>./syncer daemon <span class="nt">--sc-addr</span> http://10.0.0.10:30100 <span class="nt">--bind-addr</span> 10.0.0.10:30190 <span class="nt">--rpc-addr</span> 10.0.0.10:30191 <span class="nt">--mode</span> cluster <span class="nt">--node</span> syncer011 <span class="nt">--cluster-port</span> 30201 <span class="nt">--join-addr</span> 10.0.0.10:30190
<span class="nv">$ </span>./syncer daemon <span class="nt">--sc-addr</span> http://10.0.0.10:30100 <span class="nt">--bind-addr</span> 10.0.0.10:30290 <span class="nt">--rpc-addr</span> 10.0.0.10:30291 <span class="nt">--mode</span> cluster <span class="nt">--node</span> syncer012 <span class="nt">--cluster-port</span> 30202 <span class="nt">--join-addr</span> 10.0.0.10:30190
<span class="nv">$ </span>./syncer daemon <span class="nt">--sc-addr</span> http://10.0.0.10:30100 <span class="nt">--bind-addr</span> 10.0.0.10:30390 <span class="nt">--rpc-addr</span> 10.0.0.10:30391 <span class="nt">--mode</span> cluster <span class="nt">--node</span> syncer013 <span class="nt">--cluster-port</span> 30203 <span class="nt">--join-addr</span> 10.0.0.10:30190
</code></pre></div></div>
<ul>
<li>Start Syncer cluster on host 10.0.0.11</li>
</ul>
<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>./syncer daemon <span class="nt">--sc-addr</span> http://10.0.0.11:30100 <span class="nt">--bind-addr</span> 10.0.0.11:30190 <span class="nt">--rpc-addr</span> 10.0.0.11:30191 <span class="nt">--mode</span> cluster <span class="nt">--node</span> syncer021 <span class="nt">--cluster-port</span> 30201 <span class="nt">--join-addr</span> 10.0.0.10:30190
<span class="nv">$ </span>./syncer daemon <span class="nt">--sc-addr</span> http://10.0.0.11:30100 <span class="nt">--bind-addr</span> 10.0.0.11:30290 <span class="nt">--rpc-addr</span> 10.0.0.11:30291 <span class="nt">--mode</span> cluster <span class="nt">--node</span> syncer022 <span class="nt">--cluster-port</span> 30202 <span class="nt">--join-addr</span> 10.0.0.10:30190
<span class="nv">$ </span>./syncer daemon <span class="nt">--sc-addr</span> http://10.0.0.11:30100 <span class="nt">--bind-addr</span> 10.0.0.11:30390 <span class="nt">--rpc-addr</span> 10.0.0.11:30391 <span class="nt">--mode</span> cluster <span class="nt">--node</span> syncer023 <span class="nt">--cluster-port</span> 30203 <span class="nt">--join-addr</span> 10.0.0.10:30190
</code></pre></div></div>
<p><strong>Verification</strong><br />
30 seconds after registering a microservice to one of the Service-centers, the information about it can be get from the other one.</p>
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