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class="section" id="hostname-resolver-transformation"> <h1>Hostname Resolver Transformation<a class="headerlink" href="#hostname-resolver-transformation" title="このヘッドラインへのパーマリンク">¶</a></h1> <p>Apache Kafka® ソースレコードの <code class="docutils literal notranslate"><span class="pre">host</span></code> フィールドの値が IP アドレスとして指定されている場合、その IP アドレスを解決したホスト名に更新することは多くの場合有用です。これは <code class="docutils literal notranslate"><span class="pre">Hostname</span> <span class="pre">Resolver</span> <span class="pre">Transformation</span></code> を使用すると簡単です。この変換機能では、DNS 逆引き参照を実行して、IP アドレスからホスト名への置き換えが行われます。たとえば、 <code class="docutils literal notranslate"><span class="pre">127.0.0.1</span></code> はほとんどのマシンでは <code class="docutils literal notranslate"><span class="pre">localhost</span></code> と置き換えられます。</p> <p>例として、コネクターの構成に以下の行を含めることで、変換機能を使用できます。</p> <div class="highlight-properties notranslate"><div class="highlight"><pre><span></span><span class="na">transforms</span><span class="o">=</span><span class="s">hostname</span><span class="w"></span> <span class="na">transforms.hostname.type</span><span class="o">=</span><span class="s">io.confluent.connect.syslog.HostnameResolverTransformation</span><span class="w"></span> </pre></div> </div> <div class="section" id="configuration-options"> <h2>構成オプション<a class="headerlink" href="#configuration-options" title="このヘッドラインへのパーマリンク">¶</a></h2> <dl class="docutils"> <dt><code class="docutils literal notranslate"><span class="pre">field.name</span></code></dt><dd><p>リモートホストの IP アドレスを含むフィールドの名前。</p> <ul class="simple"> <li>型: string</li> <li>デフォルト: remoteAddress</li> <li>重要度: 中</li> </ul> </dd> <dt><code class="docutils literal notranslate"><span class="pre">dns.cache.stats.secs</span></code></dt><dd><p>DNS キャッシュのキャッシュ統計をダンプする時間（秒）。</p> <ul class="simple"> <li>型: int</li> <li>デフォルト: 300</li> <li>指定可能な値: [1,…]</li> <li>重要度: 低</li> </ul> </dd> <dt><code class="docutils literal notranslate"><span class="pre">dns.cache.ttl.secs</span></code></dt><dd><p>DNS エントリをキャッシュする時間（秒）。</p> <ul class="simple"> <li>型: int</li> <li>デフォルト: 300</li> <li>指定可能な値: [1,…]</li> <li>重要度: 低</li> </ul> </dd> <dt><code class="docutils literal notranslate"><span class="pre">dns.query.timeout.secs</span></code></dt><dd><p>クエリがタイムアウトするまでの時間（秒）。</p> <ul class="simple"> <li>型: int</li> <li>デフォルト: 15</li> <li>指定可能な値: [1,…]</li> <li>重要度: 低</li> </ul> </dd> </dl> </div> </div> </div> </div> <div class="footer-feedback"> <button class="cflt-btn userback-trigger"><i class="fa fa-comment"></i>Feedback</button> </div> <footer> <div class="footer-cta"> <p>Confluent Cloud is a fully-managed Apache Kafka service available on all three major clouds. 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