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<p>To use this Apache Druid (incubating) extension, make sure to <a href="/docs/latest/development/extensions.html#loading-extensions">include</a> <code>opentsdb-emitter</code> extension.</p>
<h2><a class="anchor" aria-hidden="true" id="introduction"></a><a href="#introduction" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Introduction</h2>
<p>This extension emits druid metrics to <a href="https://github.com/OpenTSDB/opentsdb">OpenTSDB</a> over HTTP (Using <code>Jersey client</code>). And this emitter only emits service metric events to OpenTSDB (See <a href="/docs/latest/operations/metrics.html">Druid metrics</a> for a list of metrics).</p>
<h2><a class="anchor" aria-hidden="true" id="configuration"></a><a href="#configuration" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Configuration</h2>
<p>All the configuration parameters for the OpenTSDB emitter are under <code>druid.emitter.opentsdb</code>.</p>
<table>
<thead>
<tr><th>property</th><th>description</th><th>required?</th><th>default</th></tr>
</thead>
<tbody>
<tr><td><code>druid.emitter.opentsdb.host</code></td><td>The host of the OpenTSDB server.</td><td>yes</td><td>none</td></tr>
<tr><td><code>druid.emitter.opentsdb.port</code></td><td>The port of the OpenTSDB server.</td><td>yes</td><td>none</td></tr>
<tr><td><code>druid.emitter.opentsdb.connectionTimeout</code></td><td><code>Jersey client</code> connection timeout(in milliseconds).</td><td>no</td><td>2000</td></tr>
<tr><td><code>druid.emitter.opentsdb.readTimeout</code></td><td><code>Jersey client</code> read timeout(in milliseconds).</td><td>no</td><td>2000</td></tr>
<tr><td><code>druid.emitter.opentsdb.flushThreshold</code></td><td>Queue flushing threshold.(Events will be sent as one batch)</td><td>no</td><td>100</td></tr>
<tr><td><code>druid.emitter.opentsdb.maxQueueSize</code></td><td>Maximum size of the queue used to buffer events.</td><td>no</td><td>1000</td></tr>
<tr><td><code>druid.emitter.opentsdb.consumeDelay</code></td><td>Queue consuming delay(in milliseconds). Actually, we use <code>ScheduledExecutorService</code> to schedule consuming events, so this <code>consumeDelay</code> means the delay between the termination of one execution and the commencement of the next. If your druid processes produce metric events fast, then you should decrease this <code>consumeDelay</code> or increase the <code>maxQueueSize</code>.</td><td>no</td><td>10000</td></tr>
<tr><td><code>druid.emitter.opentsdb.metricMapPath</code></td><td>JSON file defining the desired metrics and dimensions for every Druid metric</td><td>no</td><td>./src/main/resources/defaultMetrics.json</td></tr>
</tbody>
</table>
<h3><a class="anchor" aria-hidden="true" id="druid-to-opentsdb-event-converter"></a><a href="#druid-to-opentsdb-event-converter" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Druid to OpenTSDB Event Converter</h3>
<p>The OpenTSDB emitter will send only the desired metrics and dimensions which is defined in a JSON file.
If the user does not specify their own JSON file, a default file is used.  All metrics are expected to be configured in the JSON file. Metrics which are not configured will be logged.
Desired metrics and dimensions is organized using the following schema:<code>&lt;druid metric name&gt; : [ &lt;dimension list&gt; ]</code><br />
e.g.</p>
<pre><code class="hljs css language-json">"query/time": [
    "dataSource",
    "type"
]
</code></pre>
<p>For most use-cases, the default configuration is sufficient.</p>
</span></div></article></div><div class="docs-prevnext"><a class="docs-prev button" href="/docs/latest/development/extensions-contrib/moving-average-query.html"><span class="arrow-prev">← </span><span>development/extensions-contrib/moving-average-query</span></a><a class="docs-next button" href="/docs/latest/development/extensions-contrib/redis-cache.html"><span>Druid Redis Cache</span><span class="arrow-next"> →</span></a></div></div></div><nav class="onPageNav"><ul class="toc-headings"><li><a href="#introduction">Introduction</a></li><li><a href="#configuration">Configuration</a><ul class="toc-headings"><li><a href="#druid-to-opentsdb-event-converter">Druid to OpenTSDB Event Converter</a></li></ul></li></ul></nav></div><footer class="nav-footer druid-footer" id="footer"><div class="container"><div class="text-center"><p><a href="/technology">Technology</a> · <a href="/use-cases">Use Cases</a> · <a href="/druid-powered">Powered by Druid</a> · <a href="/docs/latest/latest">Docs</a> · <a href="/community/">Community</a> · <a href="/downloads.html">Download</a> · <a href="/faq">FAQ</a></p></div><div class="text-center"><a title="Join the user group" href="https://groups.google.com/forum/#!forum/druid-user" target="_blank"><span class="fa fa-comments"></span></a> · <a title="Follow Druid" href="https://twitter.com/druidio" target="_blank"><span class="fab fa-twitter"></span></a> · <a title="Download via Apache" href="https://www.apache.org/dyn/closer.cgi?path=/incubator/druid/{{ site.druid_versions[0].versions[0].version }}/apache-druid-{{ site.druid_versions[0].versions[0].version }}-bin.tar.gz" target="_blank"><span class="fas fa-feather"></span></a> · <a title="GitHub" href="https://github.com/apache/incubator-druid" target="_blank"><span class="fab fa-github"></span></a></div><div class="text-center license">Copyright © 2019 <a href="https://www.apache.org/" target="_blank">Apache Software Foundation</a>.<br/>Except where otherwise noted, licensed under <a rel="license" href="http://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA 4.0</a>.<br/>Apache Druid, Druid, and the Druid logo are either registered trademarks or trademarks of The Apache Software Foundation in the United States and other countries.</div></div></footer></div></body></html>