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<strong>IMPORTANT</strong>: No additional bug fixes or documentation updates
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<div class="titlepage"><div><div>
<h2 class="title"><a id="plugins-codecs-protobuf"></a>protobuf<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/logstash-plugins/logstash-codec-plain/edit/master/docs/index.asciidoc">edit</a></h2>
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<div class="ulist itemizedlist">
<ul class="itemizedlist">
<li class="listitem">
Version: 1.0.0
</li>
<li class="listitem">
Released on: December 4, 2016
</li>
<li class="listitem">
<a href="https://github.com/logstash-plugins/logstash-codec-protobuf/blob/master/CHANGELOG.md#100" class="ulink" target="_top">Changelog</a>
</li>
</ul>
</div>
<div class="section">
<div class="titlepage"><div><div>
<h3 class="title"><a id="_installation_9"></a>Installation<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/logstash-plugins/logstash-codec-plain/edit/master/docs/index.asciidoc">edit</a></h3>
</div></div></div>
<p>For plugins not bundled by default, it is easy to install by running <code class="literal">bin/logstash-plugin install logstash-codec-protobuf</code>. See <a class="xref" href="working-with-plugins.html" title="Working with plugins"><em>Working with plugins</em></a> for more details.</p>
</div>
<div class="section">
<div class="titlepage"><div><div>
<h3 class="title"><a id="_getting_help_97"></a>Getting Help<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/logstash-plugins/logstash-codec-plain/edit/master/docs/index.asciidoc">edit</a></h3>
</div></div></div>
<p>For questions about the plugin, open a topic in the <a href="http://discuss.elastic.co" class="ulink" target="_top">Discuss</a> forums. For bugs or feature requests, open an issue in <a href="https://github.com/elastic/logstash" class="ulink" target="_top">Github</a>.
For the list of Elastic supported plugins, please consult the <a href="/support/matrix#show_logstash_plugins" class="ulink" target="_top">Elastic Support Matrix</a>.</p>
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<h3 class="title"><a id="_description_97"></a>Description<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/logstash-plugins/logstash-codec-plain/edit/master/docs/index.asciidoc">edit</a></h3>
</div></div></div>
<p>This codec converts protobuf encoded messages into logstash events and vice versa.</p>
<p>Requires the protobuf definitions as ruby files. You can create those using the [ruby-protoc compiler](<a href="https://github.com/codekitchen/ruby-protocol-buffers" class="ulink" target="_top">https://github.com/codekitchen/ruby-protocol-buffers</a>).</p>
<p>The following shows a usage example for decoding events from a kafka stream:</p>
<div class="pre_wrapper lang-ruby">
<pre class="programlisting prettyprint lang-ruby">kafka
{
zk_connect => "127.0.0.1"
topic_id => "your_topic_goes_here"
codec => protobuf
{
class_name => "Animal::Unicorn"
include_path => ['/path/to/protobuf/definitions/UnicornProtobuf.pb.rb']
}
}</pre>
</div>
<p> </p>
</div>
<div class="section">
<div class="titlepage"><div><div>
<h3 class="title"><a id="_synopsis_180"></a>Synopsis<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/logstash-plugins/logstash-codec-plain/edit/master/docs/index.asciidoc">edit</a></h3>
</div></div></div>
<p>This plugin supports the following configuration options:</p>
<p>Required configuration options:</p>
<div class="pre_wrapper lang-json">
<pre class="programlisting prettyprint lang-json">protobuf {
class_name => ...
include_path => ...
}</pre>
</div>
<p>Available configuration options:</p>
<div class="informaltable">
<table border="1" cellpadding="4px">
<colgroup>
<col class="col_1"/>
<col class="col_2"/>
<col class="col_3"/>
</colgroup>
<thead>
<tr>
<th align="left" valign="top">Setting</th>
<th align="left" valign="top">Input type</th>
<th align="left" valign="top">Required</th>
</tr>
</thead>
<tbody>
<tr>
<td align="left" valign="top"><p><a class="xref" href="plugins-codecs-protobuf.html#plugins-codecs-protobuf-class_name" title="class_name"><code class="literal">class_name</code></a></p></td>
<td align="left" valign="top"><p><a class="xref" href="configuration-file-structure.html#string" title="String">string</a></p></td>
<td align="left" valign="top"><p>Yes</p></td>
</tr>
<tr>
<td align="left" valign="top"><p><a class="xref" href="plugins-codecs-protobuf.html#plugins-codecs-protobuf-enable_metric" title="enable_metric"><code class="literal">enable_metric</code></a></p></td>
<td align="left" valign="top"><p><a class="xref" href="configuration-file-structure.html#boolean" title="Boolean">boolean</a></p></td>
<td align="left" valign="top"><p>No</p></td>
</tr>
<tr>
<td align="left" valign="top"><p><a class="xref" href="plugins-codecs-protobuf.html#plugins-codecs-protobuf-id" title="id"><code class="literal">id</code></a></p></td>
<td align="left" valign="top"><p><a class="xref" href="configuration-file-structure.html#string" title="String">string</a></p></td>
<td align="left" valign="top"><p>No</p></td>
</tr>
<tr>
<td align="left" valign="top"><p><a class="xref" href="plugins-codecs-protobuf.html#plugins-codecs-protobuf-include_path" title="include_path"><code class="literal">include_path</code></a></p></td>
<td align="left" valign="top"><p><a class="xref" href="configuration-file-structure.html#array" title="Array">array</a></p></td>
<td align="left" valign="top"><p>Yes</p></td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="section">
<div class="titlepage"><div><div>
<h3 class="title"><a id="_details_180"></a>Details<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/logstash-plugins/logstash-codec-plain/edit/master/docs/index.asciidoc">edit</a></h3>
</div></div></div>
<p> </p>
<div class="section">
<div class="titlepage"><div><div>
<h4 class="title"><a id="plugins-codecs-protobuf-class_name"></a><code class="literal">class_name</code><a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/logstash-plugins/logstash-codec-plain/edit/master/docs/index.asciidoc">edit</a></h4>
</div></div></div>
<div class="ulist itemizedlist">
<ul class="itemizedlist">
<li class="listitem">
This is a required setting.
</li>
<li class="listitem">
Value type is <a class="xref" href="configuration-file-structure.html#string" title="String">string</a>
</li>
<li class="listitem">
There is no default value for this setting.
</li>
</ul>
</div>
<p>Name of the class to decode.
If your protobuf definition contains modules, prepend them to the class name with double colons like so:</p>
<div class="pre_wrapper lang-ruby">
<pre class="programlisting prettyprint lang-ruby">class_name => "Foods::Dairy::Cheese"</pre>
</div>
<p>This corresponds to a protobuf definition starting as follows:</p>
<div class="pre_wrapper lang-ruby">
<pre class="programlisting prettyprint lang-ruby">module Foods
module Dairy
class Cheese
# here are your field definitions.</pre>
</div>
<p>If your class references other definitions: you only have to add the main class here.</p>
</div>
<div class="section">
<div class="titlepage"><div><div>
<h4 class="title"><a id="plugins-codecs-protobuf-enable_metric"></a><code class="literal">enable_metric</code><a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/logstash-plugins/logstash-codec-plain/edit/master/docs/index.asciidoc">edit</a></h4>
</div></div></div>
<div class="ulist itemizedlist">
<ul class="itemizedlist">
<li class="listitem">
Value type is <a class="xref" href="configuration-file-structure.html#boolean" title="Boolean">boolean</a>
</li>
<li class="listitem">
Default value is <code class="literal">true</code>
</li>
</ul>
</div>
<p>Disable or enable metric logging for this specific plugin instance
by default we record all the metrics we can, but you can disable metrics collection
for a specific plugin.</p>
</div>
<div class="section">
<div class="titlepage"><div><div>
<h4 class="title"><a id="plugins-codecs-protobuf-id"></a><code class="literal">id</code><a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/logstash-plugins/logstash-codec-plain/edit/master/docs/index.asciidoc">edit</a></h4>
</div></div></div>
<div class="ulist itemizedlist">
<ul class="itemizedlist">
<li class="listitem">
Value type is <a class="xref" href="configuration-file-structure.html#string" title="String">string</a>
</li>
<li class="listitem">
There is no default value for this setting.
</li>
</ul>
</div>
<p>Add a unique <code class="literal">ID</code> to the plugin configuration. If no ID is specified, Logstash will generate one.
It is strongly recommended to set this ID in your configuration. This is particulary useful
when you have two or more plugins of the same type, for example, if you have 2 grok filters.
Adding a named ID in this case will help in monitoring Logstash when using the monitoring APIs.</p>
<div class="pre_wrapper lang-ruby">
<pre class="programlisting prettyprint lang-ruby">output {
stdout {
id => "my_plugin_id"
}
}</pre>
</div>
</div>
<div class="section">
<div class="titlepage"><div><div>
<h4 class="title"><a id="plugins-codecs-protobuf-include_path"></a><code class="literal">include_path</code><a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/logstash-plugins/logstash-codec-plain/edit/master/docs/index.asciidoc">edit</a></h4>
</div></div></div>
<div class="ulist itemizedlist">
<ul class="itemizedlist">
<li class="listitem">
This is a required setting.
</li>
<li class="listitem">
Value type is <a class="xref" href="configuration-file-structure.html#array" title="Array">array</a>
</li>
<li class="listitem">
There is no default value for this setting.
</li>
</ul>
</div>
<p>List of absolute pathes to files with protobuf definitions.
When using more than one file, make sure to arrange the files in reverse order of dependency so that each class is loaded before it is
refered to by another.</p>
<p>Example: a class <em>Cheese</em> referencing another protobuf class <em>Milk</em></p>
<div class="pre_wrapper lang-ruby">
<pre class="programlisting prettyprint lang-ruby">module Foods
module Dairy
class Cheese
set_fully_qualified_name "Foods.Dairy.Cheese"
optional ::Foods::Cheese::Milk, :milk, 1
optional :int64, :unique_id, 2
# here be more field definitions</pre>
</div>
<p>would be configured as</p>
<div class="pre_wrapper lang-ruby">
<pre class="programlisting prettyprint lang-ruby">include_path => ['/path/to/protobuf/definitions/Milk.pb.rb','/path/to/protobuf/definitions/Cheese.pb.rb']</pre>
</div>
<p>When using the codec in an output plugin:
* make sure to include all the desired fields in the protobuf definition, including timestamp.
Remove fields that are not part of the protobuf definition from the event by using the mutate filter.
* the @ symbol is currently not supported in field names when loading the protobuf definitions for encoding. Make sure to call the timestamp field "timestamp"
instead of "@timestamp" in the protobuf file. Logstash event fields will be stripped of the leading @ before conversion.</p>
</div>
</div>
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