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<h2 class="title"><a id="configuration-file-structure"></a>Structure of a Config File<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/logstash/edit/7.0/docs/static/configuration.asciidoc">edit</a></h2>
</div></div></div>
<p>A Logstash config file has a separate section for each type of plugin you want to add to the event processing pipeline. For example:</p>
<div class="pre_wrapper lang-js">
<pre class="programlisting prettyprint lang-js"># This is a comment. You should use comments to describe
# parts of your configuration.
input {
...
}
filter {
...
}
output {
...
}</pre>
</div>
<p>Each section contains the configuration options for one or more plugins. If you specify
multiple filters, they are applied in the order of their appearance in the configuration file.</p>
<h3><a id="plugin_configuration"></a>Plugin Configuration<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/logstash/edit/7.0/docs/static/configuration.asciidoc">edit</a></h3>
<p>The configuration of a plugin consists of the plugin name followed
by a block of settings for that plugin. For example, this input section configures two file inputs:</p>
<div class="pre_wrapper lang-js">
<pre class="programlisting prettyprint lang-js">input {
file {
path => "/var/log/messages"
type => "syslog"
}
file {
path => "/var/log/apache/access.log"
type => "apache"
}
}</pre>
</div>
<p>In this example, two settings are configured for each of the file inputs: <em>path</em> and <em>type</em>.</p>
<p>The settings you can configure vary according to the plugin type. For information about each plugin, see <a class="xref" href="input-plugins.html" title="Input plugins">Input Plugins</a>, <a class="xref" href="output-plugins.html" title="Output plugins">Output Plugins</a>, <a class="xref" href="filter-plugins.html" title="Filter plugins">Filter Plugins</a>, and <a class="xref" href="codec-plugins.html" title="Codec plugins">Codec Plugins</a>.</p>
<h3><a id="plugin-value-types"></a>Value Types<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/logstash/edit/7.0/docs/static/configuration.asciidoc">edit</a></h3>
<p>A plugin can require that the value for a setting be a
certain type, such as boolean, list, or hash. The following value
types are supported.</p>
<div class="section">
<div class="titlepage"><div><div>
<h3 class="title"><a id="array"></a>Array<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/logstash/edit/7.0/docs/static/configuration.asciidoc">edit</a></h3>
</div></div></div>
<p>This type is now mostly deprecated in favor of using a standard type like <code class="literal">string</code> with the plugin defining the <code class="literal">:list => true</code> property for better type checking. It is still needed to handle lists of hashes or mixed types where type checking is not desired.</p>
<p>Example:</p>
<div class="pre_wrapper lang-js">
<pre class="programlisting prettyprint lang-js"> users => [ {id => 1, name => bob}, {id => 2, name => jane} ]</pre>
</div>
<h4><a id="list"></a>Lists<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/logstash/edit/7.0/docs/static/configuration.asciidoc">edit</a></h4>
<p>Not a type in and of itself, but a property types can have.
This makes it possible to type check multiple values.
Plugin authors can enable list checking by specifying <code class="literal">:list => true</code> when declaring an argument.</p>
<p>Example:</p>
<div class="pre_wrapper lang-js">
<pre class="programlisting prettyprint lang-js"> path => [ "/var/log/messages", "/var/log/*.log" ]
uris => [ "http://elastic.co", "http://example.net" ]</pre>
</div>
<p>This example configures <code class="literal">path</code>, which is a <code class="literal">string</code> to be a list that contains an element for each of the three strings. It also will configure the <code class="literal">uris</code> parameter to be a list of URIs, failing if any of the URIs provided are not valid.</p>
<h4><a id="boolean"></a>Boolean<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/logstash/edit/7.0/docs/static/configuration.asciidoc">edit</a></h4>
<p>A boolean must be either <code class="literal">true</code> or <code class="literal">false</code>. Note that the <code class="literal">true</code> and <code class="literal">false</code> keywords
are not enclosed in quotes.</p>
<p>Example:</p>
<div class="pre_wrapper lang-js">
<pre class="programlisting prettyprint lang-js"> ssl_enable => true</pre>
</div>
<h4><a id="bytes"></a>Bytes<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/logstash/edit/7.0/docs/static/configuration.asciidoc">edit</a></h4>
<p>A bytes field is a string field that represents a valid unit of bytes. It is a
convenient way to declare specific sizes in your plugin options. Both SI (k M G T P E Z Y)
and Binary (Ki Mi Gi Ti Pi Ei Zi Yi) units are supported. Binary units are in
base-1024 and SI units are in base-1000. This field is case-insensitive
and accepts space between the value and the unit. If no unit is specified, the integer string
represents the number of bytes.</p>
<p>Examples:</p>
<div class="pre_wrapper lang-js">
<pre class="programlisting prettyprint lang-js"> my_bytes => "1113" # 1113 bytes
my_bytes => "10MiB" # 10485760 bytes
my_bytes => "100kib" # 102400 bytes
my_bytes => "180 mb" # 180000000 bytes</pre>
</div>
<h4><a id="codec"></a>Codec<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/logstash/edit/7.0/docs/static/configuration.asciidoc">edit</a></h4>
<p>A codec is the name of Logstash codec used to represent the data. Codecs can be
used in both inputs and outputs.</p>
<p>Input codecs provide a convenient way to decode your data before it enters the input.
Output codecs provide a convenient way to encode your data before it leaves the output.
Using an input or output codec eliminates the need for a separate filter in your Logstash pipeline.</p>
<p>A list of available codecs can be found at the <a class="xref" href="codec-plugins.html" title="Codec plugins">Codec Plugins</a> page.</p>
<p>Example:</p>
<div class="pre_wrapper lang-js">
<pre class="programlisting prettyprint lang-js"> codec => "json"</pre>
</div>
<h4><a id="hash"></a>Hash<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/logstash/edit/7.0/docs/static/configuration.asciidoc">edit</a></h4>
<p>A hash is a collection of key value pairs specified in the format <code class="literal">"field1" => "value1"</code>.
Note that multiple key value entries are separated by spaces rather than commas.</p>
<p>Example:</p>
<div class="pre_wrapper lang-js">
<pre class="programlisting prettyprint lang-js">match => {
"field1" => "value1"
"field2" => "value2"
...
}
# or as a single line. No commas between entries:
match => { "field1" => "value1" "field2" => "value2" }</pre>
</div>
<h4><a id="number"></a>Number<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/logstash/edit/7.0/docs/static/configuration.asciidoc">edit</a></h4>
<p>Numbers must be valid numeric values (floating point or integer).</p>
<p>Example:</p>
<div class="pre_wrapper lang-js">
<pre class="programlisting prettyprint lang-js"> port => 33</pre>
</div>
<h4><a id="password"></a>Password<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/logstash/edit/7.0/docs/static/configuration.asciidoc">edit</a></h4>
<p>A password is a string with a single value that is not logged or printed.</p>
<p>Example:</p>
<div class="pre_wrapper lang-js">
<pre class="programlisting prettyprint lang-js"> my_password => "password"</pre>
</div>
<h4><a id="uri"></a>URI<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/logstash/edit/7.0/docs/static/configuration.asciidoc">edit</a></h4>
<p>A URI can be anything from a full URL like <em><a href="http://elastic.co/" class="ulink" target="_top">http://elastic.co/</a></em> to a simple identifier
like <em>foobar</em>. If the URI contains a password such as <em><a href="http://user:[email protected]" class="ulink" target="_top">http://user:[email protected]</a></em> the password
portion of the URI will not be logged or printed.</p>
<p>Example:</p>
<div class="pre_wrapper lang-js">
<pre class="programlisting prettyprint lang-js"> my_uri => "http://foo:[email protected]"</pre>
</div>
<h4><a id="path"></a>Path<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/logstash/edit/7.0/docs/static/configuration.asciidoc">edit</a></h4>
<p>A path is a string that represents a valid operating system path.</p>
<p>Example:</p>
<div class="pre_wrapper lang-js">
<pre class="programlisting prettyprint lang-js"> my_path => "/tmp/logstash"</pre>
</div>
<h4><a id="string"></a>String<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/logstash/edit/7.0/docs/static/configuration.asciidoc">edit</a></h4>
<p>A string must be a single character sequence. Note that string values are
enclosed in quotes, either double or single.</p>
<div class="section">
<div class="titlepage"><div><div>
<h4 class="title"><a id="_escape_sequences"></a>Escape Sequences<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/logstash/edit/7.0/docs/static/configuration.asciidoc">edit</a></h4>
</div></div></div>
<p>By default, escape sequences are not enabled. If you wish to use escape
sequences in quoted strings, you will need to set
<code class="literal">config.support_escapes: true</code> in your <code class="literal">logstash.yml</code>. When <code class="literal">true</code>, quoted
strings (double and single) will have this transformation:</p>
<div class="informaltable">
<table border="1" cellpadding="4px">
<colgroup>
<col class="col_1"/>
<col class="col_2"/>
</colgroup>
<tbody>
<tr>
<td align="left" valign="top"><p>Text</p></td>
<td align="left" valign="top"><p>Result</p></td>
</tr>
<tr>
<td align="left" valign="top"><p>\r</p></td>
<td align="left" valign="top"><p>carriage return (ASCII 13)</p></td>
</tr>
<tr>
<td align="left" valign="top"><p>\n</p></td>
<td align="left" valign="top"><p>new line (ASCII 10)</p></td>
</tr>
<tr>
<td align="left" valign="top"><p>\t</p></td>
<td align="left" valign="top"><p>tab (ASCII 9)</p></td>
</tr>
<tr>
<td align="left" valign="top"><p>\\</p></td>
<td align="left" valign="top"><p>backslash (ASCII 92)</p></td>
</tr>
<tr>
<td align="left" valign="top"><p>\"</p></td>
<td align="left" valign="top"><p>double quote (ASCII 34)</p></td>
</tr>
<tr>
<td align="left" valign="top"><p>\'</p></td>
<td align="left" valign="top"><p>single quote (ASCII 39)</p></td>
</tr>
</tbody>
</table>
</div>
<p>Example:</p>
<div class="pre_wrapper lang-js">
<pre class="programlisting prettyprint lang-js"> name => "Hello world"
name => 'It\'s a beautiful day'</pre>
</div>
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<p>Comments are the same as in perl, ruby, and python. A comment starts with a <em>#</em> character, and does not need to be at the beginning of a line. For example:</p>
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# ...
}</pre>
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