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<section id="instance-configuration">
<span id="instance-config"></span><h1>Instance configuration<a class="headerlink" href="#instance-configuration" title="Link to this heading">¶</a></h1>
<p>The instance configuration consists of different categories:</p>
<dl class="simple myst">
<dt>Instance properties</dt><dd><p>Instance properties are specified when the instance is created.
They include, for example, the instance name and architecture.
Some of the properties are read-only and cannot be changed after creation, while others can be updated by <a class="reference internal" href="../../howto/instances_configure/#instances-configure-properties"><span class="std std-ref">setting their property value</span></a> or <a class="reference internal" href="../../howto/instances_configure/#instances-configure-edit"><span class="std std-ref">editing the full instance configuration</span></a>.</p>
<p>In the YAML configuration, properties are on the top level.</p>
<p>See <a class="reference internal" href="../../reference/instance_properties/#instance-properties"><span class="std std-ref">Instance properties</span></a> for a reference of available instance properties.</p>
</dd>
<dt>Instance options</dt><dd><p>Instance options are configuration options that are related directly to the instance.
They include, for example, startup options, security settings, hardware limits, kernel modules, snapshots and user keys.
These options can be specified as key/value pairs during instance creation (through the <code class="docutils literal notranslate"><span class="pre">--config</span> <span class="pre">key=value</span></code> flag).
After creation, they can be configured with the <a class="reference internal" href="../../reference/manpages/lxc/config/set/#lxc-config-set-md"><span class="std std-ref"><code class="docutils literal notranslate"><span class="pre">lxc</span> <span class="pre">config</span> <span class="pre">set</span></code></span></a> and <a class="reference internal" href="../../reference/manpages/lxc/config/unset/#lxc-config-unset-md"><span class="std std-ref"><code class="docutils literal notranslate"><span class="pre">lxc</span> <span class="pre">config</span> <span class="pre">unset</span></code></span></a> commands.</p>
<p>In the YAML configuration, options are located under the <code class="docutils literal notranslate"><span class="pre">config</span></code> entry.</p>
<p>See <a class="reference internal" href="../../reference/instance_options/#instance-options"><span class="std std-ref">Instance options</span></a> for a reference of available instance options, and <a class="reference internal" href="../../howto/instances_configure/#instances-configure-options"><span class="std std-ref">Configure instance options</span></a> for instructions on how to configure the options.</p>
</dd>
<dt>Instance devices</dt><dd><p>Instance devices are attached to an instance.
They include, for example, network interfaces, mount points, USB and GPU devices.
Devices are usually added after an instance is created with the <a class="reference internal" href="../../reference/manpages/lxc/config/device/add/#lxc-config-device-add-md"><span class="std std-ref"><code class="docutils literal notranslate"><span class="pre">lxc</span> <span class="pre">config</span> <span class="pre">device</span> <span class="pre">add</span></code></span></a> command, but they can also be added to a profile or a YAML configuration file that is used to create an instance.</p>
<p>Each type of device has its own specific set of options, referred to as <em>instance device options</em>.</p>
<p>In the YAML configuration, devices are located under the <code class="docutils literal notranslate"><span class="pre">devices</span></code> entry.</p>
<p>See <a class="reference internal" href="../../reference/devices/#devices"><span class="std std-ref">Devices</span></a> for a reference of available devices and the corresponding instance device options, and <a class="reference internal" href="../../howto/instances_configure/#instances-configure-devices"><span class="std std-ref">Configure devices</span></a> for instructions on how to add and configure instance devices.</p>
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