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        <article role="main" id="furo-main-content">
          <section id="lxd-6-6-release-notes">
<span id="ref-release-notes-6-6"></span><h1>LXD 6.6 release notes<a class="headerlink" href="#lxd-6-6-release-notes" title="Link to this heading">¶</a></h1>
<p>This is a <a class="reference internal" href="../../releases-snap/#ref-releases-feature"><span class="std std-ref">feature release</span></a> and is not recommended for production use.</p>
<div class="note admonition">
<p class="admonition-title">Release notes content</p>
<p>These release notes cover updates in the <a class="reference external" href="https://github.com/canonical/lxd">core LXD repository</a> and the <a class="reference external" href="https://snapcraft.io/lxd">LXD snap package</a>.
For a tour of <a class="reference external" href="https://github.com/canonical/lxd-ui">LXD UI</a> updates, please see the release announcement in <a class="reference external" href="https://discourse.ubuntu.com/t/lxd-6-6-has-been-released/72476">our Discourse forum</a>.</p>
</div>
<section id="highlights">
<span id="ref-release-notes-6-6-highlights"></span><h2>Highlights<a class="headerlink" href="#highlights" title="Link to this heading">¶</a></h2>
<p>This section highlights new and improved features in this release.</p>
<section id="instance-placement-groups">
<h3>Instance placement groups<a class="headerlink" href="#instance-placement-groups" title="Link to this heading">¶</a></h3>
<p>This release adds the concept of <a class="reference internal" href="../../../explanation/clusters/#exp-clusters-placement"><span class="std std-ref">placement groups</span></a>.
Placement groups provide declarative control over how instances are distributed across cluster members.
They define both a <strong>policy</strong> (how instances should be distributed) and a <strong>rigor</strong> (how strictly the policy is enforced).
Placement groups are project-scoped resources, which means different projects can have placement groups with the same name without conflict.</p>
<ul class="simple">
<li><p>Documentation: <a class="reference internal" href="../../../explanation/clusters/#exp-clusters-placement"><span class="std std-ref">Placement groups</span></a></p></li>
<li><p>API extension: <a class="reference internal" href="../../../api-extensions/#extension-instance-placement-groups"><span class="std std-ref">instance_placement_groups</span></a></p></li>
</ul>
</section>
<section id="placement-cluster-member-group-recorded">
<h3>Placement cluster member group recorded<a class="headerlink" href="#placement-cluster-member-group-recorded" title="Link to this heading">¶</a></h3>
<p>When an instance is placed into a cluster member group using the <code class="docutils literal notranslate"><span class="pre">--target=&#64;&lt;group&gt;</span></code> syntax, the group specified is now recorded into a new <a class="configref reference internal" href="../../instance_options/#instance-volatile:volatile.cluster.group"><code class="docutils literal notranslate"><span class="pre">volatile.cluster.group</span></code></a> configuration key.</p>
<p>This is then used during cluster member evacuation when <a class="reference internal" href="../../../howto/cluster_manage/#cluster-restore"><span class="std std-ref">restoring instances</span></a> to ensure the instance placement remains within the specified group.</p>
</section>
<section id="kubernetes-container-storage-interface-csi-driver-and-dev-lxd-volume-management">
<h3>Kubernetes Container Storage Interface (CSI) driver and <code class="docutils literal notranslate"><span class="pre">/dev/lxd</span></code> volume management<a class="headerlink" href="#kubernetes-container-storage-interface-csi-driver-and-dev-lxd-volume-management" title="Link to this heading">¶</a></h3>
<p>The LXD project now provides a CSI driver that allows Kubernetes to provision and manage volumes for K8s Pods.
The driver is an open source implementation of the Container Storage Interface (CSI) that integrates LXD storage backends with Kubernetes.
It leverages LXD’s wide range of supported storage drivers, enabling dynamic provisioning of both local and remote volumes.
Depending on the storage pool, the CSI supports provisioning of both block and filesystem volumes.</p>
<p>To enable this functionality, the <code class="docutils literal notranslate"><span class="pre">/dev/lxd</span></code> guest API has been extended to support fine-grained authorization (by way of bearer token authentication) and volume management.</p>
<ul class="simple">
<li><p>Documentation: <a class="reference internal" href="../../../explanation/csi/#exp-csi"><span class="std std-ref">The LXD CSI driver</span></a></p></li>
<li><p>Documentation: <a class="reference internal" href="../../../howto/devlxd_authenticate/#devlxd-authenticate"><span class="std std-ref">How to authenticate to the DevLXD API</span></a></p></li>
<li><p>API extension: <a class="reference internal" href="../../../api-extensions/#extension-auth-bearer-devlxd"><span class="std std-ref">auth_bearer_devlxd</span></a></p></li>
<li><p>API extension: <a class="reference internal" href="../../../api-extensions/#extension-devlxd-volume-management"><span class="std std-ref">devlxd_volume_management</span></a></p></li>
</ul>
</section>
<section id="custom-storage-volume-recovery-improvements">
<h3>Custom storage volume recovery improvements<a class="headerlink" href="#custom-storage-volume-recovery-improvements" title="Link to this heading">¶</a></h3>
<p>Using the <a class="reference internal" href="../../../api-extensions/#extension-backup-metadataversion"><span class="std std-ref">backup_metadata_version</span></a> improvements added in LXD 6.5, the <a class="reference internal" href="../../../howto/disaster_recovery/#disaster-recovery"><span class="std std-ref">lxd recover</span></a> tool now allows more extensive recovery of custom volumes attached to instances. The full custom volume configuration can now be recovered. Additionally, the tool now supports recovery from <a class="reference internal" href="../../storage_powerflex/#storage-powerflex"><span class="std std-ref">Dell PowerFlex - powerflex</span></a> and <a class="reference internal" href="../../storage_pure/#storage-pure"><span class="std std-ref">Pure Storage - pure</span></a> pools which was previously not supported.</p>
</section>
<section id="consistent-instance-and-custom-volume-snapshots">
<h3>Consistent instance and custom volume snapshots<a class="headerlink" href="#consistent-instance-and-custom-volume-snapshots" title="Link to this heading">¶</a></h3>
<p>Consistent snapshots of both an instance and its attached volumes can now be taken together.</p>
<p>The <code class="docutils literal notranslate"><span class="pre">lxc</span> <span class="pre">snapshot</span></code> command has been extended with the <code class="docutils literal notranslate"><span class="pre">--disk-volumes</span></code> flag that accepts either <code class="docutils literal notranslate"><span class="pre">root</span></code> or <code class="docutils literal notranslate"><span class="pre">all-exclusive</span></code> values.
When <code class="docutils literal notranslate"><span class="pre">root</span></code> is specified (the default behavior), a snapshot of just the instance’s root volume is taken.
In <code class="docutils literal notranslate"><span class="pre">all-exclusive</span></code> mode, the instance is paused while a snapshot of its root volume and all exclusively attached volumes is taken.</p>
<p>An instance snapshot and its custom volume snapshots can be restored together using <code class="docutils literal notranslate"><span class="pre">lxc</span> <span class="pre">restore</span> <span class="pre">--disk-volumes=all-exclusive</span></code>.</p>
<ul class="simple">
<li><p>Documentation: <a class="reference internal" href="../../../howto/instances_backup/#instances-snapshots"><span class="std std-ref">Use snapshots for instance backup</span></a></p></li>
<li><p>API extension: <a class="reference internal" href="../../../api-extensions/#extension-instance-snapshots-multi-volume"><span class="std std-ref">instance_snapshots_multi_volume</span></a></p></li>
</ul>
</section>
<section id="hpe-alletra-storage-driver">
<h3>HPE Alletra storage driver<a class="headerlink" href="#hpe-alletra-storage-driver" title="Link to this heading">¶</a></h3>
<p>Initial support for using HPE Alletra storage appliances using iSCSI or NVME over TCP has been added.
Currently, instance and custom volume recovery is not supported (but it is planned).</p>
<ul class="simple">
<li><p>Documentation: <a class="reference internal" href="../../storage_alletra/#storage-alletra"><span class="std std-ref">HPE Alletra - alletra</span></a></p></li>
<li><p>API extension: <a class="reference internal" href="../../../api-extensions/#extension-storage-driver-alletra"><span class="std std-ref">storage_driver_alletra</span></a></p></li>
</ul>
</section>
<section id="persistent-vm-pcie-bus-allocation">
<h3>Persistent VM PCIe bus allocation<a class="headerlink" href="#persistent-vm-pcie-bus-allocation" title="Link to this heading">¶</a></h3>
<p>Devices added to VMs now have their PCIe bus number persisted into volatile configuration keys so that the device maintains the same location on the bus when the instance is restarted. Previously, when a device was hot plugged into a running VM, it was possible for the operation to fail due to bus location conflicts or to succeed and then have its bus location change on a subsequent restart of the instance.</p>
<p>This change was also required to make the K8s CSI driver usable because it dynamically adds and removes custom filesystem volumes from running VMs.</p>
<ul class="simple">
<li><p>API extension: <a class="reference internal" href="../../../api-extensions/#extension-vm-persistent-bus"><span class="std std-ref">vm_persistent_bus</span></a></p></li>
</ul>
</section>
<section id="per-project-image-and-backup-volumes">
<h3>Per-project image and backup volumes<a class="headerlink" href="#per-project-image-and-backup-volumes" title="Link to this heading">¶</a></h3>
<p>It has long been possible to specify that downloaded images and exported backups be stored in a custom volume on a particular storage pool.
It is now possible to specify these volumes on a per-project basis, allowing for images and backups to be stored in different custom volumes (and storage pools) for different projects.</p>
<p>Two new configuration keys have been introduced: <a class="configref reference internal" href="../../../server/#server-miscellaneous:storage.project.{name}.images_volume"><code class="docutils literal notranslate"><span class="pre">storage.project.{name}.images_volume</span></code></a> and <a class="configref reference internal" href="../../../server/#server-miscellaneous:storage.project.{name}.backups_volume"><code class="docutils literal notranslate"><span class="pre">storage.project.{name}.backups_volume</span></code></a> per each project, allowing for a storage volume on an existing pool to be used for storing the project-specific images and backups artifacts.</p>
<ul class="simple">
<li><p>API extension: <a class="reference internal" href="../../../api-extensions/#extension-daemon-storage-per-project"><span class="std std-ref">daemon_storage_per_project</span></a></p></li>
</ul>
</section>
<section id="ovn-internal-network-forward-and-load-balancers">
<h3>OVN internal network forward and load balancers<a class="headerlink" href="#ovn-internal-network-forward-and-load-balancers" title="Link to this heading">¶</a></h3>
<p>This release adds support for internal OVN load balancers and network forwards.
This approach allows <code class="docutils literal notranslate"><span class="pre">ovn</span></code> networks to define ports on internal IP addresses that can be forwarded to other internal IPs inside their respective networks.
This change removes the previous limitation on <code class="docutils literal notranslate"><span class="pre">ovn</span></code> networks that load balancers and network forwards could only use external IP addresses to forward to internal IPs.</p>
<ul class="simple">
<li><p>API extension: <a class="reference internal" href="../../../api-extensions/#extension-ovn-internal-load-balancer"><span class="std std-ref">ovn_internal_load_balancer</span></a></p></li>
</ul>
</section>
<section id="ovn-dhcp-ranges">
<h3>OVN DHCP ranges<a class="headerlink" href="#ovn-dhcp-ranges" title="Link to this heading">¶</a></h3>
<p>This release adds a new configuration key <a class="configref reference internal" href="../../network_ovn/#network-ovn-network-conf:ipv4.dhcp.ranges"><code class="docutils literal notranslate"><span class="pre">ipv4.dhcp.ranges</span></code></a> for <code class="docutils literal notranslate"><span class="pre">ovn</span></code> networks.
This key allows specifying a list of IPv4 ranges reserved for dynamic allocation using DHCP.
This is useful when setting up a <a class="reference internal" href="../../../howto/network_forwards/#network-forwards"><span class="std std-ref">network forward</span></a> towards a floating IP inside an <code class="docutils literal notranslate"><span class="pre">ovn</span></code> network that needs to be prevented from being allocated via DHCP.</p>
<ul class="simple">
<li><p>API extension: <a class="reference internal" href="../../../api-extensions/#extension-ovn-dhcp-ranges"><span class="std std-ref">ovn_dhcp_ranges</span></a></p></li>
</ul>
</section>
<section id="ovn-nic-acceleration-parent-interface-option">
<h3>OVN NIC acceleration parent interface option<a class="headerlink" href="#ovn-nic-acceleration-parent-interface-option" title="Link to this heading">¶</a></h3>
<p>This release adds support for specifying the OVN NIC acceleration physical function interfaces to allocate virtual functions from.</p>
<p>This avoids the need to add the physical function interfaces to the OVN integration bridge, which had prevented their use for host connectivity.</p>
<p>This change introduces a new configuration key for <code class="docutils literal notranslate"><span class="pre">ovn</span></code> networks and NICs:</p>
<ul class="simple">
<li><p><a class="configref reference internal" href="../../devices_nic/#device-nic-ovn-device-conf:acceleration.parent"><code class="docutils literal notranslate"><span class="pre">acceleration.parent</span></code></a> - Comma separated list of physical function (PF) interfaces from which to allocate virtual functions (VFs) from for hardware acceleration when <a class="configref reference internal" href="../../devices_nic/#device-nic-ovn-device-conf:acceleration"><code class="docutils literal notranslate"><span class="pre">acceleration</span></code></a> is enabled.</p></li>
<li><p>API extension: <a class="reference internal" href="../../../api-extensions/#extension-ovn-nic-acceleration-parent"><span class="std std-ref">ovn_nic_acceleration_parent</span></a></p></li>
</ul>
</section>
<section id="improved-oidc-authentication-provider-compatibility-using-sessions">
<h3>Improved OIDC authentication provider compatibility using sessions<a class="headerlink" href="#improved-oidc-authentication-provider-compatibility-using-sessions" title="Link to this heading">¶</a></h3>
<p>This release adds session support for OIDC authentication. This enables compatibility with identity providers that issue opaque access tokens.</p>
<p>When a session expires, LXD re-verifies the login with the identity provider.
The duration of OIDC sessions defaults to one week and can be configured via the <a class="configref reference internal" href="../../../server/#server-oidc:oidc.session.expiry"><code class="docutils literal notranslate"><span class="pre">oidc.session.expiry</span></code></a> configuration key.</p>
<p>Verification of an OIDC session depends on a new, cluster-wide core secret.</p>
<p>A new <a class="configref reference internal" href="../../../server/#server-core:core.auth_secret_expiry"><code class="docutils literal notranslate"><span class="pre">core.auth_secret_expiry</span></code></a> configuration controls how long a secret remains valid before it expires.
This sets the upper bound of an OIDC session duration.</p>
<ul class="simple">
<li><p>API extension: <a class="reference internal" href="../../../api-extensions/#extension-auth-oidc-sessions"><span class="std std-ref">auth_oidc_sessions</span></a></p></li>
</ul>
</section>
<section id="create-custom-filesystem-volume-from-tarball-contents">
<h3>Create custom filesystem volume from tarball contents<a class="headerlink" href="#create-custom-filesystem-volume-from-tarball-contents" title="Link to this heading">¶</a></h3>
<p>The <code class="docutils literal notranslate"><span class="pre">lxc</span> <span class="pre">storage</span> <span class="pre">volume</span> <span class="pre">import</span></code> command has gained support for creating a custom filesystem volume from the contents of a tarball.</p>
<p>A new supported value of <code class="docutils literal notranslate"><span class="pre">tar</span></code> has been added to the <code class="docutils literal notranslate"><span class="pre">--type</span></code> flag that causes the contents of the tarball to be unpacked into the newly created volume.</p>
<ul class="simple">
<li><p>API extension: <a class="reference internal" href="../../../api-extensions/#extension-import-custom-volume-tar"><span class="std std-ref">import_custom_volume_tar</span></a></p></li>
</ul>
</section>
<section id="forced-project-deletion">
<h3>Forced project deletion<a class="headerlink" href="#forced-project-deletion" title="Link to this heading">¶</a></h3>
<p>It is now possible to forcefully delete a project and all of its entities using the <code class="docutils literal notranslate"><span class="pre">lxc</span> <span class="pre">project</span> <span class="pre">delete</span> <span class="pre">&lt;project&gt;</span> <span class="pre">--force</span></code> command.</p>
<ul class="simple">
<li><p>API extension: <a class="reference internal" href="../../../api-extensions/#extension-projects-force-delete"><span class="std std-ref">projects_force_delete</span></a></p></li>
</ul>
</section>
<section id="operation-requestor-information">
<h3>Operation requestor information<a class="headerlink" href="#operation-requestor-information" title="Link to this heading">¶</a></h3>
<p>A new field <code class="docutils literal notranslate"><span class="pre">requestor</span></code> was added to operations, which contains information about the caller that initiated the operation.</p>
<ul class="simple">
<li><p>API extension: <a class="reference internal" href="../../../api-extensions/#extension-operation-requestor"><span class="std std-ref">operation_requestor</span></a></p></li>
</ul>
</section>
<section id="resources-disk-used-by-information">
<h3>Resources disk used by information<a class="headerlink" href="#resources-disk-used-by-information" title="Link to this heading">¶</a></h3>
<p>A new field <code class="docutils literal notranslate"><span class="pre">used_by</span></code> was added to disks in the resources API to indicate its potential use by any virtual parent device, such as <code class="docutils literal notranslate"><span class="pre">bcache</span></code>.</p>
<ul class="simple">
<li><p>API extension: <a class="reference internal" href="../../../api-extensions/#extension-resources-disk-used-by"><span class="std std-ref">resources_disk_used_by</span></a></p></li>
</ul>
</section>
</section>
<section id="ui-updates">
<h2>UI updates<a class="headerlink" href="#ui-updates" title="Link to this heading">¶</a></h2>
<p>This release includes several improvements and new features in the LXD UI.</p>
<section id="ssh-key-generation-during-instance-creation">
<h3>SSH key generation during instance creation<a class="headerlink" href="#ssh-key-generation-during-instance-creation" title="Link to this heading">¶</a></h3>
<p>The UI now supports generating SSH key pairs during instance creation, making it easier to configure instance access without relying on external tools.</p>
</section>
<section id="bulk-operations-view-details">
<h3>Bulk operations: View details<a class="headerlink" href="#bulk-operations-view-details" title="Link to this heading">¶</a></h3>
<p>Bulk actions now include an expanded <span class="guilabel">View details</span> interface, allowing you to inspect aggregated information and per-item results when managing multiple resources at once.
For example, when performing bulk instance deletion or bulk instance start, the UI now shows which instances succeeded, which failed, and any associated messages for each item.</p>
</section>
<section id="mobile-experience-improvements">
<h3>Mobile experience improvements<a class="headerlink" href="#mobile-experience-improvements" title="Link to this heading">¶</a></h3>
<p>Mobile-focused UI refinements improve navigation, responsiveness, and readability across smaller screens.</p>
</section>
<section id="login-project-selection-in-settings">
<h3>Login project selection in settings<a class="headerlink" href="#login-project-selection-in-settings" title="Link to this heading">¶</a></h3>
<p>A new login project setting is available in the <span class="guilabel">Settings</span>.
The selected project is stored in <code class="docutils literal notranslate"><span class="pre">localStorage</span></code>, ensuring the UI restores your working context on return.</p>
</section>
<section id="hpe-storage-driver-support">
<h3>HPE storage driver support<a class="headerlink" href="#hpe-storage-driver-support" title="Link to this heading">¶</a></h3>
<p>The UI now includes configuration and management support for the <span class="guilabel">HPE Alletra</span> storage driver, enabling pool and volume interaction for environments using this backend.</p>
</section>
<section id="saved-terminal-connection-defaults">
<h3>Saved terminal connection defaults<a class="headerlink" href="#saved-terminal-connection-defaults" title="Link to this heading">¶</a></h3>
<p>Users can now save terminal connection defaults as an instance user key, allowing persistent preferences for how the terminal connects to instances.</p>
</section>
<section id="acl-support-on-instances-and-profiles">
<h3>ACL support on instances and profiles<a class="headerlink" href="#acl-support-on-instances-and-profiles" title="Link to this heading">¶</a></h3>
<p><span class="guilabel">ACLs</span> can now be added directly on <span class="guilabel">Instances</span> and <span class="guilabel">Profiles</span>, not just at the network level, enabling more granular access control configuration directly.</p>
</section>
<section id="mtu-and-vlan-support-for-physical-networks">
<h3>MTU and VLAN support for physical networks<a class="headerlink" href="#mtu-and-vlan-support-for-physical-networks" title="Link to this heading">¶</a></h3>
<p>Physical network configuration forms now include <span class="guilabel">MTU</span> and <span class="guilabel">VLAN Id</span> fields, enabling more complete network definition from within the UI.</p>
</section>
<section id="project-configuration-restricted-backups">
<h3>Project configuration: restricted backups<a class="headerlink" href="#project-configuration-restricted-backups" title="Link to this heading">¶</a></h3>
<p>The <span class="guilabel">Configuration</span> screen now exposes the <span class="guilabel">Instance</span> option to restrict backup creation on a project.</p>
</section>
</section>
<section id="bug-fixes">
<span id="ref-release-notes-6-6-bugfixes"></span><h2>Bug fixes<a class="headerlink" href="#bug-fixes" title="Link to this heading">¶</a></h2>
<p>The following bug fixes are included in this release.</p>
<ul class="simple">
<li><p><a class="reference external" href="https://github.com/canonical/lxd/security/advisories/GHSA-3g2j-vm47-x4mj"><spellexception>Local privilege escalation through custom storage volumes (CVE-2025-64507)</spellexception></a></p></li>
<li><p><a class="reference external" href="https://github.com/canonical/lxd/issues/16902"><spellexception>Support for runc 1.3.3 inside containers</spellexception></a></p></li>
<li><p><a class="reference external" href="https://github.com/canonical/lxd/issues/16792"><spellexception>Missing path encoding in non-recursive API responses</spellexception></a></p></li>
<li><p><a class="reference external" href="https://github.com/canonical/lxd/issues/13497"><spellexception>S390x architecture name missing from architecture aliases</spellexception></a></p></li>
<li><p><a class="reference external" href="https://github.com/canonical/lxd/issues/12554"><spellexception>lxc init doesn't immediately fail on duplicated instance name if the source image is not cached</spellexception></a></p></li>
<li><p><a class="reference external" href="https://github.com/canonical/lxd/issues/15877"><spellexception>Restoring cluster member while evacuating breaks instance relationship with origin</spellexception></a></p></li>
<li><p><a class="reference external" href="https://github.com/canonical/lxd/issues/16642"><spellexception>Cluster healing stops network on member that triggers healing</spellexception></a></p></li>
<li><p><a class="reference external" href="https://github.com/canonical/lxd/issues/16227"><spellexception>NVIDIA CDI will not work with multiple GPUs when nvidia-persistenced is running</spellexception></a></p></li>
<li><p><a class="reference external" href="https://github.com/canonical/lxd/issues/14843"><spellexception>Containers do not start again when the host is not shut down properly nvidia CDI</spellexception></a></p></li>
<li><p><a class="reference external" href="https://github.com/canonical/lxd/issues/16481"><spellexception>Error parsing /proc/cpuinfo on Raspberry PI 5</spellexception></a></p></li>
<li><p><a class="reference external" href="https://github.com/canonical/lxd/issues/16614"><spellexception>Listing instances through fine grained TLS auth is not reliable at scale</spellexception></a></p></li>
<li><p><a class="reference external" href="https://github.com/canonical/lxd/issues/16477"><spellexception>Underlying storage uses 4096 bytes sector size when virtual machine images require 512 bytes</spellexception></a></p></li>
<li><p><a class="reference external" href="https://github.com/canonical/lxd/issues/15925"><spellexception>Forcibly stopping an instance should not spam logs about leftover sftp server</spellexception></a></p></li>
<li><p><a class="reference external" href="https://github.com/canonical/lxd/issues/16073"><spellexception>Concurrent (graphical) console connections to a VM don't close connections</spellexception></a></p></li>
<li><p><a class="reference external" href="https://github.com/canonical/lxd/issues/16159"><spellexception>Help does not reflect, that there is a difference between lxc shell and lxc exec</spellexception></a></p></li>
<li><p><a class="reference external" href="https://github.com/canonical/lxd/issues/16216"><spellexception>Network used by list incomplete</spellexception></a></p></li>
<li><p><a class="reference external" href="https://github.com/canonical/lxd/issues/15894"><spellexception>The fanotify mechanism does not notice dynamic removal of underlying devices</spellexception></a></p></li>
<li><p><a class="reference external" href="https://github.com/canonical/lxd/issues/16074"><spellexception>Removing a member from cluster group that is not in any other group silently ignores request</spellexception></a></p></li>
<li><p><a class="reference external" href="https://github.com/canonical/lxd/pull/16623"><spellexception>Prune cached images during project delete</spellexception></a></p></li>
</ul>
</section>
<section id="backwards-incompatible-changes">
<span id="ref-release-notes-6-6-incompatible"></span><h2>Backwards-incompatible changes<a class="headerlink" href="#backwards-incompatible-changes" title="Link to this heading">¶</a></h2>
<p>These changes are not compatible with older versions of LXD or its clients.</p>
<section id="asynchronous-storage-volume-and-profile-api-endpoints">
<h3>Asynchronous storage volume and profile API endpoints<a class="headerlink" href="#asynchronous-storage-volume-and-profile-api-endpoints" title="Link to this heading">¶</a></h3>
<p>Certain storage and profile endpoints that were previously synchronous now return an operation and behave asynchronously.</p>
<p>The latest LXD Go client detects the presence of this API extension. When it is available, the caller receives an operation object directly from the LXD server.
If the extension is not present on the server, then the server response is wrapped in a completed operation, allowing the caller to handle it as an operation while lacking a retrievable operation ID.</p>
<p>Older LXD Go clients are incompatible with servers that include this extension.
Instead of the expected successful response, they receive an operation response.</p>
<p>Endpoints converted to asynchronous behavior:</p>
<ul class="simple">
<li><p><code class="docutils literal notranslate"><span class="pre">POST</span> <span class="pre">/storage-pools/{pool}/volumes/{type}</span></code> - Create storage volume</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">PUT</span> <span class="pre">/storage-pools/{pool}/volumes/{type}/{vol}</span></code> - Update storage volume</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">PATCH</span> <span class="pre">/storage-pools/{pool}/volumes/{type}/{vol}</span></code> - Patch storage volume</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">POST</span> <span class="pre">/storage-pools/{pool}/volumes/{type}/{vol}</span></code> - Rename storage volume</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">DELETE</span> <span class="pre">/storage-pools/{pool}/volumes/{type}/{vol}</span></code> - Delete storage volume</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">PUT</span> <span class="pre">/storage-pools/{pool}/volumes/{type}/{vol}/snapshots/{snap}</span></code> - Update storage volume snapshot</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">PATCH</span> <span class="pre">/storage-pools/{pool}/volumes/{type}/{vol}/snapshots/{snap}</span></code> - Patch storage volume snapshot</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">PUT</span> <span class="pre">/1.0/profiles/{name}</span></code> - Update profile</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">PATCH</span> <span class="pre">/1.0/profiles/{name}</span></code> - Patch profile</p></li>
</ul>
<!-- end list -->
<ul class="simple">
<li><p>API extension: <a class="reference internal" href="../../../api-extensions/#extension-storage-and-profile-operations"><span class="std std-ref">storage_and_profile_operations</span></a></p></li>
</ul>
</section>
</section>
<section id="deprecated-features">
<span id="ref-release-notes-6-6-deprecated"></span><h2>Deprecated features<a class="headerlink" href="#deprecated-features" title="Link to this heading">¶</a></h2>
<p>These features are removed in this release.</p>
<section id="instance-placement-scriptlet-removed">
<h3>Instance placement scriptlet removed<a class="headerlink" href="#instance-placement-scriptlet-removed" title="Link to this heading">¶</a></h3>
<p>The instance placement scriptlet functionality (and the associated <code class="docutils literal notranslate"><span class="pre">instances_placement_scriptlet</span></code> API extension) has been removed in favor of the new <a class="reference internal" href="../../../explanation/clusters/#exp-clusters-placement"><span class="std std-ref">Placement groups</span></a> functionality.</p>
<p>If a scriptlet is set in the removed <code class="docutils literal notranslate"><span class="pre">instances.placement.scriptlet</span></code> configuration option, it is stored in the <code class="docutils literal notranslate"><span class="pre">user.instances.placement.script</span></code> configuration option when upgrading.</p>
</section>
</section>
<section id="updated-minimum-go-version">
<h2>Updated minimum Go version<a class="headerlink" href="#updated-minimum-go-version" title="Link to this heading">¶</a></h2>
<p>If you are building LXD from source instead of using a package manager, the minimum version of Go required to build LXD is now 1.25.4.</p>
</section>
<section id="snap-packaging-changes">
<h2>Snap packaging changes<a class="headerlink" href="#snap-packaging-changes" title="Link to this heading">¶</a></h2>
<ul class="simple">
<li><p>Settings to disable the AppArmor restricted user namespaces are persisted to <code class="docutils literal notranslate"><span class="pre">/run/sysctl.d/zz-lxd.conf</span></code></p></li>
<li><p>Dqlite bumped to <code class="docutils literal notranslate"><span class="pre">v1.18.3</span></code></p></li>
<li><p>LXC bumped to <code class="docutils literal notranslate"><span class="pre">v6.0.5</span></code></p></li>
<li><p>LXCFS bumped to <code class="docutils literal notranslate"><span class="pre">v6.0.5</span></code></p></li>
<li><p>Enable <code class="docutils literal notranslate"><span class="pre">lxcfs.pidfd=true</span></code> by default</p></li>
<li><p>LXD-UI bumped to <code class="docutils literal notranslate"><span class="pre">0.19</span></code></p></li>
<li><p>NVIDIA-container and toolkit bumped to <code class="docutils literal notranslate"><span class="pre">1.18.0</span></code></p></li>
<li><p>QEMU bumped to <code class="docutils literal notranslate"><span class="pre">8.2.2+ds-0ubuntu1.10</span></code></p></li>
<li><p>ZFS bumped to <code class="docutils literal notranslate"><span class="pre">zfs-2.3.4</span></code></p></li>
</ul>
</section>
<section id="change-log">
<span id="ref-release-notes-6-6-changelog"></span><h2>Change log<a class="headerlink" href="#change-log" title="Link to this heading">¶</a></h2>
<p>View the <a class="reference external" href="https://github.com/canonical/lxd/compare/lxd-6.5...lxd-6.6">complete list of all changes in this release</a>.</p>
</section>
<section id="downloads">
<h2>Downloads<a class="headerlink" href="#downloads" title="Link to this heading">¶</a></h2>
<p>The source tarballs and binary clients can be found on our <a class="reference external" href="https://github.com/canonical/lxd/releases/tag/lxd-6.6">download page</a>.</p>
<p>Binary packages are also available for:</p>
<ul class="simple">
<li><p><strong>Linux:</strong> <code class="docutils literal notranslate"><span class="pre">snap</span> <span class="pre">install</span> <span class="pre">lxd</span> <span class="pre">--channel=6/stable</span></code></p></li>
<li><p><strong>MacOS client:</strong> <code class="docutils literal notranslate"><span class="pre">brew</span> <span class="pre">install</span> <span class="pre">lxc</span></code></p></li>
<li><p><strong>Windows client:</strong> <code class="docutils literal notranslate"><span class="pre">choco</span> <span class="pre">install</span> <span class="pre">lxc</span></code></p></li>
</ul>
</section>
</section>

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       Contents
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      <div class="toc-tree">
        <ul>
<li><a class="reference internal" href="#">LXD 6.6 release notes</a><ul>
<li><a class="reference internal" href="#highlights">Highlights</a><ul>
<li><a class="reference internal" href="#instance-placement-groups">Instance placement groups</a></li>
<li><a class="reference internal" href="#placement-cluster-member-group-recorded">Placement cluster member group recorded</a></li>
<li><a class="reference internal" href="#kubernetes-container-storage-interface-csi-driver-and-dev-lxd-volume-management">Kubernetes Container Storage Interface (CSI) driver and <code class="docutils literal notranslate"><span class="pre">/dev/lxd</span></code> volume management</a></li>
<li><a class="reference internal" href="#custom-storage-volume-recovery-improvements">Custom storage volume recovery improvements</a></li>
<li><a class="reference internal" href="#consistent-instance-and-custom-volume-snapshots">Consistent instance and custom volume snapshots</a></li>
<li><a class="reference internal" href="#hpe-alletra-storage-driver">HPE Alletra storage driver</a></li>
<li><a class="reference internal" href="#persistent-vm-pcie-bus-allocation">Persistent VM PCIe bus allocation</a></li>
<li><a class="reference internal" href="#per-project-image-and-backup-volumes">Per-project image and backup volumes</a></li>
<li><a class="reference internal" href="#ovn-internal-network-forward-and-load-balancers">OVN internal network forward and load balancers</a></li>
<li><a class="reference internal" href="#ovn-dhcp-ranges">OVN DHCP ranges</a></li>
<li><a class="reference internal" href="#ovn-nic-acceleration-parent-interface-option">OVN NIC acceleration parent interface option</a></li>
<li><a class="reference internal" href="#improved-oidc-authentication-provider-compatibility-using-sessions">Improved OIDC authentication provider compatibility using sessions</a></li>
<li><a class="reference internal" href="#create-custom-filesystem-volume-from-tarball-contents">Create custom filesystem volume from tarball contents</a></li>
<li><a class="reference internal" href="#forced-project-deletion">Forced project deletion</a></li>
<li><a class="reference internal" href="#operation-requestor-information">Operation requestor information</a></li>
<li><a class="reference internal" href="#resources-disk-used-by-information">Resources disk used by information</a></li>
</ul>
</li>
<li><a class="reference internal" href="#ui-updates">UI updates</a><ul>
<li><a class="reference internal" href="#ssh-key-generation-during-instance-creation">SSH key generation during instance creation</a></li>
<li><a class="reference internal" href="#bulk-operations-view-details">Bulk operations: View details</a></li>
<li><a class="reference internal" href="#mobile-experience-improvements">Mobile experience improvements</a></li>
<li><a class="reference internal" href="#login-project-selection-in-settings">Login project selection in settings</a></li>
<li><a class="reference internal" href="#hpe-storage-driver-support">HPE storage driver support</a></li>
<li><a class="reference internal" href="#saved-terminal-connection-defaults">Saved terminal connection defaults</a></li>
<li><a class="reference internal" href="#acl-support-on-instances-and-profiles">ACL support on instances and profiles</a></li>
<li><a class="reference internal" href="#mtu-and-vlan-support-for-physical-networks">MTU and VLAN support for physical networks</a></li>
<li><a class="reference internal" href="#project-configuration-restricted-backups">Project configuration: restricted backups</a></li>
</ul>
</li>
<li><a class="reference internal" href="#bug-fixes">Bug fixes</a></li>
<li><a class="reference internal" href="#backwards-incompatible-changes">Backwards-incompatible changes</a><ul>
<li><a class="reference internal" href="#asynchronous-storage-volume-and-profile-api-endpoints">Asynchronous storage volume and profile API endpoints</a></li>
</ul>
</li>
<li><a class="reference internal" href="#deprecated-features">Deprecated features</a><ul>
<li><a class="reference internal" href="#instance-placement-scriptlet-removed">Instance placement scriptlet removed</a></li>
</ul>
</li>
<li><a class="reference internal" href="#updated-minimum-go-version">Updated minimum Go version</a></li>
<li><a class="reference internal" href="#snap-packaging-changes">Snap packaging changes</a></li>
<li><a class="reference internal" href="#change-log">Change log</a></li>
<li><a class="reference internal" href="#downloads">Downloads</a></li>
</ul>
</li>
</ul>

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