[pve-devel] [PATCH v2 docs 2/2] vzdump: add section about single file restore

Stefan Reiter s.reiter at proxmox.com
Thu Apr 22 14:21:28 CEST 2021

Signed-off-by: Stefan Reiter <s.reiter at proxmox.com>
Reviewed-by: Dylan Whyte <d.whyte at proxmox.com>
* Incorporate Dylan's review + R-b

 vzdump.adoc | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/vzdump.adoc b/vzdump.adoc
index b8ea081..0937fe2 100644
--- a/vzdump.adoc
+++ b/vzdump.adoc
@@ -365,6 +365,30 @@ amount of data is required for initial operation, e.g. web servers - once the OS
 and necessary services have been started, the VM is operational, while the
 background task continues copying seldomly used data.
+Single File Restore
+The 'File Restore' button in the 'Backups' tab of the storage GUI can be used to
+open a file browser directly on the data contained in a backup. This feature
+is only available for backups on a Proxmox Backup Server.
+For containers, the first layer of the file tree shows all included 'pxar'
+archives, which can be opened and browsed freely. For VMs, the first layer shows
+contained drive images, which can be opened to reveal a list of supported
+storage technologies found on the drive. In the most basic case, this will be an
+entry called 'part', representing a partition table, which contains entries for
+each partition found on the drive. Note that for VMs, not all data might be
+accessible (unsupported guest file systems, storage technologies, etc...).
+Files and directories can be downloaded using the 'Download' button, the latter
+being compressed into a zip archive on the fly.
+To enable secure access to VM images, which might contain untrusted data, a
+temporary VM (not visible as a guest) is started. This does not mean that data
+downloaded from such an archive is inherently safe, but it avoids exposing the
+hypervisor system to danger. The VM will stop itself after a timeout. This
+entire process happens transparently from a user's point of view.

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