[pve-devel] [PATCH pve-manager] fix #6379: apply vzdump.conf compress default to GUI.

[Nicolas Frey]

Ensure the GUI uses the default 'compress' value in /etc/vzdump.conf
for manual backups and Backup Jobs, matching vzdump CLI behavior.

Backup Jobs continue to use the cluster-wide default of 'zstd'.
When a single node is selected, the job now uses that node's default
'compress' value from /etc/vzdump.conf.

Fixes: https://bugzilla.proxmox.com/show_bug.cgi?id=6379

Signed-off-by: Nicolas Frey <n.frey at proxmox.com>
---
 www/manager6/dc/Backup.js     | 21 +++++++++++++++++++++
 www/manager6/window/Backup.js |  3 +++
 2 files changed, 24 insertions(+)

diff --git a/www/manager6/dc/Backup.js b/www/manager6/dc/Backup.js
index 956a7cdf..7cca08ca 100644
--- a/www/manager6/dc/Backup.js
+++ b/www/manager6/dc/Backup.js
@@ -76,6 +76,27 @@ Ext.define('PVE.dc.BackupEdit', {
             if (mode === 'pool') {
                 me.selectPoolMembers();
             }
+
+            let compressionSelector = me.lookup('compressionSelector');
+            if (value !== undefined && value !== '' && value !== null) {
+                Proxmox.Utils.API2Request({
+                    url: `/nodes/${value}/vzdump/defaults`,
+                    method: 'GET',
+                    success: function (response, _) {
+                        const data = response.result.data;
+
+                        if (data.compress !== undefined) {
+                            compressionSelector.setValue(data.compress);
+                        }
+                    },
+                    failure: function (response, _) {
+                        Ext.Msg.alert(gettext('Error'), response.htmlStatus);
+                    },
+                });
+            } else {
+                // default value for cluster-wide backup
+                compressionSelector.setValue('zstd');
+            }
         },
 
         storageChange: function (f, v) {
diff --git a/www/manager6/window/Backup.js b/www/manager6/window/Backup.js
index 65ec9659..cf6d4e4c 100644
--- a/www/manager6/window/Backup.js
+++ b/www/manager6/window/Backup.js
@@ -193,6 +193,9 @@ Ext.define('PVE.window.Backup', {
                                     PVE.Utils.unEscapeNotesTemplate(data['notes-template']),
                                 );
                             }
+                            if (!initialDefaults && data.compress !== undefined) {
+                                compressionSelector.setValue(data.compress);
+                            }
 
                             initialDefaults = true;
 
-- 
2.47.3