Adds a new checkbox to the migration dialog, if it is a
live/online-migration and both the source and target nodes have support
for our dbus-vmstate helper.

If the checkbox is active, it passes along the `with-conntrack-state`
parameter to the migrate API call.

Signed-off-by: Christoph Heiss <c.he...@proxmox.com>
---
 www/manager6/window/Migrate.js | 73 ++++++++++++++++++++++++++++++++--
 1 file changed, 69 insertions(+), 4 deletions(-)

diff --git a/www/manager6/window/Migrate.js b/www/manager6/window/Migrate.js
index 78d03921e..e8a68eed9 100644
--- a/www/manager6/window/Migrate.js
+++ b/www/manager6/window/Migrate.js
@@ -28,8 +28,9 @@ Ext.define('PVE.window.Migrate', {
                allowedNodes: undefined,
                overwriteLocalResourceCheck: false,
                hasLocalResources: false,
+               withConntrackState: true,
+               bothHaveDbusVmstate: false,
            },
-
        },
 
        formulas: {
@@ -59,6 +60,9 @@ Ext.define('PVE.window.Migrate', {
                    return false;
                }
            },
+           conntrackStateCheckboxHidden: get =>
+               !get('running') || get('vmtype') !== 'qemu' ||
+               !get('migration.bothHaveDbusVmstate'),
        },
     },
 
@@ -133,6 +137,10 @@ Ext.define('PVE.window.Migrate', {
                params.force = 1;
            }
 
+           if (vm.get('migration.bothHaveDbusVmstate') && 
vm.get('migration.withConntrackState')) {
+               params['with-conntrack-state'] = 1;
+           }
+
            Proxmox.Utils.API2Request({
                params: params,
                url: '/nodes/' + vm.get('nodename') + '/' + vm.get('vmtype') + 
'/' + vm.get('vmid') + '/migrate',
@@ -199,12 +207,28 @@ Ext.define('PVE.window.Migrate', {
                    method: 'GET',
                });
                migrateStats = result.data;
-               me.fetchingNodeMigrateInfo = false;
            } catch (error) {
                Ext.Msg.alert(gettext('Error'), error.htmlStatus);
+               me.fetchingNodeMigrateInfo = false;
                return;
            }
 
+           const target = me.lookup('pveNodeSelector').value;
+           let targetCapabilities = {};
+
+           try {
+               const { result } = await Proxmox.Async.api2({
+                   url: `/nodes/${target}/capabilities/qemu/migration`,
+                   method: 'GET',
+               });
+               targetCapabilities = result.data;
+           } catch (err) {
+               // In the case the target node does not (yet) support the
+               // `capabilites/qemu/migration` endpoint, just ignore it.
+           }
+
+           me.fetchingNodeMigrateInfo = false;
+
            if (migrateStats.running) {
                vm.set('running', true);
            }
@@ -217,7 +241,6 @@ Ext.define('PVE.window.Migrate', {
 
            if (migrateStats.allowed_nodes) {
                migration.allowedNodes = migrateStats.allowed_nodes;
-               let target = me.lookup('pveNodeSelector').value;
                if (target.length && 
!migrateStats.allowed_nodes.includes(target)) {
                    let disallowed = migrateStats.not_allowed_nodes[target] ?? 
{};
                    if (disallowed.unavailable_storages !== undefined) {
@@ -303,6 +326,29 @@ Ext.define('PVE.window.Migrate', {
                });
            }
 
+           migration.bothHaveDbusVmstate = migrateStats['has-dbus-vmstate'] && 
targetCapabilities['has-dbus-vmstate'];
+           if (vm.get('running')) {
+               if (migration.withConntrackState && 
!migrateStats['has-dbus-vmstate']) {
+                   migration.preconditions.push({
+                       text: gettext('Cannot migrate conntrack state, source 
node is lacking support. Active network connections might get dropped.'),
+                       severity: 'warning',
+                   });
+               }
+               if (migration.withConntrackState && 
!targetCapabilities['has-dbus-vmstate']) {
+                   migration.preconditions.push({
+                       text: gettext('Cannot migrate conntrack state, target 
node is lacking support. Active network connections might get dropped.'),
+                       severity: 'warning',
+                   });
+               }
+
+               if (migration.bothHaveDbusVmstate && 
!migration.withConntrackState) {
+                   migration.preconditions.push({
+                       text: gettext('Conntrack state migration disabled. 
Active network connections might get dropped.'),
+                       severity: 'warning',
+                   });
+               }
+           }
+
            vm.set('migration', migration);
        },
        checkLxcPreconditions: function(resetMigrationPossible) {
@@ -394,7 +440,26 @@ Ext.define('PVE.window.Migrate', {
                                extraArg: true,
                            },
                        },
-               }],
+                   },
+                   {
+                       xtype: 'proxmoxcheckbox',
+                       name: 'withConntrackState',
+                       fieldLabel: gettext('Conntrack state'),
+                       autoEl: {
+                           tag: 'div',
+                           'data-qtip': gettext('Enables live migration of 
conntrack entries for this VM.'),
+                       },
+                       bind: {
+                           hidden: '{conntrackStateCheckboxHidden}',
+                           value: '{migration.withConntrackState}',
+                       },
+                       listeners: {
+                           change: {
+                               fn: 'checkMigratePreconditions',
+                               extraArg: true,
+                           },
+                       },
+                   }],
                },
            ],
        },
-- 
2.48.1



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