[pve-devel] [PATCH manager 12/14] ui: window: Migrate: add checkbox for migrating VM conntrack state

[Christoph Heiss]

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.heiss at 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