feat(xo-server/backup-ng): log scheduled VMs if concurrency above 0 (#3633)

See #3603

packages/xo-server/src/schemas/log/taskInfo.js

@@ -0,0 +1,15 @@
+export default {
+  $schema: 'http://json-schema.org/draft-04/schema#',
+  type: 'object',
+  properties: {
+    event: {
+      enum: ['task.info'],
+    },
+    taskId: {
+      type: 'string',
+      description: 'identifier of the parent task or job',
+    },
+    data: {},
+  },
+  required: ['event', 'taskId'],
+}

packages/xo-server/src/xo-mixins/backups-ng-logs.js

@@ -129,6 +129,13 @@ export default {
             data: data.data,
             message,
           })
+      } else if (event === 'task.info') {
+        const parent = started[data.taskId]
+        parent !== undefined &&
+          (parent.infos || (parent.infos = [])).push({
+            data: data.data,
+            message,
+          })
       } else if (event === 'jobCall.start') {
         const parent = started[data.runJobId]
         if (parent !== undefined) {

packages/xo-server/src/xo-mixins/backups-ng/index.js

@@ -646,6 +646,13 @@ export default class BackupNg {
         ])
         if (concurrency !== 0) {
           handleVm = limitConcurrency(concurrency)(handleVm)
+          logger.notice('vms', {
+            event: 'task.info',
+            taskId: runJobId,
+            data: {
+              vms: vms.map(vm => vm.id),
+            },
+          })
         }
         await asyncMap(vms, handleVm)
       }