fix: prefetch image error when create guest with vmware template

1. Only need the corresponding vmware template in the vcenter where the host is
located.
2. Chose storagecache which cacheimage is ready before deploying.

pkg/compute/guestdrivers/esxi.go

@@ -172,7 +172,7 @@ func (self *SESXiGuestDriver) GetJsonDescAtHost(ctx context.Context, userCred mc
 	if img.ImageType != cloudprovider.CachedImageTypeSystem {
 		return desc
 	}
-	sciSubQ := models.StoragecachedimageManager.Query("storagecache_id").Equals("cachedimage_id", templateId).SubQuery()
+	sciSubQ := models.StoragecachedimageManager.Query("storagecache_id").Equals("cachedimage_id", templateId).Equals("status", api.CACHED_IMAGE_STATUS_READY).SubQuery()
 	scQ := models.StoragecacheManager.Query().In("id", sciSubQ)
 	storageCaches := make([]models.SStoragecache, 0, 1)
 	err = db.FetchModelObjects(models.StoragecacheManager, scQ, &storageCaches)

pkg/hostman/storageman/imagecachemanager_agent.go

@@ -221,7 +221,11 @@ func (c *SAgentImageCacheManager) perfetchTemplateVMImageCache(ctx context.Conte
 	if err != nil {
 		return nil, err
 	}
-	_, err = host.GetTemplateVMById(data.ImageExternalId)
+	dc, err := host.GetDatacenter()
+	if err != nil {
+		return nil, errors.Wrap(err, "host.GetDatacenter")
+	}
+	_, err = dc.GetTemplateVMById(data.ImageExternalId)
 	if err != nil {
 		return nil, err
 	}

pkg/multicloud/esxi/datacenter.go

@@ -364,3 +364,41 @@ func (dc *SDatacenter) GetNetworks() ([]IVMNetwork, error) {
 	}
 	return dc.inetworks, nil
 }
+
+func (dc *SDatacenter) GetTemplateVMs() ([]*SVirtualMachine, error) {
+	hosts, err := dc.GetIHosts()
+	if err != nil {
+		return nil, errors.Wrap(err, "SDatacenter.GetIHosts")
+	}
+	templateVms := make([]*SVirtualMachine, 5)
+	for _, ihost := range hosts {
+		host := ihost.(*SHost)
+		tvms, err := host.GetTemplateVMs()
+		if err != nil {
+			return nil, errors.Wrap(err, "host.GetTemplateVMs")
+		}
+		templateVms = append(templateVms, tvms...)
+	}
+	return templateVms, nil
+}
+
+func (dc *SDatacenter) GetTemplateVMById(id string) (*SVirtualMachine, error) {
+	id = dc.manager.getPrivateId(id)
+	hosts, err := dc.GetIHosts()
+	if err != nil {
+		return nil, errors.Wrap(err, "SDatacenter.GetIHosts")
+	}
+	for _, ihost := range hosts {
+		host := ihost.(*SHost)
+		tvms, err := host.GetTemplateVMs()
+		if err != nil {
+			return nil, errors.Wrap(err, "host.GetTemplateVMs")
+		}
+		for i := range tvms {
+			if tvms[i].GetGlobalId() == id {
+				return tvms[i], nil
+			}
+		}
+	}
+	return nil, cloudprovider.ErrNotFound
+}