diff --git a/pkg/compute/models/guestnetworks.go b/pkg/compute/models/guestnetworks.go
index c2b68fc225..1f1a61c8bb 100644
--- a/pkg/compute/models/guestnetworks.go
+++ b/pkg/compute/models/guestnetworks.go
@@ -372,9 +372,11 @@ func (self *SGuestnetwork) getJsonDescAtHost(host *SHost) jsonutils.JSONObject {
 
 func (self *SGuestnetwork) getJsonDescHostwire(network *SNetwork, hostwire *SHostwire) *jsonutils.JSONDict {
 	desc := self.getJsonDesc(network)
-	desc.Add(jsonutils.NewString(hostwire.Bridge), "bridge")
-	desc.Add(jsonutils.NewString(hostwire.WireId), "wire_id")
-	desc.Add(jsonutils.NewString(hostwire.Interface), "interface")
+	if hostwire != nil {
+		desc.Add(jsonutils.NewString(hostwire.Bridge), "bridge")
+		desc.Add(jsonutils.NewString(hostwire.WireId), "wire_id")
+		desc.Add(jsonutils.NewString(hostwire.Interface), "interface")
+	}
 	return desc
 }
 
diff --git a/pkg/hostman/hostinfo/hostinfo.go b/pkg/hostman/hostinfo/hostinfo.go
index 6904c2dd04..7f41393d4b 100644
--- a/pkg/hostman/hostinfo/hostinfo.go
+++ b/pkg/hostman/hostinfo/hostinfo.go
@@ -856,6 +856,9 @@ func (h *SHostInfo) updateHostRecord(hostId string) {
 		h.onFail(err)
 	}
 	content.Set("mem_size", jsonutils.NewInt(int64(memTotal)))
+	if len(hostId) == 0 {
+		content.Set("mem_reserved", jsonutils.NewInt(int64(h.getReservedMem())))
+	}
 	content.Set("storage_driver", jsonutils.NewString(api.DISK_DRIVER_LINUX))
 	content.Set("storage_type", jsonutils.NewString(h.sysinfo.StorageType))
 	content.Set("storage_size", jsonutils.NewInt(int64(storageman.GetManager().GetTotalCapacity())))
diff --git a/pkg/hostman/storageman/storage_rbd.go b/pkg/hostman/storageman/storage_rbd.go
index 1e9f9e596d..27dbe41dfa 100644
--- a/pkg/hostman/storageman/storage_rbd.go
+++ b/pkg/hostman/storageman/storage_rbd.go
@@ -59,6 +59,10 @@ type SRbdStorage struct {
 func NewRBDStorage(manager *SStorageManager, path string) *SRbdStorage {
 	var ret = new(SRbdStorage)
 	ret.SBaseStorage = *NewBaseStorage(manager, path)
+	err := procutils.NewRemoteCommandAsFarAsPossible("mkdir", "-p", "/etc/ceph").Run()
+	if err != nil {
+		log.Errorf("Failed to mkdir /etc/ceph: %s", err)
+	}
 	return ret
 }