scheduler: add image zone filter

pkg/scheduler/algorithm/predicates/guest/image_predicate.go

@@ -0,0 +1,83 @@
+// Copyright 2019 Yunion
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package guest
+
+import (
+	"fmt"
+
+	"yunion.io/x/pkg/utils"
+
+	"yunion.io/x/onecloud/pkg/apis/compute"
+	"yunion.io/x/onecloud/pkg/cloudprovider"
+	"yunion.io/x/onecloud/pkg/compute/models"
+	"yunion.io/x/onecloud/pkg/scheduler/algorithm/predicates"
+	"yunion.io/x/onecloud/pkg/scheduler/core"
+)
+
+type ImagePredicate struct {
+	predicates.BasePredicate
+	cacheImage *models.SCachedimage
+	zones      []string
+}
+
+func (f *ImagePredicate) Name() string {
+	return "disk_image"
+}
+
+func (f *ImagePredicate) Clone() core.FitPredicate {
+	return &ImagePredicate{}
+}
+
+func (f *ImagePredicate) PreExecute(u *core.Unit, cs []core.Candidater) (bool, error) {
+	disks := u.SchedData().Disks
+	if len(disks) == 0 {
+		return false, nil
+	}
+	imageId := disks[0].ImageId
+	if len(imageId) == 0 || u.SchedData().PreferZone != "" {
+		return false, nil
+	}
+	if !utils.IsInStringArray(u.SchedData().Hypervisor, compute.PUBLIC_CLOUD_HYPERVISORS) {
+		return false, nil
+	}
+	obj, err := models.CachedimageManager.FetchById(imageId)
+	if err != nil {
+		return false, fmt.Errorf("Fetch CachedImage %s: %v", imageId, err)
+	}
+	cacheImage := obj.(*models.SCachedimage)
+	if cacheImage.ImageType != cloudprovider.CachedImageTypeSystem {
+		return false, nil
+	}
+	zones, err := cacheImage.GetUsableZoneIds()
+	if err != nil {
+		return false, fmt.Errorf("Fetch CachedImage %s zones: %v", cacheImage.GetName(), err)
+	}
+	f.cacheImage = cacheImage
+	f.zones = zones
+	return true, nil
+}
+
+func (f *ImagePredicate) Execute(u *core.Unit, c core.Candidater) (bool, []core.PredicateFailureReason, error) {
+	h := predicates.NewPredicateHelper(f, u, c)
+	inZone := false
+	hostZoneId := c.Getter().Zone().GetId()
+	if utils.IsInStringArray(hostZoneId, f.zones) {
+		inZone = true
+	}
+	if !inZone {
+		h.Exclude(fmt.Sprintf("Host zone %s not in image usable zones %v", hostZoneId, f.zones))
+	}
+	return h.GetResult()
+}