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volume_finder.go
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volume_finder.go
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/*
Copyright (c) 2022-2023 Dell Inc. or its subsidiaries. All Rights Reserved.
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 k8s
import (
"context"
"github.com/sirupsen/logrus"
corev1 "k8s.io/api/core/v1"
)
// VolumeGetter is an interface for getting a list of persistent volume information
//
//go:generate mockgen -destination=mocks/volume_getter_mocks.go -package=mocks github.com/dell/csm-metrics-powermax/internal/k8s VolumeGetter
type VolumeGetter interface {
GetPersistentVolumes() (*corev1.PersistentVolumeList, error)
}
// VolumeFinder is a volume finder that will query the Kubernetes API for Persistent Volumes created by a matching DriverName and StorageSystemID
type VolumeFinder struct {
API VolumeGetter
DriverNames []string
Logger *logrus.Logger
}
// VolumeInfo contains information about mapping a Persistent Volume to the volume created on a storage system
type VolumeInfo struct {
Namespace string `json:"namespace"`
PersistentVolumeClaim string `json:"persistent_volume_claim"`
PersistentVolumeStatus string `json:"volume_status"`
VolumeClaimName string `json:"volume_claim_name"`
PersistentVolume string `json:"persistent_volume"`
StorageClass string `json:"storage_class"`
Driver string `json:"driver"`
ProvisionedSize string `json:"provisioned_size"`
CreatedTime string `json:"created_time"`
VolumeHandle string `json:"volume_handle"`
SRP string `json:"srp"`
ServiceLevel string `json:"service_level"`
StorageGroup string `json:"storage_group"`
SymID string `json:"symid"`
}
// GetPersistentVolumes will return a list of persistent volume information
func (f VolumeFinder) GetPersistentVolumes(_ context.Context) ([]VolumeInfo, error) {
volumeInfo := make([]VolumeInfo, 0)
volumes, err := f.API.GetPersistentVolumes()
if err != nil {
return nil, err
}
for _, volume := range volumes.Items {
if volume.Spec.CSI == nil {
f.Logger.Debugf("The PV, %s , is not provisioned by a CSI driver\n", volume.GetName())
continue
}
// Check added to skip PV s which do not have any PVC s
if volume.Spec.ClaimRef == nil {
f.Logger.Debugf("The PV, %s , do not have a claim \n", volume.GetName())
continue
}
if contains(f.DriverNames, volume.Spec.CSI.Driver) {
capacity := volume.Spec.Capacity[corev1.ResourceStorage]
claim := volume.Spec.ClaimRef
status := volume.Status
srp, _ := volume.Spec.CSI.VolumeAttributes["SRP"]
serviceLevel, _ := volume.Spec.CSI.VolumeAttributes["ServiceLevel"]
storageGroup, _ := volume.Spec.CSI.VolumeAttributes["StorageGroup"]
symID, _ := volume.Spec.CSI.VolumeAttributes["powermax/SYMID"]
info := VolumeInfo{
Namespace: claim.Namespace,
PersistentVolumeClaim: string(claim.UID),
VolumeClaimName: claim.Name,
PersistentVolumeStatus: string(status.Phase),
PersistentVolume: volume.Name,
StorageClass: volume.Spec.StorageClassName,
Driver: volume.Spec.CSI.Driver,
ProvisionedSize: capacity.String(),
CreatedTime: volume.CreationTimestamp.String(),
VolumeHandle: volume.Spec.CSI.VolumeHandle,
SRP: srp,
ServiceLevel: serviceLevel,
StorageGroup: storageGroup,
SymID: symID,
}
volumeInfo = append(volumeInfo, info)
}
}
return volumeInfo, nil
}
func contains(slice []string, value string) bool {
for _, element := range slice {
if element == value {
return true
}
}
return false
}