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https://github.com/ceph/ceph-csi.git
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1406f29dcd
and to also inmprove the code reuse in rbd itself. Signed-off-by: ShyamsundarR <srangana@redhat.com>
115 lines
3.1 KiB
Go
115 lines
3.1 KiB
Go
/*
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Copyright 2019 The Ceph-CSI Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package util
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import (
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"os"
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"path"
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"strings"
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"github.com/pkg/errors"
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"k8s.io/apimachinery/pkg/util/validation"
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"k8s.io/klog"
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)
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// remove this once kubernetes v1.14.0 release is done
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// https://github.com/kubernetes/cloud-provider/blob/master/volume/helpers/rounding.go
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const (
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// MiB - MebiByte size
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MiB = 1024 * 1024
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)
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// RoundUpToMiB rounds up given quantity upto chunks of MiB
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func RoundUpToMiB(size int64) int64 {
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requestBytes := size
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return roundUpSize(requestBytes, MiB)
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}
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func roundUpSize(volumeSizeBytes int64, allocationUnitBytes int64) int64 {
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roundedUp := volumeSizeBytes / allocationUnitBytes
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if volumeSizeBytes%allocationUnitBytes > 0 {
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roundedUp++
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}
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return roundedUp
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}
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// CreatePersistanceStorage creates storage path and initializes new cache
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func CreatePersistanceStorage(sPath, metaDataStore, driverName string) (CachePersister, error) {
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var err error
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if err = createPersistentStorage(path.Join(sPath, "controller")); err != nil {
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klog.Errorf("failed to create persistent storage for controller: %v", err)
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return nil, err
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}
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if err = createPersistentStorage(path.Join(sPath, "node")); err != nil {
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klog.Errorf("failed to create persistent storage for node: %v", err)
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return nil, err
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}
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cp, err := NewCachePersister(metaDataStore, driverName)
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if err != nil {
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klog.Errorf("failed to define cache persistence method: %v", err)
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return nil, err
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}
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return cp, err
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}
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func createPersistentStorage(persistentStoragePath string) error {
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return os.MkdirAll(persistentStoragePath, os.FileMode(0755))
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}
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// ValidateDriverName validates the driver name
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func ValidateDriverName(driverName string) error {
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if len(driverName) == 0 {
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return errors.New("driver name is empty")
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}
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if len(driverName) > 63 {
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return errors.New("driver name length should be less than 63 chars")
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}
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var err error
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for _, msg := range validation.IsDNS1123Subdomain(strings.ToLower(driverName)) {
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if err == nil {
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err = errors.New(msg)
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continue
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}
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err = errors.Wrap(err, msg)
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}
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return err
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}
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// GenerateVolID generates a volume ID based on passed in parameters and version, to be returned
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// to the CO system
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func GenerateVolID(monitors, id, key, pool, clusterID, objUUID string, volIDVersion uint16) (string, error) {
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poolID, err := GetPoolID(monitors, id, key, pool)
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if err != nil {
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return "", err
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}
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// generate the volume ID to return to the CO system
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vi := CSIIdentifier{
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PoolID: poolID,
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EncodingVersion: volIDVersion,
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ClusterID: clusterID,
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ObjectUUID: objUUID,
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}
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volID, err := vi.ComposeCSIID()
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return volID, err
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}
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