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49 lines
1.5 KiB
Go
49 lines
1.5 KiB
Go
/*
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Copyright 2018 The Kubernetes 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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"crypto/sha1"
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"encoding/hex"
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)
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// This file is a common place holder for volume limit utility constants
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// shared between volume package and scheduler
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const (
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// CSIAttachLimitPrefix defines prefix used for CSI volumes
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CSIAttachLimitPrefix = "attachable-volumes-csi-"
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// ResourceNameLengthLimit stores maximum allowed Length for a ResourceName
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ResourceNameLengthLimit = 63
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)
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// GetCSIAttachLimitKey returns limit key used for CSI volumes
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func GetCSIAttachLimitKey(driverName string) string {
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csiPrefixLength := len(CSIAttachLimitPrefix)
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totalkeyLength := csiPrefixLength + len(driverName)
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if totalkeyLength >= ResourceNameLengthLimit {
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charsFromDriverName := driverName[:23]
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hash := sha1.New()
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hash.Write([]byte(driverName))
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hashed := hex.EncodeToString(hash.Sum(nil))
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hashed = hashed[:16]
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return CSIAttachLimitPrefix + charsFromDriverName + hashed
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}
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return CSIAttachLimitPrefix + driverName
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}
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