d85daf0f4c
From current AWS documentation: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/volume_limits.html T3, C5, C5d, M5, M5d, R5, R5d, and z1d instances support a maximum of 28 attachments, and every instance has at least one network interface attachment. If you have no additional network interface attachments on these instances, you could attach 27 EBS volumes.
64 lines
2.4 KiB
Go
64 lines
2.4 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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// EBSVolumeLimitKey resource name that will store volume limits for EBS
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EBSVolumeLimitKey = "attachable-volumes-aws-ebs"
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// EBSNitroLimitRegex finds nitro instance types with different limit than EBS defaults
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EBSNitroLimitRegex = "^[cmr]5.*|t3|z1d"
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// DefaultMaxEBSVolumes is the limit for volumes attached to an instance.
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// Amazon recommends no more than 40; the system root volume uses at least one.
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// See http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/volume_limits.html#linux-specific-volume-limits
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DefaultMaxEBSVolumes = 39
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// DefaultMaxEBSM5VolumeLimit is default EBS volume limit on m5 and c5 instances
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DefaultMaxEBSNitroVolumeLimit = 25
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// AzureVolumeLimitKey stores resource name that will store volume limits for Azure
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AzureVolumeLimitKey = "attachable-volumes-azure-disk"
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// GCEVolumeLimitKey stores resource name that will store volume limits for GCE node
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GCEVolumeLimitKey = "attachable-volumes-gce-pd"
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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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