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machine_types.go
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machine_types.go
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/*
Copyright 2019 The Kubernetes Authors.
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 awsup
import (
"fmt"
"math"
"sync"
"github.com/aws/aws-sdk-go/aws"
"k8s.io/klog/v2"
)
type AWSMachineTypeInfo struct {
Name string
MemoryGB float32
Cores int
EphemeralDisks []int
GPU bool
MaxPods int
InstanceENIs int
InstanceIPsPerENI int
}
type EphemeralDevice struct {
DeviceName string
VirtualName string
SizeGB int
}
var (
machineTypeInfo map[string]*AWSMachineTypeInfo
machineTypeMutex sync.Mutex
)
func (m *AWSMachineTypeInfo) EphemeralDevices() []*EphemeralDevice {
var disks []*EphemeralDevice
for i, sizeGB := range m.EphemeralDisks {
d := &EphemeralDevice{
SizeGB: sizeGB,
}
if i >= 20 {
// TODO: What drive letters do we use?
klog.Fatalf("ephemeral devices for > 20 not yet implemented")
}
d.DeviceName = fmt.Sprintf("/dev/sd%c", 'c'+i)
d.VirtualName = fmt.Sprintf("ephemeral%d", i)
disks = append(disks, d)
}
return disks
}
func GetMachineTypeInfo(c AWSCloud, machineType string) (*AWSMachineTypeInfo, error) {
machineTypeMutex.Lock()
defer machineTypeMutex.Unlock()
if machineTypeInfo == nil {
machineTypeInfo = make(map[string]*AWSMachineTypeInfo)
} else if i, ok := machineTypeInfo[machineType]; ok {
return i, nil
}
info, err := c.DescribeInstanceType(machineType)
if err != nil {
return nil, err
}
machine := AWSMachineTypeInfo{
Name: machineType,
GPU: info.GpuInfo != nil,
InstanceENIs: intValue(info.NetworkInfo.MaximumNetworkInterfaces),
InstanceIPsPerENI: intValue(info.NetworkInfo.Ipv4AddressesPerInterface),
}
memoryGB := float64(intValue(info.MemoryInfo.SizeInMiB)) / 1024
machine.MemoryGB = float32(math.Round(memoryGB*100) / 100)
if info.VCpuInfo != nil && info.VCpuInfo.DefaultVCpus != nil {
machine.Cores = intValue(info.VCpuInfo.DefaultVCpus)
}
if info.InstanceStorageInfo != nil && len(info.InstanceStorageInfo.Disks) > 0 {
disks := make([]int, 0)
for _, disk := range info.InstanceStorageInfo.Disks {
for i := 0; i < intValue(disk.Count); i++ {
disks = append(disks, intValue(disk.SizeInGB))
}
}
machine.EphemeralDisks = disks
}
machineTypeInfo[machineType] = &machine
return &machine, nil
}
func intValue(v *int64) int {
return int(aws.Int64Value(v))
}