54 lines
1.6 KiB
Go
54 lines
1.6 KiB
Go
// +build linux
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/*
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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 vsphere
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import (
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"fmt"
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"io/ioutil"
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"strings"
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)
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const (
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UUIDPath = "/sys/class/dmi/id/product_serial"
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UUIDPrefix = "VMware-"
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)
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func GetVMUUID() (string, error) {
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id, err := ioutil.ReadFile(UUIDPath)
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if err != nil {
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return "", fmt.Errorf("error retrieving vm uuid: %s", err)
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}
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uuidFromFile := string(id[:])
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//strip leading and trailing white space and new line char
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uuid := strings.TrimSpace(uuidFromFile)
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// check the uuid starts with "VMware-"
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if !strings.HasPrefix(uuid, UUIDPrefix) {
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return "", fmt.Errorf("Failed to match Prefix, UUID read from the file is %v", uuidFromFile)
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}
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// Strip the prefix and white spaces and -
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uuid = strings.Replace(uuid[len(UUIDPrefix):(len(uuid))], " ", "", -1)
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uuid = strings.Replace(uuid, "-", "", -1)
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if len(uuid) != 32 {
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return "", fmt.Errorf("Length check failed, UUID read from the file is %v", uuidFromFile)
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}
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// need to add dashes, e.g. "564d395e-d807-e18a-cb25-b79f65eb2b9f"
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uuid = fmt.Sprintf("%s-%s-%s-%s-%s", uuid[0:8], uuid[8:12], uuid[12:16], uuid[16:20], uuid[20:32])
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return uuid, nil
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}
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