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Merge pull request #603 from pierresouchay/host_id_fixed_on_linux

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Have a real fixed HostID on Linux
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shirou 2018-11-07 20:16:21 +09:00 committed by GitHub
commit 48177ef5f8
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1 changed files with 13 additions and 0 deletions
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13
host/host_linux.go
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@ -73,7 +73,10 @@ func InfoWithContext(ctx context.Context) (*InfoStat, error) {
}
sysProductUUID := common.HostSys("class/dmi/id/product_uuid")
machineID := common.HostEtc("machine-id")
switch {
// In order to read this file, needs to be supported by kernel/arch and run as root
// so having fallback is important
case common.PathExists(sysProductUUID):
lines, err := common.ReadLines(sysProductUUID)
if err == nil && len(lines) > 0 && lines[0] != "" {
@ -81,6 +84,16 @@ func InfoWithContext(ctx context.Context) (*InfoStat, error) {
break
}
fallthrough
// Fallback on GNU Linux systems with systemd, readable by everyone
case common.PathExists(machineID):
lines, err := common.ReadLines(machineID)
if err == nil && len(lines) > 0 && len(lines[0]) == 32 {
st := lines[0]
ret.HostID = fmt.Sprintf("%s-%s-%s-%s-%s", st[0:8], st[8:12], st[12:16], st[16:20], st[20:32])
break
}
fallthrough
// Not stable between reboot, but better than nothing
default:
values, err := common.DoSysctrl("kernel.random.boot_id")
if err == nil && len(values) == 1 && values[0] != "" {