mirror of https://github.com/status-im/consul.git
515 lines
14 KiB
Go
515 lines
14 KiB
Go
// +build linux
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package host
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import (
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"bytes"
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"context"
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"encoding/binary"
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"fmt"
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"io/ioutil"
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"os"
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"os/exec"
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"path/filepath"
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"regexp"
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"strconv"
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"strings"
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"github.com/shirou/gopsutil/v3/internal/common"
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"golang.org/x/sys/unix"
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)
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type lsbStruct struct {
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ID string
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Release string
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Codename string
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Description string
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}
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// from utmp.h
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const (
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user_PROCESS = 7
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hostTemperatureScale = 1000.0
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)
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func HostIDWithContext(ctx context.Context) (string, error) {
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sysProductUUID := common.HostSys("class/dmi/id/product_uuid")
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machineID := common.HostEtc("machine-id")
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procSysKernelRandomBootID := common.HostProc("sys/kernel/random/boot_id")
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switch {
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// In order to read this file, needs to be supported by kernel/arch and run as root
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// so having fallback is important
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case common.PathExists(sysProductUUID):
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lines, err := common.ReadLines(sysProductUUID)
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if err == nil && len(lines) > 0 && lines[0] != "" {
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return strings.ToLower(lines[0]), nil
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}
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fallthrough
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// Fallback on GNU Linux systems with systemd, readable by everyone
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case common.PathExists(machineID):
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lines, err := common.ReadLines(machineID)
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if err == nil && len(lines) > 0 && len(lines[0]) == 32 {
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st := lines[0]
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return fmt.Sprintf("%s-%s-%s-%s-%s", st[0:8], st[8:12], st[12:16], st[16:20], st[20:32]), nil
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}
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fallthrough
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// Not stable between reboot, but better than nothing
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default:
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lines, err := common.ReadLines(procSysKernelRandomBootID)
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if err == nil && len(lines) > 0 && lines[0] != "" {
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return strings.ToLower(lines[0]), nil
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}
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}
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return "", nil
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}
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func numProcs(ctx context.Context) (uint64, error) {
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return common.NumProcs()
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}
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func BootTimeWithContext(ctx context.Context) (uint64, error) {
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return common.BootTimeWithContext(ctx)
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}
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func UptimeWithContext(ctx context.Context) (uint64, error) {
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sysinfo := &unix.Sysinfo_t{}
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if err := unix.Sysinfo(sysinfo); err != nil {
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return 0, err
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}
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return uint64(sysinfo.Uptime), nil
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}
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func UsersWithContext(ctx context.Context) ([]UserStat, error) {
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utmpfile := common.HostVar("run/utmp")
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file, err := os.Open(utmpfile)
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if err != nil {
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return nil, err
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}
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defer file.Close()
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buf, err := ioutil.ReadAll(file)
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if err != nil {
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return nil, err
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}
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count := len(buf) / sizeOfUtmp
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ret := make([]UserStat, 0, count)
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for i := 0; i < count; i++ {
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b := buf[i*sizeOfUtmp : (i+1)*sizeOfUtmp]
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var u utmp
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br := bytes.NewReader(b)
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err := binary.Read(br, binary.LittleEndian, &u)
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if err != nil {
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continue
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}
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if u.Type != user_PROCESS {
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continue
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}
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user := UserStat{
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User: common.IntToString(u.User[:]),
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Terminal: common.IntToString(u.Line[:]),
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Host: common.IntToString(u.Host[:]),
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Started: int(u.Tv.Sec),
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}
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ret = append(ret, user)
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}
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return ret, nil
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}
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func getlsbStruct() (*lsbStruct, error) {
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ret := &lsbStruct{}
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if common.PathExists(common.HostEtc("lsb-release")) {
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contents, err := common.ReadLines(common.HostEtc("lsb-release"))
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if err != nil {
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return ret, err // return empty
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}
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for _, line := range contents {
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field := strings.Split(line, "=")
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if len(field) < 2 {
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continue
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}
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switch field[0] {
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case "DISTRIB_ID":
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ret.ID = field[1]
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case "DISTRIB_RELEASE":
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ret.Release = field[1]
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case "DISTRIB_CODENAME":
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ret.Codename = field[1]
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case "DISTRIB_DESCRIPTION":
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ret.Description = field[1]
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}
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}
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} else if common.PathExists("/usr/bin/lsb_release") {
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lsb_release, err := exec.LookPath("lsb_release")
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if err != nil {
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return ret, err
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}
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out, err := invoke.Command(lsb_release)
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if err != nil {
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return ret, err
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}
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for _, line := range strings.Split(string(out), "\n") {
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field := strings.Split(line, ":")
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if len(field) < 2 {
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continue
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}
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switch field[0] {
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case "Distributor ID":
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ret.ID = field[1]
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case "Release":
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ret.Release = field[1]
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case "Codename":
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ret.Codename = field[1]
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case "Description":
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ret.Description = field[1]
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}
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}
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}
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return ret, nil
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}
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func PlatformInformationWithContext(ctx context.Context) (platform string, family string, version string, err error) {
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lsb, err := getlsbStruct()
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if err != nil {
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lsb = &lsbStruct{}
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}
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if common.PathExists(common.HostEtc("oracle-release")) {
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platform = "oracle"
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contents, err := common.ReadLines(common.HostEtc("oracle-release"))
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if err == nil {
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version = getRedhatishVersion(contents)
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}
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} else if common.PathExists(common.HostEtc("enterprise-release")) {
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platform = "oracle"
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contents, err := common.ReadLines(common.HostEtc("enterprise-release"))
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if err == nil {
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version = getRedhatishVersion(contents)
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}
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} else if common.PathExists(common.HostEtc("slackware-version")) {
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platform = "slackware"
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contents, err := common.ReadLines(common.HostEtc("slackware-version"))
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if err == nil {
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version = getSlackwareVersion(contents)
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}
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} else if common.PathExists(common.HostEtc("debian_version")) {
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if lsb.ID == "Ubuntu" {
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platform = "ubuntu"
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version = lsb.Release
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} else if lsb.ID == "LinuxMint" {
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platform = "linuxmint"
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version = lsb.Release
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} else {
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if common.PathExists("/usr/bin/raspi-config") {
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platform = "raspbian"
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} else {
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platform = "debian"
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}
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contents, err := common.ReadLines(common.HostEtc("debian_version"))
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if err == nil && len(contents) > 0 && contents[0] != "" {
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version = contents[0]
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}
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}
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} else if common.PathExists(common.HostEtc("redhat-release")) {
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contents, err := common.ReadLines(common.HostEtc("redhat-release"))
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if err == nil {
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version = getRedhatishVersion(contents)
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platform = getRedhatishPlatform(contents)
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}
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} else if common.PathExists(common.HostEtc("system-release")) {
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contents, err := common.ReadLines(common.HostEtc("system-release"))
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if err == nil {
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version = getRedhatishVersion(contents)
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platform = getRedhatishPlatform(contents)
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}
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} else if common.PathExists(common.HostEtc("gentoo-release")) {
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platform = "gentoo"
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contents, err := common.ReadLines(common.HostEtc("gentoo-release"))
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if err == nil {
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version = getRedhatishVersion(contents)
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}
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} else if common.PathExists(common.HostEtc("SuSE-release")) {
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contents, err := common.ReadLines(common.HostEtc("SuSE-release"))
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if err == nil {
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version = getSuseVersion(contents)
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platform = getSusePlatform(contents)
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}
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// TODO: slackware detecion
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} else if common.PathExists(common.HostEtc("arch-release")) {
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platform = "arch"
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version = lsb.Release
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} else if common.PathExists(common.HostEtc("alpine-release")) {
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platform = "alpine"
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contents, err := common.ReadLines(common.HostEtc("alpine-release"))
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if err == nil && len(contents) > 0 && contents[0] != "" {
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version = contents[0]
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}
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} else if common.PathExists(common.HostEtc("os-release")) {
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p, v, err := common.GetOSRelease()
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if err == nil {
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platform = p
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version = v
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}
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} else if lsb.ID == "RedHat" {
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platform = "redhat"
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version = lsb.Release
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} else if lsb.ID == "Amazon" {
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platform = "amazon"
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version = lsb.Release
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} else if lsb.ID == "ScientificSL" {
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platform = "scientific"
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version = lsb.Release
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} else if lsb.ID == "XenServer" {
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platform = "xenserver"
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version = lsb.Release
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} else if lsb.ID != "" {
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platform = strings.ToLower(lsb.ID)
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version = lsb.Release
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}
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switch platform {
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case "debian", "ubuntu", "linuxmint", "raspbian":
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family = "debian"
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case "fedora":
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family = "fedora"
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case "oracle", "centos", "redhat", "scientific", "enterpriseenterprise", "amazon", "xenserver", "cloudlinux", "ibm_powerkvm":
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family = "rhel"
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case "suse", "opensuse", "sles":
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family = "suse"
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case "gentoo":
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family = "gentoo"
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case "slackware":
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family = "slackware"
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case "arch":
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family = "arch"
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case "exherbo":
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family = "exherbo"
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case "alpine":
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family = "alpine"
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case "coreos":
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family = "coreos"
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case "solus":
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family = "solus"
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}
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return platform, family, version, nil
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}
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func KernelVersionWithContext(ctx context.Context) (version string, err error) {
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var utsname unix.Utsname
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err = unix.Uname(&utsname)
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if err != nil {
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return "", err
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}
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return string(utsname.Release[:bytes.IndexByte(utsname.Release[:], 0)]), nil
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}
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func getSlackwareVersion(contents []string) string {
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c := strings.ToLower(strings.Join(contents, ""))
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c = strings.Replace(c, "slackware ", "", 1)
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return c
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}
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func getRedhatishVersion(contents []string) string {
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c := strings.ToLower(strings.Join(contents, ""))
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if strings.Contains(c, "rawhide") {
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return "rawhide"
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}
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if matches := regexp.MustCompile(`release (\d[\d.]*)`).FindStringSubmatch(c); matches != nil {
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return matches[1]
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}
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return ""
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}
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func getRedhatishPlatform(contents []string) string {
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c := strings.ToLower(strings.Join(contents, ""))
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if strings.Contains(c, "red hat") {
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return "redhat"
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}
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f := strings.Split(c, " ")
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return f[0]
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}
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func getSuseVersion(contents []string) string {
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version := ""
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for _, line := range contents {
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if matches := regexp.MustCompile(`VERSION = ([\d.]+)`).FindStringSubmatch(line); matches != nil {
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version = matches[1]
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} else if matches := regexp.MustCompile(`PATCHLEVEL = ([\d]+)`).FindStringSubmatch(line); matches != nil {
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version = version + "." + matches[1]
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}
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}
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return version
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}
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func getSusePlatform(contents []string) string {
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c := strings.ToLower(strings.Join(contents, ""))
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if strings.Contains(c, "opensuse") {
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return "opensuse"
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}
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return "suse"
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}
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func VirtualizationWithContext(ctx context.Context) (string, string, error) {
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return common.VirtualizationWithContext(ctx)
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}
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func SensorsTemperaturesWithContext(ctx context.Context) ([]TemperatureStat, error) {
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var err error
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var files []string
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temperatures := make([]TemperatureStat, 0)
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// Only the temp*_input file provides current temperature
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// value in millidegree Celsius as reported by the temperature to the device:
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// https://www.kernel.org/doc/Documentation/hwmon/sysfs-interface
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if files, err = filepath.Glob(common.HostSys("/class/hwmon/hwmon*/temp*_input")); err != nil {
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return temperatures, err
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}
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if len(files) == 0 {
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// CentOS has an intermediate /device directory:
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// https://github.com/giampaolo/psutil/issues/971
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if files, err = filepath.Glob(common.HostSys("/class/hwmon/hwmon*/device/temp*_input")); err != nil {
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return temperatures, err
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}
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}
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var warns Warnings
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if len(files) == 0 { // handle distributions without hwmon, like raspbian #391, parse legacy thermal_zone files
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files, err = filepath.Glob(common.HostSys("/class/thermal/thermal_zone*/"))
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if err != nil {
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return temperatures, err
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}
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for _, file := range files {
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// Get the name of the temperature you are reading
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name, err := ioutil.ReadFile(filepath.Join(file, "type"))
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if err != nil {
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warns.Add(err)
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continue
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}
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// Get the temperature reading
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current, err := ioutil.ReadFile(filepath.Join(file, "temp"))
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if err != nil {
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warns.Add(err)
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continue
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}
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temperature, err := strconv.ParseInt(strings.TrimSpace(string(current)), 10, 64)
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if err != nil {
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warns.Add(err)
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continue
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}
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temperatures = append(temperatures, TemperatureStat{
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SensorKey: strings.TrimSpace(string(name)),
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Temperature: float64(temperature) / 1000.0,
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})
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}
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return temperatures, warns.Reference()
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}
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temperatures = make([]TemperatureStat, 0, len(files))
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// example directory
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// device/ temp1_crit_alarm temp2_crit_alarm temp3_crit_alarm temp4_crit_alarm temp5_crit_alarm temp6_crit_alarm temp7_crit_alarm
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// name temp1_input temp2_input temp3_input temp4_input temp5_input temp6_input temp7_input
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// power/ temp1_label temp2_label temp3_label temp4_label temp5_label temp6_label temp7_label
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// subsystem/ temp1_max temp2_max temp3_max temp4_max temp5_max temp6_max temp7_max
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// temp1_crit temp2_crit temp3_crit temp4_crit temp5_crit temp6_crit temp7_crit uevent
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for _, file := range files {
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var raw []byte
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var temperature float64
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// Get the base directory location
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directory := filepath.Dir(file)
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// Get the base filename prefix like temp1
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basename := strings.Split(filepath.Base(file), "_")[0]
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// Get the base path like <dir>/temp1
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basepath := filepath.Join(directory, basename)
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// Get the label of the temperature you are reading
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label := ""
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if raw, _ = ioutil.ReadFile(basepath + "_label"); len(raw) != 0 {
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// Format the label from "Core 0" to "core_0"
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label = strings.Join(strings.Split(strings.TrimSpace(strings.ToLower(string(raw))), " "), "_")
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}
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// Get the name of the temperature you are reading
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if raw, err = ioutil.ReadFile(filepath.Join(directory, "name")); err != nil {
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warns.Add(err)
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continue
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}
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name := strings.TrimSpace(string(raw))
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if label != "" {
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name = name + "_" + label
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}
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// Get the temperature reading
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if raw, err = ioutil.ReadFile(file); err != nil {
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warns.Add(err)
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continue
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}
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if temperature, err = strconv.ParseFloat(strings.TrimSpace(string(raw)), 64); err != nil {
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warns.Add(err)
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continue
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}
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// Add discovered temperature sensor to the list
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temperatures = append(temperatures, TemperatureStat{
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SensorKey: name,
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Temperature: temperature / hostTemperatureScale,
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High: optionalValueReadFromFile(basepath+"_max") / hostTemperatureScale,
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Critical: optionalValueReadFromFile(basepath+"_crit") / hostTemperatureScale,
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})
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}
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return temperatures, warns.Reference()
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}
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func optionalValueReadFromFile(filename string) float64 {
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var raw []byte
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var err error
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var value float64
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// Check if file exists
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if _, err := os.Stat(filename); os.IsNotExist(err) {
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return 0
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}
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if raw, err = ioutil.ReadFile(filename); err != nil {
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return 0
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}
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if value, err = strconv.ParseFloat(strings.TrimSpace(string(raw)), 64); err != nil {
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return 0
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}
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return value
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}
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