func finishCPUInfo(c *CPUInfoStat) error {
if c.Mhz == 0 {
lines, err := common.ReadLines(sysCpuPath(c.CPU, "cpufreq/cpuinfo_max_freq"))
if err == nil {
value, err := strconv.ParseFloat(lines[0], 64)
if err != nil {
return err
}
c.Mhz = value
}
}
if len(c.CoreID) == 0 {
lines, err := common.ReadLines(sysCpuPath(c.CPU, "topology/core_id"))
if err == nil {
c.CoreID = lines[0]
}
}
return nil
}
// NetProtoCounters returns network statistics for the entire system
// If protocols is empty then all protocols are returned, otherwise
// just the protocols in the list are returned.
// Available protocols:
// ip,icmp,icmpmsg,tcp,udp,udplite
func NetProtoCounters(protocols []string) ([]NetProtoCountersStat, error) {
if len(protocols) == 0 {
protocols = netProtocols
}
stats := make([]NetProtoCountersStat, 0, len(protocols))
protos := make(map[string]bool, len(protocols))
for _, p := range protocols {
protos[p] = true
}
filename := "/proc/net/snmp"
lines, err := common.ReadLines(filename)
if err != nil {
return nil, err
}
linecount := len(lines)
for i := 0; i < linecount; i++ {
line := lines[i]
r := strings.IndexRune(line, ':')
if r == -1 {
return nil, errors.New(filename + " is not fomatted correctly, expected ':'.")
}
proto := strings.ToLower(line[:r])
if !protos[proto] {
// skip protocol and data line
i++
continue
}
// Read header line
statNames := strings.Split(line[r+2:], " ")
// Read data line
i++
statValues := strings.Split(lines[i][r+2:], " ")
if len(statNames) != len(statValues) {
return nil, errors.New(filename + " is not fomatted correctly, expected same number of columns.")
}
stat := NetProtoCountersStat{
Protocol: proto,
Stats: make(map[string]int64, len(statNames)),
}
for j := range statNames {
value, err := strconv.ParseInt(statValues[j], 10, 64)
if err != nil {
return nil, err
}
stat.Stats[statNames[j]] = value
}
stats = append(stats, stat)
}
return stats, nil
}
func getLSB() (*LSB, error) {
ret := &LSB{}
if common.PathExists("/etc/lsb-release") {
contents, err := common.ReadLines("/etc/lsb-release")
if err != nil {
return ret, err // return empty
}
for _, line := range contents {
field := strings.Split(line, "=")
if len(field) < 2 {
continue
}
switch field[0] {
case "DISTRIB_ID":
ret.ID = field[1]
case "DISTRIB_RELEASE":
ret.Release = field[1]
case "DISTRIB_CODENAME":
ret.Codename = field[1]
case "DISTRIB_DESCRIPTION":
ret.Description = field[1]
}
}
} else if common.PathExists("/usr/bin/lsb_release") {
out, err := exec.Command("/usr/bin/lsb_release").Output()
if err != nil {
return ret, err
}
for _, line := range strings.Split(string(out), "\n") {
field := strings.Split(line, ":")
if len(field) < 2 {
continue
}
switch field[0] {
case "Distributor ID":
ret.ID = field[1]
case "Release":
ret.Release = field[1]
case "Codename":
ret.Codename = field[1]
case "Description":
ret.Description = field[1]
}
}
}
return ret, nil
}
func VirtualMemory() (*VirtualMemoryStat, error) {
filename := common.HostProc("meminfo")
lines, _ := common.ReadLines(filename)
// flag if MemAvailable is in /proc/meminfo (kernel 3.14+)
memavail := false
ret := &VirtualMemoryStat{}
for _, line := range lines {
fields := strings.Split(line, ":")
if len(fields) != 2 {
continue
}
key := strings.TrimSpace(fields[0])
value := strings.TrimSpace(fields[1])
value = strings.Replace(value, " kB", "", -1)
t, err := strconv.ParseUint(value, 10, 64)
if err != nil {
return ret, err
}
switch key {
case "MemTotal":
ret.Total = t * 1024
case "MemFree":
ret.Free = t * 1024
case "MemAvailable":
memavail = true
ret.Available = t * 1024
case "Buffers":
ret.Buffers = t * 1024
case "Cached":
ret.Cached = t * 1024
case "Active":
ret.Active = t * 1024
case "Inactive":
ret.Inactive = t * 1024
}
}
if !memavail {
ret.Available = ret.Free + ret.Buffers + ret.Cached
}
ret.Used = ret.Total - ret.Free
ret.UsedPercent = float64(ret.Total-ret.Available) / float64(ret.Total) * 100.0
return ret, nil
}
func SwapMemory() (*SwapMemoryStat, error) {
sysinfo := &syscall.Sysinfo_t{}
if err := syscall.Sysinfo(sysinfo); err != nil {
return nil, err
}
ret := &SwapMemoryStat{
Total: uint64(sysinfo.Totalswap),
Free: uint64(sysinfo.Freeswap),
}
ret.Used = ret.Total - ret.Free
//check Infinity
if ret.Total != 0 {
ret.UsedPercent = float64(ret.Total-ret.Free) / float64(ret.Total) * 100.0
} else {
ret.UsedPercent = 0
}
filename := common.HostProc("vmstat")
lines, _ := common.ReadLines(filename)
for _, l := range lines {
fields := strings.Fields(l)
if len(fields) < 2 {
continue
}
switch fields[0] {
case "pswpin":
value, err := strconv.ParseUint(fields[1], 10, 64)
if err != nil {
continue
}
ret.Sin = value * 4 * 1024
case "pswpout":
value, err := strconv.ParseUint(fields[1], 10, 64)
if err != nil {
continue
}
ret.Sout = value * 4 * 1024
}
}
return ret, nil
}
// BootTime returns the system boot time expressed in seconds since the epoch.
func BootTime() (uint64, error) {
filename := common.HostProc("stat")
lines, err := common.ReadLines(filename)
if err != nil {
return 0, err
}
for _, line := range lines {
if strings.HasPrefix(line, "btime") {
f := strings.Fields(line)
if len(f) != 2 {
return 0, fmt.Errorf("wrong btime format")
}
b, err := strconv.ParseInt(f[1], 10, 64)
if err != nil {
return 0, err
}
return uint64(b), nil
}
}
return 0, fmt.Errorf("could not find btime")
}
func GetVirtualization() (string, string, error) {
var system string
var role string
filename := common.HostProc("xen")
if common.PathExists(filename) {
system = "xen"
role = "guest" // assume guest
if common.PathExists(filename + "/capabilities") {
contents, err := common.ReadLines(filename + "/capabilities")
if err == nil {
if common.StringsHas(contents, "control_d") {
role = "host"
}
}
}
}
filename = common.HostProc("modules")
if common.PathExists(filename) {
contents, err := common.ReadLines(filename)
if err == nil {
if common.StringsContains(contents, "kvm") {
system = "kvm"
role = "host"
} else if common.StringsContains(contents, "vboxdrv") {
system = "vbox"
role = "host"
} else if common.StringsContains(contents, "vboxguest") {
system = "vbox"
role = "guest"
}
}
}
filename = common.HostProc("cpuinfo")
if common.PathExists(filename) {
contents, err := common.ReadLines(filename)
if err == nil {
if common.StringsHas(contents, "QEMU Virtual CPU") ||
common.StringsHas(contents, "Common KVM processor") ||
common.StringsHas(contents, "Common 32-bit KVM processor") {
system = "kvm"
role = "guest"
}
}
}
filename = common.HostProc()
if common.PathExists(filename + "/bc/0") {
system = "openvz"
role = "host"
} else if common.PathExists(filename + "/vz") {
system = "openvz"
role = "guest"
}
// not use dmidecode because it requires root
if common.PathExists(filename + "/self/status") {
contents, err := common.ReadLines(filename + "/self/status")
if err == nil {
if common.StringsHas(contents, "s_context:") ||
common.StringsHas(contents, "VxID:") {
system = "linux-vserver"
}
// TODO: guest or host
}
}
if common.PathExists(filename + "/self/cgroup") {
contents, err := common.ReadLines(filename + "/self/cgroup")
if err == nil {
if common.StringsHas(contents, "lxc") ||
common.StringsHas(contents, "docker") {
system = "lxc"
role = "guest"
} else if common.PathExists("/usr/bin/lxc-version") { // TODO: which
system = "lxc"
role = "host"
}
}
}
return system, role, nil
}
func GetPlatformInformation() (platform string, family string, version string, err error) {
lsb, err := getLSB()
if err != nil {
lsb = &LSB{}
}
if common.PathExists("/etc/oracle-release") {
platform = "oracle"
contents, err := common.ReadLines("/etc/oracle-release")
if err == nil {
version = getRedhatishVersion(contents)
}
} else if common.PathExists("/etc/enterprise-release") {
platform = "oracle"
contents, err := common.ReadLines("/etc/enterprise-release")
if err == nil {
version = getRedhatishVersion(contents)
}
} else if common.PathExists("/etc/debian_version") {
if lsb.ID == "Ubuntu" {
platform = "ubuntu"
version = lsb.Release
} else if lsb.ID == "LinuxMint" {
platform = "linuxmint"
version = lsb.Release
} else {
if common.PathExists("/usr/bin/raspi-config") {
platform = "raspbian"
} else {
platform = "debian"
}
contents, err := common.ReadLines("/etc/debian_version")
if err == nil {
version = contents[0]
}
}
} else if common.PathExists("/etc/redhat-release") {
contents, err := common.ReadLines("/etc/redhat-release")
if err == nil {
version = getRedhatishVersion(contents)
platform = getRedhatishPlatform(contents)
}
} else if common.PathExists("/etc/system-release") {
contents, err := common.ReadLines("/etc/system-release")
if err == nil {
version = getRedhatishVersion(contents)
platform = getRedhatishPlatform(contents)
}
} else if common.PathExists("/etc/gentoo-release") {
platform = "gentoo"
contents, err := common.ReadLines("/etc/gentoo-release")
if err == nil {
version = getRedhatishVersion(contents)
}
} else if common.PathExists("/etc/SuSE-release") {
contents, err := common.ReadLines("/etc/SuSE-release")
if err == nil {
version = getSuseVersion(contents)
platform = getSusePlatform(contents)
}
// TODO: slackware detecion
} else if common.PathExists("/etc/arch-release") {
platform = "arch"
// TODO: exherbo detection
} else if lsb.ID == "RedHat" {
platform = "redhat"
version = lsb.Release
} else if lsb.ID == "Amazon" {
platform = "amazon"
version = lsb.Release
} else if lsb.ID == "ScientificSL" {
platform = "scientific"
version = lsb.Release
} else if lsb.ID == "XenServer" {
platform = "xenserver"
version = lsb.Release
} else if lsb.ID != "" {
platform = strings.ToLower(lsb.ID)
version = lsb.Release
}
switch platform {
case "debian", "ubuntu", "linuxmint", "raspbian":
family = "debian"
case "fedora":
family = "fedora"
case "oracle", "centos", "redhat", "scientific", "enterpriseenterprise", "amazon", "xenserver", "cloudlinux", "ibm_powerkvm":
family = "rhel"
case "suse", "opensuse":
family = "suse"
case "gentoo":
family = "gentoo"
case "slackware":
family = "slackware"
case "arch":
family = "arch"
case "exherbo":
family = "exherbo"
}
return platform, family, version, nil
}
// NetIOCounters returnes network I/O statistics for every network
// interface installed on the system. If pernic argument is false,
// return only sum of all information (which name is 'all'). If true,
// every network interface installed on the system is returned
// separately.
func NetIOCounters(pernic bool) ([]NetIOCountersStat, error) {
filename := common.HostProc("net/dev")
lines, err := common.ReadLines(filename)
if err != nil {
return nil, err
}
statlen := len(lines) - 1
ret := make([]NetIOCountersStat, 0, statlen)
for _, line := range lines[2:] {
parts := strings.SplitN(line, ":", 2)
if len(parts) != 2 {
continue
}
interfaceName := strings.TrimSpace(parts[0])
if interfaceName == "" {
continue
}
fields := strings.Fields(strings.TrimSpace(parts[1]))
bytesRecv, err := strconv.ParseUint(fields[0], 10, 64)
if err != nil {
return ret, err
}
packetsRecv, err := strconv.ParseUint(fields[1], 10, 64)
if err != nil {
return ret, err
}
errIn, err := strconv.ParseUint(fields[2], 10, 64)
if err != nil {
return ret, err
}
dropIn, err := strconv.ParseUint(fields[3], 10, 64)
if err != nil {
return ret, err
}
bytesSent, err := strconv.ParseUint(fields[8], 10, 64)
if err != nil {
return ret, err
}
packetsSent, err := strconv.ParseUint(fields[9], 10, 64)
if err != nil {
return ret, err
}
errOut, err := strconv.ParseUint(fields[10], 10, 64)
if err != nil {
return ret, err
}
dropOut, err := strconv.ParseUint(fields[13], 10, 64)
if err != nil {
return ret, err
}
nic := NetIOCountersStat{
Name: interfaceName,
BytesRecv: bytesRecv,
PacketsRecv: packetsRecv,
Errin: errIn,
Dropin: dropIn,
BytesSent: bytesSent,
PacketsSent: packetsSent,
Errout: errOut,
Dropout: dropOut,
}
ret = append(ret, nic)
}
if pernic == false {
return getNetIOCountersAll(ret)
}
return ret, nil
}
// CPUInfo on linux will return 1 item per physical thread.
//
// CPUs have three levels of counting: sockets, cores, threads.
// Cores with HyperThreading count as having 2 threads per core.
// Sockets often come with many physical CPU cores.
// For example a single socket board with two cores each with HT will
// return 4 CPUInfoStat structs on Linux and the "Cores" field set to 1.
func CPUInfo() ([]CPUInfoStat, error) {
filename := common.HostProc("cpuinfo")
lines, _ := common.ReadLines(filename)
var ret []CPUInfoStat
c := CPUInfoStat{CPU: -1, Cores: 1}
for _, line := range lines {
fields := strings.Split(line, ":")
if len(fields) < 2 {
continue
}
key := strings.TrimSpace(fields[0])
value := strings.TrimSpace(fields[1])
switch key {
case "processor":
if c.CPU >= 0 {
err := finishCPUInfo(&c)
if err != nil {
return ret, err
}
ret = append(ret, c)
}
c = CPUInfoStat{Cores: 1}
t, err := strconv.ParseInt(value, 10, 64)
if err != nil {
return ret, err
}
c.CPU = int32(t)
case "vendor_id":
c.VendorID = value
case "cpu family":
c.Family = value
case "model":
c.Model = value
case "model name":
c.ModelName = value
case "stepping":
t, err := strconv.ParseInt(value, 10, 64)
if err != nil {
return ret, err
}
c.Stepping = int32(t)
case "cpu MHz":
t, err := strconv.ParseFloat(value, 64)
if err != nil {
return ret, err
}
c.Mhz = t
case "cache size":
t, err := strconv.ParseInt(strings.Replace(value, " KB", "", 1), 10, 64)
if err != nil {
return ret, err
}
c.CacheSize = int32(t)
case "physical id":
c.PhysicalID = value
case "core id":
c.CoreID = value
case "flags", "Features":
c.Flags = strings.FieldsFunc(value, func(r rune) bool {
return r == ',' || r == ' '
})
}
}
if c.CPU >= 0 {
err := finishCPUInfo(&c)
if err != nil {
return ret, err
}
ret = append(ret, c)
}
return ret, nil
}