// getCgroupFilePath constructs file path to get targetted stats file.
func getCgroupFilePath(containerID, base, target, file string) string {
if len(base) == 0 {
base = common.HostSys(fmt.Sprintf("fs/cgroup/%s/docker", target))
}
statfile := path.Join(base, containerID, file)
if _, err := os.Stat(statfile); os.IsNotExist(err) {
statfile = path.Join(
common.HostSys(fmt.Sprintf("fs/cgroup/%s/system.slice", target)), "docker-"+containerID+".scope", file)
}
return statfile
}
func Info() (*InfoStat, error) {
ret := &InfoStat{
OS: runtime.GOOS,
}
hostname, err := os.Hostname()
if err == nil {
ret.Hostname = hostname
}
platform, family, version, err := PlatformInformation()
if err == nil {
ret.Platform = platform
ret.PlatformFamily = family
ret.PlatformVersion = version
}
kernelVersion, err := KernelVersion()
if err == nil {
ret.KernelVersion = kernelVersion
}
system, role, err := Virtualization()
if err == nil {
ret.VirtualizationSystem = system
ret.VirtualizationRole = role
}
boot, err := BootTime()
if err == nil {
ret.BootTime = boot
ret.Uptime = uptime(boot)
}
if numProcs, err := common.NumProcs(); err == nil {
ret.Procs = numProcs
}
sysProductUUID := common.HostSys("class/dmi/id/product_uuid")
switch {
case common.PathExists(sysProductUUID):
lines, err := common.ReadLines(sysProductUUID)
if err == nil && len(lines) > 0 && lines[0] != "" {
ret.HostID = lines[0]
break
}
fallthrough
default:
values, err := common.DoSysctrl("kernel.random.boot_id")
if err == nil && len(values) == 1 && values[0] != "" {
ret.HostID = values[0]
}
}
return ret, nil
}
// CgroupCPU returnes specified cgroup id CPU status.
// containerid is same as docker id if you use docker.
// If you use container via systemd.slice, you could use
// containerid = docker-<container id>.scope and base=/sys/fs/cgroup/cpuacct/system.slice/
func CgroupCPU(containerid string, base string) (*cpu.CPUTimesStat, error) {
if len(base) == 0 {
base = common.HostSys("fs/cgroup/cpuacct/docker")
}
statfile := path.Join(base, containerid, "cpuacct.stat")
if _, err := os.Stat(statfile); os.IsNotExist(err) {
statfile = path.Join(common.HostSys("fs/cgroup/cpuacct/system.slice"), "docker-"+containerid+".scope", "cpuacct.stat")
}
lines, err := common.ReadLines(statfile)
if err != nil {
return nil, err
}
// empty containerid means all cgroup
if len(containerid) == 0 {
containerid = "all"
}
ret := &cpu.CPUTimesStat{CPU: containerid}
for _, line := range lines {
fields := strings.Split(line, " ")
if fields[0] == "user" {
user, err := strconv.ParseFloat(fields[1], 64)
if err == nil {
ret.User = float64(user)
}
}
if fields[0] == "system" {
system, err := strconv.ParseFloat(fields[1], 64)
if err == nil {
ret.System = float64(system)
}
}
}
return ret, nil
}
func sysCPUPath(cpu int32, relPath string) string {
return common.HostSys(fmt.Sprintf("devices/system/cpu/cpu%d", cpu), relPath)
}
func CgroupMemDocker(containerid string) (*CgroupMemStat, error) {
return CgroupMem(containerid, common.HostSys("fs/cgroup/memory/docker"))
}
func CgroupCPUDocker(containerid string) (*cpu.CPUTimesStat, error) {
return CgroupCPU(containerid, common.HostSys("fs/cgroup/cpuacct/docker"))
}
func CgroupMem(containerid string, base string) (*CgroupMemStat, error) {
if len(base) == 0 {
base = common.HostSys("fs/cgroup/memory/docker")
}
statfile := path.Join(base, containerid, "memory.stat")
if _, err := os.Stat(statfile); os.IsNotExist(err) {
statfile = path.Join(common.HostSys("fs/cgroup/memory/system.slice"), "docker-"+containerid+".scope", "memory.stat")
}
// empty containerid means all cgroup
if len(containerid) == 0 {
containerid = "all"
}
lines, err := common.ReadLines(statfile)
if err != nil {
return nil, err
}
ret := &CgroupMemStat{ContainerID: containerid}
for _, line := range lines {
fields := strings.Split(line, " ")
v, err := strconv.ParseUint(fields[1], 10, 64)
if err != nil {
continue
}
switch fields[0] {
case "cache":
ret.Cache = v
case "rss":
ret.RSS = v
case "rss_huge":
ret.RSSHuge = v
case "mapped_file":
ret.MappedFile = v
case "pgpgin":
ret.Pgpgin = v
case "pgpgout":
ret.Pgpgout = v
case "pgfault":
ret.Pgfault = v
case "pgmajfault":
ret.Pgmajfault = v
case "inactive_anon":
ret.InactiveAnon = v
case "active_anon":
ret.ActiveAnon = v
case "inactive_file":
ret.InactiveFile = v
case "active_file":
ret.ActiveFile = v
case "unevictable":
ret.Unevictable = v
case "hierarchical_memory_limit":
ret.HierarchicalMemoryLimit = v
case "total_cache":
ret.TotalCache = v
case "total_rss":
ret.TotalRSS = v
case "total_rss_huge":
ret.TotalRSSHuge = v
case "total_mapped_file":
ret.TotalMappedFile = v
case "total_pgpgin":
ret.TotalPgpgIn = v
case "total_pgpgout":
ret.TotalPgpgOut = v
case "total_pgfault":
ret.TotalPgFault = v
case "total_pgmajfault":
ret.TotalPgMajFault = v
case "total_inactive_anon":
ret.TotalInactiveAnon = v
case "total_active_anon":
ret.TotalActiveAnon = v
case "total_inactive_file":
ret.TotalInactiveFile = v
case "total_active_file":
ret.TotalActiveFile = v
case "total_unevictable":
ret.TotalUnevictable = v
}
}
return ret, nil
}