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package libpod
import (
"bufio"
"bytes"
"fmt"
"io/ioutil"
"os"
"runtime"
"strconv"
"strings"
"time"
"github.com/containers/buildah"
"github.com/containers/libpod/pkg/rootless"
"github.com/containers/libpod/utils"
"github.com/containers/storage"
"github.com/containers/storage/pkg/system"
"github.com/pkg/errors"
)
// top-level "host" info
func (r *Runtime) hostInfo() (map[string]interface{}, error) {
// lets say OS, arch, number of cpus, amount of memory, maybe os distribution/version, hostname, kernel version, uptime
info := map[string]interface{}{}
info["os"] = runtime.GOOS
info["arch"] = runtime.GOARCH
info["cpus"] = runtime.NumCPU()
info["rootless"] = rootless.IsRootless()
mi, err := system.ReadMemInfo()
if err != nil {
return nil, errors.Wrapf(err, "error reading memory info")
}
// TODO this might be a place for github.com/dustin/go-humanize
info["MemTotal"] = mi.MemTotal
info["MemFree"] = mi.MemFree
info["SwapTotal"] = mi.SwapTotal
info["SwapFree"] = mi.SwapFree
conmonVersion, _ := r.GetConmonVersion()
ociruntimeVersion, _ := r.GetOCIRuntimeVersion()
hostDistributionInfo := r.GetHostDistributionInfo()
info["Conmon"] = map[string]interface{}{
"path": r.conmonPath,
"package": r.defaultOCIRuntime.conmonPackage(),
"version": conmonVersion,
}
info["OCIRuntime"] = map[string]interface{}{
"path": r.defaultOCIRuntime.path,
"package": r.defaultOCIRuntime.pathPackage(),
"version": ociruntimeVersion,
}
info["Distribution"] = map[string]interface{}{
"distribution": hostDistributionInfo["Distribution"],
"version": hostDistributionInfo["Version"],
}
info["BuildahVersion"] = buildah.Version
kv, err := readKernelVersion()
if err != nil {
return nil, errors.Wrapf(err, "error reading kernel version")
}
info["kernel"] = kv
up, err := readUptime()
if err != nil {
return nil, errors.Wrapf(err, "error reading up time")
}
// Convert uptime in seconds to a human-readable format
upSeconds := up + "s"
upDuration, err := time.ParseDuration(upSeconds)
if err != nil {
return nil, errors.Wrapf(err, "error parsing system uptime")
}
hoursFound := false
var timeBuffer bytes.Buffer
var hoursBuffer bytes.Buffer
for _, elem := range upDuration.String() {
timeBuffer.WriteRune(elem)
if elem == 'h' || elem == 'm' {
timeBuffer.WriteRune(' ')
if elem == 'h' {
hoursFound = true
}
}
if !hoursFound {
hoursBuffer.WriteRune(elem)
}
}
info["uptime"] = timeBuffer.String()
if hoursFound {
hours, err := strconv.ParseFloat(hoursBuffer.String(), 64)
if err == nil {
days := hours / 24
info["uptime"] = fmt.Sprintf("%s (Approximately %.2f days)", info["uptime"], days)
}
}
host, err := os.Hostname()
if err != nil {
return nil, errors.Wrapf(err, "error getting hostname")
}
info["hostname"] = host
return info, nil
}
// top-level "store" info
func (r *Runtime) storeInfo() (map[string]interface{}, error) {
// lets say storage driver in use, number of images, number of containers
info := map[string]interface{}{}
info["GraphRoot"] = r.store.GraphRoot()
info["RunRoot"] = r.store.RunRoot()
info["GraphDriverName"] = r.store.GraphDriverName()
info["GraphOptions"] = r.store.GraphOptions()
info["VolumePath"] = r.config.VolumePath
configFile, err := storage.DefaultConfigFile(rootless.IsRootless())
if err != nil {
return nil, err
}
info["ConfigFile"] = configFile
statusPairs, err := r.store.Status()
if err != nil {
return nil, err
}
status := map[string]string{}
for _, pair := range statusPairs {
status[pair[0]] = pair[1]
}
info["GraphStatus"] = status
images, err := r.store.Images()
if err != nil {
return nil, errors.Wrapf(err, "error getting number of images")
}
info["ImageStore"] = map[string]interface{}{
"number": len(images),
}
containers, err := r.store.Containers()
if err != nil {
return nil, errors.Wrapf(err, "error getting number of containers")
}
info["ContainerStore"] = map[string]interface{}{
"number": len(containers),
}
return info, nil
}
func readKernelVersion() (string, error) {
buf, err := ioutil.ReadFile("/proc/version")
if err != nil {
return "", err
}
f := bytes.Fields(buf)
if len(f) < 2 {
return string(bytes.TrimSpace(buf)), nil
}
return string(f[2]), nil
}
func readUptime() (string, error) {
buf, err := ioutil.ReadFile("/proc/uptime")
if err != nil {
return "", err
}
f := bytes.Fields(buf)
if len(f) < 1 {
return "", fmt.Errorf("invalid uptime")
}
return string(f[0]), nil
}
// GetConmonVersion returns a string representation of the conmon version
func (r *Runtime) GetConmonVersion() (string, error) {
output, err := utils.ExecCmd(r.conmonPath, "--version")
if err != nil {
return "", err
}
return strings.TrimSuffix(strings.Replace(output, "\n", ", ", 1), "\n"), nil
}
// GetOCIRuntimePath returns the path to the OCI Runtime Path the runtime is using
func (r *Runtime) GetOCIRuntimePath() string {
return r.defaultOCIRuntime.path
}
// GetOCIRuntimeVersion returns a string representation of the oci runtimes version
func (r *Runtime) GetOCIRuntimeVersion() (string, error) {
output, err := utils.ExecCmd(r.GetOCIRuntimePath(), "--version")
if err != nil {
return "", err
}
return strings.TrimSuffix(output, "\n"), nil
}
// GetHostDistributionInfo returns a map containing the host's distribution and version
func (r *Runtime) GetHostDistributionInfo() map[string]string {
dist := make(map[string]string)
// Populate values in case we cannot find the values
// or the file
dist["Distribution"] = "unknown"
dist["Version"] = "unknown"
f, err := os.Open("/etc/os-release")
if err != nil {
return dist
}
defer f.Close()
l := bufio.NewScanner(f)
for l.Scan() {
if strings.HasPrefix(l.Text(), "ID=") {
dist["Distribution"] = strings.TrimPrefix(l.Text(), "ID=")
}
if strings.HasPrefix(l.Text(), "VERSION_ID=") {
dist["Version"] = strings.Trim(strings.TrimPrefix(l.Text(), "VERSION_ID="), "\"")
}
}
return dist
}
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