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package libpod
import (
"bytes"
"fmt"
"io/ioutil"
"os"
"runtime"
"strconv"
"time"
"github.com/docker/docker/pkg/system"
"github.com/pkg/errors"
)
// InfoData holds the info type, i.e store, host etc and the data for each type
type InfoData struct {
Type string
Data map[string]interface{}
}
// 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()
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
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()
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
}
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