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|
package buildah
import (
"bufio"
"bytes"
"fmt"
"io/ioutil"
"os"
"runtime"
"strconv"
"strings"
"time"
"github.com/containers/buildah/pkg/cgroups"
"github.com/containers/buildah/pkg/unshare"
"github.com/containers/storage"
"github.com/containers/storage/pkg/system"
"github.com/sirupsen/logrus"
)
// 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{}
}
// Info returns the store and host information
func Info(store storage.Store) ([]InfoData, error) {
info := []InfoData{}
// get host information
hostInfo := hostInfo()
info = append(info, InfoData{Type: "host", Data: hostInfo})
// get store information
storeInfo, err := storeInfo(store)
if err != nil {
logrus.Error(err, "error getting store info")
}
info = append(info, InfoData{Type: "store", Data: storeInfo})
return info, nil
}
func hostInfo() map[string]interface{} {
info := map[string]interface{}{}
info["os"] = runtime.GOOS
info["arch"] = runtime.GOARCH
info["cpus"] = runtime.NumCPU()
info["rootless"] = unshare.IsRootless()
unified, err := cgroups.IsCgroup2UnifiedMode()
if err != nil {
logrus.Error(err, "err reading cgroups mode")
}
cgroupVersion := "v1"
if unified {
cgroupVersion = "v2"
}
info["CgroupVersion"] = cgroupVersion
mi, err := system.ReadMemInfo()
if err != nil {
logrus.Error(err, "err reading memory info")
info["MemTotal"] = ""
info["MenFree"] = ""
info["SwapTotal"] = ""
info["SwapFree"] = ""
} else {
info["MemTotal"] = mi.MemTotal
info["MenFree"] = mi.MemFree
info["SwapTotal"] = mi.SwapTotal
info["SwapFree"] = mi.SwapFree
}
hostDistributionInfo := getHostDistributionInfo()
info["Distribution"] = map[string]interface{}{
"distribution": hostDistributionInfo["Distribution"],
"version": hostDistributionInfo["Version"],
}
kv, err := readKernelVersion()
if err != nil {
logrus.Error(err, "error reading kernel version")
}
info["kernel"] = kv
up, err := readUptime()
if err != nil {
logrus.Error(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 {
logrus.Error(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 {
logrus.Error(err, "error getting hostname")
}
info["hostname"] = host
return info
}
// top-level "store" info
func storeInfo(store storage.Store) (map[string]interface{}, error) {
// lets say storage driver in use, number of images, number of containers
info := map[string]interface{}{}
info["GraphRoot"] = store.GraphRoot()
info["RunRoot"] = store.RunRoot()
info["GraphDriverName"] = store.GraphDriverName()
info["GraphOptions"] = store.GraphOptions()
statusPairs, err := 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 := store.Images()
if err != nil {
logrus.Error(err, "error getting number of images")
}
info["ImageStore"] = map[string]interface{}{
"number": len(images),
}
containers, err := store.Containers()
if err != nil {
logrus.Error(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
}
// getHostDistributionInfo returns a map containing the host's distribution and version
func 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
}
|
