package libpod import ( "bufio" "bytes" "fmt" "io/ioutil" "os" "os/exec" "runtime" "strconv" "strings" "time" "github.com/containers/buildah" "github.com/containers/podman/v2/libpod/define" "github.com/containers/podman/v2/libpod/linkmode" "github.com/containers/podman/v2/pkg/cgroups" registries2 "github.com/containers/podman/v2/pkg/registries" "github.com/containers/podman/v2/pkg/rootless" "github.com/containers/storage" "github.com/containers/storage/pkg/system" "github.com/pkg/errors" "github.com/sirupsen/logrus" ) // Info returns the store and host information func (r *Runtime) info() (*define.Info, error) { info := define.Info{} versionInfo, err := define.GetVersion() if err != nil { return nil, errors.Wrapf(err, "error getting version info") } info.Version = versionInfo // get host information hostInfo, err := r.hostInfo() if err != nil { return nil, errors.Wrapf(err, "error getting host info") } info.Host = hostInfo // get store information storeInfo, err := r.storeInfo() if err != nil { return nil, errors.Wrapf(err, "error getting store info") } info.Store = storeInfo registries := make(map[string]interface{}) data, err := registries2.GetRegistriesData() if err != nil { return nil, errors.Wrapf(err, "error getting registries") } for _, reg := range data { registries[reg.Prefix] = reg } regs, err := registries2.GetRegistries() if err != nil { return nil, errors.Wrapf(err, "error getting registries") } if len(regs) > 0 { registries["search"] = regs } info.Registries = registries return &info, nil } // top-level "host" info func (r *Runtime) hostInfo() (*define.HostInfo, error) { // lets say OS, arch, number of cpus, amount of memory, maybe os distribution/version, hostname, kernel version, uptime mi, err := system.ReadMemInfo() if err != nil { return nil, errors.Wrapf(err, "error reading memory info") } hostDistributionInfo := r.GetHostDistributionInfo() kv, err := readKernelVersion() if err != nil { return nil, errors.Wrapf(err, "error reading kernel version") } host, err := os.Hostname() if err != nil { return nil, errors.Wrapf(err, "error getting hostname") } info := define.HostInfo{ Arch: runtime.GOARCH, BuildahVersion: buildah.Version, CgroupManager: r.config.Engine.CgroupManager, Linkmode: linkmode.Linkmode(), CPUs: runtime.NumCPU(), Distribution: hostDistributionInfo, EventLogger: r.eventer.String(), Hostname: host, IDMappings: define.IDMappings{}, Kernel: kv, MemFree: mi.MemFree, MemTotal: mi.MemTotal, OS: runtime.GOOS, Rootless: rootless.IsRootless(), Slirp4NetNS: define.SlirpInfo{}, SwapFree: mi.SwapFree, SwapTotal: mi.SwapTotal, } // CGroups version unified, err := cgroups.IsCgroup2UnifiedMode() if err != nil { return nil, errors.Wrapf(err, "error reading cgroups mode") } cgroupVersion := "v1" if unified { cgroupVersion = "v2" } info.CGroupsVersion = cgroupVersion if rootless.IsRootless() { if path, err := exec.LookPath("slirp4netns"); err == nil { logrus.Warnf("Failed to retrieve program version for %s: %v", path, err) version, err := programVersion(path) if err != nil { logrus.Warnf("Failed to retrieve program version for %s: %v", path, err) } program := define.SlirpInfo{ Executable: path, Package: packageVersion(path), Version: version, } info.Slirp4NetNS = program } uidmappings, err := rootless.ReadMappingsProc("/proc/self/uid_map") if err != nil { return nil, errors.Wrapf(err, "error reading uid mappings") } gidmappings, err := rootless.ReadMappingsProc("/proc/self/gid_map") if err != nil { return nil, errors.Wrapf(err, "error reading gid mappings") } idmappings := define.IDMappings{ GIDMap: gidmappings, UIDMap: uidmappings, } info.IDMappings = idmappings } conmonInfo, ociruntimeInfo, err := r.defaultOCIRuntime.RuntimeInfo() if err != nil { logrus.Errorf("Error getting info on OCI runtime %s: %v", r.defaultOCIRuntime.Name(), err) } else { info.Conmon = conmonInfo info.OCIRuntime = ociruntimeInfo } 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") } // TODO Isn't there a simple lib for this, something like humantime? 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) } } return &info, nil } func (r *Runtime) getContainerStoreInfo() (define.ContainerStore, error) { var ( paused, running, stopped int ) cs := define.ContainerStore{} cons, err := r.GetAllContainers() if err != nil { return cs, err } cs.Number = len(cons) for _, con := range cons { state, err := con.State() if err != nil { if errors.Cause(err) == define.ErrNoSuchCtr { // container was probably removed cs.Number-- continue } return cs, err } switch state { case define.ContainerStateRunning: running += 1 case define.ContainerStatePaused: paused += 1 default: stopped += 1 } } cs.Paused = paused cs.Stopped = stopped cs.Running = running return cs, nil } // top-level "store" info func (r *Runtime) storeInfo() (*define.StoreInfo, error) { // lets say storage driver in use, number of images, number of containers configFile, err := storage.DefaultConfigFile(rootless.IsRootless()) if err != nil { return nil, err } images, err := r.store.Images() if err != nil { return nil, errors.Wrapf(err, "error getting number of images") } conInfo, err := r.getContainerStoreInfo() if err != nil { return nil, err } imageInfo := define.ImageStore{Number: len(images)} info := define.StoreInfo{ ImageStore: imageInfo, ContainerStore: conInfo, GraphRoot: r.store.GraphRoot(), RunRoot: r.store.RunRoot(), GraphDriverName: r.store.GraphDriverName(), GraphOptions: nil, VolumePath: r.config.Engine.VolumePath, ConfigFile: configFile, } graphOptions := map[string]interface{}{} for _, o := range r.store.GraphOptions() { split := strings.SplitN(o, "=", 2) if strings.HasSuffix(split[0], "mount_program") { version, err := programVersion(split[1]) if err != nil { logrus.Warnf("Failed to retrieve program version for %s: %v", split[1], err) } program := map[string]interface{}{} program["Executable"] = split[1] program["Version"] = version program["Package"] = packageVersion(split[1]) graphOptions[split[0]] = program } else { graphOptions[split[0]] = split[1] } } info.GraphOptions = 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 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 (r *Runtime) GetHostDistributionInfo() define.DistributionInfo { // Populate values in case we cannot find the values // or the file dist := define.DistributionInfo{ Distribution: "unknown", 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 }