mirror of https://github.com/containers/podman.git
337 lines
8.5 KiB
Go
337 lines
8.5 KiB
Go
package libpod
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import (
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"bufio"
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"bytes"
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"fmt"
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"io/ioutil"
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"os"
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"os/exec"
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"runtime"
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"strconv"
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"strings"
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"time"
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"github.com/containers/buildah"
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"github.com/containers/podman/v2/libpod/define"
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"github.com/containers/podman/v2/libpod/linkmode"
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"github.com/containers/podman/v2/pkg/cgroups"
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registries2 "github.com/containers/podman/v2/pkg/registries"
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"github.com/containers/podman/v2/pkg/rootless"
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"github.com/containers/storage"
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"github.com/containers/storage/pkg/system"
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"github.com/pkg/errors"
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"github.com/sirupsen/logrus"
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)
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// Info returns the store and host information
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func (r *Runtime) info() (*define.Info, error) {
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info := define.Info{}
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versionInfo, err := define.GetVersion()
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if err != nil {
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return nil, errors.Wrapf(err, "error getting version info")
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}
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info.Version = versionInfo
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// get host information
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hostInfo, err := r.hostInfo()
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if err != nil {
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return nil, errors.Wrapf(err, "error getting host info")
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}
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info.Host = hostInfo
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// get store information
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storeInfo, err := r.storeInfo()
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if err != nil {
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return nil, errors.Wrapf(err, "error getting store info")
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}
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info.Store = storeInfo
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registries := make(map[string]interface{})
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data, err := registries2.GetRegistriesData()
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if err != nil {
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return nil, errors.Wrapf(err, "error getting registries")
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}
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for _, reg := range data {
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registries[reg.Prefix] = reg
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}
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regs, err := registries2.GetRegistries()
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if err != nil {
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return nil, errors.Wrapf(err, "error getting registries")
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}
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if len(regs) > 0 {
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registries["search"] = regs
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}
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info.Registries = registries
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return &info, nil
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}
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// top-level "host" info
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func (r *Runtime) hostInfo() (*define.HostInfo, error) {
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// lets say OS, arch, number of cpus, amount of memory, maybe os distribution/version, hostname, kernel version, uptime
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mi, err := system.ReadMemInfo()
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if err != nil {
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return nil, errors.Wrapf(err, "error reading memory info")
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}
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hostDistributionInfo := r.GetHostDistributionInfo()
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kv, err := readKernelVersion()
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if err != nil {
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return nil, errors.Wrapf(err, "error reading kernel version")
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}
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host, err := os.Hostname()
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if err != nil {
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return nil, errors.Wrapf(err, "error getting hostname")
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}
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info := define.HostInfo{
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Arch: runtime.GOARCH,
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BuildahVersion: buildah.Version,
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CgroupManager: r.config.Engine.CgroupManager,
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Linkmode: linkmode.Linkmode(),
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CPUs: runtime.NumCPU(),
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Distribution: hostDistributionInfo,
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EventLogger: r.eventer.String(),
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Hostname: host,
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IDMappings: define.IDMappings{},
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Kernel: kv,
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MemFree: mi.MemFree,
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MemTotal: mi.MemTotal,
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OS: runtime.GOOS,
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Rootless: rootless.IsRootless(),
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Slirp4NetNS: define.SlirpInfo{},
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SwapFree: mi.SwapFree,
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SwapTotal: mi.SwapTotal,
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}
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// CGroups version
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unified, err := cgroups.IsCgroup2UnifiedMode()
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if err != nil {
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return nil, errors.Wrapf(err, "error reading cgroups mode")
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}
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cgroupVersion := "v1"
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if unified {
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cgroupVersion = "v2"
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}
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info.CGroupsVersion = cgroupVersion
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if rootless.IsRootless() {
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if path, err := exec.LookPath("slirp4netns"); err == nil {
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logrus.Warnf("Failed to retrieve program version for %s: %v", path, err)
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version, err := programVersion(path)
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if err != nil {
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logrus.Warnf("Failed to retrieve program version for %s: %v", path, err)
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}
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program := define.SlirpInfo{
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Executable: path,
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Package: packageVersion(path),
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Version: version,
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}
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info.Slirp4NetNS = program
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}
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uidmappings, err := rootless.ReadMappingsProc("/proc/self/uid_map")
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if err != nil {
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return nil, errors.Wrapf(err, "error reading uid mappings")
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}
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gidmappings, err := rootless.ReadMappingsProc("/proc/self/gid_map")
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if err != nil {
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return nil, errors.Wrapf(err, "error reading gid mappings")
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}
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idmappings := define.IDMappings{
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GIDMap: gidmappings,
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UIDMap: uidmappings,
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}
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info.IDMappings = idmappings
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}
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conmonInfo, ociruntimeInfo, err := r.defaultOCIRuntime.RuntimeInfo()
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if err != nil {
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logrus.Errorf("Error getting info on OCI runtime %s: %v", r.defaultOCIRuntime.Name(), err)
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} else {
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info.Conmon = conmonInfo
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info.OCIRuntime = ociruntimeInfo
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}
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up, err := readUptime()
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if err != nil {
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return nil, errors.Wrapf(err, "error reading up time")
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}
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// Convert uptime in seconds to a human-readable format
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upSeconds := up + "s"
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upDuration, err := time.ParseDuration(upSeconds)
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if err != nil {
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return nil, errors.Wrapf(err, "error parsing system uptime")
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}
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// TODO Isn't there a simple lib for this, something like humantime?
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hoursFound := false
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var timeBuffer bytes.Buffer
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var hoursBuffer bytes.Buffer
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for _, elem := range upDuration.String() {
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timeBuffer.WriteRune(elem)
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if elem == 'h' || elem == 'm' {
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timeBuffer.WriteRune(' ')
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if elem == 'h' {
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hoursFound = true
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}
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}
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if !hoursFound {
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hoursBuffer.WriteRune(elem)
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}
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}
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info.Uptime = timeBuffer.String()
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if hoursFound {
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hours, err := strconv.ParseFloat(hoursBuffer.String(), 64)
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if err == nil {
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days := hours / 24
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info.Uptime = fmt.Sprintf("%s (Approximately %.2f days)", info.Uptime, days)
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}
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}
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return &info, nil
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}
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func (r *Runtime) getContainerStoreInfo() (define.ContainerStore, error) {
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var (
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paused, running, stopped int
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)
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cs := define.ContainerStore{}
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cons, err := r.GetAllContainers()
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if err != nil {
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return cs, err
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}
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cs.Number = len(cons)
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for _, con := range cons {
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state, err := con.State()
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if err != nil {
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if errors.Cause(err) == define.ErrNoSuchCtr {
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// container was probably removed
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cs.Number--
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continue
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}
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return cs, err
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}
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switch state {
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case define.ContainerStateRunning:
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running += 1
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case define.ContainerStatePaused:
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paused += 1
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default:
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stopped += 1
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}
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}
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cs.Paused = paused
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cs.Stopped = stopped
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cs.Running = running
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return cs, nil
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}
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// top-level "store" info
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func (r *Runtime) storeInfo() (*define.StoreInfo, error) {
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// lets say storage driver in use, number of images, number of containers
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configFile, err := storage.DefaultConfigFile(rootless.IsRootless())
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if err != nil {
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return nil, err
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}
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images, err := r.store.Images()
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if err != nil {
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return nil, errors.Wrapf(err, "error getting number of images")
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}
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conInfo, err := r.getContainerStoreInfo()
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if err != nil {
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return nil, err
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}
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imageInfo := define.ImageStore{Number: len(images)}
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info := define.StoreInfo{
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ImageStore: imageInfo,
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ContainerStore: conInfo,
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GraphRoot: r.store.GraphRoot(),
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RunRoot: r.store.RunRoot(),
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GraphDriverName: r.store.GraphDriverName(),
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GraphOptions: nil,
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VolumePath: r.config.Engine.VolumePath,
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ConfigFile: configFile,
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}
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graphOptions := map[string]interface{}{}
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for _, o := range r.store.GraphOptions() {
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split := strings.SplitN(o, "=", 2)
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if strings.HasSuffix(split[0], "mount_program") {
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version, err := programVersion(split[1])
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if err != nil {
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logrus.Warnf("Failed to retrieve program version for %s: %v", split[1], err)
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}
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program := map[string]interface{}{}
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program["Executable"] = split[1]
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program["Version"] = version
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program["Package"] = packageVersion(split[1])
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graphOptions[split[0]] = program
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} else {
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graphOptions[split[0]] = split[1]
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}
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}
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info.GraphOptions = graphOptions
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statusPairs, err := r.store.Status()
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if err != nil {
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return nil, err
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}
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status := map[string]string{}
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for _, pair := range statusPairs {
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status[pair[0]] = pair[1]
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}
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info.GraphStatus = status
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return &info, nil
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}
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func readKernelVersion() (string, error) {
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buf, err := ioutil.ReadFile("/proc/version")
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if err != nil {
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return "", err
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}
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f := bytes.Fields(buf)
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if len(f) < 2 {
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return string(bytes.TrimSpace(buf)), nil
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}
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return string(f[2]), nil
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}
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func readUptime() (string, error) {
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buf, err := ioutil.ReadFile("/proc/uptime")
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if err != nil {
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return "", err
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}
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f := bytes.Fields(buf)
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if len(f) < 1 {
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return "", fmt.Errorf("invalid uptime")
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}
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return string(f[0]), nil
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}
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// GetHostDistributionInfo returns a map containing the host's distribution and version
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func (r *Runtime) GetHostDistributionInfo() define.DistributionInfo {
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// Populate values in case we cannot find the values
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// or the file
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dist := define.DistributionInfo{
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Distribution: "unknown",
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Version: "unknown",
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}
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f, err := os.Open("/etc/os-release")
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if err != nil {
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return dist
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}
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defer f.Close()
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l := bufio.NewScanner(f)
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for l.Scan() {
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if strings.HasPrefix(l.Text(), "ID=") {
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dist.Distribution = strings.TrimPrefix(l.Text(), "ID=")
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}
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if strings.HasPrefix(l.Text(), "VERSION_ID=") {
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dist.Version = strings.Trim(strings.TrimPrefix(l.Text(), "VERSION_ID="), "\"")
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}
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}
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return dist
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}
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