Fix nerdctl info missing on Windows

Signed-off-by: Tina Murimi <mor.devx@outlook.com>

pkg/cmd/system/info.go

@@ -25,19 +25,19 @@ import (
 	"text/template"
 
 	"github.com/containerd/containerd"
+	"github.com/containerd/containerd/api/services/introspection/v1"
 	"github.com/containerd/log"
-	"github.com/containerd/nerdctl/v2/pkg/api/types"
+	"github.com/docker/go-units"
 	"golang.org/x/text/cases"
 	"golang.org/x/text/language"
 
-	"github.com/containerd/containerd/api/services/introspection/v1"
+	"github.com/containerd/nerdctl/v2/pkg/api/types"
 	"github.com/containerd/nerdctl/v2/pkg/formatter"
 	"github.com/containerd/nerdctl/v2/pkg/infoutil"
 	"github.com/containerd/nerdctl/v2/pkg/inspecttypes/dockercompat"
 	"github.com/containerd/nerdctl/v2/pkg/inspecttypes/native"
 	"github.com/containerd/nerdctl/v2/pkg/rootlessutil"
 	"github.com/containerd/nerdctl/v2/pkg/strutil"
-	"github.com/docker/go-units"
 )
 
 func Info(ctx context.Context, client *containerd.Client, options types.SystemInfoOptions) error {
@@ -153,13 +153,45 @@ func prettyPrintInfoDockerCompat(stdout io.Writer, stderr io.Writer, info *docke
 	// Storage Driver is not really Server concept for nerdctl, but mimics `docker info` output
 	fmt.Fprintf(w, " Storage Driver: %s\n", info.Driver)
 	fmt.Fprintf(w, " Logging Driver: %s\n", info.LoggingDriver)
-	fmt.Fprintf(w, " Cgroup Driver: %s\n", info.CgroupDriver)
-	fmt.Fprintf(w, " Cgroup Version: %s\n", info.CgroupVersion)
+	printF(w, " Cgroup Driver:  ", info.CgroupDriver)
+	printF(w, " Cgroup Version: ", info.CgroupVersion)
 	fmt.Fprintf(w, " Plugins:\n")
-	fmt.Fprintf(w, "  Log: %s\n", strings.Join(info.Plugins.Log, " "))
+	fmt.Fprintf(w, "  Log:     %s\n", strings.Join(info.Plugins.Log, " "))
 	fmt.Fprintf(w, "  Storage: %s\n", strings.Join(info.Plugins.Storage, " "))
+
+	// print Security options
+	printSecurityOptions(w, info.SecurityOptions)
+
+	fmt.Fprintf(w, " Kernel Version:   %s\n", info.KernelVersion)
+	fmt.Fprintf(w, " Operating System: %s\n", info.OperatingSystem)
+	fmt.Fprintf(w, " OSType:           %s\n", info.OSType)
+	fmt.Fprintf(w, " Architecture:     %s\n", info.Architecture)
+	fmt.Fprintf(w, " CPUs:             %d\n", info.NCPU)
+	fmt.Fprintf(w, " Total Memory:     %s\n", units.BytesSize(float64(info.MemTotal)))
+	fmt.Fprintf(w, " Name:             %s\n", info.Name)
+	fmt.Fprintf(w, " ID:               %s\n", info.ID)
+
+	fmt.Fprintln(w)
+	if len(info.Warnings) > 0 {
+		fmt.Fprintln(stderr, strings.Join(info.Warnings, "\n"))
+	}
+	return nil
+}
+
+func printF(w io.Writer, label string, dockerCompatInfo string) {
+	if dockerCompatInfo == "" {
+		return
+	}
+	fmt.Fprintf(w, " %s: %s\n", label, dockerCompatInfo)
+}
+
+func printSecurityOptions(w io.Writer, securityOptions []string) {
+	if len(securityOptions) == 0 {
+		return
+	}
+
 	fmt.Fprintf(w, " Security Options:\n")
-	for _, s := range info.SecurityOptions {
+	for _, s := range securityOptions {
 		m, err := strutil.ParseCSVMap(s)
 		if err != nil {
 			log.L.WithError(err).Warnf("unparsable security option %q", s)
@@ -175,21 +207,7 @@ func prettyPrintInfoDockerCompat(stdout io.Writer, stderr io.Writer, info *docke
 			if k == "name" {
 				continue
 			}
-			fmt.Fprintf(w, "   %s: %s\n", cases.Title(language.English).String(k), v)
+			fmt.Fprintf(w, "   %s:\t%s\n", cases.Title(language.English).String(k), v)
 		}
 	}
-	fmt.Fprintf(w, " Kernel Version: %s\n", info.KernelVersion)
-	fmt.Fprintf(w, " Operating System: %s\n", info.OperatingSystem)
-	fmt.Fprintf(w, " OSType: %s\n", info.OSType)
-	fmt.Fprintf(w, " Architecture: %s\n", info.Architecture)
-	fmt.Fprintf(w, " CPUs: %d\n", info.NCPU)
-	fmt.Fprintf(w, " Total Memory: %s\n", units.BytesSize(float64(info.MemTotal)))
-	fmt.Fprintf(w, " Name: %s\n", info.Name)
-	fmt.Fprintf(w, " ID: %s\n", info.ID)
-
-	fmt.Fprintln(w)
-	if len(info.Warnings) > 0 {
-		fmt.Fprintln(stderr, strings.Join(info.Warnings, "\n"))
-	}
-	return nil
 }

pkg/infoutil/infoutil_unix.go

@@ -23,7 +23,6 @@ import (
 	"io"
 	"os"
 	"regexp"
-
 	"strings"
 
 	"golang.org/x/sys/unix"

pkg/infoutil/infoutil_windows.go

@@ -17,33 +17,210 @@
 package infoutil
 
 import (
-	"github.com/containerd/nerdctl/v2/pkg/inspecttypes/dockercompat"
+	"fmt"
+	"runtime"
+	"strings"
+
+	"github.com/containerd/log"
+	"github.com/docker/docker/pkg/meminfo"
 	"github.com/docker/docker/pkg/sysinfo"
+	"golang.org/x/sys/windows"
+	"golang.org/x/sys/windows/registry"
+
+	"github.com/containerd/nerdctl/v2/pkg/inspecttypes/dockercompat"
 )
 
-// UnameR returns `uname -r`
+const UnameO = "Microsoft Windows"
+
+// MsiNTProductType is the product type of the operating system.
+// https://learn.microsoft.com/en-us/windows/win32/msi/msintproducttype
+// Ref: https://docs.microsoft.com/en-us/windows/win32/api/winnt/ns-winnt-osversioninfoexa
+const (
+	verNTServer = 0x0000003
+)
+
+type windowsInfoUtil interface {
+	RtlGetVersion() *windows.OsVersionInfoEx
+	GetRegistryStringValue(key registry.Key, path string, name string) (string, error)
+	GetRegistryIntValue(key registry.Key, path string, name string) (int, error)
+}
+
+type winInfoUtil struct{}
+
+// RtlGetVersion implements the RtlGetVersion method using the actual windows package
+func (sw *winInfoUtil) RtlGetVersion() *windows.OsVersionInfoEx {
+	return windows.RtlGetVersion()
+}
+
+// UnameR returns the Kernel version
 func UnameR() string {
-	return ""
+	util := &winInfoUtil{}
+	version, err := getKernelVersion(util)
+	if err != nil {
+		log.L.Error(err.Error())
+	}
+
+	return version
 }
 
-// UnameM returns `uname -m`
+// UnameM returns the architecture of the system
 func UnameM() string {
-	return ""
+	arch := runtime.GOARCH
+
+	if strings.ToLower(arch) == "amd64" {
+		return "x86_64"
+	}
+
+	// "386": 32-bit Intel/AMD processors (x86 architecture)
+	if strings.ToLower(arch) == "386" {
+		return "x86"
+	}
+
+	// arm, s390x, and so on
+	return arch
 }
 
+// DistroName returns version information about the currently running operating system
 func DistroName() string {
-	return ""
+	util := &winInfoUtil{}
+	version, err := distroName(util)
+	if err != nil {
+		log.L.Error(err.Error())
+	}
+
+	return version
 }
 
+func distroName(sw windowsInfoUtil) (string, error) {
+	// Get the OS version information from the Windows registry
+	regPath := `SOFTWARE\Microsoft\Windows NT\CurrentVersion`
+
+	// Eg. 22631 (REG_SZ)
+	currBuildNo, err := sw.GetRegistryStringValue(registry.LOCAL_MACHINE, regPath, "CurrentBuildNumber")
+	if err != nil {
+		return "", fmt.Errorf("failed to get os version (build number) %v", err)
+	}
+
+	// Eg. 23H2 (REG_SZ)
+	displayVersion, err := sw.GetRegistryStringValue(registry.LOCAL_MACHINE, regPath, "DisplayVersion")
+	if err != nil {
+		return "", fmt.Errorf("failed to get os version (display version) %v", err)
+	}
+
+	// UBR: Update Build Revision. Eg. 3737 (REG_DWORD 32-bit Value)
+	ubr, err := sw.GetRegistryIntValue(registry.LOCAL_MACHINE, regPath, "UBR")
+	if err != nil {
+		return "", fmt.Errorf("failed to get os version (ubr) %v", err)
+	}
+
+	productType := ""
+	if isWindowsServer(sw) {
+		productType = "Server"
+	}
+
+	// Concatenate the reg.key values to get the OS version information
+	// Example: "Microsoft Windows Version 23H2 (OS Build 22631.3737)"
+	versionString := fmt.Sprintf("%s %s Version %s (OS Build %s.%d)",
+		UnameO,
+		productType,
+		displayVersion,
+		currBuildNo,
+		ubr,
+	)
+
+	// Replace double spaces with single spaces
+	versionString = strings.ReplaceAll(versionString, "  ", " ")
+
+	return versionString, nil
+}
+
+func getKernelVersion(sw windowsInfoUtil) (string, error) {
+	// Get BuildLabEx value from the Windows registry
+	// [buiild number].[revision number].[architecture].[branch].[date]-[time]
+	// Eg. "BuildLabEx: 10240.16412.amd64fre.th1.150729-1800"
+	buildLab, err := sw.GetRegistryStringValue(registry.LOCAL_MACHINE, `SOFTWARE\Microsoft\Windows NT\CurrentVersion`, "BuildLabEx")
+	if err != nil {
+		return "", err
+	}
+
+	// Get Version: Contains the major and minor version numbers of the operating system.
+	// Eg. "10.0"
+	osvi := sw.RtlGetVersion()
+
+	// Concatenate the OS version and BuildLabEx values to get the Kernel version information
+	// Example: "10.0 22631 (10240.16412.amd64fre.th1.150729-1800)"
+	version := fmt.Sprintf("%d.%d %d (%s)", osvi.MajorVersion, osvi.MinorVersion, osvi.BuildNumber, buildLab)
+	return version, nil
+}
+
+// GetRegistryStringValue retrieves a string value from the Windows registry
+func (sw *winInfoUtil) GetRegistryStringValue(key registry.Key, path string, name string) (string, error) {
+	k, err := registry.OpenKey(key, path, registry.QUERY_VALUE)
+	if err != nil {
+		return "", err
+	}
+	defer k.Close()
+
+	v, _, err := k.GetStringValue(name)
+	if err != nil {
+		return "", err
+	}
+	return v, nil
+}
+
+// GetRegistryIntValue retrieves an integer value from the Windows registry
+func (sw *winInfoUtil) GetRegistryIntValue(key registry.Key, path string, name string) (int, error) {
+	k, err := registry.OpenKey(key, path, registry.QUERY_VALUE)
+	if err != nil {
+		return 0, err
+	}
+	defer k.Close()
+
+	v, _, err := k.GetIntegerValue(name)
+	if err != nil {
+		return 0, err
+	}
+	return int(v), nil
+}
+
+func isWindowsServer(sw windowsInfoUtil) bool {
+	osvi := sw.RtlGetVersion()
+	return osvi.ProductType == verNTServer
+}
+
+// Cgroups not supported on Windows
 func CgroupsVersion() string {
 	return ""
 }
 
 func fulfillPlatformInfo(info *dockercompat.Info) {
-	// unimplemented
+	mobySysInfo := mobySysInfo(info)
+
+	// NOTE: cgroup fields are not available on Windows
+	// https://techcommunity.microsoft.com/t5/containers/introducing-the-host-compute-service-hcs/ba-p/382332
+
+	info.IPv4Forwarding = !mobySysInfo.IPv4ForwardingDisabled
+	if !info.IPv4Forwarding {
+		info.Warnings = append(info.Warnings, "WARNING: IPv4 forwarding is disabled")
+	}
+	info.BridgeNfIptables = !mobySysInfo.BridgeNFCallIPTablesDisabled
+	if !info.BridgeNfIptables {
+		info.Warnings = append(info.Warnings, "WARNING: bridge-nf-call-iptables is disabled")
+	}
+	info.BridgeNfIP6tables = !mobySysInfo.BridgeNFCallIP6TablesDisabled
+	if !info.BridgeNfIP6tables {
+		info.Warnings = append(info.Warnings, "WARNING: bridge-nf-call-ip6tables is disabled")
+	}
+	info.NCPU = sysinfo.NumCPU()
+	memLimit, err := meminfo.Read()
+	if err != nil {
+		info.Warnings = append(info.Warnings, fmt.Sprintf("failed to read mem info: %v", err))
+	} else {
+		info.MemTotal = memLimit.MemTotal
+	}
 }
 
-func mobySysInfo(info *dockercompat.Info) *sysinfo.SysInfo {
+func mobySysInfo(_ *dockercompat.Info) *sysinfo.SysInfo {
 	var sysinfo sysinfo.SysInfo
 	return &sysinfo
 }