бла бла бла

2026-10-28 15:50:34 +01:00
parent 2e8428de4e
commit fb27de5e7f
21 changed files with 858 additions and 541 deletions
@@ -1,66 +1,89 @@

 package com.htopweb.system;

+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import oshi.SystemInfo;
 import oshi.hardware.CentralProcessor;
 import oshi.hardware.GlobalMemory;
 import oshi.hardware.HardwareAbstractionLayer;
 import oshi.software.os.OperatingSystem;
-
 import org.springframework.stereotype.Service;

+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.HashMap;
+import java.util.Locale;
+import java.util.Map;
+
@Service
 public class SystemMetricsService {

-    private final SystemInfo _systemInfo;
-    private final HardwareAbstractionLayer _hardware;
+    private static final Path HOST_ROOT = Path.of("/host/root");
+    private static final Path HOST_PROC = HOST_ROOT.resolve("proc");
+
    private final OperatingSystem _operatingSystem;
    private final CentralProcessor _processor;
    private final GlobalMemory _memory;

-    private long[] _previousCpuTicks;
+    private CpuTicks _previousHostCpuTicks;
+
+    private static final Logger log =
+            LoggerFactory.getLogger(SystemMetricsService.class);

    public SystemMetricsService() {
-        _systemInfo = new SystemInfo();
-        _hardware = _systemInfo.getHardware();
-        _operatingSystem = _systemInfo.getOperatingSystem();
-        _processor = _hardware.getProcessor();
-        _memory = _hardware.getMemory();
+        SystemInfo systemInfo = new SystemInfo();
+        HardwareAbstractionLayer hardware = systemInfo.getHardware();

-        _previousCpuTicks = _processor.getSystemCpuLoadTicks();
+        _operatingSystem = systemInfo.getOperatingSystem();
+        _processor = hardware.getProcessor();
+        _memory = hardware.getMemory();
+
+        _previousHostCpuTicks = readHostCpuTicks();
    }

    public synchronized SystemMetricsResponse getMetrics() {
-        long[] currentCpuTicks = _processor.getSystemCpuLoadTicks();
+        CpuTicks currentTicks = readHostCpuTicks();
+        double cpuUsage = 0.0;

-        double cpuUsage = _processor.getSystemCpuLoadBetweenTicks(
-                _previousCpuTicks,
-                currentCpuTicks
-        );
+        if (currentTicks != null && _previousHostCpuTicks != null) {
+            long totalDelta = currentTicks.total() - _previousHostCpuTicks.total();
+            long idleDelta = currentTicks.idle() - _previousHostCpuTicks.idle();

-        _previousCpuTicks = currentCpuTicks;
-
-        if (Double.isNaN(cpuUsage) || Double.isInfinite(cpuUsage)) {
-            cpuUsage = 0.0;
+            if (totalDelta > 0 && idleDelta >= 0 && idleDelta <= totalDelta) {
+                cpuUsage = (double) (totalDelta - idleDelta) / totalDelta;
+            }
        }

-        // Task Manager displays system CPU usage in the 0–100% range.
-        cpuUsage = Math.max(0.0, Math.min(1.0, cpuUsage));
+        if (currentTicks != null) {
+            _previousHostCpuTicks = currentTicks;
+        }
+
+        Map<String, Long> hostMemory = readHostMemory();
+
+        long totalMemory = hostMemory.getOrDefault("MemTotal", _memory.getTotal());
+        long availableMemory = hostMemory.getOrDefault(
+                "MemAvailable",
+                _memory.getAvailable()
+        );
+
+        availableMemory = Math.max(0L, Math.min(totalMemory, availableMemory));

-        long totalMemory = _memory.getTotal();
-        long availableMemory = _memory.getAvailable();
        long usedMemory = Math.max(0L, totalMemory - availableMemory);

        double memoryUsage = totalMemory > 0
                ? (double) usedMemory / totalMemory * 100.0
                : 0.0;

+        Map<String, String> osRelease = readHostOsRelease();
+
        return new SystemMetricsResponse(
-                _operatingSystem.getFamily(),
-                _operatingSystem.getVersionInfo().getVersion(),
-                _operatingSystem.getNetworkParams().getHostName(),
+                getHostOsFamily(osRelease),
+                getHostOsVersion(osRelease),
+                readHostHostname(),
                _processor.getProcessorIdentifier().getName(),
-                _processor.getLogicalProcessorCount(),
+                getLogicalProcessorCount(),
                round(cpuUsage * 100.0),
                totalMemory,
                availableMemory,
@@ -69,7 +92,187 @@ public class SystemMetricsService {
        );
    }

+    private CpuTicks readHostCpuTicks() {
+        Path statFile = HOST_PROC.resolve("stat");
+
+        try {
+            if (!Files.isRegularFile(statFile)
+                    || !Files.isReadable(statFile)) {
+                log.warn("Host CPU statistics are unavailable: {}", statFile);
+                return null;
+            }
+
+            for (String line : Files.readAllLines(statFile)) {
+                if (!line.startsWith("cpu ")) {
+                    continue;
+                }
+
+                String[] fields = line.trim().split("\\s+");
+                if (fields.length < 5) {
+                    log.warn("Invalid host CPU statistics in {}", statFile);
+                    return null;
+                }
+
+                long total = 0L;
+
+                for (int i = 1; i < fields.length; i++) {
+                    total += Long.parseLong(fields[i]);
+                }
+
+                long idle = Long.parseLong(fields[4]);
+
+                if (fields.length > 5) {
+                    idle += Long.parseLong(fields[5]);
+                }
+
+                return new CpuTicks(total, idle);
+            }
+
+            log.warn("Aggregate CPU line not found in {}", statFile);
+        } catch (IOException | NumberFormatException e) {
+            log.warn("Failed to read host CPU statistics: {}", e.getMessage());
+        }
+
+        return null;
+    }
+
+    private Map<String, Long> readHostMemory() {
+        Map<String, Long> values = new HashMap<>();
+        Path meminfoFile = HOST_PROC.resolve("meminfo");
+
+        try {
+            if (!Files.isRegularFile(meminfoFile)) {
+                return values;
+            }
+
+            for (String line : Files.readAllLines(meminfoFile)) {
+                int separator = line.indexOf(':');
+
+                if (separator < 0) {
+                    continue;
+                }
+
+                String key = line.substring(0, separator).trim();
+
+                if (!key.equals("MemTotal") && !key.equals("MemAvailable")) {
+                    continue;
+                }
+
+                String[] parts = line.substring(separator + 1).trim().split("\\s+");
+
+                if (parts.length > 0) {
+                    // Linux meminfo values are reported in kB.
+                    values.put(key, Long.parseLong(parts[0]) * 1024L);
+                }
+            }
+        } catch (IOException | NumberFormatException ignored) {
+            // Use OSHI values when host meminfo is unavailable.
+        }
+
+        return values;
+    }
+
+    private int getLogicalProcessorCount() {
+        Path statFile = HOST_PROC.resolve("stat");
+
+        try {
+            if (Files.isRegularFile(statFile)) {
+                int count = 0;
+
+                for (String line : Files.readAllLines(statFile)) {
+                    if (line.matches("^cpu\\d+\\s+.*")) {
+                        count++;
+                    }
+                }
+
+                if (count > 0) {
+                    return count;
+                }
+            }
+        } catch (IOException ignored) {
+            // Fall back to OSHI.
+        }
+
+        return _processor.getLogicalProcessorCount();
+    }
+
+    private String readHostHostname() {
+        try {
+            Path file = HOST_ROOT.resolve("etc/hostname");
+
+            if (Files.isRegularFile(file)) {
+                String hostname = Files.readString(file).trim();
+
+                if (!hostname.isBlank()) {
+                    return hostname;
+                }
+            }
+        } catch (IOException ignored) {
+            // Fall back to OSHI.
+        }
+
+        return _operatingSystem.getNetworkParams().getHostName();
+    }
+
+    private Map<String, String> readHostOsRelease() {
+        Map<String, String> values = new HashMap<>();
+
+        try {
+            Path file = HOST_ROOT.resolve("etc/os-release");
+
+            if (!Files.isRegularFile(file)) {
+                return values;
+            }
+
+            for (String line : Files.readAllLines(file)) {
+                int separator = line.indexOf('=');
+
+                if (separator <= 0 || line.startsWith("#")) {
+                    continue;
+                }
+
+                String key = line.substring(0, separator).trim();
+                String value = line.substring(separator + 1).trim();
+
+                if (value.length() >= 2
+                        && ((value.startsWith("\"") && value.endsWith("\""))
+                        || (value.startsWith("'") && value.endsWith("'")))) {
+                    value = value.substring(1, value.length() - 1);
+                }
+
+                values.put(key, value);
+            }
+        } catch (IOException ignored) {
+            // Fall back to OSHI.
+        }
+
+        return values;
+    }
+
+    private String getHostOsFamily(Map<String, String> osRelease) {
+        String name = osRelease.get("NAME");
+
+        return name != null && !name.isBlank()
+                ? name
+                : _operatingSystem.getFamily();
+    }
+
+    private String getHostOsVersion(Map<String, String> osRelease) {
+        String version = osRelease.get("VERSION");
+
+        if (version == null || version.isBlank()) {
+            version = osRelease.get("VERSION_ID");
+        }
+
+        return version != null && !version.isBlank()
+                ? version
+                : _operatingSystem.getVersionInfo().getVersion();
+    }
+
    private double round(double value) {
        return Math.round(value * 10.0) / 10.0;
    }
+
+    private record CpuTicks(long total, long idle) {
+    }
 }
@@ -4,9 +4,14 @@ package com.htopweb.system;
 import oshi.SystemInfo;
 import oshi.software.os.OSProcess;
 import oshi.software.os.OperatingSystem;
-
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.stereotype.Service;

+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.ArrayList;
 import java.util.Comparator;
 import java.util.HashMap;
 import java.util.List;
@@ -15,15 +20,24 @@ import java.util.Map;
@Service
 public class SystemProcessesService {

+    private static final Logger log =
+            LoggerFactory.getLogger(SystemProcessesService.class);
+
+    private static final Path HOST_PROC = Path.of("/host/root/proc");
+    private static final Path PROC = Path.of("/proc");
+
    private final OperatingSystem _operatingSystem;
    private final int _logicalProcessorCount;
+    private final long _clockTicksPerSecond;
+    private final long _pageSizeBytes;

-    private final Map<Integer, OSProcess> _previousProcesses =
+    private final Map<Integer, ProcessSnapshot> _previousProcesses =
            new HashMap<>();

+    private long _previousSampleNanos = System.nanoTime();
+
    public SystemProcessesService() {
        SystemInfo systemInfo = new SystemInfo();
-
        _operatingSystem = systemInfo.getOperatingSystem();
        _logicalProcessorCount = Math.max(
                1,
@@ -31,55 +45,246 @@ public class SystemProcessesService {
                        .getProcessor()
                        .getLogicalProcessorCount()
        );
+
+        _clockTicksPerSecond = readPositiveSystemValue(
+                "getconf CLK_TCK", 100L
+        );
+        _pageSizeBytes = readPositiveSystemValue(
+                "getconf PAGESIZE", 4096L
+        );
    }

    public synchronized List<ProcessInfoResponse> getProcesses() {
-        List<OSProcess> processes = _operatingSystem.getProcesses();
-        Map<Integer, OSProcess> currentProcesses = new HashMap<>();
+        Path procRoot = Files.isDirectory(HOST_PROC) ? HOST_PROC : PROC;

-        List<ProcessInfoResponse> result = processes.stream()
-                .map(process -> {
-                    int pid = process.getProcessID();
-                    currentProcesses.put(pid, process);
+        if (!Files.isReadable(procRoot)) {
+            log.warn("Process information is unavailable: {}", procRoot);
+            return getProcessesFromOshi();
+        }

-                    OSProcess previous = _previousProcesses.get(pid);
-                    double cpuUsage = 0.0;
+        long nowNanos = System.nanoTime();
+        double elapsedSeconds =
+                (nowNanos - _previousSampleNanos) / 1_000_000_000.0;
+        _previousSampleNanos = nowNanos;

-                    if (pid != 0
-                            && previous != null
-                            && previous.getStartTime() == process.getStartTime()) {
+        long bootTimeSeconds = readBootTime(procRoot);
+        Map<Integer, ProcessSnapshot> currentProcesses = new HashMap<>();
+        List<ProcessInfoResponse> result = new ArrayList<>();

-                        cpuUsage = process.getProcessCpuLoadBetweenTicks(previous)
-                                * 100.0 / _logicalProcessorCount;
+        try (var entries = Files.list(procRoot)) {
+            entries.filter(path ->
+                            path.getFileName().toString().matches("\\d+"))
+                    .forEach(path -> {
+                        try {
+                            int pid = Integer.parseInt(
+                                    path.getFileName().toString()
+                            );

-                        cpuUsage = Math.max(0.0, Math.min(100.0, cpuUsage));
-                    }
+                            ProcessSnapshot current = readProcess(
+                                    path, pid, bootTimeSeconds
+                            );

-                    return new ProcessInfoResponse(
-                            pid,
-                            process.getName(),
-                            process.getState().name(),
-                            Math.round(cpuUsage * 10.0) / 10.0,
-                            process.getResidentMemory(),
-                            process.getVirtualSize(),
-                            Math.max(
-                                    0L,
-                                    (System.currentTimeMillis()
-                                            - process.getStartTime()) / 1000
-                            ),
-                            process.getThreadCount()
-                    );
-                })
-                .sorted(
-                        Comparator.comparingDouble(
-                                ProcessInfoResponse::cpuUsagePercent
-                        ).reversed()
-                )
-                .toList();
+                            if (current == null) {
+                                return;
+                            }
+
+                            currentProcesses.put(pid, current);
+
+                            ProcessSnapshot previous =
+                                    _previousProcesses.get(pid);
+
+                            double cpuUsage = 0.0;
+
+                            if (previous != null
+                                    && previous.startTimeTicks()
+                                    == current.startTimeTicks()
+                                    && elapsedSeconds > 0.0) {
+                                long deltaTicks =
+                                        current.cpuTicks() - previous.cpuTicks();
+
+                                if (deltaTicks >= 0) {
+                                    cpuUsage = deltaTicks
+                                            / (double) _clockTicksPerSecond
+                                            / elapsedSeconds
+                                            * 100.0
+                                            / _logicalProcessorCount;
+                                }
+                            }
+
+                            cpuUsage = Math.max(
+                                    0.0, Math.min(100.0, cpuUsage)
+                            );
+
+                            result.add(new ProcessInfoResponse(
+                                    pid,
+                                    current.name(),
+                                    current.state(),
+                                    Math.round(cpuUsage * 10.0) / 10.0,
+                                    current.residentMemoryBytes(),
+                                    current.virtualMemoryBytes(),
+                                    current.uptimeSeconds(),
+                                    current.threadCount()
+                            ));
+                        } catch (IOException | NumberFormatException
+                                 | SecurityException ignored) {
+                            // A process may exit or become inaccessible.
+                        }
+                    });
+        } catch (IOException e) {
+            log.warn("Cannot read process list from {}: {}",
+                    procRoot, e.getMessage());
+            return getProcessesFromOshi();
+        }

        _previousProcesses.clear();
        _previousProcesses.putAll(currentProcesses);

+        result.sort(Comparator.comparingDouble(
+                ProcessInfoResponse::cpuUsagePercent
+        ).reversed());
+
        return result;
    }
+
+    private ProcessSnapshot readProcess(
+            Path processPath,
+            int pid,
+            long bootTimeSeconds
+    ) throws IOException {
+        String stat = Files.readString(processPath.resolve("stat")).trim();
+
+        int open = stat.indexOf('(');
+        int close = stat.lastIndexOf(')');
+
+        if (open < 0 || close <= open) {
+            return null;
+        }
+
+        String name = stat.substring(open + 1, close);
+        String[] fields = stat.substring(close + 2).trim().split("\\s+");
+
+        // Array begins at Linux stat field 3 (state).
+        if (fields.length < 22) {
+            return null;
+        }
+
+        String state = fields[0];
+        long userTicks = Long.parseLong(fields[11]); // field 14
+        long systemTicks = Long.parseLong(fields[12]); // field 15
+        long startTicks = Long.parseLong(fields[19]); // field 22
+        long virtualBytes = Long.parseLong(fields[20]); // field 23
+        long residentPages = Long.parseLong(fields[21]); // field 24
+
+        int threadCount = readThreadCount(processPath.resolve("status"));
+
+        long uptimeSeconds = 0L;
+
+        if (bootTimeSeconds > 0L) {
+            long processStartSeconds = bootTimeSeconds
+                    + startTicks / _clockTicksPerSecond;
+            uptimeSeconds = Math.max(
+                    0L, System.currentTimeMillis() / 1000L
+                            - processStartSeconds
+            );
+        }
+
+        return new ProcessSnapshot(
+                pid,
+                name,
+                state,
+                userTicks + systemTicks,
+                startTicks,
+                Math.max(0L, virtualBytes),
+                Math.max(0L, residentPages) * _pageSizeBytes,
+                uptimeSeconds,
+                threadCount
+        );
+    }
+
+    private int readThreadCount(Path statusFile) {
+        try {
+            for (String line : Files.readAllLines(statusFile)) {
+                if (line.startsWith("Threads:")) {
+                    return Integer.parseInt(
+                            line.substring("Threads:".length()).trim()
+                    );
+                }
+            }
+        } catch (IOException | NumberFormatException ignored) {
+            // The process may exit while status is being read.
+        }
+
+        return 0;
+    }
+
+    private long readBootTime(Path procRoot) {
+        try {
+            for (String line : Files.readAllLines(procRoot.resolve("stat"))) {
+                if (line.startsWith("btime ")) {
+                    return Long.parseLong(line.substring(6).trim());
+                }
+            }
+        } catch (IOException | NumberFormatException ignored) {
+            // Boot time unavailable.
+        }
+
+        return 0L;
+    }
+
+    private long readPositiveSystemValue(String command, long fallback) {
+        try {
+            Process process = new ProcessBuilder(
+                    "/bin/sh", "-c", command
+            ).redirectErrorStream(true).start();
+
+            String output = new String(
+                    process.getInputStream().readAllBytes()
+            ).trim();
+
+            if (process.waitFor() == 0) {
+                long value = Long.parseLong(output);
+
+                if (value > 0L) {
+                    return value;
+                }
+            }
+        } catch (Exception e) {
+            log.debug("Cannot read system value for {}: {}", command,
+                    e.getMessage());
+        }
+
+        return fallback;
+    }
+
+    private List<ProcessInfoResponse> getProcessesFromOshi() {
+        return _operatingSystem.getProcesses().stream()
+                .map(process -> new ProcessInfoResponse(
+                        process.getProcessID(),
+                        process.getName(),
+                        process.getState().name(),
+                        0.0,
+                        process.getResidentMemory(),
+                        process.getVirtualSize(),
+                        Math.max(0L, (System.currentTimeMillis()
+                                - process.getStartTime()) / 1000L),
+                        process.getThreadCount()
+                ))
+                .sorted(Comparator.comparingLong(
+                        ProcessInfoResponse::residentMemoryBytes
+                ).reversed())
+                .toList();
+    }
+
+    private record ProcessSnapshot(
+            int pid,
+            String name,
+            String state,
+            long cpuTicks,
+            long startTimeTicks,
+            long virtualMemoryBytes,
+            long residentMemoryBytes,
+            long uptimeSeconds,
+            int threadCount
+    ) {
+    }
 }
@@ -1,54 +1,131 @@
+
 package com.htopweb.system.linux;

-import oshi.SystemInfo;
-import oshi.software.os.OSFileStore;
-import oshi.software.os.OperatingSystem;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.stereotype.Service;

+import java.io.IOException;
+import java.nio.file.FileStore;
+import java.nio.file.Files;
+import java.nio.file.Path;
 import java.util.Comparator;
 import java.util.List;
+import java.util.Objects;
+import java.util.Set;

@Service
 public class LinuxDiskService {

-    private final OperatingSystem _operatingSystem;
+    private static final Logger log =
+            LoggerFactory.getLogger(LinuxDiskService.class);

-    public LinuxDiskService() {
-        SystemInfo systemInfo = new SystemInfo();
-        _operatingSystem = systemInfo.getOperatingSystem();
-    }
+    private static final Path HOST_ROOT = Path.of("/host/root");
+    private static final Path HOST_MOUNTS =
+            HOST_ROOT.resolve("proc/1/mounts");
+
+    private static final Set<String> EXCLUDED_TYPES = Set.of(
+            "proc", "sysfs", "devtmpfs", "devpts", "tmpfs",
+            "cgroup", "cgroup2", "overlay", "squashfs",
+            "tracefs", "securityfs", "debugfs", "pstore",
+            "configfs", "fusectl", "mqueue", "hugetlbfs",
+            "rpc_pipefs", "autofs"
+    );

    public List<LinuxDiskResponse> getDisks() {
-        return _operatingSystem.getFileSystem()
-                .getFileStores()
-                .stream()
-                .filter(store -> store.getMount().startsWith("/"))
-                .filter(store -> store.getTotalSpace() > 0)
-                .map(this::toResponse)
-                .sorted(Comparator.comparing(LinuxDiskResponse::mountPoint))
-                .toList();
+        if (!Files.isReadable(HOST_MOUNTS)) {
+            log.error("Host mounts file is not readable: {}", HOST_MOUNTS);
+            return List.of();
+        }
+
+        try {
+            List<LinuxDiskResponse> disks = Files.readAllLines(HOST_MOUNTS)
+                    .stream()
+                    .map(line -> line.trim().split("\\s+"))
+                    .filter(fields -> fields.length >= 3)
+                    .filter(fields -> fields[0].startsWith("/dev/"))
+                    .filter(fields -> !EXCLUDED_TYPES.contains(fields[2]))
+                    .map(this::toHostResponse)
+                    .filter(Objects::nonNull)
+                    .collect(java.util.stream.Collectors.toMap(
+                            LinuxDiskResponse::mountPoint,
+                            disk -> disk,
+                            (first, second) -> first
+                    ))
+                    .values()
+                    .stream()
+                    .sorted(Comparator.comparing(
+                            LinuxDiskResponse::mountPoint
+                    ))
+                    .toList();
+
+            log.debug("Found {} host disks", disks.size());
+            return disks;
+        } catch (IOException e) {
+            log.error("Failed to read host mounts: {}", e.getMessage(), e);
+            return List.of();
+        }
    }

-    private LinuxDiskResponse toResponse(OSFileStore store) {
-        long total = Math.max(0L, store.getTotalSpace());
-        long usable = Math.max(
-                0L,
-                Math.min(total, store.getUsableSpace())
-        );
-        long used = Math.max(0L, total - usable);
+    private LinuxDiskResponse toHostResponse(String[] fields) {
+        String device = unescapeMountField(fields[0]);
+        String hostMount = unescapeMountField(fields[1]);
+        String type = fields[2];

-        double usage = total > 0
-                ? Math.round((double) used / total * 1000.0) / 10.0
-                : 0.0;
+        Path accessiblePath = HOST_ROOT.resolve(
+                hostMount.startsWith("/")
+                        ? hostMount.substring(1)
+                        : hostMount
+        ).normalize();

-        return new LinuxDiskResponse(
-                store.getName(),
-                store.getMount(),
-                store.getType(),
-                total,
-                usable,
-                used,
-                usage
-        );
+        if (!accessiblePath.startsWith(HOST_ROOT)
+                || !Files.exists(accessiblePath)) {
+            log.warn("Host mount path is unavailable: {}", accessiblePath);
+            return null;
+        }
+
+        try {
+            FileStore store = Files.getFileStore(accessiblePath);
+
+            long total = Math.max(0L, store.getTotalSpace());
+            long usable = Math.max(
+                    0L,
+                    Math.min(total, store.getUsableSpace())
+            );
+
+            if (total == 0L) {
+                log.warn("Host disk has zero capacity: {}", hostMount);
+                return null;
+            }
+
+            long used = total - usable;
+            double usage = Math.round(
+                    (double) used / total * 1000.0
+            ) / 10.0;
+
+            return new LinuxDiskResponse(
+                    device,
+                    hostMount,
+                    type,
+                    total,
+                    usable,
+                    used,
+                    usage
+            );
+        } catch (IOException | SecurityException e) {
+            log.warn(
+                    "Cannot read capacity for host mount {}: {}",
+                    hostMount,
+                    e.getMessage()
+            );
+            return null;
+        }
    }
-}
+
+    private String unescapeMountField(String value) {
+        return value.replace("\\040", " ")
+                .replace("\\011", "\t")
+                .replace("\\012", "\n")
+                .replace("\\134", "\\");
+    }
+}
@@ -1,14 +1,9 @@

 package com.htopweb.system.linux;

-import java.util.List;
-
 public record LinuxNetworkResponse(
        String name,
        String displayName,
-        String macAddress,
-        List<String> ipv4Addresses,
-        List<String> ipv6Addresses,
        long bytesReceived,
        long bytesSent,
        long packetsReceived,
@@ -1,86 +1,186 @@

 package com.htopweb.system.linux;

-import oshi.SystemInfo;
-import oshi.hardware.NetworkIF;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.stereotype.Service;

-import java.util.Arrays;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.ArrayList;
 import java.util.List;
+import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ConcurrentMap;
+import java.util.stream.Stream;

@Service
 public class LinuxNetworkService {

-    private final SystemInfo _systemInfo;
+    private static final Logger log =
+            LoggerFactory.getLogger(LinuxNetworkService.class);
+
+    private static final Path HOST_ROOT = Path.of("/host/root");
+
+    private static final Path HOST_NET_DEV =
+            HOST_ROOT.resolve("proc/1/net/dev");
+
+    private static final Path HOST_NET_CLASS =
+            HOST_ROOT.resolve("sys/class/net");
+
+    private static final Set<String> EXCLUDED_INTERFACES =
+            Set.of("lo", "docker0");

    private final ConcurrentMap<String, NetworkSnapshot> _previousSnapshots =
            new ConcurrentHashMap<>();

-    public LinuxNetworkService() {
-        _systemInfo = new SystemInfo();
-    }
-
    public List<LinuxNetworkResponse> getInterfaces() {
-        return _systemInfo.getHardware()
-                .getNetworkIFs()
-                .stream()
-                .map(this::toResponse)
-                .toList();
+        if (!Files.isReadable(HOST_NET_DEV)) {
+            log.error("Host network counters unavailable: {}", HOST_NET_DEV);
+            return List.of();
+        }
+
+        try {
+            List<LinuxNetworkResponse> result = new ArrayList<>();
+
+            for (String line : Files.readAllLines(HOST_NET_DEV)) {
+                int separator = line.indexOf(':');
+
+                if (separator < 0) {
+                    continue;
+                }
+
+                String name = line.substring(0, separator).trim();
+
+                if (name.isBlank() || !shouldIncludeInterface(name)) {
+                    continue;
+                }
+
+                String[] values = line.substring(separator + 1)
+                        .trim()
+                        .split("\\s+");
+
+                if (values.length < 16) {
+                    continue;
+                }
+
+                result.add(toResponse(
+                        name,
+                        parseCounter(values[0]),
+                        parseCounter(values[1]),
+                        parseCounter(values[2]),
+                        parseCounter(values[8]),
+                        parseCounter(values[9]),
+                        parseCounter(values[10])
+                ));
+            }
+
+            return result;
+        } catch (IOException | NumberFormatException e) {
+            log.error("Failed to read host network counters: {}",
+                    e.getMessage(), e);
+            return List.of();
+        }
    }

-    private LinuxNetworkResponse toResponse(NetworkIF networkIF) {
-        networkIF.updateAttributes();
+    private boolean shouldIncludeInterface(String name) {
+        if (EXCLUDED_INTERFACES.contains(name)
+                || name.startsWith("veth")
+                || name.startsWith("br-")
+                || name.startsWith("docker")) {
+            return false;
+        }

-        String name = networkIF.getName();
-        long received = Math.max(0L, networkIF.getBytesRecv());
-        long sent = Math.max(0L, networkIF.getBytesSent());
+        Path interfacePath = HOST_NET_CLASS.resolve(name);
+
+        // Physical network interfaces normally expose a "device" symlink.
+        if (Files.exists(interfacePath.resolve("device"))) {
+            return true;
+        }
+
+        // Keep useful virtual interfaces such as WireGuard and tunnels.
+        return Files.exists(interfacePath.resolve("wireless"))
+                || Files.exists(interfacePath.resolve("tun_flags"))
+                || name.startsWith("wg")
+                || name.startsWith("tun")
+                || name.startsWith("tap")
+                || name.startsWith("bond")
+                || name.startsWith("br");
+    }
+
+    private LinuxNetworkResponse toResponse(
+            String name,
+            long received,
+            long packetsReceived,
+            long inboundErrors,
+            long sent,
+            long packetsSent,
+            long outboundErrors
+    ) {
        long now = System.nanoTime();

-        NetworkSnapshot current = new NetworkSnapshot(received, sent, now);
-        NetworkSnapshot previous = _previousSnapshots.put(name, current);
+        NetworkSnapshot current =
+                new NetworkSnapshot(received, sent, now);
+
+        NetworkSnapshot previous =
+                _previousSnapshots.put(name, current);

        double receiveBytesPerSecond = 0.0;
        double sendBytesPerSecond = 0.0;

        if (previous != null && now > previous.timestampNanos()) {
-            double elapsedSeconds =
+            double elapsed =
                    (now - previous.timestampNanos()) / 1_000_000_000.0;

            if (received >= previous.bytesReceived()) {
                receiveBytesPerSecond =
-                        (received - previous.bytesReceived()) / elapsedSeconds;
+                        (received - previous.bytesReceived()) / elapsed;
            }

            if (sent >= previous.bytesSent()) {
                sendBytesPerSecond =
-                        (sent - previous.bytesSent()) / elapsedSeconds;
+                        (sent - previous.bytesSent()) / elapsed;
            }
        }

-        double receiveMbps = receiveBytesPerSecond * 8.0 / 1_000_000.0;
-        double sendMbps = sendBytesPerSecond * 8.0 / 1_000_000.0;
+        Path interfacePath = HOST_NET_CLASS.resolve(name);
+        String alias = readFirstLine(interfacePath.resolve("ifalias"));
+        String displayName = alias.isBlank() ? name : alias;

        return new LinuxNetworkResponse(
                name,
-                networkIF.getDisplayName(),
-                networkIF.getMacaddr(),
-                Arrays.asList(networkIF.getIPv4addr()),
-                Arrays.asList(networkIF.getIPv6addr()),
+                displayName,
                received,
                sent,
-                Math.max(0L, networkIF.getPacketsRecv()),
-                Math.max(0L, networkIF.getPacketsSent()),
-                Math.max(0L, networkIF.getInErrors()),
-                Math.max(0L, networkIF.getOutErrors()),
+                packetsReceived,
+                packetsSent,
+                inboundErrors,
+                outboundErrors,
                roundOne(receiveBytesPerSecond),
                roundOne(sendBytesPerSecond),
-                roundOne(receiveMbps),
-                roundOne(sendMbps)
+                roundOne(receiveBytesPerSecond * 8.0 / 1_000_000.0),
+                roundOne(sendBytesPerSecond * 8.0 / 1_000_000.0)
        );
    }

+    private long parseCounter(String value) {
+        return Math.max(0L, Long.parseLong(value));
+    }
+
+    private String readFirstLine(Path path) {
+        if (!Files.isReadable(path)) {
+            return "";
+        }
+
+        try (Stream<String> lines = Files.lines(path)) {
+            return lines.findFirst().orElse("").trim();
+        } catch (IOException e) {
+            log.debug("Cannot read {}: {}", path, e.getMessage());
+            return "";
+        }
+    }
+
    private double roundOne(double value) {
        return Math.round(value * 10.0) / 10.0;
    }