mirror of
https://github.com/fankes/komari-agent.git
synced 2025-10-19 02:59:23 +08:00
352 lines
9.9 KiB
Go
352 lines
9.9 KiB
Go
package monitoring
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import (
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"encoding/json"
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"fmt"
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"os/exec"
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"strings"
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"time"
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"github.com/komari-monitor/komari-agent/cmd/flags"
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"github.com/shirou/gopsutil/v4/net"
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)
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func ConnectionsCount() (tcpCount, udpCount int, err error) {
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tcps, err := net.Connections("tcp")
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if err != nil {
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return 0, 0, fmt.Errorf("failed to get TCP connections: %w", err)
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}
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udps, err := net.Connections("udp")
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if err != nil {
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return 0, 0, fmt.Errorf("failed to get UDP connections: %w", err)
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}
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return len(tcps), len(udps), nil
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}
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var (
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// 预定义常见的回环和虚拟接口名称
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loopbackNames = map[string]struct{}{
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"br": {},
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"cni": {},
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"docker": {},
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"podman": {},
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"flannel": {},
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"lo": {},
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"veth": {}, // Docker
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"virbr": {}, // KVM
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"vmbr": {}, // Proxmox
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}
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)
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// VnstatInterface represents a network interface in vnstat output
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type VnstatInterface struct {
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Name string `json:"name"`
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Alias string `json:"alias"`
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Created VnstatDate `json:"created"`
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Updated VnstatUpdated `json:"updated"`
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Traffic VnstatTraffic `json:"traffic"`
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}
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// VnstatDate represents date information
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type VnstatDate struct {
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Date VnstatDateInfo `json:"date"`
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Timestamp int64 `json:"timestamp"`
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}
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// VnstatUpdated represents updated information
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type VnstatUpdated struct {
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Date VnstatDateInfo `json:"date"`
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Time VnstatTimeInfo `json:"time"`
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Timestamp int64 `json:"timestamp"`
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}
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// VnstatDateInfo represents date components
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type VnstatDateInfo struct {
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Year int `json:"year"`
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Month int `json:"month"`
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Day int `json:"day"`
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}
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// VnstatTimeInfo represents time components
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type VnstatTimeInfo struct {
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Hour int `json:"hour"`
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Minute int `json:"minute"`
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}
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// VnstatTraffic represents traffic data from vnstat
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type VnstatTraffic struct {
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Total VnstatTotal `json:"total"`
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FiveMinute []VnstatTimeEntry `json:"fiveminute"`
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Hour []VnstatTimeEntry `json:"hour"`
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Day []VnstatTimeEntry `json:"day"`
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Month []VnstatMonthEntry `json:"month"`
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Year []VnstatYearEntry `json:"year"`
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Top []VnstatTimeEntry `json:"top"`
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}
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// VnstatTotal represents total traffic data
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type VnstatTotal struct {
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Rx uint64 `json:"rx"`
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Tx uint64 `json:"tx"`
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}
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// VnstatTimeEntry represents a time-based traffic entry
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type VnstatTimeEntry struct {
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ID int `json:"id"`
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Date VnstatDateInfo `json:"date"`
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Time VnstatTimeInfo `json:"time,omitempty"`
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Timestamp int64 `json:"timestamp"`
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Rx uint64 `json:"rx"`
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Tx uint64 `json:"tx"`
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}
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// VnstatMonthEntry represents a monthly traffic entry
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type VnstatMonthEntry struct {
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ID int `json:"id"`
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Date VnstatDateInfo `json:"date"`
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Timestamp int64 `json:"timestamp"`
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Rx uint64 `json:"rx"`
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Tx uint64 `json:"tx"`
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}
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// VnstatYearEntry represents a yearly traffic entry
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type VnstatYearEntry struct {
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ID int `json:"id"`
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Date VnstatDateInfo `json:"date"`
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Timestamp int64 `json:"timestamp"`
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Rx uint64 `json:"rx"`
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Tx uint64 `json:"tx"`
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}
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// VnstatOutput represents the complete vnstat JSON output
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type VnstatOutput struct {
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VnstatVersion string `json:"vnstatversion"`
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JsonVersion string `json:"jsonversion"`
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Interfaces []VnstatInterface `json:"interfaces"`
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}
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func getVnstatData() (map[string]VnstatInterface, error) {
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cmd := exec.Command("vnstat", "--json")
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output, err := cmd.Output()
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if err != nil {
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return nil, fmt.Errorf("failed to run vnstat: %w", err)
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}
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var vnstatOutput VnstatOutput
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if err := json.Unmarshal(output, &vnstatOutput); err != nil {
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return nil, fmt.Errorf("failed to parse vnstat output: %w", err)
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}
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interfaceMap := make(map[string]VnstatInterface)
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for _, iface := range vnstatOutput.Interfaces {
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interfaceMap[iface.Name] = iface
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}
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return interfaceMap, nil
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}
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// calculateMonthlyUsage 计算从月重置日到当前日期的流量使用量
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func calculateMonthlyUsage(iface VnstatInterface, monthRotateDay int) (rx, tx uint64) {
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now := time.Now()
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currentYear := now.Year()
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currentMonth := int(now.Month())
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currentDay := now.Day()
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// 确定统计的起始日期
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var startYear, startMonth, startDay int
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if currentDay >= monthRotateDay {
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// 当前月的重置日已过，从当前月的重置日开始计算
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startYear = currentYear
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startMonth = currentMonth
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startDay = monthRotateDay
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} else {
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// 当前月的重置日未到，从上个月的重置日开始计算
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if currentMonth == 1 {
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startYear = currentYear - 1
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startMonth = 12
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} else {
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startYear = currentYear
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startMonth = currentMonth - 1
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}
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startDay = monthRotateDay
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}
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startTime := time.Date(startYear, time.Month(startMonth), startDay, 0, 0, 0, 0, time.Local)
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// 统计从起始时间到现在的流量
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for _, entry := range iface.Traffic.Day {
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entryTime := time.Date(entry.Date.Year, time.Month(entry.Date.Month), entry.Date.Day, 0, 0, 0, 0, time.Local)
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if entryTime.After(startTime) || entryTime.Equal(startTime) {
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rx += entry.Rx
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tx += entry.Tx
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}
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}
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return rx, tx
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}
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// setVnstatMonthRotate 设置vnstat的月重置日期
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func setVnstatMonthRotate(day int) error {
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if day < 1 || day > 31 {
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return fmt.Errorf("invalid day: %d, must be between 1 and 31", day)
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}
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cmd := exec.Command("vnstat", "--config", fmt.Sprintf("MonthRotate %d", day))
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if err := cmd.Run(); err != nil {
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return fmt.Errorf("failed to set vnstat month rotate to day %d: %w", day, err)
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}
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return nil
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}
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func NetworkSpeed() (totalUp, totalDown, upSpeed, downSpeed uint64, err error) {
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includeNics := parseNics(flags.IncludeNics)
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excludeNics := parseNics(flags.ExcludeNics)
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// 如果设置了月重置（非0），使用vnstat统计totalUp、totalDown
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if flags.MonthRotate != 0 {
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vnstatData, err := getVnstatData()
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if err != nil {
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// 如果vnstat失败，回退到原来的方法，并返回额外的错误信息
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fallbackUp, fallbackDown, fallbackUpSpeed, fallbackDownSpeed, fallbackErr := getNetworkSpeedFallback(includeNics, excludeNics)
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if fallbackErr != nil {
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return fallbackUp, fallbackDown, fallbackUpSpeed, fallbackDownSpeed, fmt.Errorf("failed to call vnstat: %v; fallback error: %w", err, fallbackErr)
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}
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return fallbackUp, fallbackDown, fallbackUpSpeed, fallbackDownSpeed, fmt.Errorf("failed to call vnstat: %w", err)
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}
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// 使用vnstat数据计算当月（到重置日）的流量使用量
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for interfaceName, interfaceData := range vnstatData {
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if shouldInclude(interfaceName, includeNics, excludeNics) {
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monthlyRx, monthlyTx := calculateMonthlyUsage(interfaceData, flags.MonthRotate)
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totalUp += monthlyTx
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totalDown += monthlyRx
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}
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}
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// 对于实时速度，仍然使用gopsutil方法
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_, _, upSpeed, downSpeed, err = getNetworkSpeedFallback(includeNics, excludeNics)
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if err != nil {
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return totalUp, totalDown, 0, 0, err
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}
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return totalUp, totalDown, upSpeed, downSpeed, nil
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}
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// 如果没有设置月重置，使用原来的方法
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return getNetworkSpeedFallback(includeNics, excludeNics)
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}
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func getNetworkSpeedFallback(includeNics, excludeNics map[string]struct{}) (totalUp, totalDown, upSpeed, downSpeed uint64, err error) {
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// 获取第一次网络IO计数器
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ioCounters1, err := net.IOCounters(true)
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if err != nil {
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return 0, 0, 0, 0, fmt.Errorf("failed to get network IO counters: %w", err)
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}
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if len(ioCounters1) == 0 {
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return 0, 0, 0, 0, fmt.Errorf("no network interfaces found")
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}
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// 统计第一次所有非回环接口的流量
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var totalUp1, totalDown1 uint64
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for _, interfaceStats := range ioCounters1 {
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if shouldInclude(interfaceStats.Name, includeNics, excludeNics) {
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totalUp1 += interfaceStats.BytesSent
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totalDown1 += interfaceStats.BytesRecv
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}
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}
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// 等待1秒
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time.Sleep(time.Second)
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// 获取第二次网络IO计数器
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ioCounters2, err := net.IOCounters(true)
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if err != nil {
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return 0, 0, 0, 0, fmt.Errorf("failed to get network IO counters: %w", err)
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}
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if len(ioCounters2) == 0 {
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return 0, 0, 0, 0, fmt.Errorf("no network interfaces found")
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}
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// 统计第二次所有非回环接口的流量
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var totalUp2, totalDown2 uint64
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for _, interfaceStats := range ioCounters2 {
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if shouldInclude(interfaceStats.Name, includeNics, excludeNics) {
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totalUp2 += interfaceStats.BytesSent
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totalDown2 += interfaceStats.BytesRecv
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}
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}
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// 计算速度 (每秒的速率)
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upSpeed = totalUp2 - totalUp1
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downSpeed = totalDown2 - totalDown1
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return totalUp2, totalDown2, upSpeed, downSpeed, nil
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}
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func parseNics(nics string) map[string]struct{} {
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if nics == "" {
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return nil
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}
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nicSet := make(map[string]struct{})
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for _, nic := range strings.Split(nics, ",") {
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nicSet[strings.TrimSpace(nic)] = struct{}{}
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}
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return nicSet
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}
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func shouldInclude(nicName string, includeNics, excludeNics map[string]struct{}) bool {
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// 默认排除回环接口
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for loopbackName := range loopbackNames {
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if strings.HasPrefix(nicName, loopbackName) {
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return false
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}
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}
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// 如果定义了白名单，则只包括白名单中的接口
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if len(includeNics) > 0 {
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_, ok := includeNics[nicName]
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return ok
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}
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// 如果定义了黑名单，则排除黑名单中的接口
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if len(excludeNics) > 0 {
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if _, ok := excludeNics[nicName]; ok {
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return false
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}
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}
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return true
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}
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func InterfaceList() ([]string, error) {
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includeNics := parseNics(flags.IncludeNics)
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excludeNics := parseNics(flags.ExcludeNics)
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interfaces := []string{}
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if flags.MonthRotate != 0 {
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vnstatData, err := getVnstatData()
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if err == nil {
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for interfaceName := range vnstatData {
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if shouldInclude(interfaceName, includeNics, excludeNics) {
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interfaces = append(interfaces, interfaceName)
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}
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}
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return interfaces, nil
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}
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}
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ioCounters, err := net.IOCounters(true)
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if err != nil {
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return nil, err
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}
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for _, interfaceStats := range ioCounters {
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if shouldInclude(interfaceStats.Name, includeNics, excludeNics) {
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interfaces = append(interfaces, interfaceStats.Name)
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}
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}
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return interfaces, nil
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}
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