feat: 重构监控中心导航，新增资源监控4大模块
- 主菜单「监控告警」→「监控中心」 - 「告警中心」→「告警服务」移至链路追踪下方 - 新增资源监控 Tab 页（主机/中间件/SNMP/站点拨测） - Agent 新增网络采集器(network)和磁盘IO采集器(diskio) - 后端扩展 Agent 上报模型，支持 NetworkStat/DiskIOStat - 前端 ServerTableRow 展示网络和磁盘IO实时指标 - WebSocket MetricsUpdate 推送扩展
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// Package collector — 磁盘 IO 指标采集器
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// 通过读取 /proc/diskstats 获取磁盘读写 BPS 和 IOPS。
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//
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// 署名 Hermes
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package collector
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import (
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"bufio"
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"fmt"
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"os"
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"strconv"
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"strings"
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"sync"
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"time"
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"ezops/agent/model"
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)
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// diskIOSample 保存上一次采样，用于计算速率
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type diskIOSample struct {
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time time.Time
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readSects uint64
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writeSects uint64
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readOps uint64
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writeOps uint64
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}
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// DiskIOCollector 磁盘 IO 采集器
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type DiskIOCollector struct {
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mu sync.Mutex
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prev *diskIOSample
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}
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// NewDiskIOCollector 创建磁盘 IO 采集器
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func NewDiskIOCollector() *DiskIOCollector {
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return &DiskIOCollector{}
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}
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// Collect 采集磁盘 IO 指标
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func (c *DiskIOCollector) Collect() (model.DiskIOStat, error) {
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stat := model.DiskIOStat{}
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rSects, wSects, rOps, wOps, err := readDiskStats()
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if err != nil {
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return stat, fmt.Errorf("读取磁盘 IO 失败: %w", err)
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}
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c.mu.Lock()
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defer c.mu.Unlock()
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now := time.Now()
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cur := &diskIOSample{
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time: now,
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readSects: rSects,
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writeSects: wSects,
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readOps: rOps,
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writeOps: wOps,
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}
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if c.prev != nil && now.After(c.prev.time) {
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elapsed := now.Sub(c.prev.time).Seconds()
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if elapsed > 0 {
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sectorSize := uint64(512) // 标准扇区 512 bytes
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stat.ReadBPS = float64((cur.readSects-c.prev.readSects)*sectorSize) / elapsed
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stat.WriteBPS = float64((cur.writeSects-c.prev.writeSects)*sectorSize) / elapsed
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stat.ReadIOPS = float64(cur.readOps-c.prev.readOps) / elapsed
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stat.WriteIOPS = float64(cur.writeOps-c.prev.writeOps) / elapsed
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}
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}
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c.prev = cur
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return stat, nil
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}
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// readDiskStats 读取 /proc/diskstats，汇总所有物理磁盘的读写数据
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// fields[2]=设备名, fields[3]=读完成次数, fields[5]=读扇区数, fields[7]=写完成次数, fields[9]=写扇区数
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func readDiskStats() (rSects, wSects, rOps, wOps uint64, err error) {
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f, err := os.Open("/proc/diskstats")
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if err != nil {
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return 0, 0, 0, 0, err
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}
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defer f.Close()
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scanner := bufio.NewScanner(f)
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for scanner.Scan() {
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line := scanner.Text()
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fields := strings.Fields(line)
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if len(fields) < 14 {
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continue
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}
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dev := fields[2]
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// 只采集物理磁盘 (sdX, nvmeXn1, vdX)，跳过分区和 loop 设备
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if strings.HasPrefix(dev, "loop") ||
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(strings.HasPrefix(dev, "sd") && len(dev) > 3) || // sda1, sda2 等分区
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(strings.HasPrefix(dev, "nvme") && strings.Contains(dev, "p")) || // nvme0n1p1
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(strings.HasPrefix(dev, "ram")) ||
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strings.HasPrefix(dev, "dm-") {
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continue
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}
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// field 3 = 读完成次数 (rd_ios)
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// field 5 = 读扇区数 (rd_sectors)
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// field 7 = 写完成次数 (wr_ios)
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// field 9 = 写扇区数 (wr_sectors)
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if v, e := strconv.ParseUint(fields[3], 10, 64); e == nil {
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rOps += v
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}
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if v, e := strconv.ParseUint(fields[5], 10, 64); e == nil {
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rSects += v
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}
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if v, e := strconv.ParseUint(fields[7], 10, 64); e == nil {
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wOps += v
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}
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if v, e := strconv.ParseUint(fields[9], 10, 64); e == nil {
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wSects += v
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}
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}
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return rSects, wSects, rOps, wOps, scanner.Err()
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}
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@@ -0,0 +1,171 @@
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// Package collector 提供服务器各项系统指标的采集能力。
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// 本文件实现网络连接数、网卡流量等网络指标采集。
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//
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// 署名 Hermes (extended from Logan.Li pattern)
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package collector
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import (
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"bufio"
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"fmt"
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"os"
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"strconv"
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"strings"
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"sync"
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"time"
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"ezops/agent/model"
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)
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// netSample 保存上一次的网络采样数据，用于计算速率
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type netSample struct {
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time time.Time
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rxBytes uint64
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txBytes uint64
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}
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// NetworkCollector 网络指标采集器
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type NetworkCollector struct {
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mu sync.Mutex
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prev *netSample
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}
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// NewNetworkCollector 创建网络采集器
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func NewNetworkCollector() *NetworkCollector {
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return &NetworkCollector{}
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}
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// Collect 采集网络指标（并发连接数、TIME_WAIT、网卡 rx/tx B/s）
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func (c *NetworkCollector) Collect() (model.NetworkStat, error) {
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stat := model.NetworkStat{}
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// 1. 采集 TCP 连接统计
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if tcpStat, err := readSockStat(); err == nil {
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stat.TCPEstablished = tcpStat.established
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stat.TCPTimeWait = tcpStat.timeWait
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stat.TCPTotal = tcpStat.total
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}
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// 2. 采集网卡流量（取所有非 lo 网卡合计）
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curRx, curTx, nicName, err := readNetDevTotal()
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if err != nil {
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return stat, fmt.Errorf("读取网卡流量失败: %w", err)
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}
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stat.NicName = nicName
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c.mu.Lock()
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defer c.mu.Unlock()
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now := time.Now()
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cur := &netSample{time: now, rxBytes: curRx, txBytes: curTx}
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if c.prev != nil && now.After(c.prev.time) {
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elapsed := now.Sub(c.prev.time).Seconds()
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if elapsed > 0 && cur.rxBytes >= c.prev.rxBytes && cur.txBytes >= c.prev.txBytes {
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stat.NetRxBPS = float64(cur.rxBytes-c.prev.rxBytes) / elapsed
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stat.NetTxBPS = float64(cur.txBytes-c.prev.txBytes) / elapsed
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}
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}
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c.prev = cur
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return stat, nil
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}
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// tcpSockStat 解析 /proc/net/sockstat 或 /proc/net/tcp 的结果
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type tcpSockStat struct {
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established int
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timeWait int
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total int
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}
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// readSockStat 从 /proc/net/sockstat 读取 TCP 连接统计
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func readSockStat() (tcpSockStat, error) {
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var result tcpSockStat
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f, err := os.Open("/proc/net/sockstat")
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if err != nil {
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// Fallback: try /proc/net/sockstat6
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return result, err
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}
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defer f.Close()
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scanner := bufio.NewScanner(f)
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for scanner.Scan() {
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line := scanner.Text()
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if !strings.HasPrefix(line, "TCP:") {
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continue
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}
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// 格式: "TCP: inuse 123 orphan 0 tw 45 alloc 200 mem 30"
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fields := strings.Fields(line)
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for i, f := range fields {
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switch f {
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case "inuse":
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if i+1 < len(fields) {
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result.established, _ = strconv.Atoi(fields[i+1])
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}
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case "tw":
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if i+1 < len(fields) {
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result.timeWait, _ = strconv.Atoi(fields[i+1])
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}
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case "alloc":
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if i+1 < len(fields) {
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result.total, _ = strconv.Atoi(fields[i+1])
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}
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}
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}
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result.total = result.established // total = established count (inuse)
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break
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}
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return result, scanner.Err()
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}
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// readNetDevTotal 读取 /proc/net/dev，取第一个非 lo 且活跃的物理网卡总流量
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func readNetDevTotal() (rxBytes, txBytes uint64, nicName string, err error) {
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f, err := os.Open("/proc/net/dev")
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if err != nil {
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return 0, 0, "", err
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}
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defer f.Close()
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scanner := bufio.NewScanner(f)
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// Skip header lines (first 2 lines)
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lineNum := 0
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for scanner.Scan() {
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lineNum++
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if lineNum <= 2 {
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continue
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}
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line := strings.TrimSpace(scanner.Text())
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parts := strings.SplitN(line, ":", 2)
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if len(parts) != 2 {
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continue
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}
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name := strings.TrimSpace(parts[0])
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// Skip loopback and virtual interfaces
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if name == "lo" || strings.HasPrefix(name, "veth") || strings.HasPrefix(name, "docker") ||
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strings.HasPrefix(name, "br-") || strings.HasPrefix(name, "virbr") {
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continue
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}
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fields := strings.Fields(parts[1])
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if len(fields) < 10 {
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continue
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}
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// fields[0]=rx_bytes, fields[8]=tx_bytes
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rb, _ := strconv.ParseUint(fields[0], 10, 64)
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tb, _ := strconv.ParseUint(fields[8], 10, 64)
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if rb > 0 || tb > 0 {
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nicName = name
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rxBytes += rb
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txBytes += tb
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}
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}
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if nicName == "" {
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return 0, 0, "eth0", nil
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}
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return rxBytes, txBytes, nicName, scanner.Err()
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}
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