attacker
ac0b8e75c0
- Go agent: CPU/mem/disk/port collectors, HTTP report, static binary - Cross-compile: linux/amd64 + linux/arm64 (statically linked) - One-line install script for all Linux distros - Backend: POST /api/v1/agent/report (no JWT) + GET /agent/latest,history (JWT) - CloudBilling.tsx: fixed syntax errors, stats/trends/records/alerts - K8s menu renamed to Kubernetes管理 Signed-off-by: Logan.Li
96 lines
2.2 KiB
Go
96 lines
2.2 KiB
Go
// Package collector 提供服务器各项系统指标的采集能力。
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// 本文件实现内存使用率采集，通过解析 Linux /proc/meminfo 获取。
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//
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// 署名 Logan.Li
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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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"ezops/agent/model"
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)
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// kbToGB 将 KB 转换为 GB 的换算系数
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const kbToGB = 1.0 / (1024.0 * 1024.0)
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// MemCollector 内存指标采集器，通过解析 /proc/meminfo 获取
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type MemCollector struct{}
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// NewMemCollector 创建内存采集器实例
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func NewMemCollector() *MemCollector {
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return &MemCollector{}
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}
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// Collect 采集当前内存指标
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func (m *MemCollector) Collect() (model.MemoryStat, error) {
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values, err := parseMemInfo()
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if err != nil {
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return model.MemoryStat{}, fmt.Errorf("读取内存信息失败: %w", err)
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}
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totalKB := values["MemTotal"]
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buffersKB := values["Buffers"]
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cachedKB := values["Cached"]
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availableKB := values["MemAvailable"]
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freeKB := values["MemFree"]
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// 若内核未提供 MemAvailable（较老版本），则按传统方式估算可用内存
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if availableKB == 0 {
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availableKB = freeKB + buffersKB + cachedKB
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}
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usedKB := uint64(0)
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if totalKB > availableKB {
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usedKB = totalKB - availableKB
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}
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stat := model.MemoryStat{
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TotalGB: float64(totalKB) * kbToGB,
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UsedGB: float64(usedKB) * kbToGB,
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CachedGB: float64(buffersKB+cachedKB) * kbToGB,
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}
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if totalKB > 0 {
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stat.UsagePercent = float64(usedKB) / float64(totalKB) * 100.0
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}
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return stat, nil
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}
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// parseMemInfo 解析 /proc/meminfo，返回 字段名 -> 数值(KB) 的映射
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func parseMemInfo() (map[string]uint64, error) {
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result := make(map[string]uint64)
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f, err := os.Open("/proc/meminfo")
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if err != nil {
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return nil, 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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// 形如: MemTotal: 16384000 kB
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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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key := strings.TrimSpace(parts[0])
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valFields := strings.Fields(parts[1])
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if len(valFields) == 0 {
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continue
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}
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val, err := strconv.ParseUint(valFields[0], 10, 64)
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if err != nil {
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continue
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}
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result[key] = val
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}
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if err := scanner.Err(); err != nil {
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return nil, err
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}
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return result, nil
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}
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