feat: 初步实现compose template

pkg/systemctl/service.go

@@ -1,11 +1,105 @@
 package systemctl
 
 import (
+	"strconv"
+	"strings"
 	"time"
 
+	"github.com/shirou/gopsutil/v4/process"
+
 	"github.com/acepanel/panel/pkg/shell"
 )
 
+// ServiceInfo 服务详细信息
+type ServiceInfo struct {
+	Status string  // 运行状态 (active, inactive, failed, etc.)
+	PID    int     // 主进程 PID
+	Memory int64   // 内存使用（字节）
+	CPU    float64 // CPU 使用率
+	Uptime string  // 运行时间
+}
+
+// GetServiceInfo 获取服务详细信息
+func GetServiceInfo(name string) (*ServiceInfo, error) {
+	output, err := shell.Execf("systemctl show '%s' --property=ActiveState,MainPID,ExecMainStartTimestamp --no-pager", name)
+	if err != nil {
+		return nil, err
+	}
+
+	info := &ServiceInfo{}
+	for _, line := range strings.Split(output, "\n") {
+		parts := strings.SplitN(line, "=", 2)
+		if len(parts) != 2 {
+			continue
+		}
+		key, value := parts[0], parts[1]
+		switch key {
+		case "ActiveState":
+			info.Status = value
+		case "MainPID":
+			if pid, err := strconv.Atoi(value); err == nil {
+				info.PID = pid
+			}
+		case "ExecMainStartTimestamp":
+			// 格式: Mon 2024-01-01 12:00:00 UTC
+			if value != "" && value != "n/a" {
+				info.Uptime = calcUptime(value)
+			}
+		}
+	}
+
+	// 如果有 PID，使用 gopsutil 获取进程信息
+	if info.PID > 0 {
+		if proc, err := process.NewProcess(int32(info.PID)); err == nil {
+			// 获取内存信息
+			if memInfo, err := proc.MemoryInfo(); err == nil && memInfo != nil {
+				info.Memory = int64(memInfo.RSS)
+			}
+			// 获取 CPU 使用率
+			if cpu, err := proc.CPUPercent(); err == nil {
+				info.CPU = cpu
+			}
+		}
+	}
+
+	return info, nil
+}
+
+// calcUptime 计算运行时间
+func calcUptime(startTime string) string {
+	// 解析时间格式: Mon 2024-01-01 12:00:00 UTC
+	// 或者: Mon 2024-01-01 12:00:00 CST
+	layouts := []string{
+		"Mon 2006-01-02 15:04:05 MST",
+		"Mon 2006-01-02 15:04:05 -0700",
+	}
+
+	var t time.Time
+	var err error
+	for _, layout := range layouts {
+		t, err = time.Parse(layout, startTime)
+		if err == nil {
+			break
+		}
+	}
+	if err != nil {
+		return ""
+	}
+
+	duration := time.Since(t)
+	days := int(duration.Hours() / 24)
+	hours := int(duration.Hours()) % 24
+	minutes := int(duration.Minutes()) % 60
+
+	if days > 0 {
+		return strconv.Itoa(days) + "d " + strconv.Itoa(hours) + "h " + strconv.Itoa(minutes) + "m"
+	}
+	if hours > 0 {
+		return strconv.Itoa(hours) + "h " + strconv.Itoa(minutes) + "m"
+	}
+	return strconv.Itoa(minutes) + "m"
+}
+
 // Status 获取服务状态
 func Status(name string) (bool, error) {
 	output, _ := shell.Execf("systemctl is-active '%s'", name) // 不判断错误，因为 is-active 在服务未启用时会返回 3