代理批量关联租户接口、关于页运行时与资源指标

internal/api/about.go

@@ -1,8 +1,11 @@
 package api
 
 import (
+	"math"
 	"net/http"
+	"os"
 	"runtime"
+	"time"
 
 	"github.com/gin-gonic/gin"
 )
@@ -12,20 +15,67 @@ import (
 var (
 	buildVersion = "dev"
 	buildTime    = ""
+	// startedAt 为进程启动时刻,运行时长与 CPU 均值的计算基准
+	startedAt = time.Now()
+	// aboutDB 由 main 启动时注入,存储指标据此定位数据库文件
+	aboutDB struct{ driver, path string }
 )
 
+// SetAboutRuntime 注入数据库形态,「关于」页存储指标展示用;启动时调用一次。
+func SetAboutRuntime(dbDriver, dbPath string) {
+	aboutDB.driver, aboutDB.path = dbDriver, dbPath
+}
+
 // about 返回构建与运行环境信息,「设置 · 关于」页展示。
 //
-// @Summary  返回构建与运行环境信息,「设置 · 关于」页展示
+// @Summary  返回构建、运行时长与资源占用信息,「设置 · 关于」页展示
 // @Tags     设置
 // @Success  200 {object} map[string]any
 // @Security BearerAuth
 // @Router   /api/v1/about [get]
 func about(c *gin.Context) {
 	c.JSON(http.StatusOK, gin.H{
-		"version":   buildVersion,
-		"buildTime": buildTime,
-		"goVersion": runtime.Version(),
-		"platform":  runtime.GOOS + "/" + runtime.GOARCH,
+		"version":       buildVersion,
+		"buildTime":     buildTime,
+		"goVersion":     runtime.Version(),
+		"platform":      runtime.GOOS + "/" + runtime.GOARCH,
+		"startedAt":     startedAt.UTC().Format(time.RFC3339),
+		"uptimeSeconds": int64(time.Since(startedAt).Seconds()),
+		"resources":     resourcesSnapshot(),
 	})
 }
+
+// resourcesSnapshot 采集进程资源占用:CPU 自启动均值、内存、goroutine 与存储。
+func resourcesSnapshot() gin.H {
+	var ms runtime.MemStats
+	runtime.ReadMemStats(&ms)
+	pct := 0.0
+	if up := time.Since(startedAt).Seconds(); up > 0 {
+		// 多核并行时均值可超 100%,口径为「占单核百分比」
+		pct = processCPUTime().Seconds() / up * 100
+	}
+	return gin.H{
+		"cpuAvgPercent": math.Round(pct*100) / 100,
+		"numCpu":        runtime.NumCPU(),
+		"goroutines":    runtime.NumGoroutine(),
+		"memHeapBytes":  ms.HeapAlloc,
+		"memSysBytes":   ms.Sys,
+		"dbEngine":      aboutDB.driver,
+		"dbBytes":       dbFileBytes(aboutDB.driver, aboutDB.path),
+	}
+}
+
+// dbFileBytes 统计数据库磁盘占用:sqlite 累加主文件与 -wal / -shm,
+// 外部数据库(mysql / postgres)不可从本机度量,返回 -1 表示不可用。
+func dbFileBytes(driver, path string) int64 {
+	if driver != "sqlite" || path == "" {
+		return -1
+	}
+	var total int64
+	for _, p := range []string{path, path + "-wal", path + "-shm"} {
+		if fi, err := os.Stat(p); err == nil {
+			total += fi.Size()
+		}
+	}
+	return total
+}

internal/api/about_other.go

@@ -0,0 +1,8 @@
+//go:build !unix
+
+package api
+
+import "time"
+
+// processCPUTime 非 unix 平台无 getrusage,CPU 均值退化为 0。
+func processCPUTime() time.Duration { return 0 }

internal/api/about_test.go

@@ -0,0 +1,57 @@
+package api
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestDBFileBytes(t *testing.T) {
+	dir := t.TempDir()
+	dbPath := filepath.Join(dir, "app.db")
+	mustWrite := func(p string, n int) {
+		t.Helper()
+		if err := os.WriteFile(p, make([]byte, n), 0o600); err != nil {
+			t.Fatalf("write %s: %v", p, err)
+		}
+	}
+	mustWrite(dbPath, 100)
+	mustWrite(dbPath+"-wal", 30)
+
+	cases := []struct {
+		name   string
+		driver string
+		path   string
+		want   int64
+	}{
+		{name: "sqlite 主文件加 wal", driver: "sqlite", path: dbPath, want: 130},
+		{name: "sqlite 文件不存在计 0", driver: "sqlite", path: filepath.Join(dir, "none.db"), want: 0},
+		{name: "外部数据库不可度量", driver: "postgres", path: "", want: -1},
+		{name: "路径为空不可度量", driver: "sqlite", path: "", want: -1},
+	}
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			if got := dbFileBytes(tc.driver, tc.path); got != tc.want {
+				t.Fatalf("dbFileBytes(%q, %q) = %d, want %d", tc.driver, tc.path, got, tc.want)
+			}
+		})
+	}
+}
+
+func TestResourcesSnapshot(t *testing.T) {
+	SetAboutRuntime("sqlite", filepath.Join(t.TempDir(), "absent.db"))
+	got := resourcesSnapshot()
+
+	if got["numCpu"].(int) < 1 || got["goroutines"].(int) < 1 {
+		t.Fatalf("numCpu / goroutines 应为正数: %+v", got)
+	}
+	if got["memHeapBytes"].(uint64) == 0 || got["memSysBytes"].(uint64) == 0 {
+		t.Fatalf("内存指标应为正数: %+v", got)
+	}
+	if got["cpuAvgPercent"].(float64) < 0 {
+		t.Fatalf("cpuAvgPercent 不应为负: %+v", got)
+	}
+	if got["dbEngine"].(string) != "sqlite" || got["dbBytes"].(int64) != 0 {
+		t.Fatalf("存储指标不符: %+v", got)
+	}
+}

internal/api/about_unix.go

@@ -0,0 +1,18 @@
+//go:build unix
+
+package api
+
+import (
+	"syscall"
+	"time"
+)
+
+// processCPUTime 返回进程自启动累计的 CPU 时间(用户态 + 内核态);
+// 取不到时返回 0,「关于」页 CPU 均值显示为 0 而非报错。
+func processCPUTime() time.Duration {
+	var ru syscall.Rusage
+	if err := syscall.Getrusage(syscall.RUSAGE_SELF, &ru); err != nil {
+		return 0
+	}
+	return time.Duration(ru.Utime.Nano() + ru.Stime.Nano())
+}

internal/api/proxy.go

@@ -144,6 +144,35 @@ func (h *proxyHandler) probe(c *gin.Context) {
 	c.JSON(http.StatusOK, view)
 }
 
+// setTenants 设置代理关联的租户全集(代理侧批量关联 / 解除)。
+//
+// @Summary  设置代理关联的租户全集
+// @Tags     设置
+// @Param    id path int true "代理 ID"
+// @Param    body body object true "请求体 {\"ociConfigIds\": [1,2]}"
+// @Success  200 {object} map[string]any "usedBy"
+// @Security BearerAuth
+// @Router   /api/v1/proxies/{id}/tenants [put]
+func (h *proxyHandler) setTenants(c *gin.Context) {
+	id, ok := pathID(c)
+	if !ok {
+		return
+	}
+	var req struct {
+		OciConfigIDs []uint `json:"ociConfigIds"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+	used, err := h.svc.SetTenants(c.Request.Context(), id, req.OciConfigIDs)
+	if err != nil {
+		h.respond(c, err)
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"usedBy": used})
+}
+
 // respond 把代理业务错误映射到语义状态码。
 func (h *proxyHandler) respond(c *gin.Context, err error) {
 	switch {

internal/api/routes_settings.go

@@ -35,4 +35,5 @@ func registerSettings(secured *gin.RouterGroup, settings *service.SettingService
 	secured.PUT("/proxies/:id", px.update)
 	secured.DELETE("/proxies/:id", px.remove)
 	secured.POST("/proxies/:id/probe", px.probe)
+	secured.PUT("/proxies/:id/tenants", px.setTenants)
 }