slice 9: host-health view on the monitoring page (v0.39.0)

Add agentapi HostMetrics() + a thin /api/host-metrics proxy to the agent's new GET /host/metrics, and a 'Szerver allapota (gazdagep)' card on the monitoring page rendering host CPU%/load/mem/CPU-temp(n/a)/uptime + per- storage capacity bars (thin-pool fill, disk temp/wear). Polls every 8s. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-10 16:16:15 +02:00
parent 4c9065381b
commit d8d1e17758
8 changed files with 406 additions and 35 deletions
@@ -0,0 +1,84 @@
+package agentapi
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+)
+
+// hostMetricsStub serves a GET /host/metrics payload with a populated host block (CPU temp set)
+// and one storage target carrying a thin-pool + SMART temp.
+func hostMetricsStub(cpuTempNull bool) (*httptest.Server, string) {
+	temp := `47`
+	if cpuTempNull {
+		temp = `null`
+	}
+	mux := http.NewServeMux()
+	mux.HandleFunc("GET /host/metrics", func(w http.ResponseWriter, r *http.Request) {
+		_, _ = w.Write([]byte(`{"ok":true,"data":{
+			"vmid":8200,
+			"host":{"node":"demo-felhom","cpu_percent":12.5,"memory_total_bytes":17179869184,
+				"memory_used_bytes":4294967296,"memory_percent":25,"loadavg":["0.10","0.20","0.15"],
+				"uptime_seconds":86400,"cpu_temp_c":` + temp + `},
+			"storage_targets":[
+				{"name":"local-lvm","type":"lvmthin","state":"attached","reachable":true,
+					"total_bytes":100000000000,"used_bytes":42000000000,"used_fraction":0.42,
+					"thin_pool":{"data_used_fraction":0.42,"metadata_used_fraction":null},
+					"smart":{"health":"PASSED","temperature_c":38,"percentage_used":2}},
+				{"name":"usb-backup","type":"usb","state":"attached","reachable":true,
+					"total_bytes":2000000000000,"used_bytes":500000000000,"used_fraction":0.25,
+					"smart":{"health":"PASSED","temperature_c":null,"percentage_used":null}}
+			]}}`))
+	})
+	s := httptest.NewTLSServer(mux)
+	return s, strings.TrimPrefix(s.URL, "https://")
+}
+
+func TestHostMetrics_DecodesHostAndStorage(t *testing.T) {
+	s, ep := hostMetricsStub(false)
+	defer s.Close()
+	c := clientFor(t, s, ep)
+	resp, err := c.HostMetrics(context.Background())
+	if err != nil {
+		t.Fatal(err)
+	}
+	if resp.Host.Node != "demo-felhom" || resp.Host.CPUPercent != 12.5 {
+		t.Fatalf("host = %+v", resp.Host)
+	}
+	if resp.Host.CPUTempC == nil || *resp.Host.CPUTempC != 47 {
+		t.Fatalf("cpu_temp_c = %v, want 47", resp.Host.CPUTempC)
+	}
+	if len(resp.StorageTargets) != 2 {
+		t.Fatalf("storage targets = %d, want 2", len(resp.StorageTargets))
+	}
+	lvm := resp.StorageTargets[0]
+	if lvm.ThinPool == nil || lvm.ThinPool.DataUsedFraction != 0.42 {
+		t.Errorf("thin_pool = %+v", lvm.ThinPool)
+	}
+	if lvm.Smart.TemperatureC == nil || *lvm.Smart.TemperatureC != 38 {
+		t.Errorf("smart temp = %v, want 38", lvm.Smart.TemperatureC)
+	}
+	if lvm.Smart.PercentageUsed == nil || *lvm.Smart.PercentageUsed != 2 {
+		t.Errorf("smart wear = %v, want 2", lvm.Smart.PercentageUsed)
+	}
+	// USB drive: SMART temp/wear are null (USB bridge exposes no SMART) → graceful null.
+	if resp.StorageTargets[1].Smart.TemperatureC != nil {
+		t.Errorf("usb smart temp = %v, want nil", resp.StorageTargets[1].Smart.TemperatureC)
+	}
+}
+
+// A null cpu_temp_c decodes to a nil pointer (the UI renders "n/a").
+func TestHostMetrics_NullCPUTemp(t *testing.T) {
+	s, ep := hostMetricsStub(true)
+	defer s.Close()
+	c := clientFor(t, s, ep)
+	resp, err := c.HostMetrics(context.Background())
+	if err != nil {
+		t.Fatal(err)
+	}
+	if resp.Host.CPUTempC != nil {
+		t.Fatalf("cpu_temp_c = %v, want nil (n/a)", resp.Host.CPUTempC)
+	}
+}