README.fr.md

@@ -261,7 +261,11 @@ couleur, est mémorisé par navigateur.
     européen de polices respectueux de la vie privée ; sans accès à internet, la police du
     système est utilisée. Les ligatures sont désactivées pour que `->` ou `!=` s'affichent tels
     quels. Le réglage le plus dense est Très petite + Compacte + Inconsolata Condensed.
-- **Données** : « Supprimer tous les logs » efface définitivement tous les logs stockés (il faut
+- **Données** : chiffres de la base lus dans VictoriaLogs (actualisés au plus toutes les 30 s) :
+  lignes stockées, taille sur disque (index compris), taille brute et taux de compression,
+  période couverte avec la rétention, lignes des dernières 24 h et de la dernière heure, hôtes
+  et applications distincts, espace disque libre. Les tailles sont en Ko/Mo/Go (KB/MB/GB en
+  anglais). « Supprimer tous les logs » efface définitivement tous les logs stockés (il faut
   taper `PURGE` pour confirmer). Les tags et les paramètres sont conservés. VictoriaLogs doit
   être lancé avec `-delete.enable` (déjà présent dans `docker-compose.yml`). La fonction est
   désactivée par défaut : mettez `ALLOW_PURGE=true` pour l'autoriser. Tout administrateur peut

README.md

@@ -237,7 +237,10 @@ remembered per browser.
     [Bunny Fonts](https://fonts.bunny.net), a privacy-friendly European font service; without
     internet access, the system font is used. Ligatures are disabled so `->` or `!=` show as
     typed. The densest setting is Tiny + Compact + Inconsolata Condensed.
-- **Data**: "Delete all logs" permanently erases every stored log (you must type
+- **Data**: database figures read from VictoriaLogs (refreshed at most every 30 s): stored
+  lines, size on disk (index included), raw size and compression ratio, period covered with
+  the retention, lines of the last 24 h and last hour, distinct hosts and apps, free disk
+  space. Sizes use KB/MB/GB (Ko/Mo/Go in French). "Delete all logs" permanently erases every stored log (you must type
   `PURGE` to confirm). Tags and settings are kept. VictoriaLogs needs `-delete.enable`
   (already set in `docker-compose.yml`). The feature is off by default: set `ALLOW_PURGE=true`
   to allow it. Any admin can then purge: turn on [authentication](#authentication) if the UI

api.go

@@ -23,6 +23,7 @@ type API struct {
 	docker     *DockerManager // nil when DOCKER_LOGS is off
 	syslog     *SyslogServer
 	host       *HostLogs
+	dbstats    dbStatsCache
 }
 
 func (a *API) Routes(mux *http.ServeMux) {
@@ -32,6 +33,7 @@ func (a *API) Routes(mux *http.ServeMux) {
 	mux.HandleFunc("GET /api/facets", a.facets)
 	mux.HandleFunc("GET /api/stream", a.stream)
 	mux.HandleFunc("GET /api/stats", a.stats)
+	mux.HandleFunc("GET /api/dbstats", a.dbStats)
 	mux.HandleFunc("GET /api/tags", a.listTags)
 	mux.HandleFunc("POST /api/tags", a.createTag)
 	mux.HandleFunc("POST /api/tags/reset", a.resetTags)
@@ -314,6 +316,17 @@ func (a *API) stats(w http.ResponseWriter, r *http.Request) {
 	writeJSON(w, http.StatusOK, s)
 }
 
+// GET /api/dbstats[?refresh=1]: size and content of the VictoriaLogs base
+// (Settings > Data), cached for 30 s.
+func (a *API) dbStats(w http.ResponseWriter, r *http.Request) {
+	st, err := a.dbstats.get(r.Context(), a.store, r.URL.Query().Get("refresh") == "1")
+	if err != nil {
+		writeErr(w, http.StatusBadGateway, err)
+		return
+	}
+	writeJSON(w, http.StatusOK, st)
+}
+
 func (a *API) listTags(w http.ResponseWriter, r *http.Request) {
 	writeJSON(w, http.StatusOK, a.tags.List())
 }

dbstats.go

@@ -0,0 +1,167 @@
+package main
+
+import (
+	"bufio"
+	"context"
+	"fmt"
+	"io"
+	"net/http"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+)
+
+// DBStats describes what VictoriaLogs holds (Settings > Data). Sizes are in
+// bytes; a field VictoriaLogs did not give stays at its zero value.
+type DBStats struct {
+	Rows       int64  `json:"rows"`       // stored log lines
+	DiskBytes  int64  `json:"diskBytes"`  // compressed data + index, on disk
+	IndexBytes int64  `json:"indexBytes"` // index part of DiskBytes
+	RawBytes   int64  `json:"rawBytes"`   // data before compression
+	FreeBytes  int64  `json:"freeBytes"`  // free space on the VictoriaLogs volume
+	Days       int64  `json:"days"`       // per-day partitions
+	Retention  string `json:"retention"`  // -retentionPeriod, e.g. "30d"
+	Oldest     string `json:"oldest,omitempty"`
+	Newest     string `json:"newest,omitempty"`
+	Last1h     int64  `json:"last1h"`
+	Last24h    int64  `json:"last24h"`
+	Hosts      int64  `json:"hosts"`
+	Apps       int64  `json:"apps"`
+	QueryError string `json:"queryError,omitempty"` // the LogsQL part failed, the metrics are still valid
+	Updated    string `json:"updated"`
+}
+
+// dbStatsCache keeps the last answer for a while: the LogsQL part reads the
+// whole base, which is too heavy to repeat each time the tab is opened.
+type dbStatsCache struct {
+	mu   sync.Mutex
+	at   time.Time
+	last *DBStats
+}
+
+const dbStatsTTL = 30 * time.Second
+
+func (c *dbStatsCache) get(ctx context.Context, s *Store, force bool) (*DBStats, error) {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	if c.last != nil && !force && time.Since(c.at) < dbStatsTTL {
+		return c.last, nil
+	}
+	st, err := s.DBStats(ctx)
+	if err != nil {
+		return nil, err
+	}
+	c.last, c.at = st, time.Now()
+	return st, nil
+}
+
+// DBStats reads the storage metrics of VictoriaLogs (/metrics), then counts
+// with LogsQL what the metrics do not tell (period, recent volume, sources).
+func (s *Store) DBStats(ctx context.Context) (*DBStats, error) {
+	st, err := s.storageMetrics(ctx)
+	if err != nil {
+		return nil, err
+	}
+	st.Updated = time.Now().UTC().Format(time.RFC3339)
+	if st.Rows == 0 {
+		return st, nil
+	}
+
+	qctx, cancel := context.WithTimeout(ctx, 20*time.Second)
+	defer cancel()
+	rows, err := s.Query(qctx, "* | stats min(_time) oldest, max(_time) newest, count_uniq(host) hosts, count_uniq(app) apps")
+	if err == nil && len(rows) > 0 {
+		r := rows[0]
+		st.Oldest, _ = r["oldest"].(string)
+		st.Newest, _ = r["newest"].(string)
+		st.Hosts, st.Apps = toInt(r["hosts"]), toInt(r["apps"])
+		rows, err = s.Query(qctx, "_time:24h | stats count() last24h, count() if (_time:1h) last1h")
+		if err == nil && len(rows) > 0 {
+			st.Last24h, st.Last1h = toInt(rows[0]["last24h"]), toInt(rows[0]["last1h"])
+		}
+	}
+	if err != nil {
+		st.QueryError = err.Error()
+	}
+	return st, nil
+}
+
+func (s *Store) storageMetrics(ctx context.Context) (*DBStats, error) {
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, s.base+"/metrics", nil)
+	if err != nil {
+		return nil, err
+	}
+	resp, err := s.client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode != http.StatusOK {
+		msg, _ := io.ReadAll(io.LimitReader(resp.Body, 512))
+		return nil, fmt.Errorf("VictoriaLogs /metrics: HTTP %d: %s", resp.StatusCode, strings.TrimSpace(string(msg)))
+	}
+	return parseStorageMetrics(resp.Body)
+}
+
+// parseStorageMetrics picks the storage figures out of the Prometheus text
+// format of VictoriaLogs' /metrics (app/vlstorage).
+func parseStorageMetrics(r io.Reader) (*DBStats, error) {
+	st := &DBStats{}
+	sc := bufio.NewScanner(r)
+	sc.Buffer(make([]byte, 64*1024), 1<<20)
+	for sc.Scan() {
+		line := sc.Text()
+		if line == "" || line[0] == '#' {
+			continue
+		}
+		name, labels, value := splitMetric(line)
+		switch name {
+		case "vl_storage_rows":
+			st.Rows += int64(value)
+		case "vl_data_size_bytes":
+			st.DiskBytes += int64(value)
+			if labels["type"] == "indexdb" {
+				st.IndexBytes += int64(value)
+			}
+		case "vl_uncompressed_data_size_bytes":
+			st.RawBytes += int64(value)
+		case "vl_free_disk_space_bytes":
+			st.FreeBytes = int64(value)
+		case "vl_partitions":
+			st.Days = int64(value)
+		case "flag":
+			if labels["name"] == "retentionPeriod" {
+				st.Retention = labels["value"]
+			}
+		}
+	}
+	return st, sc.Err()
+}
+
+// splitMetric splits `name{a="x",b="y"} 12` into its parts. Label values with
+// escaped quotes are not expected in the metrics read here.
+func splitMetric(line string) (string, map[string]string, float64) {
+	sp := strings.LastIndexByte(line, ' ')
+	if sp < 0 {
+		return "", nil, 0
+	}
+	value, _ := strconv.ParseFloat(line[sp+1:], 64)
+	head := line[:sp]
+	name, rest, ok := strings.Cut(head, "{")
+	if !ok {
+		return head, nil, value
+	}
+	labels := map[string]string{}
+	rest = strings.TrimSuffix(rest, "}")
+	for rest != "" {
+		k, v, ok := strings.Cut(rest, `="`)
+		if !ok {
+			break
+		}
+		val, after, _ := strings.Cut(v, `"`)
+		labels[strings.TrimSpace(k)] = val
+		rest = strings.TrimPrefix(after, ",")
+	}
+	return name, labels, value
+}

dbstats_test.go

@@ -0,0 +1,89 @@
+package main
+
+import (
+	"encoding/json"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+	"time"
+)
+
+// Excerpt of VictoriaLogs v1.52 /metrics.
+const vlMetrics = `# a comment
+vl_free_disk_space_bytes{path="/vlogs"} 52428800000
+vl_storage_rows{type="storage/inmemory"} 120
+vl_storage_rows{type="storage/small"} 3000
+vl_storage_rows{type="storage/big"} 1000000
+vl_partitions 12
+vl_data_size_bytes{type="indexdb"} 2048
+vl_data_size_bytes{type="storage"} 1048576
+vl_compressed_data_size_bytes{type="storage/big"} 1000000
+vl_uncompressed_data_size_bytes{type="storage/inmemory"} 4096
+vl_uncompressed_data_size_bytes{type="storage/small"} 100000
+vl_uncompressed_data_size_bytes{type="storage/big"} 20000000
+flag{name="retentionPeriod", value="30d", is_set="true"} 1
+flag{name="httpListenAddr", value=":9428", is_set="true"} 1
+`
+
+func TestParseStorageMetrics(t *testing.T) {
+	st, err := parseStorageMetrics(strings.NewReader(vlMetrics))
+	if err != nil {
+		t.Fatal(err)
+	}
+	want := DBStats{Rows: 1003120, DiskBytes: 1050624, IndexBytes: 2048, RawBytes: 20104096, FreeBytes: 52428800000, Days: 12, Retention: "30d"}
+	if *st != want {
+		t.Fatalf("got %+v\nwant %+v", *st, want)
+	}
+}
+
+// statsVL answers /metrics and the LogsQL queries of DBStats.
+type statsVL struct{ queries int }
+
+func (v *statsVL) RoundTrip(r *http.Request) (*http.Response, error) {
+	body := vlMetrics
+	if r.URL.Path == "/select/logsql/query" {
+		v.queries++
+		_ = r.ParseForm()
+		if strings.HasPrefix(r.PostForm.Get("query"), "_time:24h") {
+			body = `{"last24h":"5000","last1h":"300"}` + "\n"
+		} else {
+			body = `{"oldest":"2026-09-21T08:00:00Z","newest":"2026-10-03T15:00:00Z","hosts":"4","apps":"17"}` + "\n"
+		}
+	}
+	return &http.Response{StatusCode: http.StatusOK, Body: io.NopCloser(strings.NewReader(body)), Header: http.Header{}}, nil
+}
+
+func TestDBStatsHandler(t *testing.T) {
+	vl := &statsVL{}
+	store := NewStore("http://vl", 10, 10, time.Second, nil)
+	store.client.Transport = vl
+	store.streamClient.Transport = vl
+	a := &API{store: store}
+
+	get := func(url string) DBStats {
+		rec := httptest.NewRecorder()
+		a.dbStats(rec, httptest.NewRequest("GET", url, nil))
+		if rec.Code != http.StatusOK {
+			t.Fatalf("status %d: %s", rec.Code, rec.Body)
+		}
+		var st DBStats
+		if err := json.Unmarshal(rec.Body.Bytes(), &st); err != nil {
+			t.Fatal(err)
+		}
+		return st
+	}
+	st := get("/api/dbstats")
+	if st.Rows != 1003120 || st.Oldest != "2026-09-21T08:00:00Z" || st.Hosts != 4 || st.Apps != 17 || st.Last24h != 5000 || st.Last1h != 300 || st.QueryError != "" {
+		t.Fatalf("unexpected stats: %+v", st)
+	}
+	get("/api/dbstats")
+	if vl.queries != 2 {
+		t.Fatalf("second call within the TTL should be cached, got %d queries", vl.queries)
+	}
+	get("/api/dbstats?refresh=1")
+	if vl.queries != 4 {
+		t.Fatalf("refresh=1 should query again, got %d queries", vl.queries)
+	}
+}

web/app.js

@@ -126,6 +126,16 @@ const I18N = {
     fontHelp: 'Free fonts. The built-in ones (Inconsolata Condensed, the narrowest, Iosevka and Ubuntu Mono) are served by LogStream itself and work offline; they are narrow, so more text fits on each line. The others are loaded by your browser from Bunny Fonts, a privacy-friendly European font service; without internet access, the system font is used.',
     previewMsgs: ['error: link down on eth1, carrier lost', 'warning: disk /dev/sda temperature 58°C', 'backup finished: ok (12.4 GB in 00:14:32)'],
     dangerZone: 'Danger zone',
+    dbTitle: 'Database', dbRefresh: 'Refresh', dbLoading: 'Loading…',
+    dbUnits: ['B', 'KB', 'MB', 'GB', 'TB'],
+    dbRows: 'Stored lines', dbDisk: 'Size on disk', dbIndex: (x) => `including ${x} of index`,
+    dbRaw: 'Raw size', dbRatio: (x) => `compressed ×${x}`,
+    dbPeriod: 'Period', dbFromTo: (p) => `${p.from} → ${p.to}`, dbDays: (n) => `${n} day${n > 1 ? 's' : ''}`,
+    dbRetention: (r) => `retention ${r}`,
+    dbRecent: 'Last 24 h', dbLastHour: (n) => `${n} in the last hour`,
+    dbSources: 'Sources', dbHostsApps: (p) => `${p.h} host${p.hn > 1 ? 's' : ''} · ${p.a} app${p.an > 1 ? 's' : ''}`,
+    dbFree: 'Free disk space', dbEmpty: 'The database is empty.',
+    dbQueryErr: 'Some figures could not be computed: ',
     purgeHelp: 'Permanently delete every stored log to start from scratch. Color tags and settings are kept.',
     purgeBtn: 'Delete all logs…',
     purgePrompt: 'This permanently deletes ALL stored logs.\n\nType PURGE to confirm:',
@@ -285,6 +295,16 @@ const I18N = {
     fontHelp: 'Polices libres. Les polices intégrées (Inconsolata Condensed, la plus étroite, Iosevka et Ubuntu Mono) sont servies par LogStream lui-même et fonctionnent hors ligne ; elles sont étroites, donc chaque ligne affiche plus de texte. Les autres sont chargées par votre navigateur depuis Bunny Fonts, un service européen respectueux de la vie privée ; sans accès à internet, la police du système est utilisée.',
     previewMsgs: ['error: link down on eth1, carrier lost', 'warning: disk /dev/sda temperature 58°C', 'backup finished: ok (12.4 GB in 00:14:32)'],
     dangerZone: 'Zone de danger',
+    dbTitle: 'Base de données', dbRefresh: 'Actualiser', dbLoading: 'Chargement…',
+    dbUnits: ['o', 'Ko', 'Mo', 'Go', 'To'],
+    dbRows: 'Lignes stockées', dbDisk: 'Taille sur disque', dbIndex: (x) => `dont ${x} d'index`,
+    dbRaw: 'Taille brute', dbRatio: (x) => `compression ×${x}`,
+    dbPeriod: 'Période', dbFromTo: (p) => `${p.from} → ${p.to}`, dbDays: (n) => `${n} jour${n > 1 ? 's' : ''}`,
+    dbRetention: (r) => `rétention ${r}`,
+    dbRecent: 'Dernières 24 h', dbLastHour: (n) => `${n} sur la dernière heure`,
+    dbSources: 'Sources', dbHostsApps: (p) => `${p.h} hôte${p.hn > 1 ? 's' : ''} · ${p.a} application${p.an > 1 ? 's' : ''}`,
+    dbFree: 'Espace disque libre', dbEmpty: 'La base est vide.',
+    dbQueryErr: 'Certains chiffres n\'ont pas pu être calculés : ',
     purgeHelp: 'Supprime définitivement tous les logs stockés pour repartir de zéro. Les tags de couleur et les réglages sont conservés.',
     purgeBtn: 'Supprimer tous les logs…',
     purgePrompt: 'Cette action supprime définitivement TOUS les logs stockés.\n\nTapez PURGE pour confirmer :',
@@ -509,6 +529,7 @@ function setLang(next) {
   renderPresets();
   renderTimeSettings();
   renderPurge();
+  renderDbStats();
   renderInterface();
   renderSyslog();
   renderHost();
@@ -2010,6 +2031,69 @@ setInterval(() => {
   }
 }, 4000);
 
+/* ================= Database statistics ================= */
+
+// 1536 -> "1,5 Ko" / "1.5 KB" (binary multiples, the usual reading for disk sizes).
+function fmtBytes(n) {
+  const units = t('dbUnits');
+  let i = 0;
+  n = Number(n || 0);
+  while (n >= 1024 && i < units.length - 1) { n /= 1024; i++; }
+  const digits = i === 0 || n >= 100 ? 0 : 1;
+  return `${n.toLocaleString(t('locale'), { maximumFractionDigits: digits })} ${units[i]}`;
+}
+
+const db = { stats: null, error: null, loading: false };
+
+function renderDbStats() {
+  const el = $('#dbStats');
+  const s = db.stats;
+  if (!s) {
+    el.innerHTML = `<div class="db-msg${db.error ? ' bad' : ''}">${esc(db.error || t('dbLoading'))}</div>`;
+    return;
+  }
+  const row = (k, v, sub) => `<dt>${esc(k)}</dt><dd><b>${esc(v)}</b>${sub ? ` <span class="muted">${esc(sub)}</span>` : ''}</dd>`;
+  const day = (x) => fmtFull(x).replace(/[.,]\d{3}(?=\D*$)/, '');
+  let html = row(t('dbRows'), fmtNum(s.rows));
+  html += row(t('dbDisk'), fmtBytes(s.diskBytes), s.indexBytes ? t('dbIndex', fmtBytes(s.indexBytes)) : '');
+  if (s.rawBytes) {
+    const ratio = s.diskBytes ? (s.rawBytes / s.diskBytes).toLocaleString(t('locale'), { maximumFractionDigits: 1 }) : '';
+    html += row(t('dbRaw'), fmtBytes(s.rawBytes), ratio ? t('dbRatio', ratio) : '');
+  }
+  if (s.oldest && s.newest) {
+    const sub = [s.days ? t('dbDays', s.days) : '', s.retention ? t('dbRetention', s.retention) : ''].filter(Boolean).join(' · ');
+    html += row(t('dbPeriod'), t('dbFromTo', { from: day(s.oldest), to: day(s.newest) }), sub);
+  } else if (s.retention) {
+    html += row(t('dbPeriod'), '—', t('dbRetention', s.retention));
+  }
+  if (s.rows) {
+    html += row(t('dbRecent'), fmtNum(s.last24h), t('dbLastHour', fmtNum(s.last1h)));
+    html += row(t('dbSources'), t('dbHostsApps', { h: fmtNum(s.hosts), hn: s.hosts, a: fmtNum(s.apps), an: s.apps }));
+  }
+  if (s.freeBytes) html += row(t('dbFree'), fmtBytes(s.freeBytes));
+  if (!s.rows) html += `<div class="db-msg">${esc(t('dbEmpty'))}</div>`;
+  if (s.queryError) html += `<div class="db-msg bad">${esc(t('dbQueryErr') + s.queryError)}</div>`;
+  el.innerHTML = html;
+}
+
+async function loadDbStats(refresh = false) {
+  if (db.loading) return;
+  db.loading = true;
+  $('#dbRefresh').disabled = true;
+  try {
+    db.stats = await api('/api/dbstats' + (refresh ? '?refresh=1' : ''));
+    db.error = null;
+  } catch (e) {
+    db.stats = null;
+    db.error = e.message;
+  } finally {
+    db.loading = false;
+    $('#dbRefresh').disabled = false;
+  }
+  renderDbStats();
+}
+$('#dbRefresh').addEventListener('click', () => loadDbStats(true));
+
 /* ================= Purge ================= */
 
 const purge = { allowed: true, running: 0, error: null, code: null, wasRunning: false, timer: null };
@@ -2039,6 +2123,7 @@ async function loadPurgeStatus() {
       refresh();
       loadFacets();
       loadStats();
+      loadDbStats(true);
     }
     purge.running = s.running || 0;
   } catch { /* shown on the next attempt */ }
@@ -2237,6 +2322,8 @@ $('#settingsBtn').addEventListener('click', () => {
   loadSyslog();
   loadHost();
   loadDocker();
+  renderDbStats();
+  loadDbStats();
   showSettingsTab(store.get('settingsTab', 'locale'));
   $('#settingsDlg').showModal();
 });

web/index.html

@@ -339,6 +339,11 @@
           <div class="set-panel wide" role="tabpanel" data-panel="data" hidden>
             <section class="set-section danger">
               <h3 data-i18n="dangerZone">Danger zone</h3>
+              <div class="db-head">
+                <span class="lbl" data-i18n="dbTitle">Database</span>
+                <button id="dbRefresh" class="link-btn" type="button" data-i18n="dbRefresh">Refresh</button>
+              </div>
+              <dl id="dbStats" class="db-stats"></dl>
               <p class="muted small" data-i18n="purgeHelp"></p>
               <div class="purge-row">
                 <button id="purgeBtn" class="btn danger" type="button" data-i18n="purgeBtn">Delete all logs…</button>

web/style.css

@@ -559,6 +559,17 @@ select.field:focus { outline: 0; border-color: var(--accent); box-shadow: 0 0 0
   background: var(--panel-2); font-family: var(--mono); font-size: 12.5px;
 }
 .set-section.danger h3 { color: var(--sev-err); }
+.db-head { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; margin: 4px 0 6px; }
+.db-stats {
+  display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 5px 14px;
+  margin: 0 0 14px; padding: 10px 12px; border-radius: 8px; background: var(--panel-2); font-size: 12.5px;
+}
+.db-stats dt { color: var(--muted); }
+.db-stats dd { margin: 0; min-width: 0; overflow-wrap: anywhere; }
+.db-stats dd b { font-weight: 600; font-variant-numeric: tabular-nums; }
+.db-msg { grid-column: 1 / -1; color: var(--muted); }
+.db-msg.bad { color: var(--sev-err); }
+.link-btn:disabled { opacity: .5; cursor: default; text-decoration: none; }
 .purge-row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 10px; }
 .btn.danger { color: var(--sev-err); border-color: color-mix(in srgb, var(--sev-err) 45%, var(--border)); }
 .btn.danger:hover:not(:disabled) { background: var(--sev-err); border-color: var(--sev-err); color: #fff; }