varaverk: Docker memory — use docker stats sum instead of raw cgroup (matches Unraid dashboard)

Plugin/usr/local/emhttp/plugins/varaverk/include/monitor.php

@@ -124,23 +124,18 @@ function vv_memory_breakdown(): array {
         if (preg_match('/^size\s+\d+\s+(\d+)/', $line, $m)) { $arcKb = (int)($m[1] / 1024); break; }
     }
 
-    // Docker — try paths in order: Unraid cgv2, systemd cgv2 scopes, cgv1
+    // Docker — sum docker stats used memory per container (matches Unraid dashboard)
     $dockerKb = 0;
-    $cgCandidates = [
-        '/sys/fs/cgroup/docker/memory.current',
-        '/sys/fs/cgroup/memory/docker/memory.usage_in_bytes',
-    ];
-    foreach ($cgCandidates as $path) {
-        if (file_exists($path)) {
-            $dockerKb = (int)((float)@file_get_contents($path) / 1024);
-            break;
-        }
-    }
-    if ($dockerKb === 0) {
-        foreach (glob('/sys/fs/cgroup/system.slice/docker-*.scope/memory.current') ?: [] as $f) {
-            $v = @file_get_contents($f);
-            if ($v !== false) $dockerKb += (int)((float)$v / 1024);
-        }
+    $dsOut = shell_exec("docker stats --no-stream --format '{{.MemUsage}}' 2>/dev/null") ?: '';
+    foreach (explode("\n", trim($dsOut)) as $line) {
+        if (!preg_match('/^([0-9.]+)(GiB|MiB|KiB|B)\s*\//', trim($line), $m)) continue;
+        $val = (float)$m[1];
+        $dockerKb += match($m[2]) {
+            'GiB'   => (int)($val * 1048576),
+            'MiB'   => (int)($val * 1024),
+            'KiB'   => (int)$val,
+            default => (int)($val / 1024),
+        };
     }
 
     // VM (QEMU/KVM RSS)