85 lines
2.4 KiB
PHP
85 lines
2.4 KiB
PHP
<?php
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namespace App\Filament\Widgets;
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use App\Services\PrometheusService;
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use Filament\Widgets\ChartWidget;
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class PrometheusMemory extends ChartWidget
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{
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protected static ?int $sort = 4;
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protected static ?string $heading = '内存占用率';
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// 固定显示的数据点数
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private const MAX_POINTS = 6;
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protected function getData(): array
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{
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$prometheus = new PrometheusService();
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// 查询过去 1 分钟内的每 6 秒一个数据点
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$memoryUsageRange = $prometheus->queryRange(
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'(1 - (avg_over_time(node_memory_MemAvailable_bytes[1m]) / avg_over_time(node_memory_MemTotal_bytes[1m]))) * 100',
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now()->subMinutes(1)->timestamp,
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now()->timestamp,
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6 // 每6秒一个数据点
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);
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$labels = [];
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$data = [];
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if (!empty($memoryUsageRange['data']['result'][0]['values'])) {
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// 获取内存使用率数据
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$memoryValues = array_column($memoryUsageRange['data']['result'][0]['values'], 1, 0);
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// 只保留最新的 MAX_POINTS 个数据点
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$timestamps = array_keys($memoryValues);
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$timestamps = array_slice($timestamps, -self::MAX_POINTS);
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foreach ($timestamps as $timestamp) {
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$labels[] = date('H:i:s', $timestamp); // 格式化时间戳为小时:分钟:秒
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$data[] = round(floatval($memoryValues[$timestamp]), 2); // 取出每个时间点的内存使用率，并保留两位小数
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}
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}
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return [
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'labels' => $labels,
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'datasets' => [
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[
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'label' => '内存占用率 (%)',
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'data' => $data,
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'borderColor' => '#4CAF50',
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'backgroundColor' => 'rgba(76, 175, 80, 0.2)',
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'fill' => true,
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'tension' => 0.2,
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],
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],
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];
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}
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protected function getType(): string
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{
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return 'line';
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}
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protected function getOptions(): array
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{
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return [
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'scales' => [
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'y' => [
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'beginAtZero' => true,
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'min' => 0, // 设置 y 轴最小值
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'max' => 100, // 设置 y 轴最大值
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],
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],
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];
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}
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protected function getPollingInterval(): ?string
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{
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return '6s'; // 每 6 秒更新一次
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}
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}
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