PHP で Elasticsearch を使用してリアルタイムのモニタリングとダッシュボードを構築する

{
    "require": {
        "elasticsearch/elasticsearch": "^7.0"
    }
}

<?php
require 'vendor/autoload.php';

use ElasticsearchClientBuilder;

// 连接到本地的 Elasticsearch 实例
$client = ClientBuilder::create()->setHosts(['localhost:9200'])->build();

// 检查 Elasticsearch 是否连接成功
$response = $client->ping();
if ($response) {
    echo "成功连接到 Elasticsearch.";
} else {
    echo "无法连接到 Elasticsearch.";
}
?>

<?php
// 创建一个索引
$params = [
    'index' => 'monitoring',
    'body' => [
        'settings' => [
            'number_of_shards' => 1,
            'number_of_replicas' => 0
        ],
        'mappings' => [
            'properties' => [
                'timestamp' => ['type' => 'date'],
                'metric' => ['type' => 'keyword'],
                'value' => ['type' => 'float']
            ]
        ]
    ]
];

// 发送请求
$response = $client->indices()->create($params);

if ($response['acknowledged']) {
    echo "索引创建成功.";
} else {
    echo "索引创建失败.";
}
?>

<?php
// 准备要发送的数据
$data = [
    'timestamp' => date('Y-m-d H:i:s'),
    'metric' => 'cpu_usage',
    'value' => 75.3
];

// 发送数据
$params = [
    'index' => 'monitoring',
    'body' => $data
];

$response = $client->index($params);

if ($response['result'] == 'created') {
    echo "数据发送成功.";
} else {
    echo "数据发送失败.";
}
?>

<?php
// 查询最近一小时的监控数据
$params = [
    'index' => 'monitoring',
    'body' => [
        'query' => [
            'range' => [
                'timestamp' => [
                    'gte' => 'now-1h'
                ]
            ]
        ],
        'sort' => [
            'timestamp' => 'asc'
        ]
    ]
];

$response = $client->search($params);

// 处理查询结果
if (isset($response['hits']['hits'])) {
    foreach ($response['hits']['hits'] as $hit) {
        echo "时间：" . $hit['_source']['timestamp'] . ", ";
        echo "指标：" . $hit['_source']['metric'] . ", ";
        echo "值：" . $hit['_source']['value'] . "<br>";
    }
} else {
    echo "未找到监控数据.";
}
?>