智能错误检测 + 提示版本（原生 HTML + JS + ECharts），这样：
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如果数据为空或 metricId 未定义，会显示 “暂无监控数据”；
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如果 Gnocchi API 401（Token 过期），会提示 “Token 无效”；
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如果取到数据，则正常绘图。
0 M. O, c! K& d6 b✅ 完整示例（直接可替换你的前端代码）
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假设你模板变量是 metrics 和 token：
% |) |* e: E' |& P# O) i<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8" />
<title>资源监控</title>
<script src="https://cdn.jsdelivr.net/npm/echarts/dist/echarts.min.js"></script>
<style>
.chart-box {
width: 48%;
height: 300px;
display: inline-block;
margin: 10px;
border: 1px solid #eee;
position: relative;
}
.chart-error {
position: absolute;
top: 45%;
left: 50%;
transform: translate(-50%, -50%);
color: #888;
font-size: 14px;
}
</style>
</head>
<body>
<h2>资源监控</h2>
' D) }7 j: m' A; f) k1 ? <div id="cpu" class="chart-box"></div>
<div id="memory" class="chart-box"></div>
<div id="disk" class="chart-box"></div>
<div id="network" class="chart-box"></div>
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<script>
const metrics = {
cpu: "{{ metrics.cpu }}",
memory: "{{ metrics.memory.usage }}",
disk: "{{ metrics.disk.root.size }}",
network: "{{ metrics.compute.instance.booting.time }}"
};
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const token = "{{ token }}"; // 后端传入 Keystone Token
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const charts = {
cpu: echarts.init(document.getElementById('cpu')),
memory: echarts.init(document.getElementById('memory')),
disk: echarts.init(document.getElementById('disk')),
network: echarts.init(document.getElementById('network'))
};
5 }& e. B6 t3 O* \9 j u( Z const titles = {
cpu: "CPU 使用率",
memory: "内存使用率",
disk: "磁盘 I/O",
network: "网络活动"
};
! e1 h" P% j* g2 ?$ V const colors = {
cpu: "#e74c3c",
memory: "#3498db",
disk: "#2ecc71",
network: "#9b59b6"
};
0 O+ V! B" l' u9 }% Q async function loadMetric(chart, metricId, title, color) {
// 没有 metricId，直接提示
if (!metricId || metricId === 'None' || metricId === 'undefined') {
chart.clear();
chart.getDom().innerHTML = `<div class="chart-error">⚠️ 暂无监控数据</div>`;
return;
}
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try {
const res = await fetch(`http://controller:8041/v1/metric/${metricId}/measures`, {
headers: { "X-Auth-Token": token }
});
3 s1 |! c6 G' ]0 k1 |0 X0 Z if (res.status === 401) {
chart.getDom().innerHTML = `<div class="chart-error">
发表于 2025-11-9 21:17:28