如何通过JS日志分析Debian系统负载

#!/bin/bash
timestamp=$(date +"%Y-%m-%d %H:%M:%S")
load=$(uptime | awk -F'average: ' '{print $2}' | awk '{print $1}')
echo "$timestamp, $load" >> /var/log/system_load.log

crontab -e

* * * * * /path/to/collect_load.sh
```  (将`/path/to/`替换为脚本的实际路径)


**二、JavaScript分析脚本**

接下来，编写一个Node.js脚本`analyze_load.js`来读取和处理日志数据：

```javascript
const fs = require('fs');
const readline = require('readline');

const logFile = '/var/log/system_load.log';

const rl = readline.createInterface({
  input: fs.createReadStream(logFile),
  crlfDelay: Infinity
});

let loadData = [];

rl.on('line', (line) => {
  const [timestamp, load] = line.split(', ');
  loadData.push({ timestamp, load: parseFloat(load) });
});

rl.on('close', () => {
  const avgLoad = loadData.reduce((sum, entry) => sum + entry.load, 0) / loadData.length;
  console.log(`平均负载: ${avgLoad}`);

  loadData.forEach((entry, index) => {
    if (index > 0) {
      const prevEntry = loadData[index - 1];
      const loadChange = entry.load - prevEntry.load;
      console.log(`从 ${prevEntry.timestamp} 到 ${entry.timestamp} 负载变化: ${loadChange}`);
    }
  });
});

node analyze_load.js