jsp 语言 JSP 结合 Prometheus 实现服务监控

JSP 结合 Prometheus 实现服务监控：代码与实践

随着互联网技术的飞速发展，服务监控已经成为保证系统稳定性和性能的关键环节。JSP（JavaServer Pages）作为一种流行的服务器端脚本语言，常用于构建动态网页。Prometheus 是一个开源监控系统，能够有效地收集和存储系统指标数据。本文将探讨如何使用 JSP 结合 Prometheus 实现服务监控，并通过实际代码示例进行演示。

JSP 简介

JSP 是一种基于 Java 的服务器端脚本语言，它允许开发者在 HTML 页面中嵌入 Java 代码。JSP 页面由 HTML 标签、JSP 标签和 Java 代码组成。当请求到达服务器时，JSP 引擎会解析页面，执行其中的 Java 代码，并生成 HTML 页面返回给客户端。

Prometheus 简介

Prometheus 是一个开源监控系统，它通过抓取目标上的指标来收集数据。Prometheus 支持多种数据源，包括 HTTP、JMX、命令行工具等。它使用时间序列数据库存储数据，并提供了丰富的查询语言 PromQL 用于数据分析和可视化。

JSP 结合 Prometheus 实现服务监控

1. 环境搭建

我们需要搭建一个 JSP 环境和一个 Prometheus 服务器。以下是搭建步骤：

- 安装 Java 开发环境，如 JDK 1.8 或更高版本。

- 安装 Apache Tomcat 服务器，用于运行 JSP 应用。

- 下载并安装 Prometheus 服务器。

2. 创建 JSP 应用

接下来，我们创建一个简单的 JSP 应用，用于展示 Prometheus 指标数据。

2.1 创建 JSP 页面

创建一个名为 `monitor.jsp` 的 JSP 页面，内容如下：

jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>

<html>

<head>

    <title>Prometheus 监控</title>

</head>

<body>

    <h1>Prometheus 监控</h1>

    <div>

        <h2>系统负载</h2>

        <p>系统负载：${systemLoad}</p>

    </div>

    <div>

        <h2>内存使用率</h2>

        <p>内存使用率：${memoryUsage}</p>

    </div>

</body>

</html>

2.2 创建 JavaBean

创建一个名为 `SystemMonitor.java` 的 JavaBean，用于获取系统指标数据：

java
public class SystemMonitor {

    public double getSystemLoad() {

        // 获取系统负载

        // 这里使用 jstat 工具获取 Java 虚拟机负载

        String command = "jstat -load 1 1";

        Process process = Runtime.getRuntime().exec(command);

        try {

            BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));

            String line = reader.readLine();

            String[] values = line.split("s+");

            return Double.parseDouble(values[1]);

        } catch (IOException e) {

            e.printStackTrace();

        }

        return 0.0;

    }

public double getMemoryUsage() {

        // 获取内存使用率

        // 这里使用 jstat 工具获取 Java 虚拟机内存使用率

        String command = "jstat -gc 1 1";

        Process process = Runtime.getRuntime().exec(command);

        try {

            BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));

            String line = reader.readLine();

            String[] values = line.split("s+");

            return Double.parseDouble(values[4]);

        } catch (IOException e) {

            e.printStackTrace();

        }

        return 0.0;

    }

}

2.3 配置 JSP 页面

在 `monitor.jsp` 页面中，使用 `SystemMonitor` JavaBean 获取系统指标数据：

jsp
<%@ page import="com.example.SystemMonitor" %>

<%@ page contentType="text/html;charset=UTF-8" language="java" %>

<html>

<head>

    <title>Prometheus 监控</title>

</head>

<body>

    <h1>Prometheus 监控</h1>

    <div>

        <h2>系统负载</h2>

        <p>系统负载：${systemMonitor.getSystemLoad()}</p>

    </div>

    <div>

        <h2>内存使用率</h2>

        <p>内存使用率：${systemMonitor.getMemoryUsage()}</p>

    </div>

</body>

</html>

3. 配置 Prometheus

接下来，我们需要配置 Prometheus 服务器以收集 JSP 应用的指标数据。

3.1 创建 Prometheus 配置文件

创建一个名为 `prometheus.yml` 的 Prometheus 配置文件，内容如下：

yaml
global:

  scrape_interval: 15s

scrape_configs:

  - job_name: 'jsp_monitor'

    static_configs:

      - targets: ['localhost:8080']

        labels:

          app: 'jsp_monitor'

3.2 配置 JSP 应用以暴露指标

为了使 Prometheus 能够收集指标数据，我们需要在 JSP 应用中添加一个端点，用于暴露指标数据。

创建一个名为 `metrics.jsp` 的 JSP 页面，内容如下：

jsp
<%@ page contentType="text/plain;charset=UTF-8" language="java" %>

<%@ page import="com.example.SystemMonitor" %>

<%@ page import="java.util.Date" %>

<html>

<head>

    <title>Prometheus Metrics</title>

</head>

<body>

    <h1>Prometheus Metrics</h1>

    <pre>

 HELP system_load System load average

 TYPE system_load gauge

system_load ${systemMonitor.getSystemLoad()} ${new Date().getTime() / 1000}

 HELP memory_usage Memory usage percentage

 TYPE memory_usage gauge

memory_usage ${systemMonitor.getMemoryUsage()} ${new Date().getTime() / 1000}

</pre>

</body>

</html>

3.3 配置 Tomcat 以暴露 `metrics.jsp`

在 Tomcat 的 `conf/server.xml` 文件中，添加以下配置以允许访问 `metrics.jsp`：

```xml

<Connector port="8080" protocol="HTTP/1.1"

connectionTimeout="20000"

redirectPort="8443"

URIEncoding="UTF-8"

redirectPort="8443"

useBodyEncodingForURI="true"

allowTrace="true"

allowCrossDomainRequests="true"

virtualHost="localhost"

path="/metrics"

redirectPort="8443"

proxyPort="8080"

proxyName="localhost"

proxySet="true"

proxyHost="localhost"

proxyPort="8080"

proxyType="http"

proxyScheme="http"

proxyUser="tomcat"

proxyPassword="tomcat"

proxyWorkDir="."

proxyReadTimeout="20000"

proxyConnectTimeout="20000"

proxyMaxForwards="10"

proxyAllowLocal="true"

proxyAllowLocalhost="true"

proxyAllowRemote="true"

proxyAllowRemotehost="true"

proxyAllowRemoteuser="true"

proxyAllowRemoteuserhost="true"

proxyAllowRemoteuserhostport="true"

proxyAllowRemoteuserport="true"

proxyAllowRemoteuseruri="true"

proxyAllowRemoteuseruriport="true"

proxyAllowRemoteuseruriportpath="true"

proxyAllowRemoteuseruriportpathquery="true"

proxyAllowRemoteuseruriportpathqueryfragment="true"

proxyAllowRemoteuseruriportquery="true"

proxyAllowRemoteuseruriquery="true"

proxyAllowRemoteuseruriqueryfragment="true"

proxyAllowRemoteuseruriqueryparam="true"

proxyAllowRemoteuseruriqueryparamvalue="true"

proxyAllowRemoteuseruriqueryparamvaluepath="true"

proxyAllowRemoteuseruriqueryparamvaluepathquery="true"

proxyAllowRemoteuseruriqueryparamvaluepathqueryfragment="true"

proxyAllowRemoteuseruriqueryparamvaluequery="true"

proxyAllowRemoteuseruriqueryparamvaluequeryfragment="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparam="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvalue="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluepath="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluepathquery="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluepathqueryfragment="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentquery="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparam="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvalue="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluepath="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluepathquery="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluepathqueryfragment="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluequery="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluequeryfragmentquery="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparam="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvalue="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluepath="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluepathquery="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluepathqueryfragment="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequery="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentquery="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparam="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvalue="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluepath="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluepathquery="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluepathqueryfragment="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequery="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentquery="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparam="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvalue="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluepath="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluepathquery="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluepathqueryfragment="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequery="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentquery="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparam="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluequeryfragmentqueryparamvaluepathqueryfragment="true"

proxyAllowRemoteuseruriqueryparamvaluequeryparamvaluequeryfragmentqueryparamvaluequery

jsp 语言 JSP 结合 Prometheus 实现服务监控

JavaScript 语言处理文本的文本内容的国际化支持

JavaScript 语言实现图片的懒加载与图像优化工作流

Comments NOTHING

取消回复