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Prometheus 普罗米修斯监控

周末在家无聊看新闻看到关于监控的东西拿来玩玩试一下感觉还蛮有意思特此记录一下

这里只介绍客户端的配置

1：首先在POM中添加依赖

<dependency>
            <groupId>io.prometheus</groupId>
            <artifactId>simpleclient</artifactId>
            <version>${prometheus.version}</version>
        </dependency>
        <!-- Hotspot JVM metrics-->
        <dependency>
            <groupId>io.prometheus</groupId>
            <artifactId>simpleclient_hotspot</artifactId>
            <version>${prometheus.version}</version>
        </dependency>
        <!-- Exposition servlet-->
        <dependency>
            <groupId>io.prometheus</groupId>
            <artifactId>simpleclient_servlet</artifactId>
            <version>${prometheus.version}</version>
        </dependency>
        <!-- Pushgateway exposition-->
        <dependency>
            <groupId>io.prometheus</groupId>
            <artifactId>simpleclient_pushgateway</artifactId>
            <version>${prometheus.version}</version>
        </dependency>
        <dependency>
            <groupId>io.prometheus</groupId>
            <artifactId>simpleclient_spring_web</artifactId>
            <version>${prometheus.version}</version>
        </dependency>

2:在web.xml文件里添加servlet拦截器

    <servlet>
        <servlet-name>PrometheusServlet</servlet-name>
        <servlet-class>io.prometheus.client.exporter.MetricsServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>PrometheusServlet</servlet-name>
        <url-pattern>/metrics</url-pattern>
    </servlet-mapping>

web.xml

3:添加拦截器class

public class WebInterceptor extends HandlerInterceptorAdapter {
</span><span style="color: #0000ff;">private</span> <span style="color: #0000ff;">static</span> Logger logger = Logger.getLogger(WebInterceptor.<span style="color: #0000ff;">class</span><span style="color: #000000;">);

</span><span style="color: #0000ff;">private</span> <span style="color: #0000ff;">static</span> <span style="color: #0000ff;">final</span> String SYSTEM_ID= "BLOAN-GJJ"<span style="color: #000000;">;

</span><span style="color: #0000ff;">private</span> <span style="color: #0000ff;">static</span> <span style="color: #0000ff;">final</span> String APP_ID= "gjj-ics-credit"<span style="color: #000000;">;

</span><span style="color: #0000ff;">private</span> <span style="color: #0000ff;">static</span> <span style="color: #0000ff;">final</span> String TYPE = "java"<span style="color: #000000;">;


</span><span style="color: #0000ff;">private</span> <span style="color: #0000ff;">static</span> <span style="color: #0000ff;">final</span> Histogram requestLatency =<span style="color: #000000;"> Histogram.build()
        .name(</span>"service_requests_latency_seconds"<span style="color: #000000;">)
        .help(</span>"Request latency in seconds."<span style="color: #000000;">)
        .labelNames(</span>"systemId", "appId", "type", "name", "method"<span style="color: #000000;">).register();

</span><span style="color: #0000ff;">private</span> ThreadLocal&lt;Histogram.Timer&gt;<span style="color: #000000;"> timerThreadLocal;

@Override
</span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">boolean</span> preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) <span style="color: #0000ff;">throws</span><span style="color: #000000;"> Exception {
    </span><span style="color: #0000ff;">return</span> <span style="color: #0000ff;">super</span><span style="color: #000000;">.preHandle(request, response, handler);
}

@Override
</span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">void</span> postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) <span style="color: #0000ff;">throws</span><span style="color: #000000;"> Exception {
    String name </span>= <span style="color: #0000ff;">this</span><span style="color: #000000;">.getName(request, handler).toLowerCase();
    String method </span>=<span style="color: #000000;"> request.getMethod().toUpperCase();
    timerThreadLocal </span>= <span style="color: #0000ff;">new</span> ThreadLocal&lt;&gt;<span style="color: #000000;">();
    timerThreadLocal.set(requestLatency.labels(SYSTEM_ID, APP_ID, TYPE, name, method).startTimer());
    </span><span style="color: #0000ff;">super</span><span style="color: #000000;">.postHandle(request, response, handler, modelAndView);
}

@Override
</span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">void</span> afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) <span style="color: #0000ff;">throws</span><span style="color: #000000;"> Exception {
    </span><span style="color: #0000ff;">super</span><span style="color: #000000;">.afterCompletion(request, response, handler, ex);
    </span><span style="color: #0000ff;">if</span> (timerThreadLocal.get() != <span style="color: #0000ff;">null</span><span style="color: #000000;">) {
        timerThreadLocal.get().observeDuration();
    }
}

@Override
</span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">void</span> afterConcurrentHandlingStarted(HttpServletRequest request, HttpServletResponse response, Object handler) <span style="color: #0000ff;">throws</span><span style="color: #000000;"> Exception {
    </span><span style="color: #0000ff;">super</span><span style="color: #000000;">.afterConcurrentHandlingStarted(request, response, handler);
}

</span><span style="color: #0000ff;">private</span><span style="color: #000000;"> String getName(HttpServletRequest request, Object handler) {
    String name </span>= ""<span style="color: #000000;">;
    </span><span style="color: #0000ff;">try</span><span style="color: #000000;"> {
        </span><span style="color: #0000ff;">if</span> (handler != <span style="color: #0000ff;">null</span>
                &amp;&amp; handler <span style="color: #0000ff;">instanceof</span><span style="color: #000000;"> HandlerMethod) {
            HandlerMethod method </span>=<span style="color: #000000;"> (HandlerMethod) handler;
            String className </span>=<span style="color: #000000;"> ((HandlerMethod) handler).getBeanType().getName();
            name </span>= className + "." +<span style="color: #000000;"> method.getMethod().getName();
        } </span><span style="color: #0000ff;">else</span><span style="color: #000000;"> {
            name </span>=<span style="color: #000000;"> request.getRequestURI();
        }
    } </span><span style="color: #0000ff;">catch</span><span style="color: #000000;"> (Exception ex) {
        logger.error(</span>"getName"<span style="color: #000000;">, ex);
    } </span><span style="color: #0000ff;">finally</span><span style="color: #000000;"> {
        </span><span style="color: #0000ff;">return</span><span style="color: #000000;"> name;
    }
}

}

View Code

4:配置初始化的类

@Component
public class PrometheusConfig {
</span><span style="color: #0000ff;">private</span> <span style="color: #0000ff;">static</span> Logger logger = Logger.getLogger(PrometheusConfig.<span style="color: #0000ff;">class</span><span style="color: #000000;">);

@PostConstruct
</span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> initialize() {
    logger.info(</span>"prometheus init..."<span style="color: #000000;">);
    DefaultExports.initialize();
    logger.info(</span>"prometheus has been initialized..."<span style="color: #000000;">);
}

}

PrometheusConfig.class

5:springmvc.xml中添加拦截器

        <mvc:interceptor>
            <bean class="com.pingan.credit.interceptor.WebInterceptor"/>
        </mvc:interceptor>

6:spring-application.xml 初始化初始化类中的方法

 <bean id="prometheusConfig" class="com.pingan.credit.service.PrometheusConfig" init-method="initialize" />

7:添加controller

@Controller
public class MetricsController {
    private CollectorRegistry registry;
</span><span style="color: #008000;">/**</span><span style="color: #008000;">
 * Construct a MetricsServlet for the default registry.
 </span><span style="color: #008000;">*/</span>
<span style="color: #0000ff;">public</span><span style="color: #000000;"> MetricsController() {
    </span><span style="color: #0000ff;">this</span><span style="color: #000000;">(CollectorRegistry.defaultRegistry);
}

</span><span style="color: #008000;">/**</span><span style="color: #008000;">
 * Construct a MetricsServlet for the given registry.
 </span><span style="color: #008000;">*/</span>
<span style="color: #0000ff;">private</span><span style="color: #000000;"> MetricsController(CollectorRegistry registry) {
    </span><span style="color: #0000ff;">this</span>.registry =<span style="color: #000000;"> registry;
}

@RequestMapping(value</span>="/metrics",method=<span style="color: #000000;"> RequestMethod.GET)
</span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">void</span> metrics(<span style="color: #0000ff;">final</span><span style="color: #000000;"> HttpServletRequest req,
                    </span><span style="color: #0000ff;">final</span> HttpServletResponse resp) <span style="color: #0000ff;">throws</span><span style="color: #000000;"> ServletException,
        IOException {
    resp.setStatus(HttpServletResponse.SC_OK);
    resp.setContentType(TextFormat.CONTENT_TYPE_004);

    </span><span style="color: #0000ff;">try</span> (Writer writer =<span style="color: #000000;"> resp.getWriter()) {
        TextFormat.write004(writer,
                registry.filteredMetricFamilySamples(parse(req)));
        writer.flush();
    }
}

</span><span style="color: #0000ff;">private</span> Set&lt;String&gt;<span style="color: #000000;"> parse(HttpServletRequest req) {
    String[] includedParam </span>= req.getParameterValues("name[]"<span style="color: #000000;">);
    </span><span style="color: #0000ff;">if</span> (includedParam == <span style="color: #0000ff;">null</span><span style="color: #000000;">) {
        </span><span style="color: #0000ff;">return</span><span style="color: #000000;"> Collections.emptySet();
    } </span><span style="color: #0000ff;">else</span><span style="color: #000000;"> {
        </span><span style="color: #0000ff;">return</span> <span style="color: #0000ff;">new</span> HashSet&lt;&gt;<span style="color: #000000;">(Arrays.asList(includedParam));
    }
}

}

启动tomcat 以及你的project 然后进入localhost:8080/metrics就可以看到JVM的信息了

原文地址：https://www.cnblogs.com/showme1942/p/7457451.html

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原文地址：https://www.cnblogs.com/jpfss/p/11887467.html