Prometheus推送度量指标

推送度量指标

偶尔你需要监控不能被获取的实例。它们可能被防火墙保护，或者它们生命周期太短而不能通过拉模式获取数据。Prometheus的Pushgateway允许你将这些实例的时间序列数据推送到Prometheus的代理任务中。结合Prometheus简单的文本导出格式，这使得即使没有客户库，也能使用shell脚本获取数据。

• shell实现用例，查看Readme
• Java, 详见PushGateway类
• Go，详见Push和PushAdd
• Python, 详见Pushgateway
• Ruby, 详见Pushgateway

Java批量任务例子

这个例子主要说明, 如何执行一个批处理任务，并且在没有执行成功时报警

如果使用Maven，添加下面的代码到pom.xml文件中：

        <dependency>
            <groupId>io.prometheus</groupId>
            <artifactId>simpleclient</artifactId>
            <version>0.0.10</version>
        </dependency>
        <dependency>
            <groupId>io.prometheus</groupId>
            <artifactId>simpleclient_pushgateway</artifactId>
            <version>0.0.10</version>
        </dependency>

执行批量作业的代码：

import io.prometheus.client.CollectorRegistry;
import io.prometheus.client.Gauge;
import io.prometheus.client.exporter.PushGateway;

void executeBatchJob() throws Exception {
 CollectorRegistry registry = new CollectorRegistry();
 Gauge duration = Gauge.build()
     .name("my_batch_job_duration_seconds")
     .help("Duration of my batch job in seconds.")
     .register(registry);
 Gauge.Timer durationTimer = duration.startTimer();
 try {
   // Your code here.

   // This is only added to the registry after success,
   // so that a previous success in the Pushgateway is not overwritten on failure.
   Gauge lastSuccess = Gauge.build()
       .name("my_batch_job_last_success_unixtime")
       .help("Last time my batch job succeeded, in unixtime.")
       .register(registry);
   lastSuccess.setToCurrentTime();
 } finally {
   durationTimer.setDuration();
   PushGateway pg = new PushGateway("127.0.0.1:9091");
   pg.pushAdd(registry, "my_batch_job");
 }
}

警报一个Pushgateway，如果需要的话，修改host和port

如果任务最近没有运行，请创建一个警报到Alertmanager。将以下内容添加到Pushgateway的Prometheus服务的记录规则中：
record rules ALERT MyBatchJobNotCompleted IF min(time() - my_batch_job_last_success_unixtime{job="my_batch_job"}) > 60 * 60 FOR 5m WITH { severity="page" } SUMMARY "MyBatchJob has not completed successfully in over an hour"