HAProxy is one of many pieces of software that Prometheus provides an integration with. Let's look at how to hook it in and use the built-in console template dashboard.
Reliable Insights
A blog on monitoring, scale and operational Sanity
Grafana recently added support for Prometheus. Let's take a look at how to get it up and running.
Cassandra is one of many Java-based systems that offers metrics via JMX. The JMX Exporter offers way to use these with Prometheus. By following these steps you can be up and running in under a minute!
Prometheus 0.16.1 was just released, and with it brings my addition of the irate function. This offers more responsive graphs and higher resolution dashboards.
Prometheus monitoring is usually against on long-lived daemons, but what if you've a batch job that you want to monitor?
Prometheus offers integrations with systems like PagerDuty, Email and Hipchat for alert notifications - but what if you want do something that's not supported out of the box? The Alertmanager's generic web hook has got you covered.
It's easy to get carried away by the power of labels with Prometheus. In the extreme this can overload your Prometheus server, such as if you create a time series for each of hundreds of thousands of users. Thankfully there's a way to deal with this without having to turn off monitoring or deploy a new version of your code.
CPU, RAM, disk and network usage are basic machine metrics you should be monitoring. This is easy with Prometheus and the later releases of Debian.
The most common way to learn about the expiry date of your website's SSL certificate is after it has expired. The blackbox exporter combined with Prometheus can let you know well in advance, letting you renew your certificate before users complain.
