today's howtos
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Some thoughts on Prometheus Alertmanager's alert reminders
Translated, this is how often you get a reminder about an alert (or a group of them) that is still active (and otherwise unchanged; if something changes in the group of alerts, that's a different configuration setting).
We set our repeat_interval to 24 hours, and we recently came back from a holiday break where an alert triggered on December 28th and stayed on until we returned and fixed it, resulting in reminder email on the 29th, the 30th, and so on, none of which we were dealing with over the break. This has given me an opportunity to think about our setting and about alert reminders in general.
The first question to ask yourself is whether an alert reminder is ever going to be useful. In some places the answer is probably 'no', for example if you have a dashboard of active alerts that people look at all the time. Otherwise, if an alert reminder is useful, you want to ask questions like what is it useful for, to who, and when. The answers for a 24/7 operations team with shift changes every six hours might be quite different than for a small group of university system administrators who only work regular office hours.
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An Introduction to Linux Capabilities - Earthly Blog
In Linux, capabilities are a way to assign specific privileges to a running process. They allow us to have more fine-grained control over the privileges that processes have on a Linux system.
In this article, you’ll learn about capabilities in Linux. You’ll also learn how you can use capabilities in the context of Docker containers and Kubernetes.
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How Do You Use Ubuntu Core on a Raspberry Pi?
Ubuntu is a popular Linux distro that offers stability, multiple flavors with graphical interfaces, and a community of enthusiasts to help support each other. If you strip away the bells and whistles from Ubuntu, what remains is Ubuntu Core.
This is an OS that even the Raspberry Pi 2 is capable of running, not to mention later models such as the Pi 3 and 4. Pairing these two household names together will provide you with an outcome that is stable, frequently maintained, and well-supported for years to come.
Let's dive into the possibilities that Ubuntu Core and Raspberry Pi are capable of together.