Cloud & Networking
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You're reading from  Mastering Prometheus

Product typeBook
Published inApr 2024
PublisherPackt
ISBN-139781805125662
Edition1st Edition
Concepts
DevOps
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Author (1)
William Hegedus
William Hegedus
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William Hegedus

William Hegedus has worked in tech for over a decade in a variety of roles, culminating in site reliability engineering. He developed a keen interest in Prometheus and observability technologies during his time managing a 24/7 NOC environment and eventually became the first SRE at Linode, one of the foremost independent cloud providers. Linode was acquired by Akamai Technologies in 2022, and now Will manages a team of SREs focused on building the internal observability platform for Akamai's Connected Cloud. His team is responsible for a global fleet of Prometheus servers spanning over two dozen data centers and ingesting millions of data points every second, in addition to operating a suite of other observability tools. Will is an open source advocate and contributor who has contributed code to Prometheus, Thanos, and many other CNCF projects related to Kubernetes and observability. He lives in central Virginia with his wonderful wife, four kids, three cats, two dogs, and a bearded dragon.
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Default collectors

At the time of writing, there are a whopping 49 different collectors that are enabled by default in the Node Exporter. Many of them are either niche (such as dmi) or dependent on your infrastructure (such as filesystem collectors for xfs and zfs). Rather than go through all of them, we’ll take a look at some of the most useful ones to see what info they provide and why you would care about it.

conntrack

The conntrack collector exposes metrics related to the Linux kernel’s netfilter connection tracking subsystem. This is used to keep track of connections established to your server and can cause issues when the table it uses becomes full.

Two commonly used metrics from this collector are as follows:

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Mastering Prometheus
Published in: Apr 2024Publisher: PacktISBN-13: 9781805125662
© 2024 Packt Publishing Limited All Rights Reserved

Author (1)

author image
William Hegedus

William Hegedus has worked in tech for over a decade in a variety of roles, culminating in site reliability engineering. He developed a keen interest in Prometheus and observability technologies during his time managing a 24/7 NOC environment and eventually became the first SRE at Linode, one of the foremost independent cloud providers. Linode was acquired by Akamai Technologies in 2022, and now Will manages a team of SREs focused on building the internal observability platform for Akamai's Connected Cloud. His team is responsible for a global fleet of Prometheus servers spanning over two dozen data centers and ingesting millions of data points every second, in addition to operating a suite of other observability tools. Will is an open source advocate and contributor who has contributed code to Prometheus, Thanos, and many other CNCF projects related to Kubernetes and observability. He lives in central Virginia with his wonderful wife, four kids, three cats, two dogs, and a bearded dragon.
Read more about William Hegedus

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Metric

Description

node_nf_conntrack_entries

Current number of entries in the connection tracking table