April 2024
Intermediate to advanced
262 pages
6h 12m
English
Content preview from Linkerd: Up and Running
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Chapter 15. Debugging Linkerd
If you’ve come this far, you understand how valuable a tool Linkerd can be for a platform to provide. It secures your apps, provides powerful insights into those applications, and can account for underlying application and network issues by making your connections more reliable. In this chapter, we’re going to look at what to do when you need to troubleshoot Linkerd itself.
In all cases, the first step when diagnosing an issue with Linkerd is to use
the Linkerd CLI’s built-in health checking tool by running linkerd check,
as we discussed in more detail in Chapter 6. linkerd check is a
very quick way to pinpoint many of the most common issues with Linkerd
installations; for example, it can immediately diagnose expired certificates,
which is the most common issue that causes Linkerd outages in practice.
Diagnosing Data Plane Issues
Linkerd is somewhat famous for not requiring a ton of hands-on work with the data plane; however, it’s still useful to be able to do some basic troubleshooting. Many proxy issues end up involving fairly similar sets of solutions.
“Common” Linkerd Data Plane Failures
While Linkerd is generally a fault-tolerant service mesh, there are a few conditions that we see arise more than others. Knowing how to tackle these can be extremely helpful.
Pods failing to start
If you run into a situation where injected Pods are failing to start, the first step will be to identify exactly where the failure is occurring. This is where the ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.