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Blending complex systems made my latency 10x higher

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Re: Blending complex systems made my latency 10x higher

#11

Post by erhk »

NightMKoder wrote: post #7
KurtKoolbrain wrote: post #3

Earlier quoted context omitted.

hah. So, title should read: 'Using default Kubernetes config settings made my latency 10x higher'

I might even go further - kiam is not a standard deployment supported by the kubernetes project like the api server or the scheduler or the autoscaler. See https://github.com/uswitch/kiam That said it is a very common deployment strategy in ec2 to run kiam or kube2iam. I wish the kube core teams took over the development of an aws iam role service since issues like bad defaults would be solved much quicker. Your only…

I think that responsibility falls on Amazon actually

Re: Blending complex systems made my latency 10x higher

#13

Post by bavell »

Very misleading title, was hoping for a more substantive read. Kubernetes itself wasn't causing latency issues, it was some config in their auth service and AWS environment.

In the takeaways section, the author blames the issue on merging together complicated software systems. While absolutely true, this isn't specific to k8s at all. To specifically call out k8s as the reason for latency spiking is misleading.

Re: Blending complex systems made my latency 10x higher

#14

Post by manigandham »

acdha wrote: post #10
yskchu wrote: post #2

> Kubernetes made my latency 10x higher The title is a bit misleading, kub didn't cause the 10x latency - also latency was lower after they fixed their issues TL;DR version - Migrate from EC2 to Kub; due to some default settings in Kiam & AWS Java SDK, latency of application increased, fixed after reconfiguration and kub latency lower than EC2

In other words, switching to Kubernetes _did_ make their latency higher — otherwise they wouldn't have needed to reconfigure anything, would they? If you want to help k8s, try starting a pull-request to make the defaults better rather than playing spin-doctor telling people that well-documented problems don't exist.

It wasn’t. It was KIAM and the Java SDK, neither of which are part of K8S.

Re: Blending complex systems made my latency 10x higher

#17

Post by rootlocus »

bavell wrote: post #13

Very misleading title, was hoping for a more substantive read. Kubernetes itself wasn't causing latency issues, it was some config in their auth service and AWS environment. In the takeaways section, the author blames the issue on merging together complicated software systems. While absolutely true, this isn't specific to k8s at all. To specifically call out k8s as the reason for latency spiking is misleading.

If k8s is a complicated software system, then it's specific to k8s (among other systems).

Re: Blending complex systems made my latency 10x higher

#18

Post by bavell »

rootlocus wrote: post #17
bavell wrote: post #13

Very misleading title, was hoping for a more substantive read. Kubernetes itself wasn't causing latency issues, it was some config in their auth service and AWS environment. In the takeaways section, the author blames the issue on merging together complicated software systems. While absolutely true, this isn't specific to k8s at all. To specifically call out k8s as the reason for latency spiking is misleading.

If k8s is a complicated software system, then it's specific to k8s (among other systems).

Specific to k8s would mean it only affects k8s, which is false. It affects a large group of systems, of which k8s is one.

Better (more accurate) title would have been: "Merging complicated software systems made my latency 10x higher"

Re: Blending complex systems made my latency 10x higher

#20

Post by sorum »

bavell wrote: post #18
rootlocus wrote: post #17

Earlier quoted context omitted.

If k8s is a complicated software system, then it's specific to k8s (among other systems).

Specific to k8s would mean it only affects k8s, which is false. It affects a large group of systems, of which k8s is one. Better (more accurate) title would have been: "Merging complicated software systems made my latency 10x higher"

But with that title the author wouldn't have gotten those juicy clicks
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