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AWS have recently added the feature natively [2], so once that version of the SDK is in use by all your pods you won't need Kiam any more.
[1] https://github.com/uswitch/kiam/issues/191 [2] https://aws.amazon.com/blogs/opensource/introducing-fine-gra...
"Once this change was applied, requests started being served without involving the AWS Metadata service and returned to an even lower latency than in EC2." Title should be: My configuration made my latency 10x higher.
It would be more accurate to criticize AWS's Kubernetes support. Both KIAM and the AWS Java SDK are specific to AWS.
Earlier quoted context omitted.
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
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.
> 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
It is relevant though as k8s makes everything more complicated so you have to deal with stuff like this. Also if it was a brand new app theyd maybe not notice the problem in the first place.
It’s sort of like cursing Microsoft every time an application crashes... because it’s running on windows.
> DNS resolution is indeed a bit slower in our containers (the explanation is interesting, I will leave that for another post).
I would like to see this expanded upon or hear if anyone else has suffered similar.
And this is why I find DevOps work more interesting than programming. System integration is just endlessly challenging. I always enjoy reading a well-documented integration debugging session!