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Giulia Guizzardi
11/08/2022, 4:25 PMAfter a very suspicious Zoom servers problem đ¶âđ«ïž last week, the rescheduled webinar âDestroy latency and kill pods: how not to manage your K8s resourcesâ with @Natan Yellin is finally happening today.
Natan is going to list some of the most common misconceptions about Kubernetes resource management and how not to get them wrong. He'll do his best to destroy some clusters and performance along the way.
Be sure to tune in!
November 8, 7 PM CET, 1 PM CDT
https://www.meetup.com/platform-engineers-atx-online/events/289541044/
Question from Natan on YouTube: what is the best approach to run a database? As a pod? Or inside a machine? Or some paas service?
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Natan Yellin
11/08/2022, 7:06 PMPaaS is easiest if it works, but sometimes thatâs not viable, in which case use a stateful set or an appropriate Kubernetes Operator
Thereâs a misconception that Kubernetes isnât for stateful sets, despite the fact that large companies do run stateful sets on kubernetes
If youâre running Prometheus on Kubernetes, for example, youâre already running a stateful set which is storing all your metrics!
To give a concrete example of the tradeoffs, weâre using a postgres as a service for the robusta.dev cloud, but for our on-prem customers we deploy a postgres instance inside their clusters.
So there is no one solution! Depends on the scenario
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Dave Thompson
11/08/2022, 7:59 PMThanks @Natan Yellin, that was a great overview!
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Natan Yellin
11/08/2022, 8:01 PMMy pleasure, I hope it helped!
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Dave Thompson
11/11/2022, 5:53 PM@Natan Yellin have you done testing around limits with different kernel versions? It looks like there have been several CFS kernel changes over the past few years, with some changes correlated with Kubernetes issues.
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Natan Yellin
11/12/2022, 7:36 PM@Dave Thompson I havenât tested enough, but afaik the fundamental issue remains. There was a rather nasty CFS bug once, but the issue with limits occurs regardless.
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