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Rich Burroughs

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May 18 • 8 tweets • 3 min read

Watching Alper Rifat Ulucinar talk about CRDs. #KubeCon

Some of the Crossplane providers for cloud platforms have hundreds of CRDs. #KubeCon

One of the issues they’ve run into with lots of CRDs installed is client side (kubectl) throttling. #KubeCon

This is related to the client-go discovery client, which uses a Token Bucket Rate Limiter (tblr). In k8s 1.23 there was a configuration bug that limited the queries per second, it was much lower than intended. #KubeCon

kubectl uses a CachedDiscoveryClient. The cache has a Time To Live. #KubeCon

The default TTL was increased to 6 hours in 1.24. #KubeCon

They also encountered problems with high CPU and memory utilization from the API server. #KubeCon

They did cpu profiling and found a lot of cpu time talking to the OpenAPI v2 and endpoint. Also a lot of time doing JSON marshalling/unmarshalling. #KubeCon

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Rich Burroughs

@richburroughs

May 20

@Divya_Mohan02

Last talk of the conference for me is @Divya_Mohan02, @SaiyamPathak, @kunalstwt and @coffeeartgirl talking about how to navigate the CNCF landscape. #KubeCon

@Divya_Mohan02

Cloud native as a paradigm involved because people wanted vendor agnostic infra, and a more declarative approach to deploying workloads. @Divya_Mohan02 #KubeCon

@coffeeartgirl

3 categories of projects in the CNCF: Sandbox, Incubating, and Graduated. Sandbox is early with lots of innovation. Incubating projects are being used in production by more people. Graduated projects are mature and stable. #KubeCon @coffeeartgirl

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Rich Burroughs

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May 20

@lizrice

Next up is @lizrice talking about Cilium :) #KubeCon

Specifically about Cilium’s service mesh :)

Liz started off asking who is tired and a lot of hands went up, including hers 😂 #KubeCon

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Rich Burroughs

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May 20

@breakawaybilly

Watching @breakawaybilly talk about composability next :) #KubeCon

What is compound interest for software? Composability. #KubeCon

With the cloud native ecosystem we can select and assemble from the projects on the landscape. #KubeCon

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Rich Burroughs

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May 20

@urlichsanais

All the cool kids are at @urlichsanais and @raesene’s talk. #KubeCon

Love you, security nerds ❤️ #KubeCon

@raesene

Oh I didn’t know that @raesene works on the CIS benchmarks for both Docker and Kubernetes. #KubeCon

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Rich Burroughs

@richburroughs

May 20

@LukasGentele

During my chat last night with @LukasGentele and @fabiankramm, Lukas mentioned what a risk it was for me to join @loft_sh when I did. At that time it was mainly Lukas and Fabian and our designer (who is really rad).

My instinct at the time had actually been to join a very large company. I’d been at three early stage companies in a row and felt like I needed a break. I had never heard of Loft Labs and knew nothing about the founders.

But when I looked at the product I was very impressed. I’d been hearing people in the Kubernetes community complain about multi-tenancy pain for years. Virtual clusters were such a new approach and very smart I thought. (At that point they were in the commercial product only.)

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