April 22, 2022

Kubernetes VCluster for "Clusters in Namespaces"

1 hour 5 minutes

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Bret is joined by Lukas Gentele and Rich Burroughs of Loft Labs to talk about vcluster, a Kubernetes distribution that can run inside an existing cluster namespace, aka "clusters in clusters." Lukas is the CEO of Loft Labs and Rich is their Senior Developer Advocate.

VCluster is quite a universal tool for running fully-fledged Kubernetes clusters for dev and test environments and even potentially in production. In this episode, Lukas and Rich break down a ton of ways vcluster is currently being used and where they see it going in the future. Streamed live on YouTube on March 10, 2022.

Unedited live recording of the complete show on YouTube (Ep #162). Includes demos.

★Topic Links★
Loft Labs
VCluster

★Lukas Gentele and Rich Burroughs★
Lukas Gentele on Twitter
Rich Burroughs on Twitter

★Join my Community★
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Chat with us on our Discord Server Vital DevOps

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(00:00) - DDT MAIN

(00:03) - Template intro

(00:53) - Bret custom intro

(02:58) - Main show recording

(03:00) - Show starts

(03:05) - Introducing the guests

(04:01) - What we're talking about today

(04:15) - Their background

(04:26) - Lukas

(05:43) - Loft Labs Elevator Pitch

(07:57) - Rich

(09:14) - Where did the name Loft come from?

(09:44) - Say hi to the regulars in chat

(10:09) - VCluster

(10:24) - VCluster Origin Story

(12:57) - VCluster is open source

(13:25) - Is VCluster in CNCF?

(14:34) - Q: How does VCluster compare to Kubernetes hierarchy old namespaces?

(17:53) - Q: How do you deal with system updates and upgrades?

(20:19) - Running not only your own distro

(21:39) - Q: Running production workloads in vcluster

(24:25) - Less tolerant of an IT overlord

(25:53) - The Netflix model

(26:21) - Getting out of the developers' way

(28:08) - Namespaces are not clusters

(29:15) - Demo: Running control plane inside another cluster

(32:40) - Bret's Demo Intro

(33:11) - Demo ended?

(36:14) - VCluster Inception

(37:22) - Q: Do workloads persist on restart?

(38:44) - Q: How does persistence work on storage?

(40:15) - Q: Can VCluster run VCluster?

(40:27) - Q: Is there a resource name size limit?

(41:52) - Q: Does VCluster create virtual nodes?

(46:06) - Q: Quotas or limits or shared memory CPU

(48:38) - Q: VClusters inside cloud systems

(49:10) - Q: Can virtual nodes have diff. characteristics?

(50:28) - Q: Where do you store persistent data?

(51:00) - Q: How do you dry run commands with server and client?

(51:10) - Q: How well are pods isolated?

(53:33) - Q: Access data in nginx pod?

(54:24) - Isolated mode feature coming soon

(56:17) - Q: What level do tolerations get forced?

(58:52) - Q: How do vcluster pods communicate with prime cluster pods?

(01:02:50) - Q: Repeated question?

(01:03:43) - Show winding down

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By Bret Fisher

4.6

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