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MicroK8s – Low-ops, minimal Kubernetes, for cloud, clusters, Edge and IoT

microk8s.io

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Re: MicroK8s – Low-ops, minimal Kubernetes, for cloud, clusters, Edge and IoT

#41

Post by pixelmonkey »

rcarmo wrote: post #20
kalev wrote: post #18

Having a RaspberryPi laying idle in a drawer somewhere, I wonder if others have installed microk8s or k3s on it. What kind of workloads are you running on it? Whoever has OpenFaas installed on your rpi, what type of functions are you running?

I mostly gave up on containers on Pis due to the overhead (disk space, deployment hassles with private registries, etc.). Built my own mini-Heroku and run all my services/functions there: https://github.com/piku

+1 to piku. I use it on a homelab server (not a Raspberry Pi) and just love how simple it is. It sets up a Python deploy environment for web apps that is exactly how I'd personally hand-configure the same in production (nginx, uwsgi, git). The best part of the project is that the entire thing is 1,000 lines of open source and readable Python code, so there's truly no magic whatsoever.

Re: MicroK8s – Low-ops, minimal Kubernetes, for cloud, clusters, Edge and IoT

#42

Post by professor_v »

gnfargbl wrote: post #36

Plain k8s has a fearsome reputation as being complex to deploy, which I don't think is quite deserved. It isn't totally straightforward, but the documentation does tend to make it sound a bit worse than it actually is. I run a couple of small clusters and my Ansible script for installing them is pretty much: * Set up the base system. Set up firewall. Add k8s repo. Keep back kubelet & kubeadm. * Install and configure…

I remember about 5 years ago I tried to deploy it on CoreOS using the available documentation and literally couldn't get it working.

I haven't done a manual deployment since. I hope it got significantly better and I may be an idiot but the reputation isn't fully undeserved.

The problem back then was also that this was usually the first thing you had to do to try it out. Doing a complicated deployment without knowing much about it doesn't make it any easier.

Re: MicroK8s – Low-ops, minimal Kubernetes, for cloud, clusters, Edge and IoT

#44

Post by crb »

holografix wrote: post #17

Another vote for K3s. Easy to set up on a Pi cluster. Pity Istio doesn’t offer an ARM build

There are unofficial builds at https://github.com/querycap/istio, and it seems like it's got to a point (with Envoy now supporting arm64) that it could be upstreamed. I'll keep track of it for you!

- istio SC member

Re: MicroK8s – Low-ops, minimal Kubernetes, for cloud, clusters, Edge and IoT

#45

Post by m1ghtym0 »

daitangio wrote: post #32
Fiahil wrote: post #23

Earlier quoted context omitted.

I thought minikibe would not cluster multiple machine ?

Yes, it seems not possibile. You can EMULATE a multi mode cluster but inside a big host machine. Minikube is very effective on my huble opinion to STUDY K8s becauese it is always strong aligned with K8s releases. I do not think minikube is a good choice for production but hey, I could be wrong... someone want to share any experience?

Yes, definitely not production. Using them (MicroK8s, Minikube, K3s) for local testing mostly.

Re: MicroK8s – Low-ops, minimal Kubernetes, for cloud, clusters, Edge and IoT

#48

Post by baybal2 »

I see nothing of particular utility to iot here. I will call that marketing.

After shipping a number of MQTT backends for deployments of few million devices each, I'd say the most troublesome part was getting the anycast network setup, uplinks, routing, and getting the "messaging CDN" second to it.

It's very hard to do without having an own ASN in which you have complete freedom.

Even in the case of 8 million shipped units fire/burglary alarm client, with ~4M constantly on units, which all have to send frequent pings to signal that they are online, I haven't seen any need in any kind of sophisticated clustering.

Re: MicroK8s – Low-ops, minimal Kubernetes, for cloud, clusters, Edge and IoT

#49

Post by cyberpunk »

ofrzeta wrote: post #40
cyberpunk wrote: post #14

Earlier quoted context omitted.

Sure, if it works, upgrades are somewhat fraught though (I mean, upgrading a 20 node cluster is an hour long ansible run, or it was when we were using it) We switched to rke, it’s much better.

An hour to upgrade a 20 node cluster doesn't seem unreasonable for me - when you are doing a graceful upgrade that includes moving workloads between nodes. I don't know anything about rke. Might be interesting but it seems different enough from upstream Kubernetes that you have to learn new things. Seems to me a bit similar to Openshift 4 where the cluster manages the underlying machines.

RKE is minutes on the same cluster, and a one click rollback too. It’s just K8s packaged as containers really.

Re: MicroK8s – Low-ops, minimal Kubernetes, for cloud, clusters, Edge and IoT

#50

Post by traspler »

kiney wrote: post #37

How is persistent storage handled on microk8s (or k3s)?

If you want more than just local disk (directory/path on the node the pods currently reside on) you will have to deploy your own storage provider to handle PVCs (on k3s at least). According to Microk8s docs, it's the same there.
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