Raspberry Pi Cluster Ep 3 - Installing Kubernetes (K3s) on the Turing Pi

In this video, I show you how to find the new Raspberry Pis on your network and connect to them with SSH. Then I explain Kubernetes and the many different flavors of Kubernetes you could install on a Raspberry Pi.

Finally, I set up Rancher's K3s lightweight Kubernetes distribution on the Turing Pi cluster, make sure the cluster is working correctly, then show you how to shut down the cluster safely.

Contents:

00:00 - Intro
01:08 - Use nmap to find your Pis
04:01 - What's Kubernetes?
05:38 - Many ways to install K8s
07:49 - Installing K3s
10:57 - Running the k3s-ansible playbook
13:53 - Connecting to the cluster with kubectl
15:51 - Shut down all the Pis with Ansible
16:54 - Outtro

Mentioned in this video:

[moracabanas]

Jeff: "IP adresses are gold because they usually don't change"
main node: "CRIES IN DHCP"

Great clustering and provisioning 101 the best Kubernetes intro I have ever watch. Keep your very detailed work as some users cannot afford any skipping on the process and almost all tutorials skip things. I love it!

[JoeKubinec]

I aspire to be like you some day... but I'm well into my 60's now and am not sure that I'll make it! I think that I'll have to live vicariously through your vid's. Thanks for this awesome work - it's very impressive to me.

[WalrusPug]

"IP Addresses don't change" ... aaaarrrggghhh, nooo. They do. And at the worst possible time as well... Use names and have a DNS setup within the systems/networks you use... D:

[StefanPetter]

Awesome video! Just a small tip: IP addresses will change if your cluster is offline for too long, because of the DHCP leasetime of the IP addresses. Soms options to prevent this:
- Use the host name. Your DNS server will resolve the name, even if the IP address changes.
- Configure static DHCP leases. This will make sure that the PI will always receive the same IP address by binding the MAC address of the pi to an IP address
- Configure static IP addresses on the pi's. Make sure the addresses do not overlap with your DHCP scope

Keep up the good work! :)

[TheAndade]

Another cliffhanger! I want the knowledge now!

[deefdragon]

I feel that you did a diservice on the IP vs Host-name thing. Different environments will have different requirements. Given your hardware is unlikely to change, host-names might be better. If you are in an environment where you have control over DHCP, IPs may be preferable. I wish you had covered both in this example.

[leehull]

I can't wait for pi 4 modules.. but looking forward for this to go out

[TheVeggieBiker]

Pi modules 3+ was on sale so probably in month they will release module 4 and definitely will do cluster with module pi 4 as always wanted to do cluster for my website :) great work waiting for new episodes about clusters with modules

[jfanreva]

8:23 LOTR moment = Ansible - One app to rule them all. One app to find them. One app to bring them all, and in the darkness bind them.... Lol!

[KarellSteMarie]

Very good video, as the CTO of a software company this resonates with me a lot and am seriously considering pushing your videos to my DevOps team - please continue to make these valuable videos available

[Samuel.Mwangi]

Thanks for the great content as always. And the amazing amount of effort you put into it. 👏👏👏👏👌

[ro]

What a great video series, excited for the next one!

[markhaus]

Can’t wait till we get Pi 4 compute modules. Then these 7 become pretty legit in terms of compute resources

Usually I fast forward into these kind of videos, but somehow I've watched from beginning to end. Very nice presentation.
(Okay, I've cheated and used 1.5x. I know, I'm sorry.)

[armwrestling_nerd]

For ssh/scp you can edit ~/.ssh/config
example content ( so you just need to enter "ssh Turing-master" )
Host Turing-master
User pirate
Hostname 10.0.100.163

[laffinkippah]

I'm so considering getting a Turing Pi once it's available for purchase.

[aurelf]

For me the only useful thing i learn from your video is how to use nmap in lan via ssh (nmap -sn 192.168.1.1/255) .thank you !

[WorldOfZeroDevelopment]

This is a great overview of Kubernetes on Pi's and I love the use of Ansible to help you automate it instead of brute forcing this from a shell. You cover things with enough detail to know where to look for more info, but don't go so in depth that we're watching a 2 hour video. I could learn from that. 😅

[denverag]

Wondering when the pi4 will come in compute flavor, but I'm probably not going to consider pi until i can get an 8 core, with at least 2GB ram

[drdiesel]

Wish they made one of those with 32 or 64 nodes, rackmount. Thanks for the video.