HomeLab – Deployment of an HA Kubernetes cluster (Part 2 – OS Initial deployment)

So let’s spin up 3 Ubuntu server 22.04 VMs on our vSphere. I recommend using the Ubuntu cloud image and a VM template. To find out how to create such a VM template follow this post. We are going to need it anyway later so save some time and create it now.

If you do not know how to deploy a VM through a template follow this procedure.

In order to have HA deploy the VMs in different ESXi servers

Now we have 3 servers. Mine are

K3s-CL01-01 on ESXi1 xxx.yyy.zzz.161/24
K3s-CL01-02 on ESXi0 xxx.yyy.zzz.162/24
K3s-CL01-03 on ESXi0 xxx.yyy.zzz.163/24

And the Load Balancer address will be the xxx.yyy.zzz.160/24

Of course xxx.yyy.zzz is your subnet

Right now the nodes have IP address that they got from DHCP. Login into them and change them to static by editing the yaml file like the example bellow

sudo nano /etc/netplan/50-cloud-init.yaml

Then apply the configuration

sudo netplan apply

If you so not want to use the default user (ubuntu) you can add now another one

sudo adduser myadmin

type in a password and the users data and after the user is created add him (or her) to the sudo group

sudo usermod -aG sudo myadmin

By default on the cloud images the ssh password authentication is disabled. So in order to ssh in edit the sshd_config

suso nano /etc/ssh/sshd_config

find the line

PasswordAuthentication no

and change the no to yes

PasswordAuthentication yes

Then restart the ssh service

systemctl restart ssh

Repeat for the rest of the VM servers

*Optional For the Worker nodes, install Ubuntu Server 22.04 . Official documentation for the PIs is here

K3s-CL01-04 xxx.yyy.zzz.164
K3s-CL01-05 xxx.yyy.zzz.165
K3s-CL01-06 xxx.yyy.zzz.166

HomeLab – Deployment of an HA Kubernetes

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