Casa k3s cluster

Table of Contents:

Master Node
- Master Node - proxmox vm
- Master Node - network configuration
minion01 - worker node
- Minion01 - proxmox vm
- Minion01 - k3s -setup

Disable swap:

swapoff -a
Edit /etc/fstab and comment out any swap entries:
# /swapfile none swap sw 0 0

Other Packages:

sudo apt update -y | sudo apt install curl btop -y

Master Node

Name	Value
NAME	casa.dev.lan
VLAN	casa
IP	192.168.14.9
OS	Debian GNU/Linux 12 (bookworm)
k3s	v1.34.3+k3s1 (48ffa7b6)
go	go1.24.11

Master Node - proxmox vm

hosted on surfacepro.

agent: 1
balloon: 0
boot: order=scsi0;ide2;net0
cores: 2
cpu: host
ide2: none,media=cdrom
memory: 2355
meta: creation-qemu=10.1.2,ctime=1762626497
name: casa
net0: virtio=BXX:XX:XX:XX:XX:XX,bridge=vmbr0,tag=xx
numa: 0
onboot: 1
ostype: l26
scsi0: local-lvm:vm-XXX-disk-0,iothread=1,size=24G,ssd=1
scsihw: virtio-scsi-single
smbios1: uuid=cxxxx-xxxx-xxxx-xxxx-xxxx
sockets: 1
usb0: host=1-1.1

Master Node - network configuration

ip a # check ethernet name

# removes automatic configuration as dhcp client
sed -i '/ens18/d' /etc/network/interfaces

cat <<EOF > /etc/network/interfaces.d/ens18
# my network configuration
auto ens18
iface ens18 inet static
  address 192.168.14.9/24
  gateway 192.168.0.1
EOF

cat <<EOF > /etc/resolv.conf       
domain dev.lan
search dev.lan. lan.
nameserver 192.168.14.1
EOF

curl -sfL https://get.k3s.io | sh -

Taint NoSchedule on master node:

kubectl taint nodes node-role.kubernetes.io/control-plane=:NoSchedule

kubectl taint nodes casa node-role.kubernetes.io/control-plane=:NoSchedule

minion01 - worker node

Minion01 - proxmox vm

hosted on gaia.

agent: 1
balloon: 0
boot: order=scsi0;ide2;net0
cores: 4
cpu: host
ide2: none,media=cdrom
memory: 4096
meta: creation-qemu=10.1.2,ctime=1763219351
name: casa-minion-01
net0: virtio=BXX:XX:XX:XX:XX:XX,bridge=vmbr0,tag=xx
numa: 0
onboot: 1
ostype: l26
scsi0: fastcore:vm-XXX-disk-0,iothread=1,size=8G,ssd=1
scsi1: fastcore:vm-XXX-disk-1,iothread=1,size=16G,ssd=1
scsihw: virtio-scsi-single
smbios1: xxxx-xxxx-xxxx-xxxx-xxxx
sockets: 1

Name	Value
NAME	minion01
VLAN	casa
IP	192.168.14.10
OS	Debian GNU/Linux 12 (bookworm)
k3s	v1.34.3+k3s1 (48ffa7b6)
go	go1.24.11

Minion01 - k3s -setup

# install k3s as agent / worker node
# execute on server to get token
# cat /var/lib/rancher/k3s/server/node-token

TOKEN="???"
curl -sfL https://get.k3s.io | INSTALL_K3S_EXEC="agent --data-dir /dataDisk/k3s --server https://casa.dev.lan:6443 --token ${TOKEN}" sh -s -

Change kubectl -n kube-system edit configmap local-path-config on kube-system to set path to provisioner.

  config.json: |-
    {
      "nodePathMap":[
      {
        "node":"DEFAULT_PATH_FOR_NON_LISTED_NODES",
        "paths":["/var/lib/rancher/k3s/storage"]
      },
      {
          "node":"casa-minion-01",
          "paths":["/dataDisk/k3s/storage"]
      }
      ]
    }

Set node labels:

kubectl label node casa-minion-01 role=worker-node

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