# Casa k3s cluster

**Table of Contents:**

- [Nodes](#nodes)
  - [Master Node](#master-node)
  - [worker node](#worker-node)

## Nodes

**Setup user for ssh access:**

``` bash
apt install sudo
usermod -aG sudo mf
```

**Disable swap:**

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

**Other Packages:**

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

### Master Node

- debian 12
- 2g ram
- 24Gb disk

``` bash
ip a # check ethernet name

# removes automatic vonfiguration 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
```

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

### worker node

- debian 12
- 4g ram
- 8Gb OS disk
- 16Gb data disk

``` bash
# execute on server to get token
cat /var/lib/rancher/k3s/server/node-token
```

**Setup worker node:**

``` bash
# install k3s as agent / worker node
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 -
```

**Move default k3s folder:**

``` bash
apt install rsync
sudo systemctl stop k3s-agent
sudo rsync -a /var/lib/rancher/k3s/ /dataDisk/k3s/
```

Execute install k3s default update script with --data-dir /dataDisk/k3s argument.

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

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

``` bash
rm -rf /var/lib/rancher/k3s
```

**Set node labels:**

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