Diagram

Network Diagram

+--------------------------------+         +--------------------------------+
|       Physical Machine 1       |         |       Physical Machine 2       |
|                                |         |                                |
|  +---------+   +---------+     |         |  +---------+   +---------+     |
|  |  VM1    |   |  VM2    |     |         |  |  VM3    |   |  VM4    |     |
|  | (Master)|   | (Worker)|     |         |  | (Worker)|   | (Worker)|     |
|  +---------+   +---------+     |         |  +---------+   +---------+     |
|         | NFS (/srv/nfs)       |         |                                |
+---------|----------------------+         +--------------------------------+
          |                                          |
          +------------------------------------------+
                             |
                             |  Local Network (IPv4)
                             |
                    +-------------------+
                    | Kubernetes Cluster|
                    |   (k3s)           |
                    |   - Master: VM1   |
                    |   - Workers: VM2, |
                    |              VM3, |
                    |              VM4  |
                    +-------------------+
                             |
                             |
                    +-------------------+
                    | Applications      |
                    | - Nextcloud       |
                    | - Vaultwarden     |
                    | - Paperless-ngx   |
                    | - Bookstack       |
                    |   (Deployed on    |
                    |    worker nodes)  |
                    +-------------------+

Physical Machine 1: Hosts VMs (VM1, VM2) and the pre-existing NFS server.
Physical Machine 2: Hosts VMs (VM3, VM4).
VMs: Run Alpine Linux and form the cluster.
NFS Server: Pre-existing, provides centralized persistent storage over IPv4.
Kubernetes Cluster: Manages apps and storage.