Setup:

• openssh server
• sudo, python3 packages
• one user with ssh-key and sudo without password

k1.0x300.de - alpine eth0 dhcp, eth1 10.10.10.1 / netmask 255.255.255.0 no gateway

k2.0x300.de - alpine eth0 dhcp, eth1 10.10.10.2 / netmask 255.255.255.0 no gateway

strg.0x300.de - alpine (controller) (optional) eth0 dhcp, eth1 10.10.10.253 / netmask 255.255.255.0