## config
The first partition (vfat).
```
/opt/monok8s/config        # Config for starting up the cluster, flags, upgrade state, node identity
```

## Rootfs A/B (readonly)
OS partition for A/B deployment


## data
```
/data/
├── var/                   # mounted to /var
├── var/lib/registry       # overlay to upperdir for /var/lib/registry
└── etc-upper/             # optional split if you want control
```