rancherOS/docs/os/configuration/resizing-device-partition/index.md

---

title: Resizing a Device Partition in RancherOS layout: os-default

---

Resizing a Device Partition

---

The resize_device cloud config option can be used to automatically extend the first partition to fill the size of it's device.

#cloud-config
rancher:
  resize_device: /dev/sda

This behavior is the default when launching RancherOS on AWS.