embiggen-disk

README

embiggen-disk

The embiggen-disk tool live-resizes a filesystem after first live-resizing any necessary layers below it: an optional LVM LV and PV, and an MBR or GPT partition table.

Example

# embiggen-disk /
Changes made:
  * partition /dev/sda3: before: 8442546176 sectors, after: 8444643328 sectors
  * LVM PV /dev/sda3: before: sectors=8442544128, after: sectors=8444641280
  * LVM LV /dev/mapper/debvg-root: before: sectors=8442544128, after: sectors=8444641280
  * ext4 filesystem at /: before: 1038833256 blocks, after: 1039091312 blocks

Then again:

# embiggen-disk /
No changes made.

Installing

$ go get github.com/google/embiggen-disk

Requirements

• Go 1.7+
• Linux 3.6+ (for BLKPG_RESIZE_PARTITION)

It's only been tested on 64-bit x86 Linux ("amd64"). It should work on other Linux architectures.

Disclaimer

This is not an officially supported Google product.

Audit the code and/or snapshot your disk before use if you're worried about losing data.

Documentation

Overview

The embiggen-disk command live resizes a filesystem and LVM objects and partition tables as needed. It's useful within a VM guest to make its filesystem bigger when the hypervisor live resizes the underlying block device.