growlvmpart

Quick and dirty python script to automatically detecting disk resize, expand lvm partitions and fs.

Working only with one scenario: you need to grow FS if free space less then barrier, FS is on LV, PV is in MBR/GPT(not tested) partition, lying on hypervisor's disk that can be resized online.

Not well tested. May be buggy.

Requirements

• python2
• lvm2
• parted
• util-linux
• your FS utils

Usage

./growlvmpart.py --path <mount point> --min <minimal free space> [--max <maximum free space>]

For example:

./growlvmpart.py --path /var/lib/docker --min 1500m --max 4g

Size in bytes. You can use some units [bkmgt].

Algorithm

1. Exit if free space on FS greater then <minimum free space>
2. Rescan SCSI devices and hosts
3. Resize underlying partition
4. Resize PV
5. Resize LV and FS to size <used space> + <maximum free space>