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Marshall-Hallenbeck/extend_disk.sh

Created March 11, 2026 19:49
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dynamic online disk extension
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extend_disk.sh
#!/bin/bash
# for ROOT
LV=$(findmnt -no SOURCE /)
VG=$(lvs --noheadings -o vg_name "$LV" | xargs)
PV=$(pvs --noheadings -o pv_name --select "vg_name=$VG" | xargs)
DISK=/dev/$(lsblk -no PKNAME "$PV")
sudo sh -c "echo 1 > /sys/class/block/${DISK##*/}/device/rescan"
sudo cfdisk "$DISK"
sudo pvresize "$PV"
sudo lvextend -l +100%FREE -r "$LV"
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