Shrink rootfs for container under Proxmox

proxmox-shrink-pct-rootfs

#!/bin/sh -e

# Based on https://serverfault.com/a/787380/228027

CT="123"
DIR="/$VE-$(date +%Y-%m-%d-%H%M)"
NEWSIZE="100G"
UNPRIV="1"   # ..missed by dump/restore => should be selected explicitly

mkdir -p   "$DIR"
pct stop    "$CT"
vzdump "$CT" --dumpdir "$DIR" -compress lzo
pct destroy "$CT"
pct restore "$CT" "$DIR/vzdump-lxc-$CT"-*.tar.lzo --rootfs local:"$CT",size="$NEWSIZE" --unprivileged "$UNPRIV"
pct start   "$CT"

: rm -rf "$DIR"

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