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proxmox/proxmox-create-additional-lvm-thin.sh

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+#!/bin/bash
+
+# 2024.Dec kneutron
+
+# This creates an ADDITIONAL lvm-thin on another disk/partition besides the one the PVE installer creates
+# Avoids resizing and multiple LVM failures in non-RAID systems
+
+# xxx TODO EDITME
+declare -i lvmthins # integer
+if [ "$1" = "" ]; then
+  lvmthins=2
+else
+  lvmthins=$1
+fi
+# set to 3, etc if you already have more than 1
+
+# failexit.mrg
+# REF: https://sharats.me/posts/shell-script-best-practices/
+function failexit () {
+  echo '! Something failed! Code: '"$1 $2" >&2 # code (and optional description)
+  exit $1
+}
+
+if [ "$1" = "0" ] || [ "$1" -lt 2 ]; then
+  failexit 66 "Nice try - arg1 needs to be an integer number greater than 1"
+fi
+
+# xxx TODO EDITME
+target=/dev/nvme0n1p6
+
+echo '-- YOU NEED TO EDIT THIS SCRIPT BEFORE RUNNING IT --'
+echo "About to create lvm-thin number: $lvmthins on $target - Enter to continue or ^C"
+read -n 1
+
+pvcreate $target
+vgcreate -A y pvethin${lvmthins} $target
+# pvethin2
+
+#lvcreate -L 100G -n data pve
+lvcreate -A y  --readahead auto \
+ --name lvmthin${lvmthins}data --extent 99%FREE pvethin${lvmthins} || failexit 99 "Failed to lvcreate lvmthin${lvmthins}data on VG pvethin${lvmthins}"
+# lvmthin2 , pvethin2
+
+lvconvert --type thin-pool pvethin${lvmthins}/lvmthin${lvmthins}data || failexit 101 "Failed to convert pvethin${lvmthins}/lvmthin${lvmthins}data to lvm-thin"
+# pvethin2 , lvmthin2
+
+(pvs; vgs; lvs) |tee >/root/lvminfo.txt
+
+# backup lvm config for DR - see man page
+# In a default installation, each VG is backed up into a separate file bearing the name of the VG in the directory /etc/lvm/backup.
+# It may also be useful to regularly back up the files in /etc/lvm.
+vgcfgbackup
+
+echo "Define storage in pve GUI as lvm-thin2"