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proxmox/proxmox-SHUTDOWN-RUNNING-VMS.sh

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+#!/bin/bash
+
+# 2024.feb kneutron
+# REF: https://forum.proxmox.com/threads/shutting-down-all-vm-ct-in-parallel.112519/
+
+[ $(which parallel |wc -l) -gt 0 ] || apt-get install -y parallel
+
+VM_LIST=/dev/shm/vmlist.in
+
+# 1         2 3         
+# processor : 7
+lastcpu=$(grep processor /proc/cpuinfo |tail -n 1 |awk '{print $3}')
+[ $lastcpu -gt 1 ] && let lastcpu=$lastcpu-1
+
+[ -e "$VM_LIST" ] && rm -f "$VM_LIST" # delete the old file ONLY IF it exists
+for vmid in $(qm list |grep running |awk '{print $1}'); do
+#  echo "qm shutdown $vmid" >>"$VM_LIST"
+  echo "qm suspend $vmid --todisk" >>"$VM_LIST"
+done
+
+echo "$(date) - HIBER ALL VMS using $lastcpu threads"
+time cat "$VM_LIST" |parallel -j $lastcpu --progress
+date
+
+exit;