pve-rename-node.sh

#!/usr/bin/env bash

OLD_HOSTNAME=$(hostname)
NEW_HOSTNAME=$1

rename() {
  echo $OLD_HOSTNAME > /.old_nodename

  hostnamectl set-hostname "$NEW_HOSTNAME"
  # edit hostname file
  sed -i.bak "s/$OLD_HOSTNAME/$NEW_HOSTNAME/gi" /etc/hostname
  # edit hosts file
  sed -i.bak "s/$OLD_HOSTNAME/$NEW_HOSTNAME/gi" /etc/hosts
  # edit mailname if it exists
  [ -e "/etc/mailname" ] && sed -i.bak "s/$OLD_HOSTNAME/$NEW_HOSTNAME/gi" /etc/mailname
  # edit main.cf if it exists
  [ -e "/etc/postfix/main.cf" ] && sed -i.bak "s/$OLD_HOSTNAME/$NEW_HOSTNAME/gi" /etc/postfix/main.cf
  # copy config files to new node name
  cp "/var/lib/rrdcached/db/pve2-node/$OLD_HOSTNAME" "/var/lib/rrdcached/db/pve2-node/$NEW_HOSTNAME" -r
  cp "/var/lib/rrdcached/db/pve2-storage/$OLD_HOSTNAME" "/var/lib/rrdcached/db/pve2-storage/$NEW_HOSTNAME" -r
  cp "/var/lib/rrdcached/db/pve2-$OLD_HOSTNAME" "/var/lib/rrdcached/db/pve2-$NEW_HOSTNAME" -r
  cp "/etc/pve/nodes/$OLD_HOSTNAME" "/etc/pve/nodes/$NEW_HOSTNAME" -r
}

cleanup() {
  OLD_HOSTNAME=$(cat /.old_nodename)
  [ -z "$OLD_HOSTNAME" ] && exit 0
  rm -rf "/var/lib/rrdcached/db/pve2-node/$OLD_HOSTNAME"
  rm -rf "/var/lib/rrdcached/db/pve2-storage/$OLD_HOSTNAME"
  rm -rf "/var/lib/rrdcached/db/pve2-$OLD_HOSTNAME"
  rm -rf "/etc/pve/nodes/$OLD_HOSTNAME"
}


[ -e "/.old_nodename" ] && cleanup || rename