create_template

create_template.sh

#!/bin/bash

set -xeu

export IMGID=9007
export BUILD_DAY="20240102-1614"
export BASE_IMG="debian-12-genericcloud-amd64-${BUILD_DAY}.qcow2"
export IMG="debian-12-genericcloud-amd64-${IMGID}.qcow2"
export STORAGEID="local"

if [ ! -f "${BASE_IMG}" ];then
  wget https://cloud.debian.org/images/cloud/bookworm/${BUILD_DAY}/${BASE_IMG}
fi

if [ ! -f "${IMG}" ];then
  cp -f "${BASE_IMG}" "${IMG}"
fi

# if [ ! -f "/mnt/tmp" ];then
#  mkdir /mnt/tmp
# fi

# prepare mounts
guestmount -a ${IMG} -m /dev/sda1 /mnt/tmp/
mount --bind /dev/ /mnt/tmp/dev/
mount --bind /proc/ /mnt/tmp/proc/

# add dns server
rm /mnt/tmp/etc/resolv.conf
echo "nameserver 1.1.1.1" > /mnt/tmp/etc/resolv.conf
echo "nameserver 8.8.4.4" >> /mnt/tmp/etc/resolv.conf

echo "151.101.246.132 deb.debian.org" >> /mnt/tmp/etc/hosts

# install desired apps
chroot /mnt/tmp /bin/bash -c "apt-get update"
chroot /mnt/tmp /bin/bash -c "DEBIAN_FRONTEND=noninteractive apt-get install -y net-tools curl qemu-guest-agent nfs-common open-iscsi lsscsi sg3-utils multipath-tools scsitools"

# https://www.electrictoolbox.com/sshd-hostname-lookups/
sed -i 's:#UseDNS no:UseDNS no:' /mnt/tmp/etc/ssh/sshd_config

sed -i '/package-update-upgrade-install/d' /mnt/tmp/etc/cloud/cloud.cfg

cat > /mnt/tmp/etc/cloud/cloud.cfg.d/99_custom.cfg << '__EOF__'
#cloud-config
# Install additional packages on first boot
#
# Default: none
#
# if packages are specified, this apt_update will be set to true
#
# packages may be supplied as a single package name or as a list
# with the format [<package>, <version>] wherein the specifc
# package version will be installed.
#packages:
# - qemu-guest-agent
# - nfs-common
ntp:
  enabled: true
datasource_list: [ NoCloud, ConfigDrive ]
__EOF__

cat > /mnt/tmp/etc/multipath.conf << '__EOF__'
defaults {
    user_friendly_names yes
    find_multipaths yes
}
__EOF__

# enable services
chroot /mnt/tmp systemctl enable open-iscsi.service || true
chroot /mnt/tmp systemctl enable multipath-tools.service || true

# copy ssh keys
cp -a --force /root/.ssh/authorized_keys /mnt/tmp/root/.ssh/authorized_keys

# umount everything
umount /mnt/tmp/dev
umount /mnt/tmp/proc
umount /mnt/tmp

# create template
qm create ${IMGID} --memory 512 --net0 virtio,bridge=vmbr0
qm importdisk ${IMGID} ${IMG} ${STORAGEID} --format qcow2
qm set ${IMGID} --scsihw virtio-scsi-pci --scsi0 ${STORAGEID}:$IMGID/vm-$IMGID-disk-0.qcow2
qm set ${IMGID} --ide2 ${STORAGEID}:cloudinit
qm set ${IMGID} --boot c --bootdisk scsi0
qm set ${IMGID} --serial0 socket --vga serial0
qm template ${IMGID}

# set host cpu, ssh key, etc
qm set ${IMGID} --scsihw virtio-scsi-pci
qm set ${IMGID} --cpu host
qm set ${IMGID} --agent enabled=1
qm set ${IMGID} --autostart
qm set ${IMGID} --onboot 1
qm set ${IMGID} --ostype l26
qm set ${IMGID} --ipconfig0 "ip=dhcp"

tutorial.md

• First install a k3s cluster or any other k8s distribution Make sure to use INSTALL_K3S_VERSION="v.1.27.10+k3s1" as k3s version https://docs.k3s.io/quick-start
• than install helm https://helm.sh/docs/intro/install/#through-package-managers
• use helm to install rancher https://ranchermanager.docs.rancher.com/getting-started/quick-start-guides/deploy-rancher-manager/helm-cli
• acces the webui and setup password
• setup the proxmox-ui-cluster https://github.com/cuza/rancher-ui-driver-proxmoxve?tab=readme-ov-file#using-the-proxmox-ve-ui-driver
• use the script inside the gist taken from here and create a new template. ! make SURE you have libguestfs-tools

Now you can just create new cluters with it, make sure to select rke1 and NOT rke2