2025-06-26-13-33-49: Cronjob

roles/lmn_vm/files/vm-netboot

@@ -0,0 +1,78 @@
+#!/usr/bin/bash
+#
+# Start a netboot VM connected to macvtap device and fraction of mem/cpus
+#
+set -eu
+
+## Imporant for all virsh libvirt calls:
+export XDG_CONFIG_HOME="/var/tmp/vm/${UID}"
+
+menu=(standard "CLI Standard Debian GNU/Linux NFS"
+      standard-ram "CLI Standard Debian GNU/Linux RAM"
+      kde-desktop "KDE Plasma Desktop Debian GNU/Linux NFS"
+      gnome-desktop "Gnome Desktop Debian GNU/Linux NFS")
+img=$(dialog --clear --backtitle "Virtual Machine Chooser" \
+             --title "Choose the Virtual Machine to Start" \
+             --menu "Start VM:" 12 70 6 "${menu[@]}" 2>&1 >/dev/tty)
+
+## If the menu is canceled, $0 stops here because of set -e
+
+# FIXME: Use first device found for now:
+mac="$(ip link | grep -A1 -m1 "macvtap-" | \
+          sed -nE "s%\s+link/ether ([[:xdigit:]:]{17}) .+%\1%p")"
+tapdev="$(ip link | grep -A1 -m1 "macvtap-" | sed -nE "s%^[1-9]:\s(\S+)@.*%\1%p")"
+
+if [[ $# -eq 0 ]] ; then
+    mem=$(sed -En "s/^MemAvailable:\s+([0-9]+)\s+kB/\1/p" /proc/meminfo)
+    cpu=$(sed -En "0,/^cpu cores/s/^cpu cores\s+:\s+([0-9]+)/\1/p" /proc/cpuinfo)
+    arg=("--memory=$((mem/2048))" "--vcpu=$((cpu/2))")
+    echo Set options: "${arg[@]}"
+else
+    arg=("$@")
+fi
+
+kernel="http://livebox/d-i/n-live/${img%-ram}/live/vmlinuz"
+initrd="http://livebox/d-i/n-live/${img%-ram}/live/initrd.img"
+kargs=(boot=live components splash locales=de_DE.UTF-8 keyboard-layouts=de
+       swap=true live-config.timezone=Europe/Berlin)
+
+case "$img" in
+    standard*)
+        arg+=(--autoconsole=text)
+        kargs+=(console=ttyS0)
+        ;;&
+    *-ram)
+        kargs+=("fetch=http://10.190.1.2/d-i/n-live/${img%-ram}/live/filesystem.squashfs")
+        ;;
+    *)
+        kargs+=(netboot=nfs "nfsroot=10.190.1.2:/srv/nfs/debian-live/${img%-ram}")
+        ;;
+esac
+
+type="ethernet,mac=${mac},target.dev=${tapdev},xpath1.set=./target/@managed=no"
+n=0
+for vm in $(virsh --connect qemu:///session list --all --name) ; do
+    if virsh domiflist "$vm" | grep -q "$mac" ; then
+	type="user"
+	virt-manager &
+    fi
+    if [[ "${img}$n" = "$vm" ]] ; then
+        n=$((n+1))
+    fi
+done
+kargs+=(hostname="${img}$n")
+
+## FIXME: use passt, needs more settings for correct DNS/gateway
+# type=user,xpath1.create=./backend,xpath2.set=./backend/@type=passt,xpath3.create=./ip,xpath4.set=./ip/@family=ipv4,xpath5.set=./ip/@address=172.16.1.1,xpath6.set=./ip/@prefix=24,xpath7.create=./portForward,xpath8.set=./portForward/@proto=tcp,xpath9.set=./portForward/range/@start=2001,xpath10.set=./portForward/range/@end=2500,xpath11.set=./portForward/range/@to=1
+
+http_proxy='' \
+          exec virt-install \
+          --name "${img}$n" \
+          --osinfo debiantesting \
+          --nodisks --import --noreboot --transient \
+          --controller type=scsi,model=virtio-scsi \
+          --install kernel="$kernel",initrd="$initrd",kernel_args="${kargs[*]}" \
+          --network "type=$type" "${arg[@]}"
+
+# --filesystem "$HOME",share
+# mount -t 9p share /mnt