Merge pull request #310 from threefoldtech/ub24full

ubuntu 24 flist kernel fix

tfgrid3/ubuntu24.04/fullvm/ubuntu24-fullvm-flist-builder.sh

@@ -28,11 +28,14 @@ cat <<EOF > ubuntu-noble/root/setup_inside_chroot.sh
 export PATH=/usr/local/sbin/:/usr/local/bin/:/usr/sbin/:/usr/bin/:/sbin:/bin
 rm /etc/resolv.conf
 echo 'nameserver 1.1.1.1' > /etc/resolv.conf
+echo "ubuntu-noble" > /etc/hostname
 apt-get update
 apt-get install cloud-init openssh-server curl initramfs-tools linux-virtual -y
 cloud-init clean
+apt-get install linux-image-6.8.0-31-generic -y
 echo 'fs-virtiofs' >> /etc/initramfs-tools/modules
 update-initramfs -c -k all
+update-grub
 apt-get clean
 EOF
 
@@ -45,6 +48,18 @@ arch-chroot ubuntu-noble /root/setup_inside_chroot.sh
 rm ubuntu-noble/root/setup_inside_chroot.sh
 rm -rf ubuntu-noble/dev/*
 
+# Check if extract-vmlinux is available and install if it's not
+if ! command -v extract-vmlinux &>/dev/null; then
+	    echo "extract-vmlinux not found, installing..."
+	    curl -O https://raw.githubusercontent.com/torvalds/linux/master/scripts/extract-vmlinux
+	    chmod +x extract-vmlinux
+            mv extract-vmlinux /usr/local/bin
+fi
+
+# Kernel Extraction
+extract-vmlinux ubuntu-noble/boot/vmlinuz | tee ubuntu-noble/boot/vmlinuz-6.8.0-31-generic.elf > /dev/null
+mv ubuntu-noble/boot/vmlinuz-6.8.0-31-generic.elf ubuntu-noble/boot/vmlinuz-6.8.0-31-generic
+
 # Create a compressed archive of the configured system for uploading to hub.
 tar -czf ubuntu-24.04_fullvm.tar.gz -C ubuntu-noble .