First approach

docker-compose.yml

@@ -6,8 +6,9 @@ services:
     privileged: true
     environment:
       - BUILD=false # In case you want to re-generate a all the images, not recommended
-      - CLEAN=true # it remove the images directory
-      - UNATTENDED=false # UNATTENDED version
+      - CLEAN=false # it remove the images directory
+      - UNATTENDED=true # UNATTENDED version
+      - BASE_OS=debian # Base OS version (debian or ubuntu)
     volumes:
       - ./images:/images
       - "/var/run/docker.sock:/var/run/docker.sock"

iso/scripts/generate_ISO.sh

@@ -22,4 +22,8 @@ fi
 mkdir -p /usr/src/app/dappnode
 touch /usr/src/app/dappnode/iso_install.log
 
-/usr/src/app/iso/scripts/generate_dappnode_iso_debian.sh
+if [ "$BASE_OS" = "ubuntu" ]; then
+    /usr/src/app/iso/scripts/generate_dappnode_iso_ubuntu.sh
+else
+    /usr/src/app/iso/scripts/generate_dappnode_iso_debian.sh
+fi

iso/scripts/generate_dappnode_iso_debian.sh

@@ -25,12 +25,13 @@ rm -rf dappnode-isoº
 rm -rf DappNode-debian-*
 
 echo "Extracting the iso..."
-xorriso -osirrox on -indev /images/${ISO_NAME} \
-    -extract / dappnode-iso
+osirrox -indev /images/${ISO_NAME} -extract / dappnode-iso
 
+# Using a 512-byte block size to ensure the entire Master Boot Record (MBR) is captured.
+# The MBR contains boot code, the partition table, and a boot signature, all essential for creating bootable media.
+# This ensures that the new ISO being created is bootable under different system setups
 echo "Obtaining the isohdpfx.bin for hybrid ISO..."
-dd if=/images/${ISO_NAME} bs=432 count=1 \
-    of=dappnode-iso/isolinux/isohdpfx.bin
+dd if=/images/${ISO_NAME} bs=512 count=1 of=dappnode-iso/isolinux/isohdpfx.bin
 
 cd /usr/src/app/dappnode-iso # /usr/src/app/dappnode-iso
 

iso/scripts/generate_dappnode_iso_ubuntu.sh

@@ -0,0 +1,108 @@
+#!/bin/bash
+set -e
+
+ISO_BUILD_PATH="/usr/src/app/dappnode-iso"
+DAPPNODE_SCRIPTS_PATH="/usr/src/app/scripts"
+VARS_FILE="/tmp/vars.sh"
+TMP_INITRD="/tmp/makeinitrd"
+
+# Source = https://cdimage.debian.org/debian-cd/current/amd64/iso-cd/debian-12.5.0-amd64-netinst.iso
+BASE_ISO_NAME=ubuntu-24.04-live-server-amd64.iso
+BASE_ISO_PATH="/images/${BASE_ISO_NAME}"
+DAPPNODE_ISO_PATH="/images/DAppNode-${BASE_ISO_NAME}"
+ISO_URL=https://labs.eif.urjc.es/mirror/ubuntu-releases/24.04/
+SHASUM="8762f7e74e4d64d72fceb5f70682e6b069932deedb4949c6975d0f0fe0a91be3  ${BASE_ISO_PATH}"
+
+echo "Downloading Ubuntu ISO image: ${BASE_ISO_NAME}..."
+if [ ! -f ${BASE_ISO_PATH} ]; then
+    wget ${ISO_URL}/${BASE_ISO_NAME} \
+        -O ${BASE_ISO_PATH}
+fi
+echo "Done!"
+
+echo "Verifying download..."
+[[ "$(shasum -a 256 ${BASE_ISO_PATH})" != "$SHASUM" ]] && {
+    echo "ERROR: wrong shasum"
+    exit 1
+}
+
+echo "Clean old files..."
+rm -rf dappnode-isoº
+rm -rf DappNode-ubuntu-*
+
+echo "Extracting the iso..."
+osirrox -indev ${BASE_ISO_PATH} -extract / dappnode-iso
+
+# Using a 512-byte block size to ensure the entire Master Boot Record (MBR) is captured.
+# The MBR contains boot code, the partition table, and a boot signature, all essential for creating bootable media.
+echo "Obtaining the isohdpfx.bin for hybrid ISO..."
+dd if=/images/${BASE_ISO_NAME} bs=512 count=1 of=${ISO_BUILD_PATH}/boot/grub/isohdpfx.bin
+
+echo "Creating the new Ubuntu ISO..."
+mkisofs -isohybrid-mbr ${ISO_BUILD_PATH}/boot/grub/isohdpfx.bin \
+    -eltorito-catalog ${ISO_BUILD_PATH}/boot.catalog \
+    -eltorito-boot ${ISO_BUILD_PATH}/boot/grub/i386-pc/eltorito.img -no-emul-boot -boot-load-size 4 \
+    -boot-info-table -eltorito-alt-boot --efi-boot ${ISO_BUILD_PATH}/EFI/boot/bootx64.efi -no-emul-boot \
+    -isohybrid-gpt-basdat -o ${DAPPNODE_ISO_NAME} .
+
+exit 0
+
+echo "Downloading third-party packages..."
+sed '1,/^\#\!ISOBUILD/!d' ${DAPPNODE_SCRIPTS_PATH}/dappnode_install_pre.sh >${VARS_FILE}
+# shellcheck disable=SC1091
+source ${VARS_FILE}
+
+echo "Creating necessary directories and copying files..."
+mkdir -p ${ISO_BUILD_PATH}/dappnode
+cp -r ${DAPPNODE_SCRIPTS_PATH} ${ISO_BUILD_PATH}/dappnode
+cp -r /usr/src/app/dappnode/* ${ISO_BUILD_PATH}/dappnode
+
+echo "Customizing preseed..."
+mkdir -p ${TMP_INITRD}
+cp ${ISO_BUILD_PATH}/casper/initrd ${TMP_INITRD}/
+if [[ $UNATTENDED == *"true"* ]]; then
+    # TODO: Check if this is the correct preseed file for Ubuntu
+    cp /usr/src/app/iso/preseeds/preseed_unattended.cfg ${TMP_INITRD}/preseed.cfg
+else
+    cp /usr/src/app/iso/preseeds/preseed.cfg ${TMP_INITRD}/preseed.cfg
+fi
+
+cpio -id -H newc <${TMP_INITRD}/initrd
+# shellcheck disable=SC2002
+cat ${TMP_INITRD}/initrd | cpio -t >/tmp/list
+echo "preseed.cfg" >>/tmp/list
+rm ${TMP_INITRD}/initrd
+cpio -o -H newc </tmp/list >initrd
+#gzip initrd
+cd -
+mv ${TMP_INITRD}/initrd ${ISO_BUILD_PATH}/casper/initrd
+cd ..
+
+#mkdir -p boot/grub/theme
+
+echo "Configuring the boot menu for DappNode..."
+cp /usr/src/app/iso/boot/grub.cfg boot/grub/grub.cfg
+#cp /usr/src/app/iso/boot/theme_1 boot/grub/theme/1
+#cp /usr/src/app/iso/boot/isolinux.cfg isolinux/isolinux.cfg
+#cp /usr/src/app/iso/boot/menu.cfg isolinux/menu.cfg
+#cp /usr/src/app/iso/boot/txt.cfg isolinux/txt.cfg
+#cp /usr/src/app/iso/boot/splash.png isolinux/splash.png
+
+echo "Fix md5 sum..."
+# shellcheck disable=SC2046
+md5sum $(find . ! -name "md5sum.txt" -type f) >md5sum.txt
+
+echo "Generating new iso..."
+# Adjust paths as necessary based on actual directory contents
+xorriso -as mkisofs \
+    -isohybrid-mbr boot/grub/isohdpfx.bin \
+    -b EFI/boot/grubx64.efi \
+    -no-emul-boot \
+    -boot-load-size 4 \
+    -boot-info-table \
+    -eltorito-alt-boot \
+    -e boot/grub/i386-pc/eltorito.img \
+    -no-emul-boot \
+    -isohybrid-gpt-basdat \
+    -o /images/DAppNode-${ISO_NAME} \
+    . #    -c boot/grub/boot.cat \