Update for Debian Bookworm.

docker/Dockerfile

@@ -1,16 +1,16 @@
-FROM debian:bullseye AS debian-vm-build-base
+FROM debian:bookworm AS debian-vm-build-base
 WORKDIR /root
 RUN apt-get update && apt-get upgrade -y
 
 FROM debian-vm-build-base AS debian-vm-build-kernel
 WORKDIR /root
-RUN apt-get install -y build-essential linux-source kmod cpio initramfs-tools fakeroot libssl-dev lsb-release openssl libelf-dev rsync
+RUN apt-get install -y build-essential linux-source kmod cpio initramfs-tools fakeroot libssl-dev lsb-release openssl libelf-dev rsync python3
 COPY build-kernel.sh ./
 CMD ./build-kernel.sh
 
 FROM debian-vm-build-base AS debian-vm-build-rootfs
 WORKDIR /root
 RUN apt-get install -y debootstrap parted uuid udev
-RUN debootstrap bullseye rootfs https://deb.debian.org/debian/
+RUN debootstrap bookworm rootfs https://deb.debian.org/debian/
 COPY partition-image.sh build-rootfs.sh ./
 CMD ./build-rootfs.sh

docker/build-kernel.sh

@@ -35,6 +35,9 @@ cd linux-source-*
 xz -d < $VM_CONFIG_PATH > .config
 scripts/config \
     -d CONFIG_DEBUG_INFO \
+    -d CONFIG_DEBUG_INFO_BTF \
+    -d CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT \
+    -e CONFIG_DEBUG_INFO_NONE \
     -e CONFIG_VIRTIO \
     -e CONFIG_VIRTIO_PCI \
     -e CONFIG_VIRTIO_CONSOLE \

docker/build-rootfs.sh

@@ -23,9 +23,9 @@ echo "$VM_DEFAULT_HOSTNAME" > "$VM_ROOTFS_DIR/etc/hostname"
 
 # Add apt sources
 cat > "$VM_ROOTFS_DIR/etc/apt/sources.list" <<EOF
-deb http://deb.debian.org/debian bullseye main
-deb http://deb.debian.org/debian-security/ bullseye-security main
-deb http://deb.debian.org/debian bullseye-updates main
+deb http://deb.debian.org/debian bookworm main
+deb http://deb.debian.org/debian-security/ bookworm-security main
+deb http://deb.debian.org/debian bookworm-updates main
 EOF
 
 # Set up networking