Better arch detect & arm64 cloud kernel

README.md

@@ -13,16 +13,10 @@ curl -fLO https://raw.githubusercontent.com/bohanyang/debi/master/debi.sh && chm
 ```
 sudo ./debi.sh --cdn --network-console --ethx --bbr --user root --password <这里设置 root 密码>
 ```
-
-**❗ ARM 机器安装失败临时解决办法：添加以下参数（安装 5.10 新版内核）**
-```
---install 'ca-certificates libpam-systemd linux-image-5.10.0-0.bpo.7-arm64 flash-kernel'
-```
-
-
+* ❗ **Oracle ARM 架构还需要添加 `--bpo-kernel` 参数，以安装新版 5.10 内核，否则系统可能无法启动**
 * 以上命令选项开启了 BBR；设置了网卡名称形式是 `eth0` 而不是 `ens3` 这种。
-* 如果是一般的 x86 架构 64 位机器（不是 ARM 架构的），还可以添加 `--cloud-kernel` 使用轻量版内核。
 * 不加 `--password` 选项会提示输入密码。
+* （可选）添加 `--cloud-kernel` 参数，以安装空间占用较小的内核，但可能会导致 UEFI 启动的机器（如 Oracle、Azure 及 Hyper-V、Google Cloud 等）VNC 黑屏。BIOS 启动的普通 VPS 则没有此问题。
 
 如果没有报错可以重启：
 
@@ -124,7 +118,8 @@ Otherwise, you can run this command to revert all changes made by the script:
  * `--efi` Create an *EFI system partition*. Default if `/sys/firmware/efi` exists
  * `--filesystem ext4`
  * `--kernel <string>` Choose an package for the kernel image
- * `--cloud-kernel` Choose `linux-image-cloud-amd64` as the kernel image
+ * `--cloud-kernel` Choose `linux-image-cloud-amd64` or `...arm64` as the kernel image
+ * `--bpo-kernel` Choose the kernel image from Debian Backports (newer version from the next Debian release)
  * `--no-install-recommends`
  * `--install 'ca-certificates libpam-systemd'`
  * `--safe-upgrade` **(Default)** `apt upgrade --with-new-pkgs`. [See](https://salsa.debian.org/installer-team/pkgsel/-/blob/master/debian/postinst)

debi.sh

@@ -98,6 +98,8 @@ force_gpt=true
 efi=
 filesystem=ext4
 kernel=
+cloud_kernel=false
+bpo_kernel=false
 install_recommends=true
 install='ca-certificates libpam-systemd'
 upgrade=
@@ -223,7 +225,10 @@ while [ $# -gt 0 ]; do
             shift
             ;;
         --cloud-kernel)
-            kernel=linux-image-cloud-amd64
+            cloud_kernel=true
+            ;;
+        --bpo-kernel)
+            bpo_kernel=true
             ;;
         --no-install-recommends)
             install_recommends=false
@@ -280,6 +285,42 @@ while [ $# -gt 0 ]; do
     shift
 done
 
+if [ -z "$architecture" ]; then
+    architecture=$(dpkg --print-architecture 2> /dev/null) ||
+    architecture=$(uname -m)
+    case $architecture in
+        x86_64)
+            architecture=amd64
+            ;;
+        aarch64)
+            architecture=arm64
+            ;;
+        i386)
+            :
+            ;;
+        *)
+            err 'No "--architecture" specified'
+    esac
+fi
+
+if [ -z "$kernel" ]; then
+    if [ "$cloud_kernel" = true ]; then
+        if [ "$architecture" != amd64 ] && [ "$architecture" != arm64 ]; then
+            err 'Cloud kernel is only available for amd64 (x86_64) and arm64 (aarch64) architectures'
+        fi
+        kernel="linux-image-cloud-$architecture"
+    else
+        kernel="linux-image-$architecture"
+    fi
+
+    if [ "$bpo_kernel" = true ]; then
+        if [ "$suite" = sid ] || [ "$suite" = unstable ]; then
+            err 'Backports kernel is not available for sid/unstable distribution'
+        fi
+        kernel="$kernel/$suite-backports"
+    fi
+fi
+
 if [ -n "$authorized_keys_url" ] && ! download "$authorized_keys_url" /dev/null; then
     err "Failed to download SSH authorized public keys from \"$authorized_keys_url\""
 fi
@@ -522,14 +563,14 @@ EOF
 
 fi
 
-$save_preseed << 'EOF'
+$save_preseed << EOF
 
 # Base system installation
 
+d-i base-installer/kernel/image string $kernel
 EOF
 
 [ "$install_recommends" = false ] && echo "d-i base-installer/install-recommends boolean $install_recommends" | $save_preseed
-[ -n "$kernel" ] && echo "d-i base-installer/kernel/image string $kernel" | $save_preseed
 
 [ "$security_repository" = mirror ] && security_repository=$mirror_protocol://$mirror_host${mirror_directory%/*}/debian-security
 
@@ -579,11 +620,6 @@ EOF
 
 save_grub_cfg='cat'
 if [ "$dry_run" = false ]; then
-    if [ -z "$architecture" ]; then
-        architecture=amd64
-        command_exists dpkg && architecture=$(dpkg --print-architecture)
-    fi
-
     base_url="$mirror_protocol://$mirror_host$mirror_directory/dists/$suite/main/installer-$architecture/current/images/netboot/debian-installer/$architecture"
     firmware_url="https://cdimage.debian.org/cdimage/unofficial/non-free/firmware/$suite/current/firmware.cpio.gz"