pve7to8: add check for systemd-boot presence where needed

since the package won't get installed for systems upgraded from 7 to 8
we warn users who need systemd-boot - to be able to initialize new
ESPs - that they need to install it

The check for package installation is based on existance of the
changelog, since the package information used in pve7to8 comes from
the API-modules, which limit it to the pve-relevant packages.

tested in VMs with uefi and legacy mode, with existing
proxmox-boot-uuids both with and w/o systemd-boot being installed

Signed-off-by: Stoiko Ivanov <s.ivanov@proxmox.com>

diff --git a/PVE/CLI/pve7to8.pm b/PVE/CLI/pve7to8.pm
index 7dd74316a8197962274847228adf353506645b66..da1e15bc2af6ec2225400effcca04f8a67eb612d 100644 (file)
--- a/PVE/CLI/pve7to8.pm
+++ b/PVE/CLI/pve7to8.pm
@@ -1259,6 +1259,34 @@ sub check_time_sync {
     }
 }
 
+sub check_bootloader {
+    log_info("Checking bootloader configuration...");
+    if (!$upgraded) {
+       log_skip("not yet upgraded, no need to check the presence of systemd-boot");
+       return;
+    }
+
+    if (! -f "/etc/kernel/proxmox-boot-uuids") {
+       log_skip("proxmox-boot-tool not used for bootloader configuration");
+       return;
+    }
+
+    if (! -d "/sys/firmware/efi") {
+       log_skip("System booted in legacy-mode - no need for systemd-boot");
+       return;
+    }
+
+    if ( -f "/usr/share/doc/systemd-boot/changelog.Debian.gz") {
+       log_pass("systemd-boot is installed");
+    } else {
+       log_warn(
+           "proxmox-boot-tool is used for bootloader configuration in uefi mode"
+           . "but the separate systemd-boot package, existing in Debian Bookworm  is not installed"
+           . "initializing new ESPs will not work until the package is installed"
+       );
+    }
+}
+
 sub check_misc {
     print_header("MISCELLANEOUS CHECKS");
     my $ssh_config = eval { PVE::Tools::file_get_contents('/root/.ssh/config') };
@@ -1359,6 +1387,7 @@ sub check_misc {
     check_node_and_guest_configurations();
     check_apt_repos();
     check_nvidia_vgpu_service();
+    check_bootloader();
 }
 
 my sub colored_if {