pve5to6: add check for nested kvm

this warns the user that he cannot live migrate VMs with svm/vmx to PVE6 when
the nested parameter of the kvm module is on

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>

diff --git a/PVE/CLI/pve5to6.pm b/PVE/CLI/pve5to6.pm
index c61eb241eda301bc3bf4ce985c87d2c86c20d85f..cb27fd638b4363ab7864842cb36eb2379008d55b 100644 (file)
--- a/PVE/CLI/pve5to6.pm
+++ b/PVE/CLI/pve5to6.pm
@@ -119,6 +119,30 @@ sub check_pve_packages {
     }
 }
 
+sub check_kvm_nested {
+    print "\nCHECKING KVM NESTED PARAMETER\n\n";
+    my $module_sysdir = "/sys/module";
+    if (-e "$module_sysdir/kvm_amd") {
+       $module_sysdir .= "/kvm_amd/parameters";
+    } elsif (-e "$module_sysdir/kvm_intel") {
+       $module_sysdir .= "/kvm_intel/parameters";
+    } else {
+       log_skip("no kvm module found");
+       return;
+    }
+
+    if (-f "$module_sysdir/nested") {
+       my $val = eval { PVE::Tools::file_read_firstline("$module_sysdir/nested") };
+       if ($val && $val =~ m/Y|1/) {
+           log_warn("KVM nested parameter set. VMs with vmx/svm flag will not be able to live migrate to PVE 6.");
+       } else {
+           log_pass("KVM nested parameter not set.")
+       }
+    } else {
+       log_skip("KVM nested parameter not found.");
+    }
+}
+
 sub check_storage_health {
     print "\nCHECKING CONFIGURED STORAGES\n\n";
     my $cfg = PVE::Storage::config();
@@ -359,6 +383,7 @@ __PACKAGE__->register_method ({
        my ($param) = @_;
 
        check_pve_packages();
+       check_kvm_nested();
        check_cluster_corosync();
        check_ceph();
        check_storage_health();