[pve-devel] [PATCH V3 pve-container 1/6] fix #3711: optionally allow CT deletion to complete on disk volume removal errors

[Stefan Hrdlicka]

Make it possible to delete a container whoes underlying storage is no
longer available. This will just write an warning instead of dying.

Without setting the option ignore-storage-errors=1 a delete will still
fail, like it did before the changes. With this option set it will try to
delete the volume from the storage. If this fails it writes a warning.

review fixes
- rename parameter to ignore-storage-errors
- move eval further up the call chain

Signed-off-by: Stefan Hrdlicka <s.hrdlicka at proxmox.com>
---
 src/PVE/API2/LXC.pm | 8 ++++++++
 src/PVE/LXC.pm      | 6 ++++--
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/PVE/API2/LXC.pm b/src/PVE/API2/LXC.pm
index 79aecaa..19806fa 100644
--- a/src/PVE/API2/LXC.pm
+++ b/src/PVE/API2/LXC.pm
@@ -700,6 +700,13 @@ __PACKAGE__->register_method({
 		    ." enabled storages which are not referenced in the config.",
 		optional => 1,
 	    },
+	    'ignore-storage-errors' => {
+		type => 'boolean',
+		description => 'If set, this will ignore errors when trying to remove'
+		    . ' container storage.',
+		default => 0,
+		optional => 1,
+	    }
 	},
     },
     returns => {
@@ -761,6 +768,7 @@ __PACKAGE__->register_method({
 		$conf,
 		{ lock => 'destroyed' },
 		$param->{'destroy-unreferenced-disks'},
+		$param->{'ignore-storage-errors'},
 	    );
 
 	    PVE::AccessControl::remove_vm_access($vmid);
diff --git a/src/PVE/LXC.pm b/src/PVE/LXC.pm
index 4bbd739..fe68f75 100644
--- a/src/PVE/LXC.pm
+++ b/src/PVE/LXC.pm
@@ -861,7 +861,8 @@ sub delete_mountpoint_volume {
 }
 
 sub destroy_lxc_container {
-    my ($storage_cfg, $vmid, $conf, $replacement_conf, $purge_unreferenced) = @_;
+    my ($storage_cfg, $vmid, $conf, $replacement_conf,
+	$purge_unreferenced, $ignore_storage_errors) = @_;
 
     my $volids = {};
     my $remove_volume = sub {
@@ -872,7 +873,8 @@ sub destroy_lxc_container {
 	return if $volids->{$volume};
 	$volids->{$volume} = 1;
 
-	delete_mountpoint_volume($storage_cfg, $vmid, $volume);
+	eval { delete_mountpoint_volume($storage_cfg, $vmid, $volume); };
+	die $@ if !$ignore_storage_errors && $@;
     };
     PVE::LXC::Config->foreach_volume_full($conf, {include_unused => 1}, $remove_volume);
 
-- 
2.30.2