[pve-devel] [PATCH cluster] fix #3596: handle delnode of offline node

["Fabian Grünbichler" <f.gruenbichler@proxmox.com>]

the recommended way is to first shutdown, then delnode, and never let it
come back online, in which case corosync-cfgtool won't be able to kill
the removed (offline) node.

also, the order was wrong - if we first update corosync.conf to remove
the node entry from the nodelist, corosync doesn't know about the nodeid
anymore, so killing will fail even if the node is still online.

Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
---
 data/PVE/API2/ClusterConfig.pm | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/data/PVE/API2/ClusterConfig.pm b/data/PVE/API2/ClusterConfig.pm
index 8f4a5bb..5a6a1ac 100644
--- a/data/PVE/API2/ClusterConfig.pm
+++ b/data/PVE/API2/ClusterConfig.pm
@@ -485,9 +485,13 @@ __PACKAGE__->register_method ({
 
 	    delete $nodelist->{$node};
 
-	    PVE::Corosync::update_nodelist($conf, $nodelist);
+	    # allowed to fail when node is already shut down!
+	    eval {
+		PVE::Tools::run_command(['corosync-cfgtool','-k', $nodeid])
+		    if defined($nodeid);
+	    };
 
-	    PVE::Tools::run_command(['corosync-cfgtool','-k', $nodeid]) if defined($nodeid);
+	    PVE::Corosync::update_nodelist($conf, $nodelist);
 	};
 
 	$config_change_lock->($code);
-- 
2.30.2