On 18.08.2013 16:46, David Weber wrote:
Hi,
we recently ran into a problem when trying to start more than 20 guests if direct locking with virtlockd was enabled. The error message locked like this: # start test7 error: Failed to start domain test7 error: Cannot recv data: Connection reset by peer
Our research indicated there is a max_clients parameter set in src/locking/lock_daemon.c which causes the limitation. Simply increasing this number works as a workaround.
I don't have a deep understanding of the code, so I don't know if there is a bug and the connection should be dropped after the lock is set or if max_clients really is the way to go. If the latter I guess max_clients should be configurable like in virtlockd or at least be higher than 20 :)
Libvirt version 1.1.1
Cheers, David
From 5187231a973a9956723683c7fad14c8bb3dfcac2 Mon Sep 17 00:00:00 2001 From: David Weber <wb@munzinger.de> Date: Sun, 18 Aug 2013 16:16:36 +0200 Subject: [PATCH] Increase virtlockd max clients
--- src/locking/lock_daemon.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/locking/lock_daemon.c b/src/locking/lock_daemon.c index c4c1727..d96d0fc 100644 --- a/src/locking/lock_daemon.c +++ b/src/locking/lock_daemon.c virLockDaemonNew(bool privileged) return NULL; }
- if (!(lockd->srv = virNetServerNew(1, 1, 0, 20, + if (!(lockd->srv = virNetServerNew(1, 1, 0, 100, -1, 0, false, NULL, virLockDaemonClientNew,
This will work for a while until somebody tries starting up more than 100 libvirtds. Maybe it's time for /etc/libvirt/virtlockd.conf introduction. Michal