Re: [Pacemaker] KVM live migration and multipath

Hi, I did not trigger file system corruptions again. So, at this moment it looks like it is important to: - turn caching off - use native aio - *and* use an up-to-date machine type Failure to meet any of these criteria would result in fs corruption. Does this make sense at all? Later part is

Re: [Pacemaker] KVM live migration and multipath

Hi, I am getting closer... Some updates for those who are interested. Did you turn caching off for your VMs disks? That's a point. Indeed caching was not explicitely turned off and I just noticed that the default setting of the cache attribute of the device tag in libvirt has changed. [1] I w

Re: [Pacemaker] KVM live migration and multipath

Thank you for replying, Vladislav! I think the problem should be unrelated to iSCSI, you have correct setup (of course I did not thoroughly look through all info, but idea is perfectly correct). Thank you for confirming. Did you turn caching off for your VMs disks? That's a point. Indeed

Re: [Pacemaker] STONITH without mandatory success possible?

echo "0" > /sys/class/net/virbr0/bridge/multicast_snooping That results in multicast packets are broadcasted to all bridge ports. I prefer to have igmp querier turned on on a central switch. I had the impression that the OP used virtual machines on a local (virtual and private) network. I

Re: [Pacemaker] STONITH without mandatory success possible?

Hi Doug, I have some 2-node active-passive clusters that occasionally lose Corosync connectivity. The connectivity is fixed with a reboot. They don't have shared storage so stonith doesn't have to happen for another node to take control of the resource. Also they are VMs so I can't use a stand

[Pacemaker] KVM live migration and multipath

Hi All, it asked this on linux-ha but had no luck. Is anybody here who has some hints for me or could tell me if it is possible (and sensible) to live migrate a virtual machine if the disk image is provided by a multipath device? I am not sure if my approach is flawed or if I am using the wr

Re: [Pacemaker] Starting Pacemaker Cluster Manager: [FAILED]

Hi Colin, Newbie here. I am trying to create a two-node cluster with the following: Ubuntu Server 11.10 Pacemaker 1.1.5 Corosync Cluster Engine 1.3.0 CMAN I am unable to start Pacemaker. CMAN seems to run with Corosync fine. I see this line : write(1, "[FAILED]\r", 9) = 9. Is this a permis

Re: [Pacemaker] pacemaker + cLVM on Ubuntu Precise (12.04)?

Hi Matthew, thank you for sharing your experience! Indeed, I encountered some of the obstacles you mentioned. I considered switching to another distro, but would prefer to stay with what I use regulary in most of our VMs and my desktop. FYI, I am interested in building a small cluster consis

Re: [Pacemaker] Ordering Constraint: Difference Between Stop and Migrate?

Hi David, Am 12.03.2013 19:03, schrieb David Vossel: Take at look at this issue and the comment I posted. http://bugs.clusterlabs.org/show_bug.cgi?id=5055#c3 I've looked into this in great detail. At the moment you have encountered a limitation of policy engine. Hopefully someday we can fix

[Pacemaker] Ordering Constraint: Difference Between Stop and Migrate?

Dear all, Is it possible with ordering constraints to distinguish stopping a resource from migrating it to another node? I think it is not possible since the resource manager would need to know the "migration downtime" in advance but anyways I will give it a try: Given two resources A and B

Re: [Pacemaker] Pacemaker cluster with different operating systems

Hi Osman, We think that the third node will be in standby, so only corosync and pacemaker processes will execute and no resource will be executed on this node by the cluster. I may be wrong here but from my understanding and according to [1] it is sufficient to run corosync only on an only-

Re: [Pacemaker] Does LVM resouce agent conflict with UDEV rules?

Thank you Jacek, you are confirming my assumption. I will see if disabling the rule breaks anything else... Best regards, Sven ___ Pacemaker mailing list: Pacemaker@oss.clusterlabs.org http://oss.clusterlabs.org/mailman/listinfo/pacemaker Project

[Pacemaker] Does LVM resouce agent conflict with UDEV rules?

Dear all, on my test setup (iSCSI on top of LVM on top of DRBD) I was not able to reliable migrate the volume group from one node to the other. I have two logical volumes that are mapped to two different LUNs on one iSCSI Target. During migration of the resource group (LVM + iSCSI) the LVM r

Re: [Pacemaker] pacemaker + cLVM on Ubuntu Precise (12.04)?

Dear Andrew, The destination(s) are ok, but possibly no-one has used ubuntu for what you;re trying to do. thank you for your response - I will give it a try then. Possibly the information is just outdated - I hoped that one of the "Ubuntu HA Maintainers" team would reading this and could cla

[Pacemaker] pacemaker + cLVM on Ubuntu Precise (12.04)?

, Sven Original-Nachricht Betreff: [Linux-HA] cLVM on Ubuntu Precise (12.04)? Datum: Wed, 13 Feb 2013 09:48:49 +0100 Von: Sven Arnold Antwort an: General Linux-HA mailing list Organisation: LOCALITE GmbH An: linux...@lists.linux-ha.org Dear all, I am new to this list and