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By the way it seems there's a loop when Proxmox is trying to remount an NFS share : Creates a lot of processes but when mount is frozen, PVE re-try to mount...

Hi, Today I had the same problem on a node (stale NFS mount), is there a way to avoid this situation ? Why PVE is freezing on a stale NFS mount, which is not used ? (confirmed with lsof, no process were accessing nfs mount). Thank you

Still not working for me... test1:~# corosync notice [MAIN ] Corosync Cluster Engine ('2.3.5'): started and ready to provide service. info [MAIN ] Corosync built-in features: augeas systemd pie relro bindnow test1:~# /etc/init.d/pve-cluster start Starting pve cluster filesystem ...

Ok that's just for corosync key, understood. I will try this.

Ok ok, I just say that's unusable in production environment. Hi spirit, thank you for your how-to, but I don't think it can work. When you run "pvecm add ipofnode1 -force" on a non-rebooted node, it will fail because it calls 'systemctl stop pve-cluster' and systemctl does not work yet (system...

Yes I do 1 cluster at a time, but read procedure : impossible to mix 3.4 & 4.0 nodes in a same cluster. So procedure is to upgrade a first node, and create a new cluster on that node. So during upgrade, you have 2 clusters instead of one. When you have thousands of nodes, you can't do it by...

If I use procedure provided by spirit, it seems there's no downtime, isn't it ? Problem is that upgrade needs to be done "by hand", impossible to automate it with Ansible for example. And during upgrade, we have 2 clusters, not 1....

If I understand well, there is no cluster upgrade procedure from 3.4 to 4.0 ? We need to re-create cluster from root so we loose all cluster configuration as users, permissions, etc ? I can't understand your strategy with this release. Think to people having cluster with dozens of nodes ...

Found solution by myself, there's no need to use vconfig, just use ip command : ip link add link eth0 name eth0.100 type vlan id 100 See thread : http://forum.proxmox.com/threads/24162-Proxmox-4-0-VLAN

Hi everyone, I just upgraded a node to PVE 4, and I have a problem with the vlan package, which is listed as conflict in pve-manager. pve-manager is supposed to provide vlan, but I don't have vconfig command. I really need vconfig command, how can I do ? Thank you.

Hi everyone, Today I did an "aptitude update && aptitude safe-upgrade" on my nodes. The last one was about 2 weeks ago. After this, all my nodes are producing tons of logs like : Nothing changed from network configuration. I did "service cman stop; sleep 2; service cman start; service...

Yes that's an idea :)

Hi everyone, I use RBD as backend storage for my VMs. All VMs are single disk, but on a few ones, I can see a second disk (disk-2) in my RBD pool, which have strange sizes : 4.49GB when primary disk is 32GB, 8.49GB when primary disk is 64GB, etc. And I have some disk-2 related to VM IDs that...

It seems that Ceph repos changed recently. As a workaround, edit /usr/bin/pveceph and replace : my $ua = LWP::UserAgent->new(protocols_allowed => ['https'], timeout => 30); With : my $ua = LWP::UserAgent->new(protocols_allowed => ['https', 'http'], timeout => 30);

My problem occurs only on guest running MariaDB. When I start guest with cache=writeback & mount its ext4 with nobarrier = no iowait When I start guest with cache=none & mount its ext4 with nobarrier = high iowait. Can we deduce from this that Ceph is the problem ?

the iostat I posted is from guest. host has no iowait, has free cpu, free mem, Ceph is not overloaded (client io 284 kB/s rd, 9584 kB/s wr, 721 op/s)

In fact my problem of high IO wait time does not seem related to RBD or disk. I really don't understand why system is showing high IO, because it does not write a lot on disk : # iostat Linux 3.2.0-4-amd64 (zabbix01-proxy1) 04/10/2015 _x86_64_ (1 CPU) avg-cpu: %user %nice...

I know I read it. Does XFS extsize parameter will "defragment" disk itself or do I need to run xfs_fsr ? I'm actually running xfs_fsr on some OSD, after setting parameter to true, but it takes very long time...

I already customized mount options in Ceph. I will see about read_ahead_kb. Thank you. I saw that all my OSD XFS are fragmented (>15%), so I will start with it. I found some information. That's interesting :) Why virtio-scsi is better ? Is it the "SCSI" option in PVE GUI ?

Hi all, I run PVE & Ceph (Giant) as RBD storage. I have high iowaits on my VMs. All are configured with cache=writeback because I thought that was the best for performance. Is it really true ? Which cache method do you recommend for RBD ? Thank you. Flo