Search results

  1. KVM guests freeze (hung tasks) during backup/restore/migrate

    This looks exactly like the problem that I (and many others) reported for years in this thread and others. The problem is most likely a Linux kernel / KVM issue. What seems to happen is when local disks are busy due to a restore operation, probably the dirty page IO of the host system is...
  2. PVE 5.4 - Nodes suddenly reboot - no entries in logs

    Do you boot from ZFS on your server that reboots without any warning? Also, what is your software+hardware configuration? (processor, memory, disks, filesystem, swap, etc.)
  3. Problems installing Ubuntu 18.04 LTS in KVM

    I have tried to install Ubuntu 18.04 LTS Server in a KVM machine on a recently updated Proxmox 5.4 host, but after entering the IPv4 address manually, and hitting "Save" the installer instantly restarts. Tried different hardware configurations (E1000 vs. VirtIO-net, disconnecting the adapter...
  4. CephFS: How to create with different size?

    When creating a regular (RBD) Ceph pool, there are options in both the GUI and in pveceph to determine the size (replication count) and the min. size (online replicas for read) of the pool. However, when creating a CephFS pool, neither the GUI, not pveceph provides an option to create one with a...
  5. Proxmox API questions about user data

    Let's say my username is "pveuser@pve". If I query ACCESS/USERS, I get all the user data I'm allowed to see, among it my own, but ACCESS/USERS/PVEUSER@PVE gives a 403 Forbidden error. Problem is I can't GET (or POST) ACCESS/USERS/PVEUSER@PVE to read (or write) my own data, unless I have the...
  6. KVM guests freeze (hung tasks) during backup/restore/migrate

    Hi Morbious, can you please post some more info? - host HW configuration (CPU and memory type and amount, how many NVMe disks) - host SW configuration (kernel versions on both machines, storage type and filesystem used), how many VMs - VM configs of the VMs you get errors on (cpu number, memory...
  7. KVM guests freeze (hung tasks) during backup/restore/migrate

    Unfortunately the Proxmox developers @tom @fabian @dcsapak never acknowledged this as a problem or bug on it's own, rather they try to blame hardware or software configuration, and they even killed the bugreport I filed that started to accumulate many user reports...
  8. [SOLVED] ZFS replica ~2x larger than original

    That's very interesting... but the problem only affects RAIDZ2? So if I use a 4 disk RAIDZ, 8k is fine? Or should I set the volblocksize 16k as well?
  9. PVE 4.4 to 5.x upgrade problem

    It looks like the problem got solved after I restarted all the Proxmox services: service corosync restart /etc/init.d/pve-cluster restart /etc/init.d/pvedaemon restart /etc/init.d/pvestatd restart /etc/init.d/pveproxy restart After another apt-get update, apt-get dist-upgrade works again...
  10. PVE 4.4 to 5.x upgrade problem

    I have found this thread with a similar problem: https://forum.proxmox.com/threads/cant-update-from-4-4-to-5-1-due-to-libpve-common-perl.43458/page-2 However the command @fabian suggested does not show any packages held: # apt-mark showhold # Anybody seen this?
  11. PVE 4.4 to 5.x upgrade problem

    I am upgrading our cluster, node by node from PVE 4.4 to 5 following the wiki: https://pve.proxmox.com/wiki/Upgrade_from_4.x_to_5.0 Several nodes upgraded perfectly, however on one node I get the following errors: # apt-get dist-upgrade Reading package lists... Done Building dependency tree...
  12. KVM guests freeze (hung tasks) during backup/restore/migrate

    Yes, this problem is still massively affecting many Proxmox users, unfortunately no one has any idea what could be causing it. Actually the Proxmox developers didn't even acknowledge so far that this bug exists (my bugreport is still in NEW status), so I wouldn't hold my breath that this gets...
  13. Frequent CPU stalls in KVM guests during high IO on host

    The issue described in this thread (KVM processes and kernel freezing while host is doing heavy disk or network IO) is somewhat mitigated if the vm.dirty_ratio is set to the minimum, like 2 or 1. Any value above that causes the error to appear very frequently. Limiting the ZFS ARC size has...
  14. Proxmox: Server reboots randomly

    Are you on ZFS? Is your system low on free memory? If your answer to both questions is yes, then your spontaneous reboot can be prevented by the following two steps: 1. ZFS ARC size We aggressively limit the ZFS ARC size, as it has led to several spontaneous reboots in the past when left...
  15. Is it possible to throttle backup and restore disk io?

    This is very interesting news, would love to test. Can you point me to the particular patch about this issue? Is it in ZFS or in PVE? So I suppose this is in 5.x pvetest? Also, is there going to be a systemwide, general maximum bandwidth setting for these operations, or can only be set via GUI...
  16. Is it possible to throttle backup and restore disk io?

    Are there any news on limiting the bandwidth of restore and migrate operations? Due to the KVM CPU freeze bug in the kernel I reported (and posted about several times), heavy disk writes not only slow down other VMs disk IO, but their network IO as well due to the guest CPU freezing, rendering...
  17. ZFS 0.7.7 may cause data loss, Proxmox 5.1 just updated to it!

    Sorry @tom , you are right of course, missed the discussion. Please delete the thread if possible.
  18. ZFS 0.7.7 may cause data loss, Proxmox 5.1 just updated to it!

    According to the articles below, ZFS on Linux 0.7.7 has a disappearing file bug, and it is not recommended to be installed in a production environment: https://www.servethehome.com/zfs-on-linux-0-7-7-disappearing-file-bug/ https://news.ycombinator.com/item?id=16797932 My test Proxmox box that's...
  19. general protection fault: 0000

    This keeps happening every few days on a single cpu Sandy Bridge box, running 3 Windows VMs on Proxmox 4.4. Can someone help to understand what's happening? Mar 28 19:42:55 proxmox6 kernel: [133407.284601] general protection fault: 0000 [#1] SMP Mar 28 19:42:55 proxmox6 kernel: [133407.284628]...
  20. 3-Node Cluster Setup with non-switched interfaces

    What about a routed (OSPF) ring topology? You theorized about connecting your servers in a ring fashion...

About

The Proxmox community has been around for many years and offers help and support for Proxmox VE and Proxmox Mail Gateway. We think our community is one of the best thanks to people like you!

Get your subscription!

The Proxmox team works very hard to make sure you are running the best software and getting stable updates and security enhancements, as well as quick enterprise support. Tens of thousands of happy customers have a Proxmox subscription. Get your own in 60 seconds.

Buy now!