[Bug 2035225] Re: libvirtd failed to open the RBD image

[Christian Ehrhardt ]

Hi,
just saying "I use ceph and is slow" is unfortunately not much one can act one.
There are plenty of ceph setups in our openstack deployments not being affected by this, so it is not "slow in general".

I subscribed James Page (feel free to reassign) as an expert on how our
OpenStack uses Ceph to compare what you might describe.

So I assume to be able to begin - it comes down to identify what is different in your setup.
Which starts at describing how you set it up and hopefully our ceph people spot a difference that can be tried by you to see if it changes things. Once that way we find what makes the difference it can either be debugged and fixed (if it is a bug) or just be configured differently (if it is a config issue).

** No longer affects: ubuntu

** Also affects: ceph (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: ceph (Ubuntu)
       Status: New => Incomplete

** Changed in: libvirt (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/2035225

Title:
  libvirtd failed to open the RBD image

Status in ceph package in Ubuntu:
  Incomplete
Status in libvirt package in Ubuntu:
  Incomplete

Bug description:
  using libvirtd with a ceph pool, when i iusse the command 
  virsh vol-list $POOLNAME
   it takes minutes to respond and into the syslog I have a list of errors like this

  Sep 12 15:06:28 op3 libvirtd[6987]: failed to open the RBD image 'arss-sys': No such file or directory
  Sep 12 15:06:58 op3 libvirtd[6987]: failed to open the RBD image 'A2-wp-staging': No such file or directory
  Sep 12 15:07:28 op3 libvirtd[6987]: failed to open the RBD image 'FS-L': No such file or directory
  Sep 12 15:14:40 op3 libvirtd[6987]: failed to open the RBD image 'DocsPA-share-C': No such file or directory
  Sep 12 15:15:10 op3 libvirtd[6987]: failed to open the RBD image 'A2_ST_MIUR': No such file or directory
  Sep 12 15:15:44 op3 libvirtd[6987]: failed to open the RBD image 'ndc01-1': No such file or directory
  Sep 12 15:16:16 op3 libvirtd[6987]: failed to open the RBD image 'arss-sys': No such file or directory

  
  but every image is present, for example

  rbd ls SAS|grep arss-sys
  arss-sys

  
  Every failed image is in use by another server via kernel rbd module (rbd map).

  
  lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description:    Ubuntu 20.04.6 LTS
  Release:        20.04
  Codename:       focal

  dpkg -l |egrep "libvirt|ceph"
  ii  ceph-common                           15.2.17-0ubuntu0.20.04.4              amd64        common utilities to mount and interact with a ceph storage cluster
  ii  gir1.2-libvirt-glib-1.0:amd64         3.0.0-1                               amd64        GObject introspection files for the libvirt-glib library
  ii  libcephfs2                            15.2.17-0ubuntu0.20.04.4              amd64        Ceph distributed file system client library
  ii  libvirt-clients                       6.0.0-0ubuntu8.16                     amd64        Programs for the libvirt library
  ii  libvirt-daemon                        6.0.0-0ubuntu8.16                     amd64        Virtualization daemon
  ii  libvirt-daemon-driver-qemu            6.0.0-0ubuntu8.16                     amd64        Virtualization daemon QEMU connection driver
  ii  libvirt-daemon-driver-storage-rbd     6.0.0-0ubuntu8.16                     amd64        Virtualization daemon RBD storage driver
  ii  libvirt-daemon-system                 6.0.0-0ubuntu8.16                     amd64        Libvirt daemon configuration files
  ii  libvirt-daemon-system-systemd         6.0.0-0ubuntu8.16                     amd64        Libvirt daemon configuration files (systemd)
  ii  libvirt-glib-1.0-0:amd64              3.0.0-1                               amd64        libvirt GLib and GObject mapping library
  ii  libvirt0:amd64                        6.0.0-0ubuntu8.16                     amd64        library for interfacing with different virtualization systems
  ii  python3-ceph-argparse                 15.2.17-0ubuntu0.20.04.4              amd64        Python 3 utility libraries for Ceph CLI
  ii  python3-ceph-common                   15.2.17-0ubuntu0.20.04.4              all          Python 3 utility libraries for Ceph
  ii  python3-cephfs                        15.2.17-0ubuntu0.20.04.4              amd64        Python 3 libraries for the Ceph libcephfs library
  ii  python3-libvirt                       6.1.0-1                               amd64        libvirt Python 3 bindings

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