[ovirt-users] Re: unable to create iSCSI storage domain

On Fri, Jun 22, 2018 at 6:48 PM Bernhard Dick <bernhard(a)bdick.de <mailto:bernhard@bdick.de>> wrote: Am 22.06.2018 um 17:38 schrieb Nir Soffer: > On Fri, Jun 22, 2018 at 6:22 PM Bernhard Dick <bernhard(a)bdick.de <mailto:bernhard@bdick.de> > <mailto:bernhard@bdick.de <mailto:bernhard@bdick.de>>> wrote: [...] Is sdc your LUN? here sdc is from the storage, sdd is from the linux based target. > multipath -ll No Output You don't have any multipath devices. oVirt block storage is using only multipath devices. This means that you will no see any devices on engine side. > cat /etc/multipath.conf # VDSM REVISION 1.3 # VDSM PRIVATE # VDSM REVISION 1.5 You are mixing several versions here. Is this 1.3 or 1.5 file?

# This file is managed by vdsm. # [...] defaults {      # [...]      polling_interval            5      # [...]      no_path_retry               4 According to this this is a 1.5 version.      # [...]      user_friendly_names         no      # [...]      flush_on_last_del           yes      # [...]      fast_io_fail_tmo            5      # [...]      dev_loss_tmo                30      # [...]      max_fds                     4096 } # Remove devices entries when overrides section is available. devices {      device {          # [...]          all_devs                yes          no_path_retry           4      } } # [...] # inserted by blacklist_all_disks.sh blacklist {          devnode "*" } This is your issue - why do you blacklist all devices? By lsblk output I think you are running hyperconverge setup, which wrongly disabled all multipath devices, instead of the local devices used by gluster. To fix this: 1. Remove the wrong multipath blacklist 2. Find the WWID of the local devices used by gluster    these are /dev/sda and /dev/sdb 3. Add blacklist for these specific devices using blacklist {     wwid XXX-YYY     wwid YYY-ZZZ } With this you should be able to access all LUNs from the storage server (assuming you configured the storage so the host can see them). Finally, it is recommended to use a drop-in configuration file for local changes, and *never* touch /etc/multipath.conf, so vdsm is able to manage this file. This is done by putting your changes in: /etc/multipath/conf.d/local.conf Example: $ cat /etc/multipath/conf.d/local.conf # Local multipath configuration for host XXX # blacklist boot device and device used for gluster storage. blacklist {     wwid XXX-YYY     wwid YYY-ZZZ } You probably want to backup these files and have a script to deploy them to the hosts if you need to restore the setup. Once you have a proper drop-in configuration, you can use the standard vdsm multipath configuration by removing the line # VDSM PRIVATE And running:     vdsm-tool configure --force --module multipath

In EL7.6 we expect to have a fix for this issue, blacklisting automatically local devices. See https://bugzilla.redhat.com/1593459 > vdsm-client Host getDeviceList [] Expected in this configuration. > Nir > >     When I logon to the ovirt hosts I see that they are connected with the >     target LUNs (dmesg is telling that there are iscsi devices being found >     and they are getting assigned to devices in /dev/sdX ). Writing and >     reading from the devices (also accros hosts) works. Do you have some >     advice how to troubleshoot this? > >         Regards >           Bernhard >     _______________________________________________ >     Users mailing list -- users(a)ovirt.org <mailto:users@ovirt.org> <mailto:users@ovirt.org <mailto:users@ovirt.org>> >     To unsubscribe send an email to users-leave(a)ovirt.org <mailto:users-leave@ovirt.org> >     <mailto:users-leave@ovirt.org <mailto:users-leave@ovirt.org>> >     Privacy Statement: https://www.ovirt.org/site/privacy-policy/ >     oVirt Code of Conduct: > https://www.ovirt.org/community/about/community-guidelines/ >     List Archives: > https://lists.ovirt.org/archives/list/users@ovirt.org/message/45IIDJUVOCN... > -- Dipl.-Inf. Bernhard Dick Auf dem Anger 24 DE-46485 Wesel www.BernhardDick.de <http://www.BernhardDick.de> jabber: bernhard(a)jabber.bdick.de <mailto:bernhard@jabber.bdick.de> Tel : +49.2812068620 <tel:+49%20281%202068620> Mobil : +49.1747607927 <tel:+49%20174%207607927> FAX : +49.2812068621 <tel:+49%20281%202068621> USt-IdNr.: DE274728845