Bonjour, I'm not familiar with RHEL7 but willing to learn ;-) I recently ran into confusing situations regarding the content of /dev/disk/by-partuuid because partprobe was not called when it should have (ubuntu). On RHEL, kpartx is used instead because partprobe reboots, apparently. What is the content of /dev/disk/by-partuuid on your machine ? ls -l /dev/disk/by-partuuid Cheers On 09/10/2014 12:24, SCHAER Frederic wrote: > Hi, > > > > I am setting up a test ceph cluster, on decommissioned hardware (hence : not optimal, I know). > > I have installed CentOS7, installed and setup ceph mons and OSD machines using puppet, and now I’m trying to add OSDs with the servers OSD disks… and I have issues (of course ;) ) > > I used the Ceph RHEL7 RPMs (ceph-0.80.6-0.el7.x86_64) > > > > When I run “ceph-disk prepare” for a disk, I most of the time (but not always) get the partitions created, but not activated : > > > > [root@ceph4 ~]# ceph-disk list|grep sdh > > WARNING:ceph-disk:Old blkid does not support ID_PART_ENTRY_* fields, trying sgdisk; may not correctly identify ceph volumes with dmcrypt > > /dev/sdh : > > /dev/sdh1 ceph data, prepared, cluster ceph, journal /dev/sdh2 > > /dev/sdh2 ceph journal, for /dev/sdh1 > > > > I tried to debug udev rules thinking they were not launched to activate the OSD, but they are, and they fail on this error : > > > > + ln -sf ../../sdh2 /dev/disk/by-partuuid/5b3bde8f-ccad-4093-a8a5-ad6413ae8931 > > + mkdir -p /dev/disk/by-parttypeuuid > > + ln -sf ../../sdh2 /dev/disk/by-parttypeuuid/45b0969e-9b03-4f30-b4c6-b4b80ceff106.5b3bde8f-ccad-4093-a8a5-ad6413ae8931 > > + case $ID_PART_ENTRY_TYPE in > > + /usr/sbin/ceph-disk -v activate-journal /dev/sdh2 > > INFO:ceph-disk:Running command: /usr/bin/ceph-osd -i 0 --get-journal-uuid --osd-journal /dev/sdh2 > > SG_IO: bad/missing sense data, sb[]: 70 00 05 00 00 00 00 0b 00 00 00 00 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > > DEBUG:ceph-disk:Journal /dev/sdh2 has OSD UUID 00000000-0000-0000-0000-000000000000 > > INFO:ceph-disk:Running command: /sbin/blkid -p -s TYPE -ovalue -- /dev/disk/by-partuuid/00000000-0000-0000-0000-000000000000 > > error: /dev/disk/by-partuuid/00000000-0000-0000-0000-000000000000: No such file or directory > > ceph-disk: Cannot discover filesystem type: device /dev/disk/by-partuuid/00000000-0000-0000-0000-000000000000: Command '/sbin/blkid' returned non-zero exit status 2 > > + exit > > + exec > > > > You’ll notice the zeroed UUID… > > Because of this, I looked at the output of ceph-disk prepare, and saw that partx complains at the end (this is the partx –a command) : > > > > Warning: The kernel is still using the old partition table. > > The new table will be used at the next reboot. > > The operation has completed successfully. > > partx: /dev/sdh: error adding partitions 1-2 > > > > And indeed, running “partx –a /dev/sdh” does not change anything. > > But I just discovered that running “partx –u /dev/sdh” will fix everything ….???? > > I.e : right after I send this update command to the kernel, my debug logs show that the udev rule does everything fine and the OSD starts up. > > > > I’m therefore wondering what I did wrong ? > > is this CentOS 7 that is misbehaving, or the kernel, or…? > > Any reason why partx –a is used instead of partx –u ? > > > > I’d be glad to hear others advice on this ! > > Thanks && regards > > > > Frederic Schaer > > > > > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > -- Loïc Dachary, Artisan Logiciel Libre
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