Issus with device-mapper drive partition names.

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When trying to zap and prepare a disk it fails to find the partitions.

[ceph@ceph0-mon0 ~]$ ceph-deploy -v disk zap ceph0-node1:/dev/mapper/35000c50031a1c08b

[ceph_deploy.conf][DEBUG ] found configuration file at: /home/ceph/.cephdeploy.conf

[ceph_deploy.cli][INFO  ] Invoked (1.5.21): /usr/bin/ceph-deploy -v disk zap ceph0-node1:/dev/mapper/35000c50031a1c08b

[ceph_deploy.osd][DEBUG ] zapping /dev/mapper/35000c50031a1c08b on ceph0-node1

[ceph0-node1][DEBUG ] connection detected need for sudo

[ceph0-node1][DEBUG ] connected to host: ceph0-node1 

[ceph0-node1][DEBUG ] detect platform information from remote host

[ceph0-node1][DEBUG ] detect machine type

[ceph_deploy.osd][INFO  ] Distro info: CentOS Linux 7.0.1406 Core

[ceph0-node1][DEBUG ] zeroing last few blocks of device

[ceph0-node1][DEBUG ] find the location of an executable

[ceph0-node1][INFO  ] Running command: sudo /usr/sbin/ceph-disk zap /dev/mapper/35000c50031a1c08b

[ceph0-node1][DEBUG ] Creating new GPT entries.

[ceph0-node1][DEBUG ] Warning: The kernel is still using the old partition table.

[ceph0-node1][DEBUG ] The new table will be used at the next reboot.

[ceph0-node1][DEBUG ] GPT data structures destroyed! You may now partition the disk using fdisk or

[ceph0-node1][DEBUG ] other utilities.

[ceph0-node1][DEBUG ] Warning: The kernel is still using the old partition table.

[ceph0-node1][DEBUG ] The new table will be used at the next reboot.

[ceph0-node1][DEBUG ] The operation has completed successfully.

[ceph_deploy.osd][INFO  ] calling partx on zapped device /dev/mapper/35000c50031a1c08b

[ceph_deploy.osd][INFO  ] re-reading known partitions will display errors

[ceph0-node1][INFO  ] Running command: sudo partx -a /dev/mapper/35000c50031a1c08b


Now running prepare fails because it can't find the newly created partitions.


[ceph@ceph0-mon0 ~]$ ceph-deploy -v osd prepare ceph0-node1:/dev/mapper/35000c50031a1c08b


[ceph_deploy.conf][DEBUG ] found configuration file at: /home/ceph/.cephdeploy.conf

[ceph_deploy.cli][INFO  ] Invoked (1.5.21): /usr/bin/ceph-deploy -v osd prepare ceph0-node1:/dev/mapper/35000c50031a1c08b

[ceph_deploy.osd][DEBUG ] Preparing cluster ceph disks ceph0-node1:/dev/mapper/35000c50031a1c08b:

[ceph0-node1][DEBUG ] connection detected need for sudo

[ceph0-node1][DEBUG ] connected to host: ceph0-node1 

[ceph0-node1][DEBUG ] detect platform information from remote host

[ceph0-node1][DEBUG ] detect machine type

[ceph_deploy.osd][INFO  ] Distro info: CentOS Linux 7.0.1406 Core

[ceph_deploy.osd][DEBUG ] Deploying osd to ceph0-node1

[ceph0-node1][DEBUG ] write cluster configuration to /etc/ceph/{cluster}.conf

[ceph0-node1][INFO  ] Running command: sudo udevadm trigger --subsystem-match=block --action="">

[ceph_deploy.osd][DEBUG ] Preparing host ceph0-node1 disk /dev/mapper/35000c50031a1c08b journal None activate False

[ceph0-node1][INFO  ] Running command: sudo ceph-disk -v prepare --fs-type xfs --cluster ceph -- /dev/mapper/35000c50031a1c08b

[ceph0-node1][WARNIN] INFO:ceph-disk:Running command: /usr/bin/ceph-osd --cluster=ceph --show-config-value=fsid

[ceph0-node1][WARNIN] INFO:ceph-disk:Running command: /usr/bin/ceph-conf --cluster=ceph --name=osd. --lookup osd_mkfs_options_xfs

[ceph0-node1][WARNIN] INFO:ceph-disk:Running command: /usr/bin/ceph-conf --cluster=ceph --name=osd. --lookup osd_fs_mkfs_options_xfs

[ceph0-node1][WARNIN] INFO:ceph-disk:Running command: /usr/bin/ceph-conf --cluster=ceph --name=osd. --lookup osd_mount_options_xfs

[ceph0-node1][WARNIN] INFO:ceph-disk:Running command: /usr/bin/ceph-conf --cluster=ceph --name=osd. --lookup osd_fs_mount_options_xfs

[ceph0-node1][WARNIN] INFO:ceph-disk:Running command: /usr/bin/ceph-osd --cluster=ceph --show-config-value=osd_journal_size

[ceph0-node1][WARNIN] INFO:ceph-disk:Will colocate journal with data on /dev/mapper/35000c50031a1c08b

[ceph0-node1][WARNIN] DEBUG:ceph-disk:Creating journal partition num 2 size 10000 on /dev/mapper/35000c50031a1c08b

[ceph0-node1][WARNIN] INFO:ceph-disk:Running command: /sbin/sgdisk --new=2:0:10000M --change-name=2:ceph journal --partition-guid=2:b9202d1b-63be-4deb-ad08-0a143a31f4a9 --typecode=2:45b0969e-9b03-4f30-b4c6-b4b80ceff106 --mbrtogpt -- /dev/mapper/35000c50031a1c08b

[ceph0-node1][DEBUG ] Information: Moved requested sector from 34 to 2048 in

[ceph0-node1][DEBUG ] order to align on 2048-sector boundaries.

[ceph0-node1][DEBUG ] Warning: The kernel is still using the old partition table.

[ceph0-node1][DEBUG ] The new table will be used at the next reboot.

[ceph0-node1][DEBUG ] The operation has completed successfully.

[ceph0-node1][WARNIN] INFO:ceph-disk:calling partx on prepared device /dev/mapper/35000c50031a1c08b

[ceph0-node1][WARNIN] INFO:ceph-disk:re-reading known partitions will display errors

[ceph0-node1][WARNIN] INFO:ceph-disk:Running command: /sbin/partx -a /dev/mapper/35000c50031a1c08b

[ceph0-node1][WARNIN] partx: /dev/mapper/35000c50031a1c08b: error adding partition 2

[ceph0-node1][WARNIN] INFO:ceph-disk:Running command: /usr/bin/udevadm settle

[ceph0-node1][WARNIN] DEBUG:ceph-disk:Journal is GPT partition /dev/disk/by-partuuid/b9202d1b-63be-4deb-ad08-0a143a31f4a9

[ceph0-node1][WARNIN] DEBUG:ceph-disk:Creating osd partition on /dev/mapper/35000c50031a1c08b

[ceph0-node1][WARNIN] INFO:ceph-disk:Running command: /sbin/sgdisk --largest-new=1 --change-name=1:ceph data --partition-guid=1:3d89f923-24d4-4db7-ac46-802c625a6af1 --typecode=1:89c57f98-2fe5-4dc0-89c1-f3ad0ceff2be -- /dev/mapper/35000c50031a1c08b

[ceph0-node1][DEBUG ] Information: Moved requested sector from 20480001 to 20482048 in

[ceph0-node1][DEBUG ] order to align on 2048-sector boundaries.

[ceph0-node1][DEBUG ] Warning: The kernel is still using the old partition table.

[ceph0-node1][DEBUG ] The new table will be used at the next reboot.

[ceph0-node1][DEBUG ] The operation has completed successfully.

[ceph0-node1][WARNIN] INFO:ceph-disk:Running command: /sbin/partprobe /dev/mapper/35000c50031a1c08b

[ceph0-node1][WARNIN] device-mapper: remove ioctl on 35000c50031a1c08b2 failed: Device or resource busy

[ceph0-node1][WARNIN] device-mapper: remove ioctl on 35000c50031a1c08b1 failed: Device or resource busy

[ceph0-node1][WARNIN] Warning: parted was unable to re-read the partition table on /dev/mapper/35000c50031a1c08b (Device or resource busy).  This means Linux won't know anything about the modifications you made. 

[ceph0-node1][WARNIN] device-mapper: create ioctl on 35000c50031a1c08b1 failed: Device or resource busy

[ceph0-node1][WARNIN] device-mapper: remove ioctl on 35000c50031a1c08b1 failed: Device or resource busy

[ceph0-node1][WARNIN] device-mapper: create ioctl on 35000c50031a1c08b2 failed: Device or resource busy

[ceph0-node1][WARNIN] device-mapper: remove ioctl on 35000c50031a1c08b2 failed: Device or resource busy

[ceph0-node1][WARNIN] INFO:ceph-disk:Running command: /usr/bin/udevadm settle

[ceph0-node1][WARNIN] ceph-disk: Error: partition 1 for /dev/mapper/35000c50031a1c08b does not appear to exist

[ceph0-node1][ERROR ] RuntimeError: command returned non-zero exit status: 1

[ceph_deploy.osd][ERROR ] Failed to execute command: ceph-disk -v prepare --fs-type xfs --cluster ceph -- /dev/mapper/35000c50031a1c08b

[ceph_deploy][ERROR ] GenericError: Failed to create 1 OSDs



However it successfully partitions the disk and they do show up instantly.


lrwxrwxrwx 1 root root       7 Feb 12 17:06 35000c50031a1c08b -> ../dm-2

lrwxrwxrwx 1 root root       8 Feb 12 17:06 35000c50031a1c08b1 -> ../dm-17

lrwxrwxrwx 1 root root       8 Feb 12 17:06 35000c50031a1c08b2 -> ../dm-16


[root@ceph0-node1 mapper]# parted 35000c50031a1c08b

GNU Parted 3.1

Using /dev/dm-2

Welcome to GNU Parted! Type 'help' to view a list of commands.

(parted) print                                                            

Model: Linux device-mapper (multipath) (dm)

Disk /dev/dm-2: 300GB

Sector size (logical/physical): 512B/512B

Partition Table: gpt

Disk Flags: 


Number  Start   End     Size    File system  Name          Flags

 2      1049kB  10.5GB  10.5GB               ceph journal

 1      10.5GB  300GB   290GB                ceph data



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