Package: multipath-tools
Version: 0.6.1-3
When using parted to create partitions, multipath partition device
files are created using kernel names rather than honoring the "-p
-part" option in the various udev rules. This issue exists in
multipath-tools/kpartx_0.6.1-3, but has been seen in earlier versions
of multipath-tools/kpartx as well.
Example:
Testing on an amd64 system running sid with
multipath-tools/kpartx_0.6.1-3 from experimental. We hav 8 FC LUNs
with 4 paths each. The kernel version is 4.6.0-1-amd64.
With the following /etc/multipath.conf file:
defaults {
user_friendly_names "yes"
}
blacklist {
device {
vendor "HP"
product "LOGICAL VOLUME"
}
Here are the devices used (the boot device is blacklisted):
# lsscsi
[0:0:0:0] storage HP P244br 2.52 -
[0:1:0:0] disk HP LOGICAL VOLUME 2.52 /dev/sda
[1:0:0:0] disk 3PARdata VV 3212 /dev/sdj
[1:0:0:1] disk 3PARdata VV 3212 /dev/sdl
[1:0:0:2] disk 3PARdata VV 3212 /dev/sdn
[1:0:0:3] disk 3PARdata VV 3212 /dev/sdq
[1:0:0:4] disk 3PARdata VV 3212 /dev/sdr
[1:0:0:5] disk 3PARdata VV 3212 /dev/sdt
[1:0:0:6] disk 3PARdata VV 3212 /dev/sdv
[1:0:0:7] disk 3PARdata VV 3212 /dev/sdx
[1:0:0:254] enclosu 3PARdata SES 3212 -
[1:0:1:0] disk 3PARdata VV 3212 /dev/sdz
[1:0:1:1] disk 3PARdata VV 3212 /dev/sdaa
[1:0:1:2] disk 3PARdata VV 3212 /dev/sdab
[1:0:1:3] disk 3PARdata VV 3212 /dev/sdac
[1:0:1:4] disk 3PARdata VV 3212 /dev/sdad
[1:0:1:5] disk 3PARdata VV 3212 /dev/sdae
[1:0:1:6] disk 3PARdata VV 3212 /dev/sdaf
[1:0:1:7] disk 3PARdata VV 3212 /dev/sdag
[1:0:1:254] enclosu 3PARdata SES 3212 -
[2:0:0:0] disk 3PARdata VV 3212 /dev/sdb
[2:0:0:1] disk 3PARdata VV 3212 /dev/sdc
[2:0:0:2] disk 3PARdata VV 3212 /dev/sdd
[2:0:0:3] disk 3PARdata VV 3212 /dev/sde
[2:0:0:4] disk 3PARdata VV 3212 /dev/sdf
[2:0:0:5] disk 3PARdata VV 3212 /dev/sdg
[2:0:0:6] disk 3PARdata VV 3212 /dev/sdh
[2:0:0:7] disk 3PARdata VV 3212 /dev/sdi
[2:0:0:254] enclosu 3PARdata SES 3212 -
[2:0:1:0] disk 3PARdata VV 3212 /dev/sdk
[2:0:1:1] disk 3PARdata VV 3212 /dev/sdm
[2:0:1:2] disk 3PARdata VV 3212 /dev/sdo
[2:0:1:3] disk 3PARdata VV 3212 /dev/sdp
[2:0:1:4] disk 3PARdata VV 3212 /dev/sds
[2:0:1:5] disk 3PARdata VV 3212 /dev/sdu
[2:0:1:6] disk 3PARdata VV 3212 /dev/sdw
[2:0:1:7] disk 3PARdata VV 3212 /dev/sdy
[2:0:1:254] enclosu 3PARdata SES 3212 -
And the following multipath -l output:
# multipath -l
mpathe (360002ac00000000000001908000028be) dm-4 3PARdata,VV
size=1.0G features='0' hwhandler='0' wp=rw
`-+- policy='service-time 0' prio=0 status=active
|- 1:0:0:4 sdr 65:16 active undef running
|- 1:0:1:4 sdad 65:208 active undef running
|- 2:0:0:4 sdf 8:80 active undef running
`- 2:0:1:4 sds 65:32 active undef running
mpathd (360002ac00000000000001907000028be) dm-3 3PARdata,VV
size=1.0G features='0' hwhandler='0' wp=rw
`-+- policy='service-time 0' prio=0 status=active
|- 1:0:0:3 sdq 65:0 active undef running
|- 1:0:1:3 sdac 65:192 active undef running
|- 2:0:0:3 sde 8:64 active undef running
`- 2:0:1:3 sdp 8:240 active undef running
mpathc (360002ac00000000000001906000028be) dm-2 3PARdata,VV
size=1.0G features='0' hwhandler='0' wp=rw
`-+- policy='service-time 0' prio=0 status=active
|- 1:0:0:2 sdn 8:208 active undef running
|- 1:0:1:2 sdab 65:176 active undef running
|- 2:0:0:2 sdd 8:48 active undef running
`- 2:0:1:2 sdo 8:224 active undef running
mpathb (360002ac00000000000001905000028be) dm-1 3PARdata,VV
size=1.0G features='0' hwhandler='0' wp=rw
`-+- policy='service-time 0' prio=0 status=active
|- 1:0:0:1 sdl 8:176 active undef running
|- 1:0:1:1 sdaa 65:160 active undef running
|- 2:0:0:1 sdc 8:32 active undef running
`- 2:0:1:1 sdm 8:192 active undef running
mpatha (360002ac00000000000001904000028be) dm-0 3PARdata,VV
size=1.0G features='0' hwhandler='0' wp=rw
`-+- policy='service-time 0' prio=0 status=active
|- 1:0:0:0 sdj 8:144 active undef running
|- 1:0:1:0 sdz 65:144 active undef running
|- 2:0:0:0 sdb 8:16 active undef running
`- 2:0:1:0 sdk 8:160 active undef running
mpathh (360002ac0000000000000190b000028be) dm-7 3PARdata,VV
size=1.0G features='0' hwhandler='0' wp=rw
`-+- policy='service-time 0' prio=0 status=active
|- 1:0:0:7 sdx 65:112 active undef running
|- 1:0:1:7 sdag 66:0 active undef running
|- 2:0:0:7 sdi 8:128 active undef running
`- 2:0:1:7 sdy 65:128 active undef running
mpathg (360002ac0000000000000190a000028be) dm-6 3PARdata,VV
size=1.0G features='0' hwhandler='0' wp=rw
`-+- policy='service-time 0' prio=0 status=active
|- 1:0:0:6 sdv 65:80 active undef running
|- 1:0:1:6 sdaf 65:240 active undef running
|- 2:0:0:6 sdh 8:112 active undef running
`- 2:0:1:6 sdw 65:96 active undef running
mpathf (360002ac00000000000001909000028be) dm-5 3PARdata,VV
size=1.0G features='0' hwhandler='0' wp=rw
`-+- policy='service-time 0' prio=0 status=active
|- 1:0:0:5 sdt 65:48 active undef running
|- 1:0:1:5 sdae 65:224 active undef running
|- 2:0:0:5 sdg 8:96 active undef running
`- 2:0:1:5 sdu 65:64 active undef running
With the following device files in /dev/mapper:
# ls -l /dev/mapper
total 0
crw------- 1 root root 10, 236 Jun 14 13:28 control
lrwxrwxrwx 1 root root 7 Jun 14 13:53 mpatha -> ../dm-0
lrwxrwxrwx 1 root root 7 Jun 14 13:53 mpathb -> ../dm-1
lrwxrwxrwx 1 root root 7 Jun 14 13:53 mpathc -> ../dm-2
lrwxrwxrwx 1 root root 7 Jun 14 13:53 mpathd -> ../dm-3
lrwxrwxrwx 1 root root 7 Jun 14 13:53 mpathe -> ../dm-4
lrwxrwxrwx 1 root root 7 Jun 14 13:53 mpathf -> ../dm-5
lrwxrwxrwx 1 root root 7 Jun 14 13:53 mpathg -> ../dm-6
lrwxrwxrwx 1 root root 7 Jun 14 13:53 mpathh -> ../dm-7
We then run parted on /dev/mapper/mpatha and create a label and a partition:
# parted /dev/mapper/mpatha
GNU Parted 3.2
Using /dev/mapper/mpatha
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) mklabel gptWarning: The existing disk label on /dev/mapper/mpatha will
be destroyed and all
data on this disk will be lost. Do you want to continue?
Yes/No? yes
(parted) mkpart primary ext2 0 100%
Warning: The resulting partition is not properly aligned for best performance.
Ignore/Cancel? i
(parted) quit
Information: You may need to update /etc/fstab.
Under /dev/mapper, we see:
# ls -l /dev/mapper
total 0
crw------- 1 root root 10, 236 Jun 14 13:28 control
lrwxrwxrwx 1 root root 7 Jun 14 13:57 mpatha -> ../dm-0
lrwxrwxrwx 1 root root 7 Jun 14 13:56 mpatha1 -> ../dm-8
lrwxrwxrwx 1 root root 7 Jun 14 13:53 mpathb -> ../dm-1
lrwxrwxrwx 1 root root 7 Jun 14 13:53 mpathc -> ../dm-2
lrwxrwxrwx 1 root root 7 Jun 14 13:53 mpathd -> ../dm-3
lrwxrwxrwx 1 root root 7 Jun 14 13:53 mpathe -> ../dm-4
lrwxrwxrwx 1 root root 7 Jun 14 13:53 mpathf -> ../dm-5
lrwxrwxrwx 1 root root 7 Jun 14 13:53 mpathg -> ../dm-6
lrwxrwxrwx 1 root root 7 Jun 14 13:53 mpathh -> ../dm-7
Note that we see /dev/mapper/mpatha1 instead of /dev/mapper/mpatha-part1.
Here is the udevadm monitor output during the partition creation:
KERNEL[1654.655670] change /devices/virtual/block/dm-0 (block)
UDEV [1654.674470] change /devices/virtual/block/dm-0 (block)
KERNEL[1686.963300] add /devices/virtual/bdi/254:8 (bdi)
KERNEL[1686.963443] add /devices/virtual/block/dm-8 (block)
UDEV [1686.963889] add /devices/virtual/bdi/254:8 (bdi)
KERNEL[1686.963916] change /devices/virtual/block/dm-8 (block)
UDEV [1686.972372] add /devices/virtual/block/dm-8 (block)
UDEV [1686.999211] change /devices/virtual/block/dm-8 (block)
KERNEL[1699.598572] change /devices/virtual/block/dm-0 (block)
KERNEL[1699.616084] add /devices/virtual/bdi/254:9 (bdi)
KERNEL[1699.616215] add /devices/virtual/block/dm-9 (block)
KERNEL[1699.616533] remove /devices/virtual/block/dm-9 (block)
UDEV [1699.616728] add /devices/virtual/bdi/254:9 (bdi)
UDEV [1699.620321] add /devices/virtual/block/dm-9 (block)
UDEV [1699.620427] remove /devices/virtual/block/dm-9 (block)
KERNEL[1699.640199] remove /devices/virtual/bdi/254:9 (bdi)
UDEV [1699.640289] remove /devices/virtual/bdi/254:9 (bdi)
UDEV [1699.664986] change /devices/virtual/block/dm-0 (block)
This work properly when using fdisk:
fdisk /dev/mapper/mpathb
Welcome to fdisk (util-linux 2.28).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Command (m for help): n
Partition type
p primary (0 primary, 0 extended, 4 free)
e extended (container for logical partitions)
Select (default p): p
Partition number (1-4, default 1): 1
First sector (32768-2097151, default 32768):
Last sector, +sectors or +size{K,M,G,T,P} (32768-2097151, default 2097151):
Created a new partition 1 of type 'Linux' and of size 1008 MiB.
Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table.
Re-reading the partition table failed.: Invalid argument
The kernel still uses the old table. The new table will be used at the next
reboot or after you run partprobe(8) or kpartx(8).
# ls -l /dev/mapper
total 0
crw------- 1 root root 10, 236 Jun 14 13:28 control
lrwxrwxrwx 1 root root 7 Jun 14 14:00 mpatha -> ../dm-0
lrwxrwxrwx 1 root root 7 Jun 14 14:00 mpatha1 -> ../dm-8
lrwxrwxrwx 1 root root 7 Jun 14 14:01 mpathb -> ../dm-1
lrwxrwxrwx 1 root root 7 Jun 14 14:01 mpathb-part1 -> ../dm-9
lrwxrwxrwx 1 root root 7 Jun 14 14:00 mpathc -> ../dm-2
lrwxrwxrwx 1 root root 7 Jun 14 14:00 mpathd -> ../dm-3
lrwxrwxrwx 1 root root 7 Jun 14 14:00 mpathe -> ../dm-4
lrwxrwxrwx 1 root root 7 Jun 14 14:00 mpathf -> ../dm-5
lrwxrwxrwx 1 root root 7 Jun 14 14:00 mpathg -> ../dm-6
lrwxrwxrwx 1 root root 7 Jun 14 14:00 mpathh -> ../dm-7
KERNEL[1988.516908] change /devices/virtual/block/dm-1 (block)
KERNEL[1988.547294] add /devices/virtual/bdi/254:9 (bdi)
KERNEL[1988.547364] add /devices/virtual/block/dm-9 (block)
KERNEL[1988.547807] change /devices/virtual/block/dm-9 (block)
UDEV [1988.547918] add /devices/virtual/bdi/254:9 (bdi)
UDEV [1988.548599] change /devices/virtual/block/dm-1 (block)
UDEV [1988.556555] add /devices/virtual/block/dm-9 (block)
UDEV [1988.572788] change /devices/virtual/block/dm-9 (block)
We have the same issue regardless of the friendly_user_names setting.
