Hi David As I test yesterday, there is no same behavior on Ubuntu 12.4(LTS).
I extract the initrd ramdisk of initrd.img-3.0.0-12-server(U11.10) And initrd.img-3.2.0-20-generic(U12.04).There is no multipath.conf. Compare the lvm.conf and modrprobe.d/blacklist.conf in ramdisk, there is no any difference. I have done the test many times and on two host separately. The issue only affect partition 1 undoubtedly. At least we know Ubuntu 12.4 has no problem now, so what's difference between Them related to multipath-tools and lvm, code, configuration file etc? Due to this is a bug, does Ubuntu will have a fix or patch on major release 11? Vincent Chen EMC2 | E-Lab Linux team -----Original Message----- From: boun...@canonical.com [mailto:boun...@canonical.com] On Behalf Of David Duffey Sent: Friday, April 27, 2012 3:35 AM To: Chen, Vincent Subject: [Bug 985741] Re: multipath can't show device on which is setup lvm Hi Vencent, The initial ramdisk includes modules, configuration files, and scripts needed to boot the system. Since everything works post-boot, I suspect that some initialization is the problem. After looking through your information I am almost certain this is because during the init process LVM is grabbing the block devices BEFORE multipath gets the chance. Do you see that after the boot your volume groups are using scsi major numbers (8) instead of multipath (252)? It doesn't explain everything.. I would expect this to be a problem even for the second partition, not only when you create an LVM on partition 1. Nor does it explain why the volume group doesn't come up, yet it found it's PVs (directly instead of using the correct multipath). Take a look at this bug report, it is a familiar problem. You might have to recreate an initrd with the correct multipath and lvm config files, and also make sure the kernel modules you need are loaded. https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/246324 Sorry I do not have 11.10 installed or I would try to dig a bit deeper. Canonical does have a Technical Partner Program for vendors that want to have a formal relationship (technical partner manager) to make their devices work well out-of-the-box with Ubuntu. David -- You received this bug notification because you are subscribed to the bug report. https://bugs.launchpad.net/bugs/985741 Title: multipath can't show device on which is setup lvm Status in “multipath-tools” package in Ubuntu: Confirmed Bug description: root@SGELLIN119:~# lsb_release -rd Description: Ubuntu 11.10 Release: 11.10 affect package: multipath-tools, lvm2 If creating logical volume with Multipath on disk primary partition 1, multipath can’t find the disks. Syslog show such error when booting system kernel: [ 27.604034] device-mapper: table: 252:5: multipath: error getting device kernel: [ 27.604115] device-mapper: ioctl: error adding target to table I use fdisk to create two partitions on one physical lun. Mpath6: /dev/mapper/mpath6-part1 /dev/mapper/mpath6-part2 Mpath7: /dev/mapper/mpath7-part1 /dev/mapper/mpath7-part2 create a logical volume on mpath6-part2, mpath7-part2 Reboot host, there is no exception and error logs. Multipath could Find all devices. root@SGELLIN119:~# multipath -ll | grep SYMM mpath9 (360000970000192602316533030453335) dm-10 EMC,SYMMETRIX mpath8 (360000970000192602316533030453334) dm-6 EMC,SYMMETRIX mpath7 (360000970000192602316533030453333) dm-7 EMC,SYMMETRIX mpath6 (360000970000192602316533030453332) dm-4 EMC,SYMMETRIX mpath5 (360000970000192602316533030453331) dm-3 EMC,SYMMETRIX root@SGELLIN119:~# lvs -v Finding all logical volumes LV VG #Seg Attr LSize Maj Min KMaj KMin Origin Snap% Move Copy% Log Convert LV UUID mlv my_vg 1 -wi-a- 1020.00m -1 -1 252 22 c3cECW-CJry-OdXI-O9bZ-lXq8-BUYq-obzcvB sym_lv2 sym_vg2 2 -wi-a- 200.00m -1 -1 252 20 1t9SZa-QEEm-2u6p-lCqN-aqcd-xOpn-dC1YAu sym_lv3 sym_vg3 2 -wi-a- 200.00m -1 -1 252 21 w4H00r-l71s-UURm-C32C-wDuS-fEF2-wlJFI0 Then I use same way to create a lv on mpath6-part1 and mpath7-part1 After rebooting host, there are some error logs happen. Multipath can’t find mpath6 and mapth7. Of course the logical volums on Mpath6 and mpath7 were lost also. root@SGELLIN119:~# multipath -ll| grep SYMM mpath9 (360000970000192602316533030453335) dm-3 EMC,SYMMETRIX mpath8 (360000970000192602316533030453334) dm-2 EMC,SYMMETRIX mpath5 (360000970000192602316533030453331) dm-5 EMC,SYMMETRIX root@SGELLIN119:~# lvs -v Finding all logical volumes LV VG #Seg Attr LSize Maj Min KMaj KMin Origin Snap% Move Copy% Log Convert LV UUID mlv my_vg 1 -wi-a- 1020.00m -1 -1 252 1 c3cECW-CJry-OdXI-O9bZ-lXq8-BUYq-obzcvB the finding is that if creating lvm on disk primary partition 1. Something were changed and it lead multipath couldn’t find devices. root@SGELLIN119:~# udevadm info --query=all --name=/dev/mapper/mpath6 P: /devices/virtual/block/dm-8 N: dm-8 L: -100 S: mapper/mpath6 S: disk/by-id/dm-name-mpath6 S: disk/by-id/dm-uuid-mpath-360000970000192602316533030453332 E: UDEV_LOG=3 E: DEVPATH=/devices/virtual/block/dm-8 E: MAJOR=252 E: MINOR=8 E: DEVNAME=/dev/dm-8 E: DEVTYPE=disk E: SUBSYSTEM=block E: DM_NAME=mpath6 E: DM_UUID=mpath-360000970000192602316533030453332 E: DM_SUSPENDED=0 E: DM_UDEV_RULES=1 E: DEVLINKS=/dev/mapper/mpath6 /dev/disk/by-id/dm-name-mpath6 /dev/disk/by-id/dm-uuid-mpath-360000970000192602316533030453332 Value "L" is negative compare to normal one Here is an temporary recovery way: 4) Service multipath-tools stop 5) Dmsetup remove_all 6) Service multipath-tools start However, the issue is consistent after I reboot OS. If I remove lv ( still have LVM package in OS) , multipath work well. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/multipath-tools/+bug/985741/+subscriptions -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to multipath-tools in Ubuntu. https://bugs.launchpad.net/bugs/985741 Title: multipath can't show device on which is setup lvm To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/multipath-tools/+bug/985741/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
