Bug 1447809
| Summary: | RAID TAKEOVER: conversion attempts *to* linear should execute interim possibilities until linear is achieved | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Corey Marthaler <cmarthal> |
| Component: | lvm2 | Assignee: | Heinz Mauelshagen <heinzm> |
| lvm2 sub component: | Mirroring and RAID | QA Contact: | cluster-qe <cluster-qe> |
| Status: | CLOSED ERRATA | Docs Contact: | |
| Severity: | low | ||
| Priority: | unspecified | CC: | agk, cluster-qe, heinzm, jbrassow, mcsontos, msnitzer, prajnoha, rhandlin, zkabelac |
| Version: | 7.4 | ||
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | lvm2-2.02.180-6.el7 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2018-10-30 11:02:16 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
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Description
Corey Marthaler
2017-05-03 23:10:53 UTC
lvm2 upstream commit bd7cdd0b09ba123b064937fddde08daacbed7dab All the segtypes listed in comment #0 appeared to have been properly converted to linear, *with the exception* of raid6 and raid10. 3.10.0-931.el7.x86_64 lvm2-2.02.180-2.el7 BUILT: Wed Aug 1 11:22:48 CDT 2018 lvm2-libs-2.02.180-2.el7 BUILT: Wed Aug 1 11:22:48 CDT 2018 lvm2-cluster-2.02.180-2.el7 BUILT: Wed Aug 1 11:22:48 CDT 2018 device-mapper-1.02.149-2.el7 BUILT: Wed Aug 1 11:22:48 CDT 2018 device-mapper-libs-1.02.149-2.el7 BUILT: Wed Aug 1 11:22:48 CDT 2018 device-mapper-event-1.02.149-2.el7 BUILT: Wed Aug 1 11:22:48 CDT 2018 device-mapper-event-libs-1.02.149-2.el7 BUILT: Wed Aug 1 11:22:48 CDT 2018 device-mapper-persistent-data-0.7.3-3.el7 BUILT: Tue Nov 14 05:07:18 CST 2017 ### 1. mirror and raid1 ### (PASSES) [root@host-093 ~]# lvcreate -m 3 -L 100M --type mirror VG Logical volume "lvol0" created. [root@host-093 ~]# lvcreate -m 3 -L 100M --type raid1 VG Logical volume "lvol1" created. [root@host-093 ~]# lvs -a -o +devices,segtype LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert Devices Type lvol0 VG mwi-a-m--- 100.00m [lvol0_mlog] 100.00 lvol0_mimage_0(0),lvol0_mimage_1(0),lvol0_mimage_2(0),lvol0_mimage_3(0) mirror [lvol0_mimage_0] VG iwi-aom--- 100.00m /dev/sda1(0) linear [lvol0_mimage_1] VG iwi-aom--- 100.00m /dev/sdb1(0) linear [lvol0_mimage_2] VG iwi-aom--- 100.00m /dev/sdc1(0) linear [lvol0_mimage_3] VG iwi-aom--- 100.00m /dev/sdd1(0) linear [lvol0_mlog] VG lwi-aom--- 4.00m /dev/sdh1(0) linear lvol1 VG rwi-a-r--- 100.00m 100.00 lvol1_rimage_0(0),lvol1_rimage_1(0),lvol1_rimage_2(0),lvol1_rimage_3(0) raid1 [lvol1_rimage_0] VG iwi-aor--- 100.00m /dev/sda1(26) linear [lvol1_rimage_1] VG iwi-aor--- 100.00m /dev/sdb1(26) linear [lvol1_rimage_2] VG iwi-aor--- 100.00m /dev/sdc1(26) linear [lvol1_rimage_3] VG iwi-aor--- 100.00m /dev/sdd1(26) linear [lvol1_rmeta_0] VG ewi-aor--- 4.00m /dev/sda1(25) linear [lvol1_rmeta_1] VG ewi-aor--- 4.00m /dev/sdb1(25) linear [lvol1_rmeta_2] VG ewi-aor--- 4.00m /dev/sdc1(25) linear [lvol1_rmeta_3] VG ewi-aor--- 4.00m /dev/sdd1(25) linear [root@host-093 ~]# lvconvert --yes --type linear VG/lvol0 Logical volume VG/lvol0 converted. [root@host-093 ~]# lvconvert --yes --type linear VG/lvol1 Logical volume VG/lvol1 successfully converted. [root@host-093 ~]# lvs -a -o +devices,segtype LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert Devices Type lvol0 VG -wi-a----- 100.00m /dev/sda1(0) linear lvol1 VG -wi-a----- 100.00m /dev/sda1(26) linear ### 2. raid5 ### (PASSES) [root@host-093 ~]# lvcreate -i 2 -L 100M --type raid5 VG Using default stripesize 64.00 KiB. Rounding size 100.00 MiB (25 extents) up to stripe boundary size 104.00 MiB(26 extents). Logical volume "lvol2" created. [root@host-093 ~]# lvs -a -o +devices,segtype LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert Devices Type lvol2 VG rwi-a-r--- 104.00m 100.00 lvol2_rimage_0(0),lvol2_rimage_1(0),lvol2_rimage_2(0) raid5 [lvol2_rimage_0] VG iwi-aor--- 52.00m /dev/sda1(52) linear [lvol2_rimage_1] VG iwi-aor--- 52.00m /dev/sdb1(1) linear [lvol2_rimage_2] VG iwi-aor--- 52.00m /dev/sdc1(1) linear [lvol2_rmeta_0] VG ewi-aor--- 4.00m /dev/sda1(51) linear [lvol2_rmeta_1] VG ewi-aor--- 4.00m /dev/sdb1(0) linear [lvol2_rmeta_2] VG ewi-aor--- 4.00m /dev/sdc1(0) linear [root@host-093 ~]# lvconvert --yes --type linear VG/lvol2 Replaced LV type linear with possible type raid5_n. Repeat this command to convert to linear after an interim conversion has finished. Converting raid5 (same as raid5_ls) LV VG/lvol2 to raid5_n. Logical volume VG/lvol2 successfully converted. # Note --force required here [root@host-093 ~]# lvconvert --yes --force --type linear VG/lvol2 Converting raid5_n LV VG/lvol2 to 2 stripes first. Replaced LV type linear with possible type raid5_n. Repeat this command to convert to linear after an interim conversion has finished. WARNING: Removing stripes from active logical volume VG/lvol2 will shrink it from 104.00 MiB to 52.00 MiB! THIS MAY DESTROY (PARTS OF) YOUR DATA! If that leaves the logical volume larger than 52 extents due to stripe rounding, you may want to grow the content afterwards (filesystem etc.) WARNING: to remove freed stripes after the conversion has finished, you have to run "lvconvert --stripes 1 VG/lvol2" Logical volume VG/lvol2 successfully converted. [root@host-093 ~]# lvs -a -o +devices,segtype LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert Devices Type lvol2 VG rwi-a-r-R- 104.00m 100.00 lvol2_rimage_0(0),lvol2_rimage_1(0),lvol2_rimage_2(0) raid5_n [lvol2_rimage_0] VG iwi-aor--- 56.00m /dev/sda1(53) linear [lvol2_rimage_0] VG iwi-aor--- 56.00m /dev/sda1(52) linear [lvol2_rimage_1] VG iwi-aor--- 56.00m /dev/sdb1(2) linear [lvol2_rimage_1] VG iwi-aor--- 56.00m /dev/sdb1(1) linear [lvol2_rimage_2] VG Iwi-aor-R- 56.00m /dev/sdc1(2) linear [lvol2_rimage_2] VG Iwi-aor-R- 56.00m /dev/sdc1(1) linear [lvol2_rmeta_0] VG ewi-aor--- 4.00m /dev/sda1(51) linear [lvol2_rmeta_1] VG ewi-aor--- 4.00m /dev/sdb1(0) linear [lvol2_rmeta_2] VG ewi-aor-R- 4.00m /dev/sdc1(0) linear [root@host-093 ~]# lvconvert --stripes 1 VG/lvol2 Logical volume VG/lvol2 successfully converted. [root@host-093 ~]# lvs -a -o +devices,segtype LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert Devices Type lvol0 VG -wi-a----- 100.00m /dev/sda1(0) linear lvol1 VG -wi-a----- 100.00m /dev/sda1(26) linear lvol2 VG rwi-a-r--- 52.00m 100.00 lvol2_rimage_0(0),lvol2_rimage_1(0) raid5_n [lvol2_rimage_0] VG iwi-aor--- 56.00m /dev/sda1(53) linear [lvol2_rimage_0] VG iwi-aor--- 56.00m /dev/sda1(52) linear [lvol2_rimage_1] VG iwi-aor--- 56.00m /dev/sdb1(2) linear [lvol2_rimage_1] VG iwi-aor--- 56.00m /dev/sdb1(1) linear [lvol2_rmeta_0] VG ewi-aor--- 4.00m /dev/sda1(51) linear [lvol2_rmeta_1] VG ewi-aor--- 4.00m /dev/sdb1(0) linear [root@host-093 ~]# lvconvert --yes --force --type linear VG/lvol2 Replaced LV type linear with possible type raid1. Repeat this command to convert to linear after an interim conversion has finished. Logical volume VG/lvol2 successfully converted. [root@host-093 ~]# lvconvert --yes --force --type linear VG/lvol2 Logical volume VG/lvol2 successfully converted. [root@host-093 ~]# lvs -a -o +devices,segtype LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert Devices Type lvol2 VG -wi-a----- 52.00m /dev/sda1(54) linear lvol2 VG -wi-a----- 52.00m /dev/sda1(52) linear ### 3. raid5_n ### (PASSES) [root@host-093 ~]# lvcreate -i 2 -L 100M --type raid5_n VG Using default stripesize 64.00 KiB. Rounding size 100.00 MiB (25 extents) up to stripe boundary size 104.00 MiB(26 extents). Logical volume "lvol0" created. [root@host-093 ~]# lvconvert --yes --force --type linear VG/lvol0 Converting raid5_n LV VG/lvol0 to 2 stripes first. Replaced LV type linear with possible type raid5_n. Repeat this command to convert to linear after an interim conversion has finished. WARNING: Removing stripes from active logical volume VG/lvol0 will shrink it from 104.00 MiB to 52.00 MiB! THIS MAY DESTROY (PARTS OF) YOUR DATA! If that leaves the logical volume larger than 52 extents due to stripe rounding, you may want to grow the content afterwards (filesystem etc.) WARNING: to remove freed stripes after the conversion has finished, you have to run "lvconvert --stripes 1 VG/lvol0" Logical volume VG/lvol0 successfully converted. [root@host-093 ~]# lvconvert --yes --force --type linear VG/lvol0 Converting raid5_n LV VG/lvol0 to 2 stripes first. Replaced LV type linear with possible type raid5_n. Repeat this command to convert to linear after an interim conversion has finished. Logical volume VG/lvol0 successfully converted. [root@host-093 ~]# lvconvert --yes --force --type linear VG/lvol0 Replaced LV type linear with possible type raid1. Repeat this command to convert to linear after an interim conversion has finished. Logical volume VG/lvol0 successfully converted. [root@host-093 ~]# lvconvert --yes --force --type linear VG/lvol0 Logical volume VG/lvol0 successfully converted. ### 4. raid6 ### (FAILS) [root@host-093 ~]# lvcreate -i 3 -L 100M --type raid6 VG Using default stripesize 64.00 KiB. Rounding size 100.00 MiB (25 extents) up to stripe boundary size 108.00 MiB(27 extents). Logical volume "lvol0" created. [root@host-093 ~]# lvconvert --type linear VG/lvol0 Replaced LV type linear with possible type raid6_n_6. Repeat this command to convert to linear after an interim conversion has finished. Converting raid6 (same as raid6_zr) LV VG/lvol0 to raid6_n_6. Are you sure you want to convert raid6 LV VG/lvol0? [y/n]: ^C Interrupted... Logical volume VG/lvol0 NOT converted. Reshape request failed on LV VG/lvol0. [root@host-093 ~]# lvconvert --yes --force --type linear VG/lvol0 Replaced LV type linear with possible type raid6_n_6. Repeat this command to convert to linear after an interim conversion has finished. Converting raid6 (same as raid6_zr) LV VG/lvol0 to raid6_n_6. Logical volume VG/lvol0 successfully converted. [root@host-093 ~]# lvconvert --yes --force --type linear VG/lvol0 Unable to convert LV VG/lvol0 from raid6_n_6 to linear. Converting VG/lvol0 from raid6_n_6 is directly possible to the following layouts: raid0 raid0_meta striped raid4 raid5_n raid6_nc raid6_nr raid6_zr raid6_la_6 raid6_ls_6 raid6_ra_6 raid6_rs_6 ### 5. raid10 ### (FAILS) [root@host-093 ~]# lvcreate -i 3 -L 100M --type raid10 VG Using default stripesize 64.00 KiB. Rounding size 100.00 MiB (25 extents) up to stripe boundary size 108.00 MiB(27 extents). Logical volume "lvol0" created. [root@host-093 ~]# lvconvert --type linear VG/lvol0 Unable to convert LV VG/lvol0 from raid10 to linear. Converting VG/lvol0 from raid10 (same as raid10_near) is directly possible to the following layouts: raid0 raid0_meta striped Bug 1618806 may block the verification of this issue. (In reply to Corey Marthaler from comment #11) > Bug 1618806 may block the verification of this issue. It won't: as Corey says in https://bugzilla.redhat.com/show_bug.cgi?id=1618806#c4, lvm warns about data loss caused by shrinking the LV when converting from raid5 to linear (as with removing stripes from raid4/5/6). lvm2 upstream commit e83c4f07ca4a84808178d5d22cba655e5e370cd8 Both raid6 and raid10 are now capable of eventually being converted to liner, however the process is a bit convoluted. Marking verified in the latest rpms. ## raid6 -> linear [root@hayes-01 ~]# lvcreate -i 3 -L 100M --type raid6 centipede2 Using default stripesize 64.00 KiB. Rounding size 100.00 MiB (25 extents) up to stripe boundary size 108.00 MiB(27 extents). Logical volume "lvol0" created. # conversion to raid6_n_6 [root@hayes-01 ~]# lvconvert --yes --force --type linear centipede2/lvol0 Replaced LV type linear with possible type raid6_n_6. Repeat this command to convert to linear after an interim conversion has finished. Converting raid6 (same as raid6_zr) LV centipede2/lvol0 to raid6_n_6. Logical volume centipede2/lvol0 successfully converted. # first raid5_n conversion [root@hayes-01 ~]# lvconvert --yes --force --type linear centipede2/lvol0 Replaced LV type linear with possible type raid5_n. Repeat this command to convert to linear after an interim conversion has finished. Logical volume centipede2/lvol0 successfully converted. # second raid5_n (2 stripes) conversion [root@hayes-01 ~]# lvconvert --yes --force --type linear centipede2/lvol0 Converting raid5_n LV centipede2/lvol0 to 2 stripes first. WARNING: Removing stripes from active logical volume centipede2/lvol0 will shrink it from 108.00 MiB to 36.00 MiB! THIS MAY DESTROY (PARTS OF) YOUR DATA! If that leaves the logical volume larger than 81 extents due to stripe rounding, you may want to grow the content afterwards (filesystem etc.) WARNING: to remove freed stripes after the conversion has finished, you have to run "lvconvert --stripes 1 centipede2/lvol0" Logical volume centipede2/lvol0 successfully converted. # third raid5_n (2 stripes) conversion? Is this one reall necessary? [root@hayes-01 ~]# lvconvert --yes --force --type linear centipede2/lvol0 Converting raid5_n LV centipede2/lvol0 to 2 stripes first. Logical volume centipede2/lvol0 successfully converted. # conversion to raid1 [root@hayes-01 ~]# lvconvert --yes --force --type linear centipede2/lvol0 Replaced LV type linear with possible type raid1. Repeat this command to convert to linear after an interim conversion has finished. Logical volume centipede2/lvol0 successfully converted. # finally linear [root@hayes-01 ~]# lvconvert --yes --force --type linear centipede2/lvol0 Logical volume centipede2/lvol0 successfully converted. [root@hayes-01 ~]# lvs -a -o +devices,segtype LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert Devices Type lvol0 centipede2 -wi-a----- 36.00m /dev/sdb1(3) linear ## raid10 -> linear [root@hayes-01 ~]# lvcreate -i 3 -L 100M --type raid10 centipede2 Using default stripesize 64.00 KiB. Rounding size 100.00 MiB (25 extents) up to stripe boundary size 108.00 MiB(27 extents). Logical volume "lvol0" created. [root@hayes-01 ~]# lvconvert --type linear centipede2/lvol0 Replaced LV type linear with possible type raid0_meta. Repeat this command to convert to linear after an interim conversion has finished. Are you sure you want to convert raid10 LV centipede2/lvol0 to raid0_meta type? [y/n]: y Logical volume centipede2/lvol0 successfully converted. [root@hayes-01 ~]# lvconvert --type linear centipede2/lvol0 Replaced LV type linear with possible type raid5_n. Repeat this command to convert to linear after an interim conversion has finished. Are you sure you want to convert raid0_meta LV centipede2/lvol0 to raid5_n type? [y/n]: y Logical volume centipede2/lvol0 successfully converted. [root@hayes-01 ~]# lvconvert --type linear centipede2/lvol0 Converting raid5_n LV centipede2/lvol0 to 2 stripes first. WARNING: Removing stripes from active logical volume centipede2/lvol0 will shrink it from 108.00 MiB to 36.00 MiB! THIS MAY DESTROY (PARTS OF) YOUR DATA! Interrupt the conversion and run "lvresize -y -l81 centipede2/lvol0" to keep the current size if not done already! If that leaves the logical volume larger than 81 extents due to stripe rounding, you may want to grow the content afterwards (filesystem etc.) WARNING: to remove freed stripes after the conversion has finished, you have to run "lvconvert --stripes 1 centipede2/lvol0" Can't remove stripes without --force option. Reshape request failed on LV centipede2/lvol0. [root@hayes-01 ~]# lvconvert --force --stripes 1 centipede2/lvol0 WARNING: Removing stripes from active logical volume centipede2/lvol0 will shrink it from 108.00 MiB to 36.00 MiB! THIS MAY DESTROY (PARTS OF) YOUR DATA! Interrupt the conversion and run "lvresize -y -l81 centipede2/lvol0" to keep the current size if not done already! If that leaves the logical volume larger than 81 extents due to stripe rounding, you may want to grow the content afterwards (filesystem etc.) WARNING: to remove freed stripes after the conversion has finished, you have to run "lvconvert --stripes 1 centipede2/lvol0" Are you sure you want to remove 2 images from raid5_n LV centipede2/lvol0? [y/n]: y Logical volume centipede2/lvol0 successfully converted. [root@hayes-01 ~]# lvconvert --type linear centipede2/lvol0 Converting raid5_n LV centipede2/lvol0 to 2 stripes first. Logical volume centipede2/lvol0 successfully converted. [root@hayes-01 ~]# lvconvert --type linear centipede2/lvol0 Replaced LV type linear with possible type raid1. Repeat this command to convert to linear after an interim conversion has finished. Are you sure you want to convert raid5_n LV centipede2/lvol0 to raid1 type? [y/n]: y Logical volume centipede2/lvol0 successfully converted. [root@hayes-01 ~]# lvconvert --type linear centipede2/lvol0 Are you sure you want to convert raid1 LV centipede2/lvol0 to type linear losing all resilience? [y/n]: y Logical volume centipede2/lvol0 successfully converted. [root@hayes-01 ~]# lvs -a -o +devices,segtype LV VG Attr LSize Devices Type lvol0 centipede2 -wi-a----- 36.00m /dev/sdb1(2) linear Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2018:3193 |